DPO3000_UM

DPO3000_UM - xx DPO3000 Series Digital Phosphor...

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Unformatted text preview: xx DPO3000 Series Digital Phosphor Oscilloscopes ZZZ User Manual www.tektronix.com 071-2410-01 Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. e*Scope, iView, OpenChoice, TekSecure, and TekVPI are registered trademarks of Tektronix, Inc. Wave Inspector is a trademark of Tektronix, Inc. Contacting Tektronix Tektronix, Inc. 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA For product information, sales, service, and technical support: In North America, call 1-800-833-9200. Worldwide, visit www.tektronix.com to find contacts in your area. Warranty 16 Tektronix warrants that the product will be free from defects in materials and workmanship for a period of three (3) years from the date of original purchase from an authorized Tektronix distributor. If the product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Batteries are excluded from this warranty. Parts, modules and replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix. In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, shipping charges prepaid, and with a copy of customer proof of purchase. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations. This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product. THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. Table of Contents Table of Contents General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v viii Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Key Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Conventions Used in This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x x xi Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Before Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connecting Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Securing the Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Powering On the Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Powering Off the Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compensating a Passive Voltage Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application Module Free Trial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installing an Application Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing the User Interface Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing the Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Signal Path Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Upgrading Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connecting Your Oscilloscope to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 8 13 15 16 18 19 22 24 25 26 28 30 33 40 DPO3000 Series Oscilloscopes User Manual i Table of Contents Connecting a USB Keyboard to Your Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Get Acquainted with the Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front-Panel Menus and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front-Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Side-Panel Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear-Panel Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 49 72 73 74 Acquire the Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting Up Analog Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Default Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Autoset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Acquisition Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How the Analog Acquisition Modes Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing the Acquisition Mode, Record Length, and Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Roll Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting Up a Serial Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 76 83 84 85 88 90 93 95 Trigger Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Triggering Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Choosing a Trigger Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selecting Triggers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Triggering on Buses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Checking Trigger Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Sequence Trigger, A (Main) and B (Delayed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Starting and Stopping an Acquisition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii 48 107 107 114 116 121 130 131 135 DPO3000 Series Oscilloscopes User Manual Table of Contents Display Waveform Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adding and Removing a Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting the Display Style and Persistence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting Waveform Intensity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Scaling and Positioning a Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting Input Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Positioning and Labeling Bus Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Annotating the Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 136 136 143 144 146 151 153 Analyze Waveform Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taking Automatic Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selecting Automatic Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Customizing an Automatic Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taking Manual Measurements with Cursors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Math Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using FFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Advanced Math . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Reference Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using Wave Inspector to Manage Long Record Length Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 155 157 163 171 177 180 184 187 189 Save and Recall Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Saving a Screen Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Saving and Recalling Waveform Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Saving and Recalling Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 203 204 209 DPO3000 Series Oscilloscopes User Manual iii Table of Contents Saving with One Button Push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Printing a Hard Copy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Erasing Oscilloscope Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 214 223 Using Application Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226 Application Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taking Simple Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analyzing Signal Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Triggering on a Video Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Capturing a Single-Shot Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Correlating Data with a TLA5000 Logic Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tracking Down Bus Anomalies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting an RS-232 Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 227 240 249 255 261 263 268 Appendix: Warranted Specifications, Safety Certifications, and Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273 Index iv DPO3000 Series Oscilloscopes User Manual General Safety Summary General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use. Connect and Disconnect Properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source. Connect and Disconnect Properly. De-energize the circuit under test before connecting or disconnecting the current probe. Ground the Product. This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded. Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and markings on the product. Consult the product manual for further ratings information before making connections to the product. Connect the probe reference lead to earth ground only. Do not apply a potential to any terminal, including the common terminal, that exceeds the maximum rating of that terminal. Power Disconnect. The power cord disconnects the product from the power source. Do not block the power cord; it must remain accessible to the user at all times. DPO3000 Series Oscilloscopes User Manual v General Safety Summary Do Not Operate Without Covers. Do not operate this product with covers or panels removed. Do Not Operate With Suspected Failures. If you suspect that there is damage to this product, have it inspected by qualified service personnel. Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present. Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. Terms in this Manual These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. vi DPO3000 Series Oscilloscopes User Manual General Safety Summary Symbols and Terms on the Product These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. The following symbol(s) may appear on the product: DPO3000 Series Oscilloscopes User Manual vii Environmental Considerations Environmental Considerations This section provides information about the environmental impact of the product. Product End-of-Life Handling Observe the following guidelines when recycling an instrument or component: Equipment Recycling. Production of this equipment required the extraction and use of natural resources. The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product’s end of life. In order to avoid release of such substances into the environment and to reduce the use of natural resources, we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately. The symbol shown below indicates that this product complies with the European Union’s requirements according to Directive 2002/96/EC on waste electrical and electronic equipment (WEEE). For information about recycling options, check the Support/Service section of the Tektronix Web site (www.tektronix.com). Mercury Notification. This product uses an LCD backlight lamp that contains mercury. Disposal may be regulated due to environmental considerations. Please contact your local authorities or, within the United States, the Electronics Industries Alliance (www.eiae.org) for disposal or recycling information. viii DPO3000 Series Oscilloscopes User Manual Environmental Considerations Restriction of Hazardous Substances This product has been classified as Monitoring and Control equipment, and is outside the scope of the 2002/95/EC RoHS Directive. DPO3000 Series Oscilloscopes User Manual ix Preface Preface This manual describes the installation and operation of the following oscilloscopes: DPO3054 DPO3052 DPO3014 DPO3034 DPO3032 DPO3012 Key Features DPO3000 series instruments can help you verify, debug, and characterize electronic designs. Key features include: 500 MHz, 300 MHz, and 100 MHz bandwidths 2 and 4 channel models Sample rates up to 2.5 GS/s on all analog channels 5 M points record length on all channels 50,000 waveforms/second display rate I2C, SPI, CAN, LIN, RS-232, RS-422, RS-485, and UART bus triggering and analysis (with the appropriate application module and model oscilloscope) Wave Inspector controls for managing long record lengths, with zoom and pan, play and pause, search and mark 229 mm (9 inch), with 800 x 480 resolution, WVGA color display Small and lightweight, at 127 mm (5 inches) deep and 4.1 kg (9 pounds) USB available for quick and easy storage x DPO3000 Series Oscilloscopes User Manual Preface Built-in Ethernet port USB 2.0 device port for direct PC control of the oscilloscope using USBTMC protocol OpenChoice documentation and analysis software NI LabVIEW SignalExpress™ Tektronix Edition productivity and analysis software Remote viewing and control with e*Scope Remote control with VISA connectivity TekVPI Versatile Probe Interface supports active, differential, and current probes for automatic scaling and units Conventions Used in This Manual The following icons are used throughout this manual. Sequence Step Front panel power DPO3000 Series Oscilloscopes User Manual Connect power Network USB xi Preface xii DPO3000 Series Oscilloscopes User Manual Installation Installation Before Installation Unpack the oscilloscope and check that you received all items listed as standard accessories. The following pages list recommended accessories and probes, instrument options, and upgrades. Check the Tektronix Web site (www.tektronix.com) for the most current information. DPO3000 Series Oscilloscopes User Manual 1 Installation Standard Accessories Accessory Description Tektronix part number DPO3000 Series Oscilloscopes User Manual English (Option L0) 071-2410-XX French (Option L1) 071-2411-XX Italian (Option L2) 071-2412-XX German (Option L3) 071-2413-XX Spanish (Option L4) 071-2414-XX Japanese (Option L5) 071-2415-XX Portuguese (Option L6) 071-2416-XX Simple Chinese (Option L7) 071-2417-XX Traditional Chinese (Option L8) 071-2418-XX Korean (Option L9) 071-2419-XX Russian (Option L10) 071-2420-XX DPO3000 Series Oscilloscopes Documentation Browser CD Electronic versions of documents, including the Programmer Manual and the Technical Reference 063-4104-XX NI LabVIEW SignalExpress Tektronix Edition and Tektronix OpenChoice Desktop CD Productivity, analysis, and documentation software 063-3967-XX Calibration certificate documenting traceability to national metrology institute(s), and ISO9001 quality system registration 2 —— DPO3000 Series Oscilloscopes User Manual Installation Standard Accessories (cont.) Accessory Description Tektronix part number Front Panel Overlay French (Option L1) 335-1917-00 Italian (Option L2) 335-1918-00 German (Option L3) 335-1919-00 Spanish (Option L4) 335-1920-00 Japanese (Option L5) 335-1921-00 Portuguese (Option L6) 335-1922-00 Simplified Chinese (Option L7) 335-1923-00 Traditional Chinese (option L8) 335-1924-00 Korean (Option L9) 335-1925-00 Russian (Option L10) 335-1926-00 For DPO3000 series: Probes One, 500 MHz, 10X passive probe per channel P6139A Front Cover Hard plastic cover to help protect the instrument 200-2524-00 DPO3000 Series Oscilloscopes User Manual 3 Installation Standard Accessories (cont.) Accessory Description Tektronix part number Power Cord North America (Option A0) 161-0348-00 Universal Euro (Option A1) 161-0343-00 United Kingdom (Option A2) 161-0344-00 Australia (Option A3) 161-0346-00 Switzerland (Option A5) 161-0347-00 Japan (Option A6) 161-0342-00 China (Option A10) 161-0341-00 India (Option A11) 161-0349-00 —— No power cord or AC adapter (Option A99) 4 DPO3000 Series Oscilloscopes User Manual Installation Optional Accessories Accessory Description Tektronix part number DPO3EMBD The embedded serial triggering and analysis module enables triggering on packet level information on I2C and SPI serial buses, as well as digital views of the signal, bus views, bus decoding, search tools, and packet decode tables with timestamp information DPO3EMBD DPO3AUTO The automotive serial triggering and analysis module enables triggering on packet level information on CAN and LIN serial buses, as well as digital views of the signal, bus views, bus decoding, search tools, and packet decode tables with timestamp information DPO3AUTO DPO3COMP The computer triggering and analysis module enables triggering on RS-232, RS-422, RS-485 and UART serial buses, search tools, bus views, bus decoding in hex, binary, and ASCII, and decode tables with timestamp information DPO3COMP DPO3VID The extended video module enables triggering on a variety of standard HDTV signals, as well as on custom (non-standard) bilevel and trilevel video signals with 3 to 4,000 lines. DPO3VID TPA-BNC TekVPI to TekProbe II BNC Adapter TPA-BNC DPO3000 Series Oscilloscopes User Manual 5 Installation Optional Accessories (cont.) Accessory TEK-USB-488 Adapter GPIB to USB Adapter TEK-USB-488 Getting Started with OpenChoice Solutions Manual with CD Describes ways to develop host-computer software applications that work with your oscilloscope 020-2513-XX Rackmount kit Adds rackmount brackets RMD3000 Soft transit case Case for carrying instrument ACD4000 Hard transit case Traveling case, which requires use of the soft transit case (ACD4000) HCTEK4321 USB flash drive Extra storage 119-7276-00 DPO3000 Series Oscilloscopes Programmer Manual Describes commands for remote control of the oscilloscope. Available electronically on the Documentation Browser CD or for download from www.tektronix.com/manuals 071-2421-XX DPO3000 Series Oscilloscopes Technical Reference Manual 6 Description Tektronix part number Describes the oscilloscope specifications and performance verification procedure. Available electronically on the Documentation Browser CD or for download from www.tektronix.com/manuals 071-2423-XX DPO3000 Series Oscilloscopes User Manual Installation Optional Accessories (cont.) Accessory Description Tektronix part number DPO3000 Series Oscilloscopes Service manual Service information on DPO3000 oscilloscopes 071-2422-XX DPO3000 Series Oscilloscopes Module Installation Manual 071-2524-XX The DPO3000 series oscilloscopes work with multiple optional probes. (See page 13, Connecting Probes.) Check the Tektronix Web site (www.tektronix.com) for the most current information. DPO3000 Series Oscilloscopes User Manual 7 Installation Operating Considerations DPO3000 Series Oscilloscopes Input Voltage: 100 V to 240 V ± 10% Input Power Frequency: 50/60 Hz at 100 V to 240 V 400 Hz ± 10% at 115 V Power Consumption: 120 W maximum Weight: 4.2 kg (9.2 lbs), standalone instrument Height, including feet but not handle: 203.2 mm (8 in) Width, 416.6 mm (16.4 in) Depth, 147.4 mm (5.8 in) Clearance: 51 mm (2 in) DPO3000 series Temperature: Operating: +0 °C to +50 °C Nonoperating: -40 °C to +71 °C 8 DPO3000 Series Oscilloscopes User Manual Installation Humidity: Operating: 5% to 95% relative humidity (RH) at up to +30 °C Operating: 5% to 45% relative humidity (RH) above +30 °C up to + 50 °C, non-condensing, and as limited by a Maximum Wet-Bulb Temperature of +38 °C (derates relative humidity to 45 % RH at +50 °C) Non-operating: 5% to 95% Relative Humidity (RH) at up to +30 °C Non-operating: 5% to 45% Relative Humidity (RH) above +30 °C up to +50 °C, non-condensing, and as limited by a Maximum Wet-Bulb Temperature of +38 °C (derates relative humidity to 27% RH at 60 C) Altitude: Operating: 3,000 m (9,843 ft) Nonoperating Altitude: 12,000 m (39,370 ft) Random Vibration: Operating: 0.31 GRMS, 5 – 500 Hz, 10 minutes per axis, 3 axes (30 minutes total) Non-operating: 2.46 GRMS, 5 – 500 Hz, 10 minutes per axis, 3 axes (30 minutes total) Pollution Degree: 2, Indoor use only Acquisition System: 1 MΩ The maximum input voltage: At front panel connector, 300 VRMS, Installation Category II; for measurements performed on circuits directly connected to the low-voltage installation. Acquisition System: 50 Ω and 75 Ω The maximum input voltage: 5 VRMS with a peak at ±20. For Installation Category I measurements. Not for connection to Installation Category II, III, or IV circuits. DPO3000 Series Oscilloscopes User Manual 9 Installation Aux In: 1 MΩ The maximum input voltage: At the front-panel connector, 300 VRMS, Installation Category II; for measurements performed on circuits directly connected to the low-voltage installation. CAUTION. To ensure proper cooling, keep the sides and rear of the instrument clear of obstructions. Total Probe Power: If the total probe power requirements exceed the available power from the oscilloscope, connect the external AC adapter (Tektronix part number 119-7465-XX) to the rear-panel Probe Power connector. Maximum Probe Power Available Per Channel (3 or 5 TekVPI Interfaces): 5 V ± 5%, 50 mA max., 250 mW max. 12 V ± 10%, 2 A max., 24 W max. 10 DPO3000 Series Oscilloscopes User Manual Installation P6139A Passive Probe Input Voltage: 400 VRMS or 400 V DC; CAT I (2,500 Vpk transient) 300 VRMS or 300 V DC; CAT II (2,500 Vpk transient 150 VRMS or 150 V DC; CAT III (2,500 Vpk transient) For steady-state, sinusoidal waveforms, derate at 20 dB/decade above 2.5 MHz to 50 VRMS at 20 MHz and above. Output Voltage (terminated into 1 MΩ): 40 VRMS or 40 V DC; CAT I (2,500 Vpk impulse) 30 VRMS or 30 V DC; CAT I (250 Vpk impulse) 15 VRMS or 15 V DC; CAT I (250 Vpk impulse) Temperature: Operating: -15 °C to +65 °C ( +5 °F to +149 °F) Nonoperating: -62 °C to +85 °C ( -80 °F to +185 °F) Altitude: ≤ 2,000 meters Pollution Degree: 2, Indoor use only DPO3000 Series Oscilloscopes User Manual 11 Installation Humidity: Operating: High: 40 °C to 50 °C, 10% to 60% RH Operating: Low: 0 °C to 40 °C, 10 to 90% RH Cleaning Inspect the oscilloscope and probes as often as operating conditions require. To clean the exterior surface, perform the following steps: 1. Remove loose dust on the outside of the oscilloscope and probes with a lint-free cloth. Use care to avoid scratching the clear glass display filter. 2. Use a soft cloth dampened with water to clean the oscilloscope. Use an aqueous solution of 75% isopropyl alcohol for more efficient cleaning. CAUTION. To avoid damage to the surface of the oscilloscope or probes, do not use any abrasive or chemical cleaning agents. 12 DPO3000 Series Oscilloscopes User Manual Installation Connecting Probes The oscilloscope supports probes with the following: 1. Tektronix Versatile Probe Interface (TekVPI) These probes support two-way communication with the oscilloscope through on-screen menus and remotely through programmable support. The remote control is useful in applications like ATE where you want the system to preset probe parameters. 2. TPA-BNC Adapter The TPA-BNC Adapter allows you to use TEKPROBE II probe capabilities, such as providing probe power, and passing scaling and unit information to the oscilloscope. DPO3000 Series Oscilloscopes User Manual 13 Installation 3. Plain BNC Interfaces Some of these use TEKPROBE capabilities to pass the waveform signal and scaling to the oscilloscope. Some only pass the signal and there is no other communication. For more information on the many probes available for use with DPO3000 series oscilloscopes, refer to www.tektronix.com. 14 DPO3000 Series Oscilloscopes User Manual Installation Securing the Oscilloscope 1. Use a standard laptop computer style security lock to secure your oscilloscope to your location. DPO3000 Series Oscilloscopes User Manual 15 Installation Powering On the Oscilloscope Ground the Oscilloscope and Yourself Before pushing the power switch, connect the oscilloscope to an electrically neutral reference point, such as earth ground. Do this by plugging the three-pronged power cord into an outlet grounded to earth ground. Grounding the oscilloscope is necessary for safety and to take accurate measurements. The oscilloscope needs to share the same ground as any circuits that you are testing. If you are working with static sensitive components, ground yourself. Static electricity that builds up on your body can damage static-sensitive components. Wearing a grounding strap safely sends static charges on your body to earth ground. 16 DPO3000 Series Oscilloscopes User Manual Installation To connect the power cord and power on the oscilloscope: DPO3000 Series Oscilloscopes User Manual 17 Installation Powering Off the Oscilloscope To power off the oscilloscope and remove the power cord: 18 DPO3000 Series Oscilloscopes User Manual Installation Functional Check Perform this quick functional check to verify that your oscilloscope is operating correctly. 1. Connect the oscilloscope power cable as described in Powering On the Oscilloscope. (See page 16.) 2. Power on the oscilloscope. DPO3000 Series Oscilloscopes User Manual 19 Installation 3. Connect the P6139A probe tip and reference lead to the PROBE COMP connectors on the oscilloscope. 4. Push Default Setup. 20 DPO3000 Series Oscilloscopes User Manual Installation 5. Push Autoset. The screen should now display a square wave, approximately 2.5 V at 1 kHz. NOTE. For best performance, it is recommended that you set the Vertical scale to 500 mV. If the signal appears but is misshapen, perform the procedures for compensating the probe. (See page 22, Compensating a Passive Voltage Probe.) If no signal appears, rerun the procedure. If this does not remedy the situation, have the instrument serviced by qualified service personnel. DPO3000 Series Oscilloscopes User Manual 21 Installation Compensating a Passive Voltage Probe Whenever you attach a passive voltage probe for the first time to any input channel, compensate the probe to match it to the corresponding oscilloscope input channel. To properly compensate your passive probe: 1. Follow the steps for the functional check. (See page 19, Functional Check.) 2. Check the shape of the displayed waveform to determine if your probe is properly compensated. 22 Properly compensated Under compensated Over compensated DPO3000 Series Oscilloscopes User Manual Installation 3. If necessary, adjust your probe. Repeat as needed. DPO3000 Series Oscilloscopes User Manual 23 Installation Quick Tips Use the shortest possible ground lead and signal path to minimize probe-induced ringing and distortion on the measured signal. Signal with a short ground lead Signal with a long ground lead Application Module Free Trial A 30-day free trial is available for all application modules not installed in your oscilloscope. The trial period begins when you power on the oscilloscope for the first time. After 30 days, you must purchase the module if you want to continue using the application. To see the date when your free trial period expires, push the front panel Utility button, push the lower-bezel Utility Page button, use multipurpose knob a to select Config, and push the lower-bezel About button. 24 DPO3000 Series Oscilloscopes User Manual Installation Installing an Application Module CAUTION. To avoid damage to the oscilloscope or application module, observe ESD (electrostatic discharge) precautions. (See page 16, Powering On the Oscilloscope.) Turn off the oscilloscope power while removing or adding an application module. (See page 18, Powering Off the Oscilloscope.) Optional application module packages extend the capability of your oscilloscope. You can install up to four application modules at one time. Application modules go into the two slots with windows in the upper right corner of the front panel. Two additional slots are directly behind the two that you can see. To use these slots, install the module with the label facing away from you. Refer to the Tektronix 3000 Series Oscilloscopes Application Module Installation Instructions that came with your application module for instructions on installing and testing an application module. NOTE. If you remove an application module, the features provided by the application module become unavailable. To restore the features, turn off the oscilloscope power, reinstall the module and turn on the oscilloscope power. DPO3000 Series Oscilloscopes User Manual 25 Installation Changing the User Interface Language To change the language of the oscilloscope user interface, and to change the front-panel button labels through the use of an overlay: 1. Push Utility. 2. Push Utility Page. 3. Turn multipurpose knob a and select Config. 4. Push Language from the resulting lower-bezel menu. 26 Utility Page Config Utility Page Config Language English Set Date & Time TekSecure Erase Memory About DPO3000 Series Oscilloscopes User Manual Installation 5. Turn multipurpose knob a and select the desired language. Choose among: English, French, German, Italian, Spanish, Brazilian Portuguese, Russian, Japanese, Korean, Simplified Chinese, and Traditional Chinese. 6. If you choose to use English, be sure that the plastic front-panel overlay is removed. If you choose a language other than English, place the plastic overlay for the language that you desire over the front panel to display labels in that language. DPO3000 Series Oscilloscopes User Manual 27 Installation Changing the Date and Time To set the internal clock with the current date and time: 1. Push Utility. 2. Push Utility Page. Utility Page 3. Turn multipurpose knob a and select Config. 4. Push Set Date & Time. 28 Config System Config Language English Set Date & Time TekSecure Erase Memory About DPO3000 Series Oscilloscopes User Manual Installation 5. Push the side-bezel buttons and turn both multipurpose knobs (a and b) to set the time and date values. Set Date & Time Display Date & Time On| Off Hour 4 Minute 1 Month May Day 3 Year 2007 6. Push OK Enter Date & Time. DPO3000 Series Oscilloscopes User Manual OK Enter Date & Time 29 Installation Signal Path Compensation Signal Path Compensation (SPC) corrects for DC inaccuracies caused by temperature variations and/or long-term drift. Run the compensation whenever the ambient temperature has changed by more than 10 °C or once a week if you use vertical settings of 5 mV/division or less. Failure to do so may result in the instrument not meeting warranted performance levels at those volts/div settings. To compensate the signal path: 1. Warm up the oscilloscope for at least 20 minutes. Remove all input signals (probes and cables) from channel inputs. Input signals with AC components adversely affect SPC. 30 DPO3000 Series Oscilloscopes User Manual Installation 2. Push Utility. 3. Push Utility Page. Utility Page 4. Turn multipurpose knob a and select Calibration. Calibration 5. Push Signal Path from the lower-bezel menu. Utility Page Calibration DPO3000 Series Oscilloscopes User Manual Signal Path Pass Factory Pass 31 Installation 6. Push OK Compensate Signal Paths from the resulting side-bezel menu. OK Compensate Signal Paths The calibration will take approximately 10 minutes to complete. 7. After calibration, verify that the status indicator on the lower-bezel menu displays Pass. Utility Page Calibration Signal Path Pass Factory Pass If it does not, then recalibrate the instrument or have the instrument serviced by qualified service personnel. Service personnel use the factory calibration functions to calibrate the internal voltage references of the oscilloscope using external sources. Refer to your Tektronix field office or representative for assistance with factory calibration. NOTE. Signal Path Compensation does not include calibration to the probe tip. (See page 22, Compensating a Passive Voltage Probe.) 32 DPO3000 Series Oscilloscopes User Manual Installation Upgrading Firmware To upgrade the firmware of the oscilloscope: 1. Open up a Web browser and go to www.tektronix.com/software. Proceed to the software finder. Download the latest firmware for your oscilloscope on your PC. Unzip the files and copy the firmware.img file into the root folder of a USB flash drive. DPO3000 Series Oscilloscopes User Manual 33 Installation 2. Power off your oscilloscope. 34 DPO3000 Series Oscilloscopes User Manual Installation 3. Insert the USB flash drive into the front-panel USB port on your oscilloscope. DPO3000 Series Oscilloscopes User Manual 35 Installation 4. Power on the oscilloscope. The instrument automatically recognizes the replacement firmware and installs it. If the instrument does not install the firmware, rerun the procedure. If the problem continues, try a different model of USB flash drive. Finally, if needed, contact qualified service personnel. NOTE. Do not power off the oscilloscope or remove the USB flash drive until the oscilloscope finishes installing the firmware. 36 DPO3000 Series Oscilloscopes User Manual Installation 5. Power off the oscilloscope and remove the USB flash drive. DPO3000 Series Oscilloscopes User Manual 37 Installation 6. Power on the oscilloscope. 7. Push Utility. 38 DPO3000 Series Oscilloscopes User Manual Installation 8. Push Utility Page. Utility Page 9. Turn multipurpose knob a and select Config. Config 10. Push About. The oscilloscope displays the firmware version number. Utility Page Config Language English Set Date & Time TekSecure Erase Memory About 11. Confirm that the version number matches that of the new firmware. DPO3000 Series Oscilloscopes User Manual 39 Installation Connecting Your Oscilloscope to a Computer You may want to document your work for future reference. Instead of saving screen images and waveform data to a USB flash drive, and then generating a report later, you may want to send the image or waveform data directly to a remote PC for analysis. You may also want to control an oscilloscope at a remote location from your computer. (See page 203, Saving a Screen Image.) (See page 204, Saving and Recalling Waveform Data.) Two ways to connect your oscilloscope to a computer are through the VISA drivers and the e*Scope Web-enabled tools. Use VISA to communicate with your oscilloscope from your computer through a software application. Use e*Scope to communicate with your oscilloscope through a Web browser. Using VISA VISA lets you use your MS-Windows computer to acquire data from your oscilloscope for use in an analysis package that runs on your PC, such as Microsoft Excel, National Instruments LabVIEW, or a program of your own creation. You can use a common communications connection, such as USB, Ethernet, or GPIB, to connect the computer to the oscilloscope. To set up VISA communications between your oscilloscope and a computer: 1. Load the VISA drivers on your computer. You will find the drivers on the appropriate CD that comes with your oscilloscope or at the Tektronix software finder Web page (www.tektronix.com/software). 40 DPO3000 Series Oscilloscopes User Manual Installation 2. Connect the oscilloscope to your computer with the appropriate USB or Ethernet cable. To communicate between the oscilloscope and a GPIB system, connect the oscilloscope to the TEK-USB-488 GPIB-to-USB Adapter with a USB cable. Then connect the adapter to your GPIB system with a GPIB cable. Cycle the power on the oscilloscope. DPO3000 Series Oscilloscopes User Manual 41 Installation 3. Push Utility. 4. Push Utility Page. 5. Turn multipurpose knob a and select I/O. 6. If you are using USB, the system sets itself up automatically for you, if USB is enabled. Utility Page I/O Utility Page I/O USB Enabled Ethernet Network Settings GPIB 1 Check USB on the lower-bezel menu to be sure that USB is enabled. If it is not enabled, push USB. Then push Enabled on the side-bezel menu. 42 DPO3000 Series Oscilloscopes User Manual Installation 7. To use Ethernet, push Ethernet Network Settings. On the side-bezel menu, if you are on a DHCP Ethernet network and using a through cable, set DHCP to On. If you are using a cross-over cable, set it to Off and set a hard coded TCPIP address. Change Instrument Settings DHCP/ BOOTP On| Off Test Connection 8. If you are using GPIB, push GPIB. Enter the GPIB address on the side-bezel menu, using multipurpose knob a. Talk/Listen Address (a) 1 This will set the GPIB address on an attached TEK-USB-488 Adapter. DPO3000 Series Oscilloscopes User Manual 43 Installation 9. Run your application software on your computer. Quick Tips The CD that is shipped with your oscilloscope includes a variety of Windows-based software tools designed to ensure efficient connectivity between your oscilloscope and your computer. There are toolbars that speed connectivity with Microsoft Excel and Word. There is also a standalone acquisition program called the OpenChoice Desktop. The rear-panel USB 2.0 device port is the correct USB port for computer connectivity. Use the rear- and front-panel USB 2.0 host ports to connect your oscilloscope to USB flash drives and printers. USB Host port USB Device port Using e*Scope e*Scope lets you access any Internet-connected DPO3000 series oscilloscope from a browser on your workstation, PC, or laptop computer. No matter where you are, your oscilloscope is as close as the nearest browser. 44 DPO3000 Series Oscilloscopes User Manual Installation To set up e*Scope communications between your oscilloscope and a Web browser running on a remote computer: 1. Connect the oscilloscope to your computer network with the appropriate Ethernet cable. If you are connecting directly to your computer, you need a Crossover Ethernet Cable. If you are connecting to a network or a hub you need a Straight Through Ethernet Cable. 2. Push Utility. DPO3000 Series Oscilloscopes User Manual 45 Installation 3. Push Utility Page. 4. Turn multipurpose knob a and select I/O. 5. Push Ethernet Network Settings. 46 Utility Page I/O Utility Page I/O USB Enabled Ethernet Network Settings GPIB 1 DPO3000 Series Oscilloscopes User Manual Installation 6. On the side-bezel menu, if you are on a DHCP Ethernet network and using dynamic addressing, set DHCP to On. If you are using static addressing, set it to Off. Push Change Instrument Settings. If you are using DHCP, note the Ethernet address and instrument name. If you are using Static addressing, enter the Ethernet address you will be using. Change Instrument Settings DHCP/ BOOTP On| Off Test Connection NOTE. Depending on the type and speed of network to which your DPO3000 series oscilloscope is connected, you may not see the DHCP/BOOTP field update instantaneously after pressing the DHCP/BOOTP button. It may take a few seconds to update. DPO3000 Series Oscilloscopes User Manual 47 Installation 7. Start your browser on your remote computer. In the browser address line, enter the IP address or, if DHCP is set to On in the oscilloscope, simply enter the instrument name. 8. You should now see the e*Scope screen showing the oscilloscope display, on your Web browser. If e*Scope does not work, rerun the procedure. If it still does not work, contact qualified service personnel. Connecting a USB Keyboard to Your Oscilloscope You can connect a US-style USB keyboard to a USB Host port on the rear or front panel of the oscilloscope. The oscilloscope will detect the keyboard, even if it is plugged in while the oscilloscope is powered on. You can use the keyboard to quickly create names or labels. You can bring up the Label menu through the lower-bezel label button of the Channel or Bus menus. Use the arrow keys on the keyboard to move the insertion point, and then type in a name or label. Labeling channels and buses makes the information on the screen easier to identify. 48 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument Get Acquainted with the Instrument Front-Panel Menus and Controls The front panel has buttons and controls for the functions that you use most often. Use the menu buttons to access more specialized functions. DPO3000 Series Oscilloscopes User Manual 49 Get Acquainted with the Instrument Using the Menu System To use the menu system: 1. Push a front-panel menu button to display the menu that you want to use. 50 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 2. Push a lower-bezel button to select a menu item. If a pop-out menu appears, turn multipurpose knob a to select the desired choice. If a pop-up menu appears, press the button again to select the desired choice. DPO3000 Series Oscilloscopes User Manual 51 Get Acquainted with the Instrument 3. Push a side-bezel button to choose a side-bezel menu item. If the menu item contains more than one choice, push the side-bezel button repeatedly to cycle through the choices. If a pop-out menu appears, turn multipurpose knob a to select the desired choice. 4. To remove a side-bezel menu, push the lower-bezel button again or push Menu Off. 52 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 5. Certain menu choices require you to set a numeric value to complete the setup. Use the upper and lower multipurpose knobs a and b to adjust values. 6. Push Fine to turn off or on the ability to make smaller adjustments. Using the Menu Buttons Use the menu buttons to perform many functions in the oscilloscope. DPO3000 Series Oscilloscopes User Manual 53 Get Acquainted with the Instrument 1. Measure. Push to perform automated measurements on waveforms or to configure cursors. 2. Search. Push to search through an acquisition for user-defined events/criteria. 3. Test. Push to activate advanced or application-specific testing features. 4. Acquire. Push to set the acquisition mode and adjust the record length. 5. Autoset. Push to perform an automatic setup of oscilloscope settings. 6. Trigger Menu. Push to specify trigger settings. 54 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 7. Utility. Push to activate the system utility functions, such as selecting a language or setting the date/time. 8. Save / Recall Menu. Push to save and recall setups, waveforms, and screen images to internal memory or a USB flash drive. 9. Channel 1,2,3, or 4 Menu. Push to set vertical parameters for input waveforms and to display or remove the corresponding waveform from the display. DPO3000 Series Oscilloscopes User Manual 55 Get Acquainted with the Instrument 10. B1 or B2. Push to define and display a bus if you have the appropriate module application keys. The DPO3AUTO module supports CAN and LIN buses. The DPO3EMBD module supports I2C and SPI. The DPO3COMP module supports RS-232, RS-422, RS-485, and UART buses. Also, push the B1 or B2 button to display or remove the corresponding bus from the display. 11. R. Push to manage reference waveforms, including the display or removal of each reference waveform from the display. 12. M. Push to manage the math waveform, including the display or removal of the math waveform from the display. Using Other Controls These buttons and knobs control waveforms, cursors, and other data input. 56 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 1. Turn the upper multipurpose knob a, when activated, to move a cursor, to set a numerical parameter value for a menu item, or to select from a pop-out list of choices. Push the Fine button to toggle between coarse and fine adjustment. Screen icons tell you when a or b are active. 2. Cursors. Push once to activate the two vertical cursors. Push again to turn on the two vertical and two horizontal cursors. Push again to turn off all cursors. When the cursors are on, you can turn the multipurpose knobs to control their position. DPO3000 Series Oscilloscopes User Manual 57 Get Acquainted with the Instrument 3. Select. Push to activate special functions. For example, when using the two vertical cursors (and no horizontal ones are visible), you can push this button to link or unlink the cursors. When the two vertical and two horizontal cursors are both visible, you can push this button to make either the vertical cursors or the horizontal cursors active. 4. Fine. Push to toggle between making coarse and fine adjustments with the vertical and horizontal position knobs, the trigger level knob, and many operations of multipurpose knobs a and b. 5. Waveform Intensity. Push to enable multipurpose knob a to control waveform display intensity and knob b to control graticule intensity. 58 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 6. Turn the lower multipurpose knob b, when activated, to move a cursor or set a numerical parameter value for a menu item. Push Fine to make adjustments more slowly. 7. Zoom button. Push to activate zoom mode. 8. Pan (outer knob). Turn to scroll the zoom window through the acquired waveform. 9. Zoom (inner knob). Turn to control the zoom factor. Turning it clockwise zooms in further. Turning it counterclockwise zooms out. 10. Play-pause button. Push to start or stop the automatic panning of a waveform. Control the speed and direction with the pan knob. DPO3000 Series Oscilloscopes User Manual 59 Get Acquainted with the Instrument 11. ← Prev. Push to jump to the previous waveform mark. 12. Set/Clear Mark. Push to establish or delete a waveform mark. 13. → Next. Push to jump to the next waveform mark. 14. Horizontal Position. Turn to adjust the trigger point location relative to the acquired waveforms. Push Fine to make smaller adjustments. 15. Horizontal Scale. Turn to adjust the horizontal scale (time/division). 60 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 16. Run/Stop. Push to start or stop acquisitions. 17. Single. Push to make a single acquisition. 18. Autoset. Push to automatically set the vertical, horizontal, and trigger controls for a usable, stable display. 19. Trigger Level. Turn to adjust the trigger level. Push this button to set the trigger level to the midpoint of the waveform. 20. Force Trig. Push to force an immediate trigger event. DPO3000 Series Oscilloscopes User Manual 61 Get Acquainted with the Instrument 21. Vertical Position. Turn to adjust the vertical position of the corresponding waveform. Push Fine to make smaller adjustments. 22. 1, 2, 3, 4. Push to display or remove the corresponding waveform from the display and access the vertical menu. 23. Vertical Scale. Turn to adjust the vertical scale factor of the corresponding waveform (volts/division). 24. Print. Push to print a screen image using the printer selected in the Utility menu. 25. Power switch. Push to power on or off the instrument. 62 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 26. USB 2.0 host port. Insert a USB cable here to connect peripherals to the oscilloscope, such as a keyboard, a printer, or a flash drive. There is one more USB 2.0 host port on the rear panel. 27. Save. Push to perform an immediate save operation. The save operation uses the current save parameters, as defined in the Save / Recall menu. 28. Default Setup. Push to perform an immediate restore of the oscilloscope to the default settings. 29. Menu Off. Push to clear a displayed menu from the screen. DPO3000 Series Oscilloscopes User Manual 63 Get Acquainted with the Instrument Identifying Items in the Display The items shown to the right may appear in the display. Not all of these items are visible at any given time. Some readouts move outside the graticule area when menus are turned off. 64 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 1. The acquisition readout shows when an acquisition is running, stopped, or when acquisition preview is in effect. Icons are: Run: Acquisitions enabled Stop: Acquisitions not enabled Roll: In roll mode (40 ms/div or slower) PreVu: In this state, the oscilloscope is stopped or between triggers. You can change the horizontal or vertical position or scale to see approximately what the next acquisition will look like. DPO3000 Series Oscilloscopes User Manual 65 Get Acquainted with the Instrument 2. The trigger position icon shows the trigger position in the acquisition. 3. The expansion point icon (an orange triangle) shows the point that the horizontal scale expands and compresses around. 4. The waveform record view shows the trigger location relative to the waveform record. The line color corresponds to the selected waveform color. 66 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 5. The trigger status readout shows trigger status. Status conditions are: Trig’d: Triggered Auto: Acquiring untriggered data PrTrig: Acquiring pretrigger data Trig?: Waiting for trigger 6. The cursor readout shows time, amplitude, and delta (Δ) values for each cursor. For FFT measurements, it shows frequency and magnitude. For serial buses, the readout shows the decoded values. DPO3000 Series Oscilloscopes User Manual 67 Get Acquainted with the Instrument 7. The trigger level icon shows the trigger level on the waveform. The icon color corresponds to the trigger source color. 8. The trigger readout shows the trigger source, slope, and level. The trigger readouts for other trigger types show other parameters. 9. The top line of the record length/sampling rate readout shows the sampling rate (adjust with the Horizontal Scale knob). The bottom line shows the record length (adjust with the Acquire menu). 68 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 10. The horizontal position/scale readout shows on the top line the horizontal scale (adjust with the Horizontal Scale knob). With Delay Mode on, the bottom line shows the time from the T symbol to the expansion point icon (adjust with the Horizontal Position knob). Use horizontal position to insert added delay between when the trigger occurs and when you actually capture the data. Insert a negative time to capture more pretrigger information. With Delay Mode off, the bottom line shows the time location of the trigger within the acquisition, as a percentage. DPO3000 Series Oscilloscopes User Manual 69 Get Acquainted with the Instrument 11. Measurement readouts show the selected measurements. You can select up to four measurements to display at one time. A symbol appears instead of the expected numerical measurement if a vertical clipping condition exists. Part of the waveform is above or below the display. To obtain a proper numerical measurement, turn the vertical scale and position knobs to make all of the waveform appear in the display. 12. The auxiliary waveform readouts show the vertical and horizontal scale factors of the math and reference waveforms. 13. The channel readout shows the channel scale factor (per division), coupling, invert, and bandwidth status. Adjust with the Vertical Scale knob and the channel 1, 2, 3, or 4 menus. 70 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 14. For analog channels, the waveform baseline indicator shows the zero-volt level of a waveform (ignoring the effect of offset). The icon colors correspond to the waveform colors. 15. The bus display shows decoded packet level information for serial buses or for parallel buses. DPO3000 Series Oscilloscopes User Manual 71 Get Acquainted with the Instrument Front-Panel Connectors 1. Channel 1, 2, (3, 4). Channel inputs with the TekVPI Versatile Probe Interface. 2. Aux In. Trigger level range is adjustable from +8 V to –8 V. The maximum input voltage is 450V peak, 300V RMS. Input resistance is 1 MΩ ± 1% in parallel with 11.5 pF ±2 pF. 3. PROBE COMP. Square wave signal source to compensate probes. Output voltage: 0 – 2.5V, amplitude ± 1% behind 1 kΩ ±2%. Frequency: 1 kHz. 4. Ground. 5. Application Module Slots. 72 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument Side-Panel Connector 1. Ground strap connector. This is a receptacle for a grounding strap. DPO3000 Series Oscilloscopes User Manual 73 Get Acquainted with the Instrument Rear-Panel Connectors 1. Cal. This is for use by authorized service personnel only. 2. Aux Out. Use this output to synchronize other test equipment with your oscilloscope. A LOW to HIGH transition indicates that the trigger occurred. The logic level for Vout (HI) is ≥3.25V open circuit; ≥2.2 V into a 50Ω load to ground. The logic level for Vout (LO) is ≤0.4 V into a load of ≤4 mA; ≤0.2 V into a 50Ω load to ground. 3. Probe Power. Use this port to provide auxiliary power for TekVPI probes, when needed. 4. Video Out. Use the Video Out port (DB-15 female connector) to show the oscilloscope display on an external monitor or projector. 5. LAN. Use the LAN (Ethernet) port (RJ-45 connector) to connect the oscilloscope to a 10/100 Base-T local area network. 74 DPO3000 Series Oscilloscopes User Manual Get Acquainted with the Instrument 6. Device. Use the USB 2.0 High speed device port to control the oscilloscope through USBTMC or GPIB with a TEK-USB-488 Adapter. The USBTMC protocol allows USB devices to communicate using IEEE488 style messages. This lets you run your GPIB software applications on USB hardware. 7. Host. Use the USB 2.0 Full speed host ports (one on the rear-panel and one on the front) to take advantage of USB flash drives, keyboards, and printers. 8. Power input. Attach to an AC power line with integral safety ground. (See page 8, Operating Considerations.) DPO3000 Series Oscilloscopes User Manual 75 Acquire the Signal Acquire the Signal This section describes concepts of and procedures for setting up the oscilloscope to acquire the signal as you want it to. Setting Up Analog Channels Use front-panel buttons and knobs to set up your instrument to acquire signals using the analog channels. 1. Connect the P6139A or TekVPI probe to the input signal source. 76 DPO3000 Series Oscilloscopes User Manual Acquire the Signal 2. Push Default Setup. 3. Select the input channel by pushing the front-panel buttons. NOTE. If you are using a probe that does not supply probe encoding, set the attenuation (probe factor) on the oscilloscope vertical menu for the channel to match the probe. 4. Push Autoset. DPO3000 Series Oscilloscopes User Manual 77 Acquire the Signal 5. Push the desired channel button. Then adjust the vertical position and scale. 6. Adjust the horizontal position and scale. The horizontal position determines the number of pretrigger and posttrigger samples. The horizontal scale determines the size of the acquisition window relative to the waveform. You can scale the window to contain a waveform edge, a cycle, several cycles, or thousands of cycles. 78 DPO3000 Series Oscilloscopes User Manual Acquire the Signal Quick Tip Use the zoom feature to see multiple cycles of your signal in the upper part, and a single cycle in the lower part of the display. (See page 189, Using Wave Inspector to Manage Long Record Length Waveforms.) Labeling Channels and Buses You can add a label to the channels and buses shown on the display for easy identification. The label is placed on the waveform baseline indicator in the left side of the screen. The label can have up to 32 characters. To label a channel or bus, follow these steps: 1. Push a front panel button for an input channel or a bus. DPO3000 Series Oscilloscopes User Manual 79 Acquire the Signal 2. Push a lower-bezel Label button to create a label, such as for channel 1 or B1. Label 3. Push Select Preset Label to view a list of labels. Select Preset Label 4. Turn multipurpose knob b to scroll through the list to find a suitable label. You can edit the label after you insert it if necessary. 80 DPO3000 Series Oscilloscopes User Manual Acquire the Signal 5. Push Insert Preset Label to add the label. Insert Preset Label If you are using a USB keyboard, use the arrow keys to position the insertion point and edit the inserted label, or type in a new label. (See page 48, Connecting a USB Keyboard to Your Oscilloscope.) 6. If you do not have a USB keyboard connected, push the side- and lower-bezel arrow keys to position the insertion point. DPO3000 Series Oscilloscopes User Manual 81 Acquire the Signal 7. Turn multipurpose knob a to scroll through the list of letters, numbers, and other characters to find the character in the name that you want to enter. ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789_=+-!@#$%^&*(){}<>/~’”\|:,.? 8. Push Select or Enter Character to let the oscilloscope know that you have picked the proper character to use. You can use the lower-bezel buttons to edit the label as needed. 82 Enter Character Back Space Delete Clear DPO3000 Series Oscilloscopes User Manual Acquire the Signal 9. Continue scrolling and pushing Select until you have entered all the desired characters. For another label, push the side- and lower-bezel arrow keys to reposition the insertion point. 10. Push Display Labels and select On to see the label. Display Labels On| Off Using the Default Setup To return the oscilloscope to its default settings: 1. Push Default Setup. DPO3000 Series Oscilloscopes User Manual 83 Acquire the Signal 2. If you change your mind, push Undo Default Setup to undo the last default setup. Undo Default Setup Using Autoset Autoset adjusts the instrument (acquisition, horizontal, trigger, and vertical controls) such that it displays four or five waveform cycles for analog channels with the trigger near the midlevel, and ten cycles for digital channels. Autoset works with both the analog and digital channels. 1. Connect the analog probe, and then select the input channel. (See page 76, Setting Up Analog Channels.) 2. Push Autoset to execute an Autoset. 84 DPO3000 Series Oscilloscopes User Manual Acquire the Signal 3. If desired, push Undo Autoset to undo the last Autoset. Undo Autoset Quick Tips To position the waveform appropriately, Autoset may change the vertical position. Autoset always sets vertical offset to 0 V. If you use Autoset when no channels are displayed, the instrument turns on channel one (1) and scales it. If you use Autoset and the oscilloscope detects a video signal, the oscilloscope automatically sets the trigger type to video and makes other adjustments to display a stable video signal. Acquisition Concepts Before a signal can be displayed, it must pass through the input channel where it is scaled and digitized. Each channel has a dedicated input amplifier and digitizer. Each channel produces a stream of digital data from which the instrument extracts waveform records. DPO3000 Series Oscilloscopes User Manual 85 Acquire the Signal Sampling Process Acquisition is the process of sampling an analog signal, converting it into digital data, and assembling it into a waveform record, which is then stored in acquisition memory. Input signal Sampled points Digital values Real-Time Sampling DPO3000 series oscilloscopes use real-time sampling. In real-time sampling, the instrument digitizes all of the points it acquires using a single trigger event. Record points Sampling rate 86 DPO3000 Series Oscilloscopes User Manual Acquire the Signal Waveform Record The instrument builds the waveform record through use of the following parameters: Sample interval: The time between recorded sample points. Adjust this by turning the Horizontal Scale knob or changing the record length with the bezel buttons. Record length: The number of samples required to fill a waveform record. Set this by pushing the Acquire button and using the resulting lower- and side-bezel menus. Trigger point: The zero time reference in a waveform record. It is shown on the screen by an orange T. DPO3000 Series Oscilloscopes User Manual 87 Acquire the Signal Horizontal position: When Delay Mode is on, this is the time from the trigger point to the expansion point. Adjust this by turning the Horizontal Position knob. Use a positive time to acquire the record after the trigger point. Use a negative time to acquire it before the trigger point. Expansion point: The point that the horizontal scale expands and contracts around. It is shown by an orange triangle. How the Analog Acquisition Modes Work Sample mode retains the first sampled point from each acquisition interval. Sample is the default mode. 88 DPO3000 Series Oscilloscopes User Manual Acquire the Signal Peak Detect mode uses the highest and lowest of all the samples contained in two consecutive acquisition intervals. This mode only works with real-time, noninterpolated sampling and is useful for catching high frequency glitches. Hi Res mode calculates the average of all the samples for each acquisition interval. This mode only works with real-time, noninterpolated sampling. Hi-Res provides a higher-resolution, lower-bandwidth waveform. Envelope mode finds the highest and lowest record points over all acquisitions. Envelope uses Peak Detect for each individual acquisition. Average mode calculates the average value for each record point over a user-specified number of acquisitions. Average uses Sample mode for each individual acquisition. Use average mode to reduce random noise. DPO3000 Series Oscilloscopes User Manual 89 Acquire the Signal Changing the Acquisition Mode, Record Length, and Delay Time Use this procedure to change the acquisition mode. 1. Push Acquire. 2. Push Mode. 90 Mode Sample Record Length 10k Delay On |Off Set Horiz. Position to 10% Waveform Display XY Display Off DPO3000 Series Oscilloscopes User Manual Acquire the Signal 3. Then choose the acquisition mode from the side-bezel menu. You can chose from: Sample, Peak Detect, Hi Res, Envelope, or Average. NOTE. Peak Detect and Hi Res modes take advantage of sample points that the oscilloscope would have discarded at lower sweep speeds. Therefore, these modes only work when the current sample rate is less than the maximum possible sample rate. As soon as the oscilloscope starts to acquire at the maximum sample rate, then the Peak Detect, Hi Res and Sample modes all look the same. You can control the sample rate by setting the Horizontal scale and the Record Length. Acquisition Mode Sample Peak Detect Hi Res Envelope Average 16 DPO3000 Series Oscilloscopes User Manual 91 Acquire the Signal 4. If you chose Average, turn multipurpose knob a to set the number of waveforms to average over. 5. Push Record Length. 6. Push the side-bezel menu, record length button. 10k points Choose among: 1000, 10 k, 100 k, 1 M, and 5 M points. 7. Push the lower-bezel Delay button to select On when you want to delay the acquisition relative to the trigger event. 92 DPO3000 Series Oscilloscopes User Manual Acquire the Signal With Delay set to On, turn the Horizontal Position knob counterclockwise to increase the delay. The trigger point will move to the left and ultimately outside of the acquired waveform. Then you can adjust the Horizontal Scale knob to acquire more detail around the area of interest at the center of the screen. When this delay is on, the trigger point separates from the horizontal expansion point. The horizontal expansion point stays at the center of the screen. The trigger point can move off the screen. When this happens, the trigger marker turns to point in the direction of the trigger point. Use the delay feature when you want to acquire waveform detail that is separated from the trigger event by a significant interval of time. For example, you can trigger on a sync pulse that occurs once every 10 ms and then look at high-speed signal characteristics that occur 6 ms after the sync pulse. When the delay feature is set to Off, the expansion point is tied to the trigger point so that scale changes are centered around the trigger point. Using Roll Mode Roll mode gives a display similar to a strip chart recorder for low-frequency signals. Roll mode lets you see acquired data points without waiting for the acquisition of a complete waveform record. Roll mode is enabled when the trigger mode is auto and the horizontal scale is set to 40 ms/div or slower. DPO3000 Series Oscilloscopes User Manual 93 Acquire the Signal Quick Tips Switching to Envelope or Average acquisition mode, using math waveforms, turning on a bus, or switching to Normal trigger will disable Roll mode. Roll mode is disabled when you set the horizontal scale to 20 ms per division or faster. Push Run/Stop to halt Roll mode. 94 DPO3000 Series Oscilloscopes User Manual Acquire the Signal Setting Up a Serial Bus Your oscilloscope can decode and trigger on: I2C and SPI serial buses if the DPO3EMBD application module is installed CAN and LIN serial buses if the DPO3AUTO application module is installed RS-232, RS-422, RS-485, and UART serial buses if the DPO3COMP application module is installed (See page 24, Application Module Free Trial.) Using Buses in Two Steps To quickly use serial bus triggering: 1. Push B1 or B2 and enter parameters of the bus to trigger on. You can separately use B1 and B2 to view two different buses. DPO3000 Series Oscilloscopes User Manual 95 Acquire the Signal 2. Push Trigger Menu and enter trigger parameters. (See page 114, Choosing a Trigger Type.) You can display bus information without triggering on the bus signal. Setting Up Bus Parameters NOTE. For all serial bus sources, use channels 1 through 4. To set up bus parameters: 1. Push B1 or B2 to bring up the lower-bezel bus menu. 96 DPO3000 Series Oscilloscopes User Manual Acquire the Signal 2. Push Bus. Turn multipurpose knob a to scroll through the bus type side menu until you select the desired bus: I2C, SPI, CAN, RS-232, or LIN. The actual menu items shown will depend on your model oscilloscope and the application modules installed. I2C SPI RS-232 CAN LIN 3. Push Define Inputs. B1 CAN Define Inputs Thresholds 4. If you selected I2C above, push Define Inputs and the desired side-bezel menu choices. You can assign the predefined SCLK Input or SDA Input to any channel. B1 I2C Define Inputs Thresholds DPO3000 Series Oscilloscopes User Manual B1 Label CAN Include R/W in Address No Bus Display Event Table B1 Label I2C Bus Display Event Table 97 Acquire the Signal 5. For I2C, push Include R/W in Address and then push the desired side-bezel button for Yes or No. This control determines how the oscilloscope shows the I2C addresses in bus decode traces, cursor readouts, Event Table listings, and trigger settings. If you select Yes, then 7-bit addresses are displayed as eight bits, where the eighth bit (LSB) is the R/~W bit. 10-bit addresses are displayed as 11 bits. The first two bits are the two MSBs of the address. The next bit is the R/~W bit. The last eight bits are the eight LSBs of the address. (In the physical layer of the I2C protocol, 10 bit I2C addresses are preceded by the five bit code, 11110. The oscilloscope never includes these five bits in address readouts.) If you select No, then 7-bit addresses are displayed as seven bits and 10-bit addresses are displayed as ten bits. 98 DPO3000 Series Oscilloscopes User Manual Acquire the Signal 6. If you selected SPI above, push Configure and the desired side-bezel menu choice. Bus SPI Define Inputs Thresholds Configure B1 Label SPI Bus Display Event Table 7. If you selected CAN above, push Bit Rate and turn multipurpose knob a to select the desired bit rate. Bus CAN Define Inputs Thresholds Bit Rate 500 Kbps B1 Label CAN Bus Display Event Table 8. If you selected RS-232 above, push Configure. Bus RS-232 Define Inputs Thresholds Configure 9600-8-N B1 Label RS-232 Bus Display Event Table You can set the polarity for the SCLK, SS, MOSI, or MISO signals. Active High means when a signal is greater than the threshold value, it is considered active. Active Low means when the signal is lower than the threshold value, it is considered active. Use the side-bezel menu to configure the bus. Use Normal polarity to trigger on RS-232 signals and Inverted polarity to trigger on RS-422, 485, and UART signals. DPO3000 Series Oscilloscopes User Manual 99 Acquire the Signal Push Bit Rate, and turn multipurpose knob a to select the appropriate bit rate. Bit Rate 9600 bps Data Bits 7 |8 Parity None Odd Even RS-232 decoding displays a stream of bytes. You can organize the stream into packets with an end-of-packet character. Packets On |Off Turn multipurpose knob a to select an end-of-packet character. End of Packet 0A (Linefeed) 9. If you selected LIN above, push Configure. Bus LIN Define Inputs Thresholds Configure B1 Label LIN Bus Display Event Table Use the side-bezel menu to configure the bus. 100 DPO3000 Series Oscilloscopes User Manual Acquire the Signal Push Bit Rate, and turn multipurpose knob a to select the appropriate bit rate. Bit Rate 2400 bps Push LIN Standard, and turn multipurpose knob a to select the appropriate standard. LIN Standard v1.x Push Include Parity Bits with Id to select whether or not to include parity bits. Include Parity Bits with Id Yes No DPO3000 Series Oscilloscopes User Manual 101 Acquire the Signal 10. Push Bus Display and use the side-bezel menu to define how to display that bus. Push Bus to display packet level information decoded for easy visual inspection, much like what you would see on a logic analyzer. Push Bus and Waveforms to display both views of the signal. Push the desired side-bezel menu choice to display the bus data in hex, binary, decimal (for LIN), or ASCII (for RS-232) format. Bus Bus and Waveforms Hex Binary ASCII 102 DPO3000 Series Oscilloscopes User Manual Acquire the Signal 11. Push Event Table and select On to display a list of I2C, SPI, CAN, or LIN bus packets with timestamps. Event Table On | Off Save Event Table For an RS-232 bus, the table lists decoded bytes, or packets. Push Save Event Table to save the event table data in a .csv (spreadsheet) formatted file on the currently selected storage device. Bus information example: Bus and waveforms example: DPO3000 Series Oscilloscopes User Manual 103 Acquire the Signal Saved event table example: I2C, SPI, CAN, and LIN event tables display one line for each packet. RS-232 event tables display one line for each 7- or 8-bit byte when Packets are set to Off. RS-232 event tables display one line for each packet when Packets are set to On. 12. Push B1 or B2 and turn multipurpose knob a to move the bus display up or down on the screen. To trigger on serial bus conditions, refer to Triggering on Buses. (See page 121, Triggering on Buses.) 104 DPO3000 Series Oscilloscopes User Manual Acquire the Signal Physical Layer Bus Activity Oscilloscope waveform traces from channels 1 to 4 and the traces you see when you choose to display a bus as Bus and Waveforms always show the physical layer bus activity. In the physical layer display, bits that were transmitted earlier are to the left, and bits that were transmitted later are to the right. I2C and CAN buses transmit the MSB (most significant bit) first SPI buses do not specify a bit order RS-232 and LIN buses transmit the LSB (least significant bit) first NOTE. The oscilloscope displays the decode traces and event tables for all buses with the MSB on the left and LSB on the right. For example, an RS-232 signal (after the start bit) might be high, high, high, low, high, low, low, and high. Since the RS-232 protocol uses high for zero and low for one, this value would be 0001 0110. Since the decode displays the MSB first, the oscilloscope reverses the order of the bits and displays 0110 1000. If the bus display is set to hex, the value displays as 68. If the bus display is set to ASCII, the value displays as h. DPO3000 Series Oscilloscopes User Manual 105 Acquire the Signal RS-232 If you defined an end-of-packet character to use for RS-232 decoding, the stream of bytes will be displayed as packets. When decoding an RS-232 bus in ASCII mode, a large dot indicates that the value represents a character outside the printable ASCII range. 106 DPO3000 Series Oscilloscopes User Manual Trigger Setup Trigger Setup This section contains concepts and procedures for setting up the oscilloscope to trigger on your signal. Triggering Concepts Trigger Event The trigger event establishes the time-reference point in the waveform record. All waveform record data is located in time with respect to that point. The instrument continuously acquires and retains enough sample points to fill the pretrigger portion of the waveform record. That is the part of the waveform that is displayed before, or to the left of, the triggering event on screen. When a trigger event occurs, the instrument starts acquiring samples to build the posttrigger portion of the waveform record, that is, the part displayed after or to the right of the trigger event. After a trigger is recognized, the instrument will not accept another trigger until the acquisition is complete and the holdoff time has expired. DPO3000 Series Oscilloscopes User Manual 107 Trigger Setup Untriggered display Triggered display Trigger Modes The trigger mode determines how the instrument behaves in the absence of a trigger event: Normal trigger mode enables the instrument to acquire a waveform only when it is triggered. If no trigger occurs, the last waveform record acquired remains on the display. If no last waveform exists, no waveform is displayed. Auto trigger mode enables the instrument to acquire a waveform even if a trigger does not occur. Auto mode uses a timer that starts when the acquisition is started, and the pretrigger information is obtained. If a trigger event is not detected before the timer times out, the instrument forces a trigger. The length of time it waits for a trigger event depends on the time base setting. Auto mode, when forcing triggers in the absence of valid triggering events, does not synchronize the waveform on the display. The waveform will appear to roll across the screen. If valid triggers occur, the display will become stable. 108 DPO3000 Series Oscilloscopes User Manual Trigger Setup You can also force the instrument to trigger by pushing the front-panel Force Trig button. Trigger Holdoff Adjust holdoff to obtain stable triggering when the instrument is triggering on undesired trigger events. Trigger holdoff can help stabilize triggering, since the oscilloscope does not recognize new triggers during the holdoff time. When the instrument recognizes a trigger event, it disables the trigger system until acquisition is complete. In addition, the trigger system remains disabled during the holdoff period that follows each acquisition. DPO3000 Series Oscilloscopes User Manual Holdoffs 109 Trigger Setup Trigger Coupling Trigger coupling determines what part of the signal is passed to the trigger circuit. Edge triggering can use all available coupling types: DC, AC, Low Frequency Rejection, High Frequency Rejection, and Noise Rejection. Sequence (B) triggering does not provide AC coupling. Other trigger types use DC coupling only. Horizontal Position When Delay Mode is on, use horizontal position to acquire waveform detail in a region that is separated from the trigger location by a significant interval of time. 110 DPO3000 Series Oscilloscopes User Manual Trigger Setup 1. Adjust the position (delay) time by rotating the Horizontal Position knob. 2. Turn horizontal SCALE to acquire the detail that you need around the position (delay) expansion point. The part of the record that occurs before the trigger is the pretrigger portion. The part that occurs after the trigger is the posttrigger portion. Pretrigger data can help you troubleshoot. For example, to find the cause of an unwanted glitch in your test circuit, you can trigger on the glitch and make the pretrigger period large enough to capture data before the glitch. By analyzing what happens before the glitch, you may uncover information that helps you find the source of the glitch. Alternatively, to see what is happening in your system as a result of the trigger event, make the posttrigger period large enough to capture data after the trigger. DPO3000 Series Oscilloscopes User Manual 111 Trigger Setup Slope and Level The slope control determines whether the instrument finds the trigger point on the rising or the falling edge of a signal. The level control determines where on that edge the trigger point occurs. The oscilloscope provides a long horizontal bar or bars across the graticule to temporarily show the trigger level. 112 DPO3000 Series Oscilloscopes User Manual Trigger Setup 1. Turn the front-panel Trigger Level knob to adjust the trigger level without going to a menu. Push the knob to quickly set the trigger level to the midpoint of the waveform. DPO3000 Series Oscilloscopes User Manual 113 Trigger Setup Choosing a Trigger Type To select a trigger: 1. Push Trigger Menu. 114 DPO3000 Series Oscilloscopes User Manual Trigger Setup 2. Push Type to bring up the Trigger Type side-bezel menu. NOTE. The bus trigger requires use of the DPO3EMBD, DPO3AUTO, or DPO3COMP application module. Trigger Type Sequence (B Trigger) Pulse Width Runt Logic Setup & Hold Rise/Fall Time Video Bus 3. Turn multipurpose knob a to select the desired trigger type. DPO3000 Series Oscilloscopes User Manual 115 Trigger Setup 4. Complete the trigger setup using the lower-bezel menu controls displayed for the trigger type. The controls to set up the trigger vary depending on the trigger type. Type Edge Source 1 Coupling DC Slope Level 100 mV Mode Auto & Holdoff Selecting Triggers Trigger Type 116 Trigger Conditions Edge Trigger on a rising or falling edge, as defined by the slope control. Coupling choices are DC, AC, LF Reject, HF Reject, and Noise Reject. Edge triggers are the simplest and most commonly used trigger type, with both analog and digital signals. An edge trigger event occurs when the trigger source passes through a specified voltage level in the specified direction. DPO3000 Series Oscilloscopes User Manual Trigger Setup Trigger Type Trigger Conditions Sequence (B Trigger) Combine an edge A Event (Main) trigger with the B Event (Delayed) trigger to capture more complex signals. (See page 131, Using Sequence Trigger, A (Main) and B (Delayed).) Time. After the A Event occurs, the trigger system waits the specified amount of time, and then looks for the B Event before triggering and displaying the waveform. Events. After the A Event occurs, the trigger system looks for a specified number of B Events before triggering and displaying the waveform. Pulse Width DPO3000 Series Oscilloscopes User Manual Trigger on pulses that are less than, greater than, equal to, or not equal to a specified time. You can trigger on positive or negative pulses. Pulse width triggers are primarily used on digital signals. 117 Trigger Setup Trigger Type Runt Trigger on a pulse amplitude that crosses one threshold but fails to cross a second threshold before recrossing the first. You can detect positive or negative (or either) runts, or only those wider than, less than, greater than, equal to, or not equal to a specified width. Runt triggers are primarily used on digital signals. Logic 118 Trigger Conditions Trigger when all channels transition to the specified state. Use multipurpose knob a to select a channel. Push the appropriate side-bezel button to set that channel’s state to High (H), Low (L), or Don’t Care (X). Use the Clock side-bezel button to enable clocked (state) triggering. You can have at most a single clock channel. Push the Clock Edge bottom bezel button to change the polarity of the clock edge. Turn off clocked triggering and return to unclocked (pattern) triggering by selecting the clock channel and setting it to high, low, or don’t care. For unclocked triggering, by default, triggering occurs when the selected condition goes true. You can also select triggering when the condition goes false, or time-qualified triggering. DPO3000 Series Oscilloscopes User Manual Trigger Setup Trigger Type Trigger Conditions Setup and Hold Trigger when a logic data input changes state inside of the setup or hold time relative to a clock edge. Setup is the amount of time that data should be stable and not change before a clock edge occurs. Hold is the time that data should be stable and not change after a clock edge occurs. Use the Clock side-bezel button to select the clock channel. Use the Select control, Data, and Not used buttons to select one or more channels you want to monitor for setup and hold violations. NOTE. Optimum Setup and Hold trigger performance is achieved by using only analog channels or only digital channels. Rise/Fall Time DPO3000 Series Oscilloscopes User Manual Trigger on rise and fall times. Trigger on pulse edges that traverse between two thresholds at faster or slower rates than the specified time. Specify pulse edges as positive, negative, or either. 119 Trigger Setup Trigger Type Video Trigger on specified fields or lines of a composite video signal. Only composite signal formats are supported. Trigger on NTSC, PAL, or SECAM. Works with Macrovision signals. With the DPO3VID module, trigger on a variety of HDTV video standard signals, as well as custom (non-standard) bilevel and trilevel video signals with 3 to 4,000 lines. Bus 120 Trigger Conditions Trigger on various bus conditions. I2C requires a DPO3EMBD module. SPI requires a DPO3EMBD module. CAN requires a DPO3AUTO module. RS-232, RS-422, RS-485, and UART require a DPO3COMP module. LIN requires either a DPO3AUTO module. (See page 24, Application Module Free Trial.) DPO3000 Series Oscilloscopes User Manual Trigger Setup Triggering on Buses You can use your oscilloscope to trigger on CAN, LIN, I2C, SPI, RS-232, RS-422, RS-485, and UART buses, if you have the appropriate DPO3AUTO, DPO3EMBD, or DPO3COMP application module installed. The oscilloscope can display both physical layer (as analog waveforms) and protocol level information (as digital and symbolic waveforms). To set up the bus trigger: 1. If you have not already defined your bus using the front-panel B1 and B2 buttons, do so now. (See page 95, Setting Up a Serial Bus.) 2. Push Trigger Menu. DPO3000 Series Oscilloscopes User Manual 121 Trigger Setup 3. Push Type. Type Bus Source Bus B1 (I2C) Trigger On Address Address 07F Direction Write Mode Auto & Holdoff 4. Turn multipurpose knob a to scroll through the trigger type side menu until you select Bus. 5. Push Source Bus and turn multipurpose knob a to scroll through the source bus side menu until you select the bus that you want to trigger on. 122 B1 (I2C) B2 (CAN) DPO3000 Series Oscilloscopes User Manual Trigger Setup 6. Push Trigger On and turn multipurpose knob a to scroll through the side-bezel menu until you select the desired trigger on feature. If you are using the I2C bus trigger, you can trigger on Start, Repeated Start, Stop, Missing Ack, Address, Data, or Address/Data. If you are using the SPI bus trigger, you can trigger on SS Active, MOSI, MISO, or MOSI & MISO. If you are using the CAN bus trigger, you can trigger on Start of Frame, Type of Frame, Identifier, Data, Id & Data, End of Frame, and Missing Ack. If you are using the RS-232 bus trigger, you can trigger on Tx Start Bit, Rx Start Bit, Tx End of Packet, Rx End of Packet,Tx Data, or Rx Data. If you are using the LIN bus trigger, you can trigger on Sync, Identifier, Data, Id & Data,Wakeup Frame, Sleep Frame, or Error. DPO3000 Series Oscilloscopes User Manual 123 Trigger Setup 7. If you are setting up an I2C trigger and have made a Trigger On selection of Address or Address/Data, push the lower-bezel Address button to access the I2C Address side-bezel menu. Push the side-bezel Addressing Mode button and select 7 bit or 10 bit. Push the side-bezel Address button. Enter the address parameters of interest with multipurpose knobs a and b. Then push the lower-bezel menu Direction button and select the direction of interest: Read, Write, or Read or Write. 124 DPO3000 Series Oscilloscopes User Manual Trigger Setup If you have made a Trigger On selection of Data or Address/Data, push the lower-bezel Data button to access the I2C Data side-bezel menu. Push the Number of Bytes button and enter the number of bytes with multipurpose knob a. Push the side-bezel Addressing Mode button and select 7 bit or 10 bit. Push the side-bezel Data button. Enter the data parameters of interest with multipurpose knobs a and b. For more information on the I2C address formats, refer to item 5 under Setting Up Bus Parameters. DPO3000 Series Oscilloscopes User Manual 125 Trigger Setup 8. If you are setting up an SPI trigger and have made a Trigger On selection of MOSI or MISO, push the lower-bezel Data button, push the side-bezel MOSI (or MISO) button, and enter the data parameters of interest with multipurpose knobs a and b. Then push the Number of Bytes button and enter the number of bytes with multipurpose knob a. If you select MOSI & MISO, push the lower-bezel Data button and enter the parameters of interest in the side-bezel menus. 126 DPO3000 Series Oscilloscopes User Manual Trigger Setup 9. If you are setting up a CAN trigger and have made a Trigger On selection of Type of Frame, push the lower-bezel Frame Type button, and select Data Frame, Remote Frame, Error Frame, or Overload Frame. If you have made a Trigger On selection of Identifier, push the lower-bezel Identifier button, and select a Format. Then push the Identifier side-bezel button, and enter a binary or hex value with multipurpose knobs a and b. Push the lower-bezel menu Direction button and select the direction of interest: Read, Write, or Read or Write. If you have made a Trigger On selection of Data. Push the lower-bezel Data button and enter the parameters of interest with multipurpose knobs a and b. DPO3000 Series Oscilloscopes User Manual 127 Trigger Setup 10. If you are setting up an RS-232 trigger and have made a Trigger On selection of Tx Data or Rx Data, push the lower-bezel Data button. Push the Number of Bytes button and enter the number of bytes with multipurpose knob a. Push the side-bezel Data button, and enter the parameters of interest with multipurpose knobs a and b. 11. If you are setting up an LIN trigger and have made a Trigger On selection of Identifier, Data, or Identifier & Data, push the lower-bezel Identifier or Data buttons and enter the parameters of interest on the resulting side-bezel menu. If you have made a Trigger On selection of Error, push the lower-bezel Error Type button and enter the parameters of interest on the resulting side-bezel menu. I2C, SPI, CAN, and LIN Bus Trigger Data Matching Rolling window byte matching for I2C and SPI. To use a rolling window to trigger on data, you define the number of bytes to match. Then the oscilloscope uses a rolling window to find any match within a packet, with the window rolling one byte at a time. 128 DPO3000 Series Oscilloscopes User Manual Trigger Setup For example, if the number of bytes is one, the oscilloscope will attempt to match the first byte, second byte, third, and so on within the packet. If the number of bytes is two, the oscilloscope will try to match any two consecutive bytes, such as one and two, two and three, three and four, and so on. If the oscilloscope finds a match, it will trigger. Specific byte matching (non-rolling window matching for a specific position in the packet) for I2C, SPI, and CAN. You can trigger on a specific byte for I2C, SPI and CAN in several ways: For I2C and SPI, enter the number of bytes to match the number of bytes in the signal. Then use don’t cares (X) to mask the bytes that you are not interested in. For I2C, push the lower-bezel Trigger On to trigger on Address/Data. Push Address. On the side-bezel menu, push Address, and rotate multipurpose knobs a and b as needed. Set the address to don’t cares (X) if you want to mask the address. The data will be matched starting at the first byte without using a rolling window. For CAN, triggering occurs when the user-selected data input matches the data and qualifier in the signal starting at the first byte. Set the number of bytes to match the number of bytes of interest. Use the data qualifier to perform: =, !=, <, >, >=, and <= operations. Triggering on identifier and data always matches the identifier and data selected by the user, with the data starting at the first byte. No rolling window is used. RS-232 Bus Trigger Data Matching You can trigger on a specific data value for RS-232 bytes. If you defined an end-of-packet character to use for RS-232 bus decoding, you can use the same end-of-packet character as a data value for trigger data matching. To do so, choose the Tx End of Packet or the Rx End of Packet character as the Trigger On selection. DPO3000 Series Oscilloscopes User Manual 129 Trigger Setup Checking Trigger Settings To quickly determine the settings of some key trigger parameters, check the Trigger readout at the bottom of the display. The readouts differ for edge and the advanced triggers. 1. Trigger source = channel 1. 2. Trigger slope = rising. Edge trigger readout 3. Trigger level = 0.00 V. 130 DPO3000 Series Oscilloscopes User Manual Trigger Setup Using Sequence Trigger, A (Main) and B (Delayed) Combine an edge A Event (Main) trigger with the B Event (Delayed) trigger to capture more complex signals. After the A Event occurs, the trigger system looks for the B Event before triggering and displaying the waveform. A and B triggers can (and typically do) have separate sources. Use the Edge trigger menu to set up the A trigger first. Then, to use the B trigger: 1. Push Trigger Menu. 2. Push Type. 3. Turn multipurpose knob a to select a trigger type of Sequence (B Trigger). This brings up the Sequence (B Trigger) menu. DPO3000 Series Oscilloscopes User Manual 131 Trigger Setup 4. Push B Trigger After A. Push a side-bezel button to select sequencing the B trigger after the A as Time or as Events. Type Sequence (B Trigger) Source 1 Coupling DC Slope Level 0.00 V B Trigger After A Time Mode Auto & Holdoff Time (a) 8 ns B Events 1 Set to Minimum 5. Set the other Sequence Trigger parameters in the related side- and lower-bezel menus. 132 DPO3000 Series Oscilloscopes User Manual Trigger Setup B Trigger After Delay Time The A trigger arms the instrument. Posttrigger acquisition starts on the first B edge after the trigger delay time. DPO3000 Series Oscilloscopes User Manual 133 Trigger Setup Trigger on B Events The A trigger arms the instrument. Posttrigger acquisition starts on the nth B event. Quick Tips B-trigger delay time and horizontal position are independent functions. When you establish a trigger condition using either the A trigger alone or the A and B triggers together, you can also use the horizontal position control to delay the acquisition by an additional amount. When using the B trigger, the A and B trigger types can only be Edge. 134 DPO3000 Series Oscilloscopes User Manual Trigger Setup Starting and Stopping an Acquisition After you have defined the acquisition and trigger parameters, start the acquisition with Run/Stop or Single. Push Run/Stop to start acquisitions. The oscilloscope acquires repeatedly until you push the button again to stop the acquisition. Push Single to take a single acquisition. Single sets the trigger mode to Normal for the single acquisition. DPO3000 Series Oscilloscopes User Manual 135 Display Waveform Data Display Waveform Data This section contains concepts and procedures for displaying the acquired waveform. Adding and Removing a Waveform 1. To add or remove a waveform from the display, push the corresponding front-panel channel button. You can use the channel as a trigger source whether or not it is displayed. Setting the Display Style and Persistence 1. To set the display style, push Acquire. 136 DPO3000 Series Oscilloscopes User Manual Display Waveform Data 2. Push Waveform Display. DPO3000 Series Oscilloscopes User Manual Mode Sample Record Length 10k Delay On |Off Set Horiz. Position to 10% Waveform Display XY Display On 137 Display Waveform Data 3. Push Dots Only from the side-bezel menu. Dots on will display the waveform record points as dots on the screen. Dots off connects the dots with vectors. Waveform Display Dots Only On |Off 4. Push Persist Time, and turn multipurpose knob a to have waveform data remain on screen for a user-specified amount of time. Persist Time (a) Auto 5. Push Set to Auto to have the oscilloscope automatically determine a persistence time for you. Set to Auto 6. Push Clear Persistence to reset the persistence information. Clear Persistence 7. To display the amplitude from one waveform against the amplitude from another, push XY Display. Then push Triggered XY from the side menu. A data point from the first waveform specifies the horizontal location while the corresponding data point from the second waveform specifies the vertical location for each displayed point. 138 DPO3000 Series Oscilloscopes User Manual Display Waveform Data Quick Tips Variable persistence accumulates record points for a specified time interval. Each record point decays independently according to the time interval. Use variable persistence for displaying infrequently appearing signal anomalies, such as glitches. Infinite persistence continuously accumulates record points until you change one of the acquisition display settings. Use infinite persistence for displaying unique signal anomalies, such as glitches. The XY Display mode graphs the data in fixed pairs of waveforms against one another. You can use CH1 versus CH2, and REF1 versus REF2. On four-channel models, you can also use CH3 versus CH4, and REF3 versus REF4. When the XY Display is on, an upper window appears that displays data versus time. Setting the Graticule Style 1. To set the graticule style, push Utility. 2. Push Utility Page. DPO3000 Series Oscilloscopes User Manual Utility Page 139 Display Waveform Data 3. Turn multipurpose knob a and select Display. 4. Push Graticule from the lower-bezel menu. 140 Display Utility Page Display Backlight Intensity High Graticule Full Screen Annotation DPO3000 Series Oscilloscopes User Manual Display Waveform Data 5. Select the desired style from the resulting side-bezel menu. Use the Full graticule for quick estimates of waveform parameters. Use the Grid graticule for full-screen measurements with cursors and automatic readouts when cross hairs are not needed. Use the Cross Hair graticule for making quick estimates of waveforms while leaving more room for automatic readouts and other data. Use the Frame graticule with automatic readouts and other screen text when display features are not needed. Quick Tips You can display IRE and mV graticules. To do this, set the trigger type to video and set the vertical scale to 143 mV/division. (The 143 mV/division selection is available in the coarse vertical scale settings for the channel when you set the trigger type to video.) The oscilloscope will automatically display the IRE graticule for NTSC signals, and the mV graticule for other video signals (PAL, SECAM, HDTV, and custom). DPO3000 Series Oscilloscopes User Manual 141 Display Waveform Data Setting the LCD Backlight 1. Push Utility. 2. Push Utility Page. 3. Turn multipurpose knob a and select Display. 4. Push Backlight Intensity. 142 Utility Page Display Utility Page Display Backlight Intensity High Graticule Full Screen Annotation DPO3000 Series Oscilloscopes User Manual Display Waveform Data 5. Select the intensity level from the resulting side-bezel menu. Choices are: High, Medium, and Low. Backlight Intensity High Medium Low Setting Waveform Intensity 1. Push the front-panel Intensity button. This will bring up the intensity readout on the display. DPO3000 Series Oscilloscopes User Manual 143 Display Waveform Data 2. Rotate multipurpose knob a to select the desired waveform intensity. 3. Rotate multipurpose knob b to select the desired intensity for the graticule. 4. Push Intensity again to clear the intensity readout from the display. Scaling and Positioning a Waveform Use the horizontal controls to adjust the time base, adjust the trigger point, and to examine waveform details more closely. You can also use the Wave Inspector Pan and Zoom controls to adjust the display of waveforms. (See page 189, Using Wave Inspector to Manage Long Record Length Waveforms.) 144 DPO3000 Series Oscilloscopes User Manual Display Waveform Data Original waveform Scaled horizontally Positioned horizontally Use the vertical controls to select waveforms, adjust the waveform vertical position and scale, and set input parameters. Push a channel menu button (1, 2, 3, or 4) as many times as needed and the associated menu items to select, add, or remove a waveform. DPO3000 Series Oscilloscopes User Manual 145 Display Waveform Data Original waveform Scaled vertically Positioned vertically Quick Tips Preview. If you change the Position or Scale controls when the acquisition is stopped or when it is waiting for the next trigger, the oscilloscope rescales and repositions the relevant waveforms in response to the new control settings. It simulates what you will see when you next push the RUN button. The oscilloscope uses the new settings for the next acquisition. You may see a clipped waveform if the original acquisition went off the screen. The math waveform, cursors, and automatic measurements remain active and valid when using preview. Setting Input Parameters Use the vertical controls to select waveforms, adjust the waveform vertical position and scale, and set input parameters. 146 DPO3000 Series Oscilloscopes User Manual Display Waveform Data 1. Push a channel menu button 1, 2, 3, or 4 to bring up the vertical menu for the designated waveform. The vertical menu only affects the selected waveform. Pushing a channel button will also select or cancel that waveform selection. 2. Push Coupling repeatedly to select the coupling to use. Use DC coupling to pass both AC and DC components. Coupling Impedance Invert DC| AC 1MΩ| 75Ω 50Ω On |Off Bandwidth Full (1) Label More Use AC coupling to block the DC component and show only the AC signal. Use Ground (GND) to display the reference potential. DPO3000 Series Oscilloscopes User Manual 147 Display Waveform Data 3. Push Impedance repeatedly to select the input impedance to use. Set the input impedance (termination) to 50 Ω, 75 Ω, or 1 MΩ if using DC or Gnd coupling. Input impedance is automatically set to 1 MΩ when using AC coupling. For more information on input impedance, see Quick Tips. (See page 150, Quick Tips.) 4. Push Invert to invert the signal. Select Off for normal operation and On to invert the polarity of the signal in the preamplifier. 5. Push Bandwidth, and select the desired bandwidth from the resulting side-bezel menu. The set choices are: Full and 20 MHz. Additional choices may appear, depending on the probe that you use. Select Full to set the bandwidth to the full oscilloscope bandwidth. Select 20 MHz to set the bandwidth to 20 MHz. 6. Push Label to create a label for the channel. (See page 79, Labeling Channels and Buses.) 148 DPO3000 Series Oscilloscopes User Manual Display Waveform Data 7. Push More to access additional side-bezel menus. 8. Select Fine Scale to enable multipurpose knob a to make fine vertical scale adjustments. Fine Scale Offset Position Probe Setup Deskew 9. Select Offset to enable multipurpose knob a to make vertical offset adjustments. On the side-bezel menu, choose Set to 0 V to set the vertical offset to 0 V. For more information on offset, see Quick Tips. (See page 150, Quick Tips.) DPO3000 Series Oscilloscopes User Manual 149 Display Waveform Data 10. Select Probe Setup to define probe parameters. On the resulting side-bezel menu: Select Voltage or Current to set the probe type for probes that do not have the TekProbe II or TekVPI interface. Use multipurpose knob a to set the attenuation to match the probe. 11. Select Deskew to set the time skew correction for the channel. Turn multipurpose knob a to adjust the time skew (deskew) correction for the probe attached to the selected channel. This shifts acquisition and display of the waveform left or right, relative to the trigger time. Use this to compensate for differences in cable lengths or probe types. Quick Tips Using Probes with the TekProbe II and TekVPI Interfaces. When you attach a probe with the TekProbe II or the TekVPI interface, the oscilloscope sets the channel sensitivity, coupling, and termination resistance automatically to match the probe requirements. Tek Probe II probes require use of the TPA-BNC Adapter. 150 DPO3000 Series Oscilloscopes User Manual Display Waveform Data The Difference Between Vertical Position and Offset. Vertical position is a display function. Adjust the vertical position to place the waveforms where you want to see them. The waveform baseline locations track adjustments made to their positions. When you adjust vertical offset, you see a similar effect, but it is actually quite different. Vertical offset is applied before the oscilloscope preamplifier and can be used to increase the effective dynamic range of the inputs. For example, you can use vertical offset to look at small variations in a large DC voltage. Set the vertical offset to match the nominal DC voltage and the signal appears in the center of the screen. 50 and 75 Ω Protection. If you select 50 Ω or 75 Ω termination, the maximum vertical scale factor is limited to 1 V/div, except that with a 10X probe the scale factor is 10 V. If you apply excessive input voltage, the oscilloscope automatically switches to 1 MΩ termination to protect the internal 50 Ω or 75 Ω termination. For more details, refer to the specifications in the DPO3000 Series Oscilloscopes Technical Reference. Positioning and Labeling Bus Signals Positioning Bus Signals. Push the appropriate front-panel bus button and turn multipurpose knob a to adjust the vertical position of the selected bus. (See page 95, Setting Up a Serial Bus.) 1. Push the appropriate front-panel bus button to select that bus. DPO3000 Series Oscilloscopes User Manual 151 Display Waveform Data 2. Turn multipurpose knob a to adjust the vertical position of the selected bus. Labeling Bus Signals. To label a bus, do the following steps: 1. Push the appropriate front-panel bus button. 2. Push Label. (See page 79, Labeling Channels and Buses.) 152 Bus (B1) Parallel Define Inputs Thresholds (B1) Label Parallel Bus Display Event Table DPO3000 Series Oscilloscopes User Manual Display Waveform Data Annotating the Screen You can add your own text to the screen by doing the following: 1. Push Utility. 2. Push Utility Page. 3. Turn multipurpose knob a and select Display. DPO3000 Series Oscilloscopes User Manual Utility Page Display 153 Display Waveform Data 4. Push Screen Annotation from the resulting lower-bezel menu. Utility Page Display Backlight Intensity High Graticule Full Screen Annotation 5. Push Display Annotation to select On from the side-bezel menu. The annotation window now appears. Position it by turning multipurpose knobs a and b. 6. Push Edit Annotation from the side-bezel menu 7. Turn multipurpose knob a to scroll through the list of letters, numbers, and other characters to select each desired character. Alternatively, use a US-style USB keyboard to type in characters. (See page 48, Connecting a USB Keyboard to Your Oscilloscope.) To reposition the annotated text, press the side-bezel Position button and turn multipurpose knobs a and b, as desired. 154 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Analyze Waveform Data After having properly set up the acquisition, triggering, and display of your desired waveform, you can then analyze the results. Select from features such as cursors, automatic measurements, statistics, math, and FFT. Taking Automatic Measurements To take an automatic measurement: 1. Push Measure. 2. Push Add Measurement. DPO3000 Series Oscilloscopes User Manual Add Measurement Remove Measurement Indicators More Bring Cursors on Screen Configure Cursors 155 Analyze Waveform Data 3. Turn multipurpose knob a to select the specific measurement. If needed, then turn multipurpose knob b to select the channel to measure on. 4. To remove a measurement, push Remove Measurement, turn multipurpose knob a to select the specific measurement, and push OK Remove Measurement on the side-bezel menu. Quick Tips To remove all measurements, select Remove All Measurements. A symbol appears instead of the expected numerical measurement if a vertical clipping condition exists. Part of the waveform is above or below the display. To obtain a proper numerical measurement, turn the vertical scale and position knobs to make all of the waveform appear in the display. 156 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Selecting Automatic Measurements The following tables list each automatic measurement by category: time or amplitude. (See page 155, Taking Automatic Measurements.) Time Measurements Measurement Description Period The time required to complete the first cycle in a waveform or gated region. Period is the reciprocal of frequency and is measured in seconds. Frequency The first cycle in a waveform or gated region. Frequency is the reciprocal of the period; it is measured in hertz (Hz) where one Hz is one cycle per second. Delay The time between the mid reference (default 50%) amplitude point of two different waveforms. See also Phase. Rise Time The time required for the leading edge of the first pulse in the waveform or gated region to rise from the low reference value (default = 10%) to the high reference value (default = 90%) of the final value. Fall Time The time required for the falling edge of the first pulse in the waveform or gated region to fall from the high reference value (default = 90%) to the low reference value (default = 10%) of the final value. Positive Duty Cycle The ratio of the positive pulse width to the signal period expressed as a percentage. The duty cycle is measured on the first cycle in the waveform or gated region. DPO3000 Series Oscilloscopes User Manual 157 Analyze Waveform Data Time Measurements (cont.) Measurement Negative Duty Cycle The ratio of the negative pulse width to the signal period expressed as a percentage. The duty cycle is measured on the first cycle in the waveform or gated region. Positive Pulse Width The distance (time) between the mid reference (default 50%) amplitude points of a positive pulse. The measurement is made on the first pulse in the waveform or gated region. Negative Pulse Width The distance (time) between the mid reference (default 50%) amplitude points of a negative pulse. The measurement is made on the first pulse in the waveform or gated region. Burst Width The duration of a burst (a series of transient events) and is measured over the entire waveform or gated region. Phase 158 Description The amount of time that one waveform leads or lags another waveform, expressed in degrees where 360° makes up one waveform cycle. See also Delay. DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Amplitude Measurements Measurement Description Positive Overshoot This is measured over the entire waveform or gated region and is expressed as: Positive Overshoot = (Maximum – High) / Amplitude x 100%. Negative Overshoot This is measured over the entire waveform or gated region and is expressed as: Negative Overshoot = (Low – Minimum) / Amplitude x 100%. DPO3000 Series Oscilloscopes User Manual 159 Analyze Waveform Data Amplitude Measurements (cont.) Measurement Pk-Pk The absolute difference between the maximum and minimum amplitude in the entire waveform or gated region. Amplitude The high value less the low value measured over the entire waveform or gated region. High This value is used as 100% whenever high reference, mid reference, or low reference values are needed, such as in fall time or rise time measurements. Calculate using either the min/max or histogram method. The min/max method uses the maximum value found. The histogram method uses the most common value found above the midpoint. This value is measured over the entire waveform or gated region. Low This value is used as 0% whenever high reference, mid reference, or low reference values are needed, such as in fall time or rise time measurements. Calculate using either the min/max or histogram method. The min/max method uses the minimum value found. The histogram method uses the most common value found below the midpoint. This value is measured over the entire waveform or gated region. Max The most positive peak voltage. Max is measured over the entire waveform or gated region. Min 160 Description The most negative peak voltage. Min is measured over the entire waveform or gated region. DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Amplitude Measurements (cont.) Measurement Description Mean The arithmetic mean over the entire waveform or gated region. Cycle Mean The arithmetic mean over the first cycle in the waveform or the first cycle in the gated region. RMS The true Root Mean Square voltage over the entire waveform or gated region. Cycle RMS The true Root Mean Square voltage over the first cycle in the waveform or the first cycle in the gated region. DPO3000 Series Oscilloscopes User Manual 161 Analyze Waveform Data Miscellaneous Measurements Measurement The number of positive transitions from the low reference value to the high reference value in the waveform or gated region. Falling Edge Count The number of negative transitions from the high reference value to the low reference value in the waveform or gated region. Positive Pulse Count The number of positive pulses that rise above the mid reference crossing in the waveform or gated region. Negative Pulse Count The number of negative pulses that fall below the mid reference crossing in the waveform or gated region. Area Area measurement is a voltage over time measurement. It returns the area over the entire waveform or gated region in volt-seconds. Area measured above ground is positive; area measured below ground is negative. Cycle Area 162 Description Rising Edge Count A voltage over time measurement. The measurement is the area over the first cycle in the waveform or the first cycle in the gated region expressed in volt-seconds. The area above the common reference point is positive, and the area below the common reference point is negative. DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Customizing an Automatic Measurement You can customize automatic measurements by using gating, modifying measurement statistics, adjusting the measurement reference levels, or taking a snapshot. Gating Gating confines the measurement to a certain portion of a waveform. To use: 1. Push Measure. 2. Push More as many times as needed to select Gating from the resulting pop-up menu. DPO3000 Series Oscilloscopes User Manual Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 163 Analyze Waveform Data 3. Position the gates from the side-bezel menu options. Gating Off (Full Record) Screen Between Cursors Bring Cursors On Screen 164 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Statistics Statistics characterize the stability of measurements. To adjust statistics: 1. Push Measure. 2. Push More as many times as needed to select Statistics from the resulting pop-up menu. DPO3000 Series Oscilloscopes User Manual Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 165 Analyze Waveform Data 3. Push the side-bezel menu options. These include whether to turn statistics on or off and how many samples to use for mean and standard deviation calculations. Measurement Statistics On| Off Mean & Std Dev Samples (a) |32 Reset Statistics Snapshot To see all the single-sourced measurements at one moment in time: 1. Push Measure. 166 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 2. Push Add Measurement. as many times as needed to select Statistics from the resulting pop-up menu. Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 3. Turn multipurpose knob a to select the Measurement Type of Snapshot. 4. Push OK Snapshot All Measurements. OK Snapshot All Measurements 5. View results. DPO3000 Series Oscilloscopes User Manual 167 Analyze Waveform Data Snapshot on 1 Period +Width Burst W Rise +Duty +Over High Max Ampl Mean RMS Area 168 : 312.2μs : 103.7μs : 936.5μs : 1.452μs : 33.23% : 7.143% : 9.200 V : 10.40 V : 16.80 V : -5.396 V : 7.769 V : -21.58mVs Freq –Width : 3.203kHz : 208.5μs Fall –Duty –Over Low Min Pk-Pk CycleMean CycleRMS CycleArea : 1.144μs : 66.77 % : 7.143 % : -7.600 V : -8.800 V : 19.20 V : -5.396 V : 8.206 V : -654.6μVs DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Reference Levels Reference levels determine how time-related measurements are taken. For example, they are used in calculating rise and fall times. 1. Push Measure. 2. Push More as many times as needed to select Reference Levels from the resulting pop-up menu. DPO3000 Series Oscilloscopes User Manual Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 169 Analyze Waveform Data 3. Set the levels from the side-bezel menu. Reference Levels Set Levels in % | Units Use High and Low reference to calculate rise and fall times. High Ref (a) 90.0 % Use Mid reference primarily for measurements between edges, such as pulse widths. Mid Ref 50.0 % 50.0 % Low Ref 10.0 % - Set to Defaults 170 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Taking Manual Measurements with Cursors Cursors are on-screen markers that you position in the waveform display to take manual measurements on acquired data. They appear as horizontal and/or as vertical lines. To use cursors: 1. Push Cursors. This changes the cursor state. The three states are: No cursors appear on the screen. Two vertical waveform cursors appear. They are attached to the selected waveform. Four screen cursors appear. Two are vertical and two are horizontal. They are no longer specifically attached to a waveform. For example, the first time you push Cursors, the state might be off. DPO3000 Series Oscilloscopes User Manual 171 Analyze Waveform Data 2. Push Cursors again. In the example, two vertical cursors appear on the selected screen waveform. As you turn multipurpose knob a, you move one cursor to the right or left. As you turn knob b, you move the other cursor. If you change the selected waveform by pushing the front-panel 1, 2, 3, 4, M, or R button, both cursors jump to the new selected waveform. 3. Push Select. This turns the cursor linking on and off. If linking is on, turning multipurpose knob a moves the two cursors together. Turning multipurpose knob b adjusts the time between the cursors. 172 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 4. Push Fine to toggle between a coarse and a fine adjustment for multipurpose knobs a and b. Pushing Fine also changes the sensitivity of other knobs as well. 5. Push Cursors again. This will put the cursors into screen mode. Two horizontal bars and two vertical bars span the graticule. DPO3000 Series Oscilloscopes User Manual 173 Analyze Waveform Data 6. Turn multipurpose knobs a and b to move the pair of horizontal cursors. 7. Push Select. This makes the horizontal cursors active and the vertical ones inactive. Now, as you turn the multipurpose knobs, the horizontal cursors will move. Push Select again to make the vertical cursors active again. 174 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 8. View the cursor and the cursor readout. You can take timing measurements with cursors on digital channels, but not amplitude measurements. 9. Push Cursors again. This will turn off the cursor mode. The screen will no longer display the cursors and the cursor readout. DPO3000 Series Oscilloscopes User Manual 175 Analyze Waveform Data Using Cursor Readouts Cursor readouts supply textual and numeric information relating to the current cursor positions. The oscilloscope always shows the readouts when the cursors are turned on. Readouts appear in the upper right corner of the graticule. If Zoom is on, the readout appears in the upper right corner of the zoom window. When a bus is selected, the readout shows the decoded bus data in the format you have selected, hexadecimal, binary, decimal, or ASCII (depending on the selected standard). The data value of that point is displayed in the cursor readout. Δ Readout: The Δ readouts indicate the difference between the cursor positions. a Readout: Indicates that the value is controlled by multipurpose knob a. b Readout: Indicates that the value is controlled by multipurpose knob b. 176 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data The horizontal cursor lines on the display measure the vertical parameters, typically voltage. The vertical cursor lines on the display measure horizontal parameters, typically time. The square and circle shapes in the readout map to the multipurpose knobs when both vertical and horizontal cursors are present. Using XY Cursors When the XY Display mode is on, the cursor readouts will appear to the right of the graticule. They include rectangular, polar, product, and ratio readouts. Using Math Waveforms Create math waveforms to support the analysis of your channel and reference waveforms. By combining and transforming source waveforms and other data into math waveforms, you can derive the data view that your application requires. DPO3000 Series Oscilloscopes User Manual 177 Analyze Waveform Data NOTE. Math waveforms are not available for use with serial buses. Use the following procedure for executing simple (+, –, *, ÷) math operations on two waveforms: 1. Push Math. 2. Push Dual Wfm Math. Dual Wfm Math FFT Advanced Math (M) Label 3. On the side-bezel menu, set the sources to either channel 1, 2, 3, 4, or reference waveforms R1, R2, R3, or R4. Choose the +, –, x, or ÷ operators. 178 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 4. For example, you might calculate power by multiplying a voltage waveform and a current waveform. Quick Tips Math waveforms can be created from channel or reference waveforms or a combination of them. Measurements can be taken on math waveforms in the same way as on channel waveforms. Math waveforms derive their horizontal scale and position from the sources in their math expressions. Adjusting these controls for the source waveforms also adjusts the math waveform. You can zoom in on math waveforms using the inner knob of the Pan-Zoom control. Use the outer knob for positioning the zoomed area. (See page 189, Using Wave Inspector to Manage Long Record Length Waveforms.) DPO3000 Series Oscilloscopes User Manual 179 Analyze Waveform Data Using FFT An FFT breaks down signals into component frequencies, which the oscilloscope uses to display a graph of the frequency domain of a signal, as opposed to the oscilloscope’s standard time domain graph. You can match these frequencies with known system frequencies, such as system clocks, oscillators, or power supplies. 1. Push Math. 2. Push FFT. 180 Dual Wfm Math FFT Advanced Math (M) Label DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data FFT 3. Push the side-bezel menu FFT Source button, if needed, and turn multipurpose knob a to select the source to use. Choices are: channels 1, 2, 3, 4, reference waveforms R1, R2, R3, and R4. FFT Source 1 4. Push the side-bezel Vertical Scale button repeatedly to select either Linear RMS or dBV RMS. Vertical Units Linear RMS 5. Push the side-bezel Window button repeatedly to select the desired window. Window choices are: Rectangular, Hamming, Hanning, and Blackman-Harris. Window Hanning 6. Push the side-bezel Horizontal button to activate multipurpose knobs a and b to pan and zoom the FFT display. DPO3000 Series Oscilloscopes User Manual Horizontal 625kHz 1.25kHz/div 181 Analyze Waveform Data 7. The FFT will appear on the display. Quick Tips Use short record lengths for faster instrument response. Use long record lengths to lower the noise relative to the signal and increase the frequency resolution. If desired, use the zoom feature along with the horizontal Position and Scale controls to magnify and position the FFT waveform. Use the default dBV RMS scale to see a detailed view of multiple frequencies, even if they have very different amplitudes. Use the linear RMS scale to see an overall view of how all frequencies compare to each other. 182 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data The FFT feature provides four windows. Each is a trade-off between frequency resolution and magnitude accuracy. What you want to measure and your source signal characteristics help determine which window to use. Use the following guidelines to select the best window. Description Window Rectangular This is the best type of window for resolving frequencies that are very close to the same value but worst for accurately measuring the amplitude of those frequencies. It is the best type for measuring the frequency spectrum of nonrepetitive signals and measuring frequency components near DC. Use Rectangular for measuring transients or bursts where the signal level before and after the event are nearly equal. Also, use this window for equal-amplitude sine waves with frequencies that are very close and for broadband random noise with a relatively slow varying spectrum. Hamming This is a very good window for resolving frequencies that are very close to the same value with somewhat improved amplitude accuracy over the rectangular window. It has a slightly better frequency resolution than the Hanning. Use Hamming for measuring sine, periodic, and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are significantly different. Hanning This is a very good window for measuring amplitude accuracy but less so for resolving frequencies. Use Hanning for measuring sine, periodic, and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are significantly different. DPO3000 Series Oscilloscopes User Manual 183 Analyze Waveform Data Description Window Blackman-Harris: This is the best window for measuring the amplitude of frequencies but worst at resolving frequencies. Use Blackman-Harris for measuring predominantly single frequency waveforms to look for higher order harmonics. Using Advanced Math The advanced math feature lets you create a custom math waveform expression that can incorporate active and reference waveforms, measurements, and/or numeric constants. To use this feature: 1. Push Math. 184 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 2. Push Advanced Math. Dual Wfm Math FFT Advanced Math 3. Use the side-bezel menu buttons to create custom expressions. DPO3000 Series Oscilloscopes User Manual 185 Analyze Waveform Data 4. Push Edit Expression and use the multipurpose knobs and the resulting lower-bezel buttons to create an expression. When done, push the side-bezel menu OK Accept button. For example, to use Edit Expression to take the integral of a square wave: 1. Push the lower-bezel Clear button. 2. Turn multipurpose knob a to select Intg(. 3. Push Enter Selection. 4. Turn multipurpose knob a to select channel 1. 5. Push Enter Selection. 6. Turn multipurpose knob a to select ). 7. Push OK Accept. 186 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Using Reference Waveforms Create a reference waveform to store a waveform. For example, you might do this to set up a standard against which to compare other waveforms. To use the reference waveforms: NOTE. 5 M reference waveforms are volatile and not saved when the oscilloscope power is turned off. To keep these waveforms, save them to external storage. 1. Push Ref R. This brings up the lower-bezel reference menu. 2. Use the resulting lower-bezel menu selections to display or select a reference waveform. DPO3000 Series Oscilloscopes User Manual (R1) |(On) 3-May-07 (R2) |(Off) (R3) |(Off) (R4) |(Off) 187 Analyze Waveform Data 3. Use the side-bezel menu and the multipurpose knobs to adjust the vertical and horizontal settings of the reference waveform. R1 Vertical 0.00 div 100 mV/div Horizontal 0.00 s 4.00 μs/div Quick Tips Selecting and Displaying Reference Waveforms. You can display all the reference waveforms at the same time. Push the appropriate screen button to select a particular reference waveform. Removing Reference Waveforms from the Display. To remove a reference waveform from the display, push the front-panel R button to access the lower-bezel menu. Then push the associated button from the lower-bezel menu to turn it off. Scaling and Positioning a Reference Waveform. You can position and scale a reference waveform independently from all other displayed waveforms. Select the reference waveform and then adjust it with a multipurpose knob. You can do this whether acquisition is running or not. If a reference waveform is selected, scaling and repositioning of the reference waveform operates the same way whether zoom is turned on or off. 188 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data Saving 5 M Reference Waveforms. 5 M reference waveforms are volatile and not saved when the oscilloscope power is turned off. To keep these waveforms, save them to external storage. Using Wave Inspector to Manage Long Record Length Waveforms The Wave Inspector controls (zoom/pan, play/pause, marks, search) help you to efficiently work with long record length waveforms. To magnify a waveform horizontally, turn the Zoom knob. To scroll through a zoomed waveform, turn the Pan knob. The Pan-Zoom Control consists of: 1. An outer pan knob 2. An inner zoom knob DPO3000 Series Oscilloscopes User Manual 189 Analyze Waveform Data Zooming a Waveform To use zoom: 1. Rotate the inner knob on the Pan-Zoom control clockwise to zoom in on a selected portion of the waveform. Rotate the knob counterclockwise to zoom back out. 2. Alternatively, enable or disable the zoom mode by pushing the zoom button. 190 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 3. Examine the zoomed view of the waveform that appears on the larger, lower portion of the display. The upper portion of the display will show the position and size of the zoomed portion in the waveform, within the context of the overall record. Panning a Waveform While the zoom feature is on, you can use the pan feature to quickly scroll through the waveform. To use pan: DPO3000 Series Oscilloscopes User Manual 191 Analyze Waveform Data 1. Rotate the pan (outer) knob of the pan-zoom controls to pan the waveform. Turn the knob clockwise to pan forward. Turn it counterclockwise to pan backwards. The further you turn the knob, the faster the zoom window pans. Playing and Pausing a Waveform Use the play-pause feature to automatically pan through a waveform record. To use it: 192 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 1. Enable the play-pause mode by pushing the play-pause button. 2. Adjust the play speed by turning the pan (outer) knob further. The further you turn it, the faster it goes. 3. Change the play direction by reversing the direction that you are turning the pan knob. 4. During play, up to a point, the more you turn the ring, the faster the waveform accelerates. If you rotate the ring as far as it can go, the play speed does not change, but the zoom box quickly moves in that direction. Use this maximum rotation feature to replay a portion of the waveform that you just saw and want to see again. DPO3000 Series Oscilloscopes User Manual 193 Analyze Waveform Data 5. Pause the play-pause feature by pushing the play-pause button again. Searching and Marking Waveforms You can mark locations of interest in the acquired waveform. These marks help you limit your analysis to particular regions of the waveform. You can mark areas of the waveform automatically, if they meet some special criteria, or you can manually mark each item of interest. You can use arrow keys to jump from mark to mark (area of interest to area of interest). You can automatically search and mark many of the same parameters that you can trigger on. Search marks provide a way to mark a waveform region for reference. You can set marks automatically with search criteria. You can search for and mark regions with particular edges, pulse widths, runts, logic states, rise/fall times, setup and hold, and bus search types. 194 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data To manually set and clear (delete) marks: 1. Move (the zoom box) to the area on the waveform where you want to set (or clear) a search mark by turning the pan (outer) knob. Push the next ( →) or previous (←) arrow button to jump to an existing mark. 2. Push Set/Clear. If no search mark is at the screen center, the oscilloscope will add one. 3. Investigate your waveform by moving from search mark to search mark. Use the next ( →) or previous (←) arrow button to jump from one marked location to another, without adjusting any other controls. DPO3000 Series Oscilloscopes User Manual 195 Analyze Waveform Data 4. Delete a mark. Push the next ( →) or previous (←) arrow button to jump to the mark you want to clear. To remove the current, center-positioned mark, push Set/Clear. It works on both manually and automatically created marks. To automatically set and clear (delete) search marks: 1. Push Search. 2. Select the search type desired from the lower-bezel menu. Search Off Search Type Edge Source 1 Slope Threshold 0.00V The search menu is similar to the trigger menu. 3. From the side-bezel menu, turn on the search. 196 DPO3000 Series Oscilloscopes User Manual Analyze Waveform Data 4. On the screen, hollow triangles show the location of automatic marks and solid triangles show the custom (user-defined) locations. These appear on both normal and zoomed waveform views. 5. You can quickly investigate your waveform by moving from search mark to search mark with the next ( →) and previous (←) arrow buttons. No other adjustments are needed. Quick Tips. You can copy trigger settings to search for other locations in your acquired waveform that meet the trigger conditions. You can also copy search settings to your trigger. Custom (User) marks are saved with the waveform when the waveform is saved and when the setup is saved. Automatic search marks are not saved with the waveform when the waveform is saved. However, you can easily recapture them by reusing the search function. The search criteria are saved in the saved setup. DPO3000 Series Oscilloscopes User Manual 197 Analyze Waveform Data The Wave Inspector includes the following search capabilities: Search Edge Searches for edges (rising or falling) with a user-specified threshold level. Pulse Width Searches for positive or negative pulse widths that are >, <, =, or ≠ a user specified pulse width. Runt Searches for positive or negative pulses that cross one amplitude threshold but fail to cross a second threshold before crossing the first again. Search for all runt pulses or only those with a duration >, <, =, or ≠ a user specified time. Logic Search for a logic pattern (AND, OR, NAND, or NOR) across multiple waveforms with each input set to either High, Low, or Don’t Care. Search for when the event goes true, goes false, or stays valid for >, <, =, or ≠ a user specified time. Additionally, you can define one of the inputs as a clock for synchronous (state) searches. Setup & Hold Search for violations of user specified Setup and Hold times. Rise/Fall Time Search for rising and/or falling edges that are >, <, =, or ≠ a user specified time. Bus 198 Description I2C: Search for Start, Repeated Start, Stop, Missing Ack, Address, Data, or Address and Data. SPI: Search for SS Active, MOSI, MISO, or MOSI & MISO CAN: Search for Start of Frame, Type of Frame (Data, Remote, Error, Overload), Identifier (standard or extended), Data, Identifier and Data, End of Frame, or Missing Ack, Bit Stuffing Error RS-232, RS-422, RS-485, UART: Search for Tx Start Bit, Rx Start Bit, Tx End of Packet, Rx End of Packet, Tx Data, Rx Data, Tx Parity Error, Rx Parity Error. LIN: Search for Synch, Identifier, Data, ID & Data, Wakeup Frame, Sleep Frame, Error DPO3000 Series Oscilloscopes User Manual Save and Recall Information Save and Recall Information The oscilloscope provides permanent storage for setups, waveforms, and screen images. Use the internal storage of the oscilloscope to save setup files and reference waveform data. Use external USB flash drives, to save setups, waveforms, and screen images. Use the external storage to carry data to remote computers for further analysis and for archiving. External File Structure. If you are saving information to external storage, select the appropriate menu (such as the To File side-bezel menu to save setups and waveforms) and turn multipurpose knob a to scroll through the external file structure. E: is the USB flash drive plugged into the USB port on the front of the oscilloscope F: is the USB flash drive plugged into the USB port on the rear of the oscilloscope Use multipurpose knob a to scroll through the list of files. Use the Select front panel button to open and close folders. Naming Your File. The oscilloscope gives all files it creates a default name in the following format: tekXXXXX.set for setup files where XXXXX is an integer from 00000 to 99999 tekXXXXX.png, tekXXXXX.bmp, or tekXXXXX. tif for image files tekXXXXYYY.csv for spreadsheet files or tekXXXXYYY.isf for internal format files For waveforms, the XXXX is an integer from 0000 to 9999. The YYY is the channel of the waveform, and can be one of the following: CH1, CH2, CH3, or CH4 for the analog channels MTH for a math waveform DPO3000 Series Oscilloscopes User Manual 199 Save and Recall Information RF1, RF2, RF3, or RF4 for reference memory waveforms ALL for a single spreadsheet file containing multiple channels when you select Save All Waveforms NOTE. Only analog channels and waveforms derived from analog channels (such as math and reference) can be saved to an ISF file. When saving all channels in ISF format, a group of files will be saved. Each will have the same value for XXXX, but the YYY values will be set to the different channels that were turned on when the Save All Waveforms was performed. For example, the first time you save a file, that file is named tek00000. The next time you save the same type of file, the file will be named tek00001. Editing File, Directory, Reference Waveform, or Instrument Setup Names. Give files descriptive names that you can recognize at a later date. To edit file names, directory names, reference waveform and instrument setup labels: 1. Push Save / Recall Menu. 200 DPO3000 Series Oscilloscopes User Manual Save and Recall Information 2. Push Save Screen Image, Save Waveform, or Save Setup. Save Screen Image 3. For waveform or setup files, enter the file manager by pushing the side-bezel menu To File item. To File Save Waveform Save Setup Recall Waveform Recall Setup Assign File Utilities Save| to Setup 4. Turn multipurpose knob a to scroll through the file structure. (See page 199, External File Structure.) DPO3000 Series Oscilloscopes User Manual 201 Save and Recall Information 5. Push Select to open or close file folders. 6. Push Edit File Name. Edit the file name the same way you edit labels for channels. (See page 79, Labeling Channels and Buses.) 7. Push the Menu Off button to cancel the save operation, or push a side-bezel menu OK Save item to complete the operation. OK Save 202 DPO3000 Series Oscilloscopes User Manual Save and Recall Information Saving a Screen Image A screen image consists of a graphical image of the oscilloscope screen. This is different from waveform data, which consists of numeric values for each point in the waveform. To save a screen image: 1. Push Save / Recall Menu. Do not yet push the Save button. 2. Push Save Screen Image from the lower-bezel menu. Save Screen Image Save Waveform Save Setup Recall Waveform Recall Setup Assign File Utilities Save| to Setup Save Screen Image 3. From the side-bezel menu, push File Format repeatedly to select among: .tif, .bmp, and .png formats. DPO3000 Series Oscilloscopes User Manual File Format .png 203 Save and Recall Information 4. Push Orientation to select between saving the image in a landscape (horizontal) and a portrait (vertical) orientation. Orientation 5. Push Ink Saver to turn the Ink Saver mode on or off. When on, this mode provides a white background. Ink Saver 6. Push Edit File Name to create a custom name for the screen image file. Skip this step to use a default name. Edit File Name 7. Push OK Save Screen Image to write the image to the selected media. OK Save Screen Image On |Off For information on printing screen images of waveforms, go to Printing a Hard Copy. (See page 214, Printing a Hard Copy.) Saving and Recalling Waveform Data Waveform data consists of the numeric values for each point in the waveform. It copies the data, as opposed to a graphical image of the screen. To save the current waveform data or to recall previously stored waveform data: 204 DPO3000 Series Oscilloscopes User Manual Save and Recall Information 1. Push Save / Recall Menu. 2. Push Save Waveform or Recall Waveform from the lower-bezel menu. Save Screen Image Save Waveform Save Setup Recall Waveform Recall Setup Assign File Utilities Save| to Waveform NOTE. The oscilloscope can save digital waveforms to .csv files, not reference memories. The oscilloscope cannot recall digital waveforms. 3. Select one waveform or all waveforms. 4. From the resulting side-bezel menu, select the location to save the waveform data to or to recall it from. Save the information externally to a file on a USB flash drive. Alternatively, save the information internally to one of the two reference memory files on 2-channel model or one of the four reference files on 4-channel model oscilloscopes. DPO3000 Series Oscilloscopes User Manual 205 Save and Recall Information 5. Push File Details to save to a USB flash drive. File Details This brings up the file manager screen. Use it to define a custom file name. Skip this step to use the default name and location. Saving a Waveform to File. When you push the File Details side-bezel menu button, the oscilloscope changes the side-bezel menu contents. The following table describes these side-bezel menu items for saving data to a mass storage file. Side-bezel menu button Description Internal File Format (.ISF) Sets the oscilloscope to save waveform data from analog channels (and math and reference waveforms derived from analog channels), in internal waveform save file (.isf) format. This format is the fastest to write and creates the smallest-sized file. Use this format if you intend to recall a waveform to reference memory for viewing or measuring. The oscilloscope cannot save digital waveforms in an .isf file format. Spreadsheet File Format (.CSV) Sets the oscilloscope to save waveform data as a comma-separated data file compatible with popular spreadsheet programs. This file cannot be recalled to reference memory. Saving an Analog Waveform to Reference Memory. To save an analog waveform to nonvolatile memory inside the oscilloscope, select the waveform that you want to save, push the Save Waveform screen button, and then select one of the reference waveform locations. Four-channel models have four reference locations. Two-channel models have two reference locations. Saved waveforms contain only the most recent acquisition. Gray-scale information, if any, is not saved. 206 DPO3000 Series Oscilloscopes User Manual Save and Recall Information NOTE. 5 M reference waveforms are volatile and not saved when the oscilloscope power is turned off. To keep these waveforms, save them to external storage. Displaying a Reference Waveform. To display a waveform stored in nonvolatile memory: 1. Push Ref R. 2. Push R1, R2, R3, or R4. DPO3000 Series Oscilloscopes User Manual (R1) |(On) (R2) |(Off) (R3) |(Off) (R4) |(Off) 207 Save and Recall Information Removing a Reference Waveform from the Display. To remove a reference waveform from the display: 1. Push Ref R. 2. Push the R1, R2, R3, or R4 lower-bezel button to remove the reference waveform from the display. (R1) |(On) (R2) |(Off) (R3) |(Off) (R4) |(Off) The reference waveform is still in nonvolatile memory and can be displayed again. 208 DPO3000 Series Oscilloscopes User Manual Save and Recall Information Saving and Recalling Setups Setup information includes acquisition information, such as vertical, horizontal, trigger, cursor, and measurement information. It does not include communications information, such as GPIB addresses. To save the setup information: 1. Push Save / Recall Menu. 2. Push Save Setup or Recall Setup from the lower-bezel menu. DPO3000 Series Oscilloscopes User Manual Save Screen Image Save Waveform Save Setup Recall Waveform Recall Setup Assign File Utilities Save| to Setup 209 Save and Recall Information 3. From the resulting side-bezel menu, select the location to save the setup to or to recall it from. To save setup information to one of the ten internal setup memories in the oscilloscope, push the appropriate side-bezel button. To save setup information to a USB file, push the To File button. Save Setup To File Edit Labels To Setup 1 To Setup 2 – more – 4. If you are saving information to a USB flash drive, turn multipurpose knob a to scroll through the file structure. (See page 199, External File Structure.) 210 DPO3000 Series Oscilloscopes User Manual Save and Recall Information Push Select to open or close file folders. Push the Menu Off button to cancel the save operation, or push a side-bezel menu Save to Selected File item to complete the operation. 5. Save the file. Save to Selected File Quick Tips Recalling the Default Setup. Push the front-panel Default Setup button to initialize the oscilloscope to a known setup. (See page 83, Using the Default Setup.) DPO3000 Series Oscilloscopes User Manual 211 Save and Recall Information Saving with One Button Push After you have defined the save/recall parameters with the Save/Recall Menu button and menu, you can save files with a single push of the Save button. For example, if you have defined the save operation to save waveform data to a USB drive, then each push of the Save button will save current waveform data to the defined USB drive. 1. To define the Save button behavior, push Save/Recall Menu. 2. Push Assign Save to button. 212 Save Screen Image Save Waveform Save Setup Recall Waveform Recall Setup Assign File Utilities Save| to Setup DPO3000 Series Oscilloscopes User Manual Save and Recall Information 3. Push the action to assign to the Save button. Assign Save to Screen Image Waveform Setup 4. From now on, when you push Save the oscilloscope will perform the action that you just specified rather than requiring you to navigate through the menus each time. DPO3000 Series Oscilloscopes User Manual 213 Save and Recall Information Printing a Hard Copy To print an image of what appears on the oscilloscope screen, do the following procedure. Connect a Printer to Your Oscilloscope Connect your printer to a USB port on the rear or front panel of the oscilloscope. Alternatively, you can print to networked printers through the Ethernet port. Set Up Print Parameters To set up the oscilloscope to print hard copies: 1. Push Utility. 214 DPO3000 Series Oscilloscopes User Manual Save and Recall Information 2. Push Utility Page. Utility Page 3. Turn multipurpose knob a and select Print Setup. Print Setup 4. Push Select Printer if you are changing the default printer. Utility Page Print Setup Select Printer ??? Orientation Landscape Ink Saver On Turn multipurpose knob a to scroll through the list of available printers. Push Select to choose the desired printer. To add a USB printer to the list, plug the printer into the USB port. The oscilloscope will automatically recognize most printers. To add an Ethernet printer to the list, refer to the next topic. (See page 217, Printing Over Ethernet.) DPO3000 Series Oscilloscopes User Manual 215 Save and Recall Information 5. Select the image orientation (portrait or landscape). Landscape Portrait 6. Choose Ink Saver On or Off. The On selection will print out a copy with a clear (white) background. Ink Saver on 216 Ink Saver off DPO3000 Series Oscilloscopes User Manual Save and Recall Information Printing Over Ethernet To set up the oscilloscope to print over Ethernet: 1. Connect an Ethernet cable to the rear-panel Ethernet port. 2. Push Utility. DPO3000 Series Oscilloscopes User Manual 217 Save and Recall Information 3. Push Utility Page. 4. Turn multipurpose knob a and select Print Setup. Print Setup 5. Push Select Printer. 218 Utility Page Utility Page Print Setup Select Printer ??? Orientation Landscape Ink Saver Off DPO3000 Series Oscilloscopes User Manual Save and Recall Information 6. Push Add Network Printer. Add Network Printer Rename Printer Delete Network Printer 7. Turn multipurpose knob a to scroll through the list of letters, numbers, and other characters to find the first character in the printer name that you want to enter. If you are using a USB keyboard, use the arrow keys to position the insertion point and type in the printer name. (See page 48, Connecting a USB Keyboard to Your Oscilloscope.) ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789_=+-!@#$%^&*(){}<>/~’”\|:,.? DPO3000 Series Oscilloscopes User Manual 219 Save and Recall Information 8. Push Select or Enter Character to let the oscilloscope know that you have picked the proper character to use. You can use the lower-bezel buttons to edit the name, as needed. Enter Character Back Space Delete Clear 9. Continue scrolling and pushing Select until you have entered all the desired characters. 10. Push the down arrow key to move the character cursor down a row to the Server Name field. Add Printer 11. Turn multipurpose knob a and push Select or Enter Character as often as needed to enter the name. 220 DPO3000 Series Oscilloscopes User Manual Save and Recall Information 12. If desired, push the down arrow key to move the character cursor down a row to the Server IP Address: field. OK Accept 13. Turn multipurpose knob a and push Select or Enter Character as often as needed to enter the name. 14. When done, push OK Accept. NOTE. If you have multiple printers connected to the oscilloscope at the same time, the oscilloscope will print to the printer listed in the Utility> Utility Page> Print Setup> Select Printer menu item. DPO3000 Series Oscilloscopes User Manual 221 Save and Recall Information Printing with One Button Push Once you have connected a printer to your oscilloscope and set up print parameters, you can print current screen images with a single push of a button: Push the printer icon button in the lower left corner of the front panel. 222 DPO3000 Series Oscilloscopes User Manual Save and Recall Information Erasing Oscilloscope Memory You can erase all setup and waveform information saved in the nonvolatile oscilloscope memory with the TekSecure function. If you have acquired confidential data on your oscilloscope, you may want to execute the TekSecure function before you return the oscilloscope to general use. The TekSecure function: Replaces all waveforms in all reference memories with null values Replaces the current front-panel setup and all stored setups with the default setup Displays a confirmation or warning message, depending on whether the verification is successful or unsuccessful To use TekSecure: 1. Push Utility. 2. Push Utility Page. DPO3000 Series Oscilloscopes User Manual Utility Page 223 Save and Recall Information 3. Turn multipurpose knob a and select Config. Config 4. Push TekSecure Erase Memory. Utility Page Config 5. Push OK Erase Setup and Ref Memory from the side-bezel menu. OK Erase Setup & Ref Memory Language English Set Date & Time TekSecure Erase Memory About To cancel the procedure, push Menu Off. 224 DPO3000 Series Oscilloscopes User Manual Save and Recall Information 6. Power off the oscilloscope, and then power it back on to complete the process. DPO3000 Series Oscilloscopes User Manual 225 Using Application Modules Using Application Modules Optional application module packages extend the capability of your oscilloscope. (See page 24, Application Module Free Trial.) You can install up to four application modules at one time. (See page 25, Installing an Application Module.) Refer to the DPO3000 Series Oscilloscopes Application Module Installation Instructions that came with your application module for instructions on installing and testing an application module. Some modules are described in the following list. Additional modules may be available. Contact your Tektronix representative or visit our Web site at www.tektronix.com for more information. Also, refer to Contacting Tektronix at the beginning of the manual. The DPO3EMBD Embedded Serial Triggering and Analysis Module adds triggering on packet level information in serial buses used in embedded designs (I2C and SPI), as well as analytical tools to help you efficiently analyze your serial bus. These include digital views of the signal, bus views, packet decoding, search tools, and event tables with timestamp information. The DPO3AUTO Automotive Serial Triggering and Analysis Module adds triggering on packet level information in serial buses used in automotive designs (CAN and LIN), as well as analytical tools to help you efficiently analyze your serial bus. These include digital views of the signal, bus views, packet decoding, search tools, and event tables with timestamp information. The DPO3COMP Computer Serial Triggering and Analysis Module adds triggering on byte or packet level information in RS-232, RS-422, RS-485, and UART buses, and analytical tools to help you efficiently analyze your serial bus. These include digital views of the signal, bus views, packet decoding, search tools, and event tables with timestamp information. The DPO3VID Extended Video Module adds triggering on a variety of standard HDTV signals, as well as on custom (non-standard) bilevel and trilevel video signals with 3 to 4,000 lines. 226 DPO3000 Series Oscilloscopes User Manual Application Examples Application Examples This section contains ways to use your instrument in both common and advanced troubleshooting tasks. Taking Simple Measurements If you need to see a signal in a circuit, but you do not know the signal amplitude or frequency, connect the probe from channel 1 of the oscilloscope to the signal. Then display the signal and measure its frequency and peak-to-peak amplitude. DPO3000 Series Oscilloscopes User Manual 227 Application Examples Using Autoset To quickly display a signal: 1. Push Autoset. The oscilloscope sets vertical, horizontal, and trigger controls automatically. You can manually adjust any of these controls if you need to optimize the display of the waveform. When you are using more than one channel, the autoset function sets the vertical controls for each channel and uses the lowest-numbered active channel to set the horizontal and trigger controls. Selecting Automatic Measurements The oscilloscope can take automatic measurements of most displayed signals. To measure signal frequency and peak-to-peak amplitude: 228 DPO3000 Series Oscilloscopes User Manual Application Examples 1. Push Measure. 2. Push Add Measurement. Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 3. Turn multipurpose knob a to select the Frequency measurement. If needed, press Source from the side menu and turn multipurpose knob b to select the channel from which you want to measure. Push OK Add Measurement from the side menu. Repeat this process to select the Peak-to-peak measurement. DPO3000 Series Oscilloscopes User Manual 229 Application Examples 4. Push Menu Off. 5. Observe that the measurements appear on the screen and update as the signal changes. 230 DPO3000 Series Oscilloscopes User Manual Application Examples Measuring Two Signals In this example, you are testing a piece of equipment and need to measure the gain of its audio amplifier. You have an audio generator that can inject a test signal at the amplifier input. Connect two oscilloscope channels to the amplifier input and output as shown. Measure both signal levels and use these measurements to calculate the gain. To display the signals connected to channels 1 and 2: DPO3000 Series Oscilloscopes User Manual 231 Application Examples 1. Push channel 1 and channel 2 to activate both channels. 2. Push Autoset. To select measurements for the two channels: 1. Push Measure to see the measurement menu. 232 DPO3000 Series Oscilloscopes User Manual Application Examples 2. Push Add Measurement. Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 3. Turn multipurpose knob a to select the Amplitude measurement from the side menu. If needed, press Source and turn multipurpose knob b to select channel 1. Push OK Add Measurement from the side menu. Repeat this process to select channel 2 and again push OK Add Measurement from the side menu. DPO3000 Series Oscilloscopes User Manual 233 Application Examples 4. Calculate the amplifier gain using the following equations: Gain = (output amplitude ÷ input amplitude) = (3.155 V ÷ 130.0 mV) = 24.27 Gain (dB) = 20 x log(24.27) = 27.7 dB Customizing Your Measurements In this example, you want to verify that the incoming signal to digital equipment meets its specifications. Specifically, the transition time from a low logic level (0.8 V) to a high logic level (2.0 V) must be 10 ns or less. 234 DPO3000 Series Oscilloscopes User Manual Application Examples To select the Rise Time measurement: 1. Push Measure. 2. Push Add Measurement. Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 3. Turn multipurpose knob a to select the Rise Time measurement. If needed, press Source from the side menu and turn multipurpose knob b to select the channel from which you want to measure. Push OK Add Measurement from the side menu. DPO3000 Series Oscilloscopes User Manual 235 Application Examples 4. Push More repeatedly until you select Reference Levels from the popup menu. Reference Levels 5. Push Set Levels in to select units. Set Levels in % | Units 6. Push High Ref and turn multipurpose knob a to enter 2.00 V. If needed, push Fine to change the sensitivity of the multipurpose knob. High Ref (a) 2.00 V Mid Ref 7. Push Low Ref and turn multipurpose knob a to enter 800 mV. If needed, push Fine to change the sensitivity of the multipurpose knob. Low Ref (a) 800 mV Rise time is typically measured between the 10% and 90% amplitude levels of a signal. These are the default reference levels that the oscilloscope uses for rise time measurements. However, in this example, you need to measure the time that the signal takes to pass between the 0.8 V and 2.0 V levels. You can customize the rise time measurement to measure the signal transition time between any two reference levels. You can set each of these reference levels to a specific percent of the signal amplitude or to a specific level in vertical units (such as volts or amperes). 236 DPO3000 Series Oscilloscopes User Manual Application Examples Measuring Specific Events. Next you want to see the pulses in the incoming digital signal, but the pulse widths vary so it is hard to establish a stable trigger. To look at a snapshot of the digital signal, do this step: 1. Push Single to capture a single acquisition. This assumes that the oscilloscope will trigger with the current settings. Now you want to measure the width of each displayed pulse. You can use measurement gating to select a specific pulse to measure. To measure the second pulse: 2. Push Measure. DPO3000 Series Oscilloscopes User Manual 237 Application Examples 3. Push Add Measurement. Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors 4. Turn multipurpose knob a to select the Positive Pulse Width measurement. If needed, press Source from the side menu and turn multipurpose knob b to select the channel from which you want to measure. Push OK Add Measurement from the side menu. 5. Push More repeatedly until you select Gating from the popup menu. 6. Select Between Cursors from the side-bezel menu to choose measurement gating using cursors. 238 Between Cursors DPO3000 Series Oscilloscopes User Manual Application Examples 7. Place one cursor to the left and one cursor to the right of the second pulse. 8. View the resulting width measurement (160 ms) for the second pulse. DPO3000 Series Oscilloscopes User Manual 239 Application Examples Analyzing Signal Detail In this example, you have a noisy signal displayed on the oscilloscope, and you need to know more about it. You suspect that the signal contains much more detail than you can currently see in the display. 240 DPO3000 Series Oscilloscopes User Manual Application Examples Looking at a Noisy Signal The signal appears noisy. You suspect that noise is causing problems in your circuit. To better analyze the noise: 1. Push Acquire. 2. Push Mode on the lower-bezel menu. DPO3000 Series Oscilloscopes User Manual Mode Sample Record Length 10k Delay On |Off Set Horiz. Position to 10% Waveform Display XY Display Off 241 Application Examples 3. Push Peak Detect on the side-bezel menu. Sample Peak Detect Hi Res Envelope Average 4. Push Intensity and turn multipurpose knob a to see the noise more easily. 242 DPO3000 Series Oscilloscopes User Manual Application Examples 5. View the results on the display. Peak detect emphasizes noise spikes and glitches in your signal as narrow as 1 ns, even when the time base is set to a slow setting. Peak-detect and the other acquisition modes are explained earlier in this manual. (See page 85, Acquisition Concepts.) DPO3000 Series Oscilloscopes User Manual 243 Application Examples Separating the Signal from Noise Now you want to analyze the signal shape and ignore the noise. To reduce random noise in the oscilloscope display: 1. Push Acquire. 2. Push Mode. Mode Sample Record Length 10K Delay On |Off Set Horiz. Position to 10% Waveform Display XY Display Off 3. Push Average on the side-bezel menu. Average 244 DPO3000 Series Oscilloscopes User Manual Application Examples Averaging reduces random noise and makes it easier to see detail in a signal. In the example to the right, a ring shows on the rising and falling edges of the signal when the noise is removed. DPO3000 Series Oscilloscopes User Manual 245 Application Examples Taking Cursor Measurements You can use the cursors to take quick measurements on a waveform. To measure the ring frequency at the rising edge of the signal: 1. Push channel 1 to select the channel 1 signal. 2. Push Measure. 3. Push Configure Cursors. 246 Add Measurement Remove Measurement Indicators More Bring Cursors On Screen Configure Cursors DPO3000 Series Oscilloscopes User Manual Application Examples 4. Push Vertical Bar Units from the side menu, if this choice is not already selected. Turn multipurpose knob a to select Hz (1/s) as the unit of measurement. 5. Push Cursors repeatedly until the two vertical bar cursors appear on the selected waveform. 6. Place one cursor on the first peak of the ring using multipurpose knob a. DPO3000 Series Oscilloscopes User Manual 247 Application Examples 7. If the cursor readout says that the cursors are linked, push Select to unlink them. 8. Place the other cursor on the next peak of the ring using multipurpose knob b. 248 DPO3000 Series Oscilloscopes User Manual Application Examples 9. The cursor Δ readout shows the measured ring frequency is 227 kHz. Triggering on a Video Signal The oscilloscope supports triggering on NTSC, SECAM, and PAL signals. DPO3000 Series Oscilloscopes User Manual 249 Application Examples In this example, you are testing the video circuit in a piece of medical equipment and need to display the video output signal. The video output is an NTSC standard signal. Use the video signal to obtain a stable display. To trigger on the video fields: 1. Push Trigger Menu. 250 DPO3000 Series Oscilloscopes User Manual Application Examples 2. Push Type. Type 3. Turn multipurpose knob a to scroll through the trigger type side menu until you select Video. Video 4. Push Video Standard, and turn multipurpose knob a to scroll through the standards until you select 525/NTSC. Type Video Video Standard 525/NTSC Source 1 Trigger On All Lines Mode Auto & Holdoff 5. Push Trigger On. DPO3000 Series Oscilloscopes User Manual 251 Application Examples 6. Select Odd Fields. Odd Fields If the signal had been noninterlaced, you could choose to trigger on All Fields. 7. Turn the Horizontal Scale knob to see a complete field across the screen. 8. View results. 252 DPO3000 Series Oscilloscopes User Manual Application Examples Triggering on Lines Triggering on Lines. To look at the video lines in the field: 1. Push Trigger Menu. 2. Push Type. Type 3. Turn multipurpose knob a to scroll through the trigger type side menu until you select Video. Video DPO3000 Series Oscilloscopes User Manual 253 Application Examples Type Video Video Standard 525/NTSC Source 1 Trigger On All Lines Mode Auto & Holdoff 4. Push Trigger On. 5. Select All Lines. To trigger on a specific line, select Line Number, and use multipurpose knob a to select the line number. All Lines 6. Adjust Horizontal Scale to see a complete video line across the screen. 254 DPO3000 Series Oscilloscopes User Manual Application Examples 7. Observe the results. Capturing a Single-Shot Signal In this example, the reliability of a reed relay in a piece of equipment has been poor, and you need to investigate the problem. You suspect that the relay contacts arc when the relay opens. The fastest you can open and close the relay is about once per minute, so you need to capture the voltage across the relay as a single-shot acquisition. To set up for a single-shot acquisition: 1. Adjust the Vertical Scale and Horizontal Scale to appropriate ranges for the signal you expect to see. DPO3000 Series Oscilloscopes User Manual 255 Application Examples 2. Push Acquire. 3. Push Mode. 4. Select Sample. 5. Push Trigger Menu. 6. Push Slope and . 7. Turn the Trigger Level knob to adjust the trigger level to a voltage midway between the open and closed voltages of the replay. 256 DPO3000 Series Oscilloscopes User Manual Application Examples 8. Push Single (single sequence). When the relay opens, the oscilloscope triggers and captures the event. The Single sequence button disables auto triggering so that only a valid triggered signal is acquired. DPO3000 Series Oscilloscopes User Manual 257 Application Examples Optimizing the Acquisition The initial acquisition shows the relay contact beginning to open at the trigger point. This is followed by large spikes that indicate contact bounce and inductance in the circuit. The inductance can cause contact arcing and premature relay failure. Before you take the next acquisition, you can adjust the vertical and horizontal controls to give you a preview of how the next acquisition might appear. As you adjust these controls, the current acquisition is repositioned, expanded, or compressed. This preview is useful to optimize the settings before the next single-shot event is captured. When the next acquisition is captured with the new vertical and horizontal settings, you can see more detail about the relay contact opening. You can now see that the contact bounces several times as it opens. 258 DPO3000 Series Oscilloscopes User Manual Application Examples Using the Horizontal Zoom Function To take a close look at a particular point on the acquired waveform, use the horizontal zoom function. To look closely at the point where the relay contact first begins to open: 1. Turn the Zoom knob. 2. Turn the Pan knob to place the center of the zoom box close to where the relay contact begins to open. 3. Turn the Zoom knob to magnify the waveform in the zoom window. DPO3000 Series Oscilloscopes User Manual 259 Application Examples The ragged waveform and the inductive load in the circuit suggest that the relay contact may be arcing as it opens. 260 DPO3000 Series Oscilloscopes User Manual Application Examples Correlating Data with a TLA5000 Logic Analyzer To troubleshoot designs with fast clock edges and data rates, it helps to view analog characteristics of digital signals in relation to complex digital events in the circuit. You can do that with iView, which lets you transfer analog waveforms from the oscilloscope to the logic analyzer display. You can then view time-correlated analog and digital signals side-by-side, and use this to pinpoint sources of glitches and other problems. The iView External Oscilloscope Cable allows you to connect your logic analyzer to a Tektronix oscilloscope. This enables communication between the two instruments. For DPO3000 series oscilloscopes, you also need a TEK-USB-488 adaptor. The Add External Oscilloscope wizard, which is available from the TLA application System menu, guides you through the process of connecting the iView cable between your logic analyzer and oscilloscope. The TLA also provides a setup window to assist you in verifying, changing, and testing the oscilloscope settings. Before acquiring and displaying a waveform, you must establish a connection between your Tektronix logic analyzer and oscilloscope using the Add External Oscilloscope wizard. DPO3000 Series Oscilloscopes User Manual 261 Application Examples To do this: 1. Select Add iView External Oscilloscope from the logic analyzer System menu. 262 DPO3000 Series Oscilloscopes User Manual Application Examples 2. Select your model of oscilloscope. 3. Follow the on-screen instructions, and then click Next. 4. See your Tektronix Logic Analyzer documentation for more information on correlating data between your Tektronix oscilloscope and logic analyzer. Tracking Down Bus Anomalies In this example, you are testing your new I2C circuit. Something is not working. You tell the master IC to send a message to the slave IC. Then you expect to receive data back and an LED to light. The light never goes on. Where in the ten or so commands that were sent out did the problem occur? Once you locate the problem location, how do you determine what went wrong? You can use your oscilloscope, with its serial triggering and long-record length management features, to track down the problem in both the physical layer and in the protocol layer of the bus. DPO3000 Series Oscilloscopes User Manual 263 Application Examples Basic Strategy First, you will display and acquire the bus signal by setting up the bus parameters and trigger. Then, you will search through each packet with the search/mark functions. NOTE. Triggering on I2C, SPI, CAN, LIN, RS-232, RS-422, RS-485, and UART bus signals requires use of an appropriate DPO3EMBD, DPO3AUTO, or DPO3COMP Serial Triggering and Analysis Module. 264 DPO3000 Series Oscilloscopes User Manual Application Examples 1. Connect the channel 1 probe to the clock line. 2. Connect the channel 2 probe to the data line. 3. Push Autoset. DPO3000 Series Oscilloscopes User Manual 265 Application Examples 4. Push the B1 button and enter the parameters of your I2C bus in the resulting screen menus. 5. Push Trigger Menu. 6. Push Type to select Bus. Enter trigger parameters in the resulting screen menus. 266 Type Bus Source Bus B1 (I2C) Trigger On Address Address 07F Direction Read Mode Auto & Holdoff DPO3000 Series Oscilloscopes User Manual Application Examples 7. Analyze the physical layer. For example, you can use the cursors for manual measurements. (See page 171, Taking Manual Measurements with Cursors.) You can also use the automated measurements. (See page 155, Taking Automatic Measurements.) 8. Push Search. Set Search Marks to On. Enter a search type, source, and other parameters as relevant on the lower-bezel menu and associated side-bezel menus. (See page 189, Using Wave Inspector to Manage Long Record Length Waveforms.) 9. Jump ahead to the next search point by pushing the right arrow key. Push it again and again until you see all the events. Jump back with the left arrow key. Do you have all the packets that you expected to have? If not, at least you have narrowed your search down to the last packet sent. DPO3000 Series Oscilloscopes User Manual 267 Application Examples 10. Analyze the decoded packets in the protocol layer. Did you send the data bytes in the correct order? Did you use the correct address? Troubleshooting an RS-232 Bus In this example, you are looking at analog characteristics of a digital signal in a digital circuit. You are doing this to analyze the signal integrity of a signal. For example, you might be testing RS-232 bus signals. Basic Strategy First, you will display and acquire the digital signal. Then, you will look at both the analog and digital representations of the signal. Finally, you will search through each RS-232 byte with the search/mark functions. 268 DPO3000 Series Oscilloscopes User Manual Application Examples NOTE. Triggering on RS-232 bus signals requires use of the DPO3COMP Serial Triggering and Analysis Module. (See page 24, Application Module Free Trial.) 1. Connect the desired analog probe tip to the desired test point. DPO3000 Series Oscilloscopes User Manual 269 Application Examples 2. Push Default Setup. 3. Push Autoset. 4. Push B1. 5. Push the Bus B1 lower-bezel button, use multipurpose knob a to select RS-232, and enter the parameters of the bus in the resulting screen menus. 6. Push the Bus Display lower-bezel button, push the Bus and Waveforms side-bezel button, and push the ASCII side-bezel. 270 DPO3000 Series Oscilloscopes User Manual Application Examples 7. Turn the Horizontal Scale knob to adjust the timebase. As you increase the time per division, you will see more data appear in the Bus display. 8. Push Trigger Menu. Select the Bus trigger type. Define what type of condition to trigger on, such as the Tx Start Bit. 9. Push Search, push the Search lower-bezel button, and select On in the side-bezel menu. 10. Push Search Type. Use multipurpose knob a to select Bus. Push Search For and select the desired search, such as for the Tx Start Bit. DPO3000 Series Oscilloscopes User Manual 271 Application Examples 11. Push the Previous and Next Mark buttons to navigate through the record. 12. Push Zoom and Pan to see the areas of interest and analyze the results. 272 DPO3000 Series Oscilloscopes User Manual Appendix: Warranted Specifications, Safety Certifications, and Electromagnetic Compatibility Appendix: Warranted Specifications, Safety Certifications, and Electromagnetic Compatibility Analog bandwidth, 50 Ω The limits stated below are for ambient temperature of ≤30 °C and the bandwidth selection set to FULL. Reduce the upper bandwidth frequency by 1% for each °C above 30 °C. Instrument 10 mV/div to 1 V/div 5 mV/div to 9.98 mV/div DPO3054 and DPO3052 DC to 500 MHz DC to 400 MHz Instrument 2 mV/div to 4.98 mV/div 1 mV/div to 1.99 mV/div DPO3054 and DPO3052 DC to 250 MHz DC to 150 MHz Instrument 5 mV/div to 1 V/div 2 mV to 4.98 mV/div 1 mV/div to 1.99 mV/div DPO3034 and DPO3032 DC to 300 MHz DC to 250 MHz DC to 150 MHz Instrument 1 mV/div to 1 V/div DPO3014 and DPO3012 DC to 100 MHz DPO3000 Series Oscilloscopes User Manual 273 Appendix: Warranted Specifications, Safety Certifications, and Electromagnetic Compatibility Input impedance, DC coupled DC Balance 0.2 div with the input DC-50 Ω coupled and 50 Ω terminated 0.2 div with the input DC-75 Ω coupled and 75 Ω terminated 0.25 div at 2 mV/div with the input DC-50 Ω coupled and 50 Ω terminated 0.25 div at 2 mV/div with the input DC-75 Ω coupled and 75 Ω terminated 0.5 div at 1 mV/div with the input DC-50 Ω coupled and 50 Ω terminated 0.5 div at 1 mV/div with the input DC-75 Ω coupled and 75 Ω terminated 0.2 div with the input DC-1 MΩ coupled and 50 Ω terminated 0.3 div at 1 mV/div with the input DC-1 MΩ coupled and 50 Ω terminated DC Gain accuracy 274 1 MΩ ±1% in parallel with 11.5 pF ±2 pF 75 Ω ±1% VSWR ≤ 1.3:1 from DC to 60 MHz, typical 50 Ω ±1% DPO3054, DPO3052: VSWR ≤ 1.5:1 from DC to 500 MHz, typical DPO3034, DPO3032: VSWR ≤ 1.5:1 from DC to 350 MHz, typical DPO3014, DPO3012: VSWR ≤ 1.5:1 from DC to 100 MHz, typical ±2.5% for Coarse setting of 1 mV/div, derated at 0.100%/°C above 30 °C ±2.0% for Coarse setting of 2 mV/div, derated at 0.100%/°C above 30 °C ±1.5% for Coarse settings of 5 mV/div and above, derated at 0.100%/°C above 30 °C ±3.0% for all Fine V/div settings, derated at 0.100%/°C above 30 °C DPO3000 Series Oscilloscopes User Manual Appendix: Warranted Specifications, Safety Certifications, and Electromagnetic Compatibility Offset accuracy ±[0.005 × | offset – position | + DC Balance] NOTE. Both the position and constant offset term must be converted to volts by multiplying by the appropriate volts/div term. Long-term sample rate and delay time accuracy ±10 ppm over any ≥ 1 ms time interval Auxiliary output (AUX OUT) LOW TRUE; LOW to HIGH transition indicates that the trigger occurred. The logic levels are given in the following table: Characteristic Vout (HI) ≥ 2.5 V open circuit; ≥ 1.0 V into a 50 Ω load to ground Vout (LO) Safety Certification Limits ≤ 0.7 V into a load of ≤ 4 mA; ≤0.25 V into a 50 Ω load to ground U.S. Nationally Recognized Testing Laboratory (NRTL) Listing: UL61010–1–2004 Standard for Electrical Measuring Canadian Certification: CAN/CSA C22.2 No. 61010–1 2004 Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use European Union Compliance: Low Voltage Directive 2006/95/EC, as Amended by 93/68/EEC EN61010–1 2001 Safety Requirements for Electrical Equipment for Measurement, Control. and Laboratory Use Additional Compliance: IEC61010–1 2001 Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use DPO3000 Series Oscilloscopes User Manual 275 Appendix: Warranted Specifications, Safety Certifications, and Electromagnetic Compatibility Electromagnetic Compatibility (EMC) European Union Australia 276 EC Council EMC Directive 89/336/EEC, amended by 93/68/EEC; Demonstrated using: IEC 61326:1997 Product Family Standard for Electrical Equipment for Measurement, Control, and Laboratory Use-EMC Requirements Emissions: EN 55011, Class A IEC 61000-3-2 IEC 61000-3-3 Immunity IEC 61000-4-2 IEC 61000-4-3 IEC 61000-4-4 IEC 61000-4-5 IEC 61000-4-6 IEC 61000-4-8 IEC 61000-4-11 EMC Framework, demonstrated per Emission Standard AS/NZS 2064 (Industrial, Scientific, and Medical Equipment) DPO3000 Series Oscilloscopes User Manual Index Index Symbols and Numbers 50 Ω protection, 151 A About, 39 Accessories, 1 Acquire button, 54, 90, 136, 241, 244 Acquisition input channels and digitizers, 85 modes defined, 88 readout, 65 sampling, 86 Adapter TEK-USB-488, 6 TPA-BNC, 5, 13 Adding waveform, 136 Advanced math, 184 Altitude DPO3000, 9 P6139A, 11 Amplitude measurement, 160 Annotating the screen, 153 Application modules, 25, 226 DPO3000 Series Oscilloscopes User Manual 30-day free trial, 24 DPO3AUTO, 5, 95 DPO3COMP, 5, 95 DPO3EMBD, 5, 95 DPO3VID, 5, 120 Area measurement, 162 Attenuation, 150 Auto trigger mode, 108 Autoset, 84, 228 Video, 85 Autoset button, 21, 54, 61, 77, 84, 228 Autoset undo, 85 Aux In connector, 72 Aux Out connector, 74 Auxiliary readout, 70 Average acquisition mode, 89 B B trigger, 134 B1 / B2 button, 95, 96, 121 Backlight intensity, 142 Bandwidth, x, 148 Before Installation, 1 Blackman-Harris FFT window, 184 BNC interface, 14 Burst Width measurement, 158 Bus button, 95, 96, 121 display, 71, 102, 103 menu, 56, 97 positioning and labeling, 151 setup, 96 Bus and Waveforms display, 102 show physical layer bus activity, 105 Bus trigger, defined, 120 Buses, 95, 121 cursor readout, 176 Button Acquire, 54, 90, 136, 241, 244 Autoset, 21, 54, 61, 77, 84, 228 B1 / B2, 56, 95, 96, 121 bus, 95, 96, 121 Cal, 74 Channel, 55 Cursors, 57, 171, 247 Default Setup, 63, 77, 83 Fine, 53, 57, 58, 59, 60, 62 277 Index Force Trig, 61, 109 hard copy, 62, 222 Intensity, 143 M, 56, 178, 180 Math, 56, 178, 180 Measure, 54, 155, 165, 166, 229, 232, 235, 237 Menu Off, 63, 230 Next, 60 Play-pause, 59, 193 Previous, 60 Print, 62 printer, 222 Ref, 56, 187, 207 Run/Stop, 61, 94, 135 Save / Recall, 55, 63, 203 Search, 54, 196 Select, 58, 248 Set / Clear Mark, 60, 195 Set to 50%, 61, 113 Single, 61, 135, 237, 257 Test, 54 Trigger, 54 Trigger level, 61 Trigger menu, 114, 250 Utility, 26, 28, 31, 55, 139, 142, 153, 214 278 Vertical, 55 Zoom, 59 byte matching, 129 C Cal button, 74 Calibration, 30, 32 Calibration certificate, 2 CAN, 56, 95, 121 CAN trigger, 127 Channel button, 55 Channel readout, 70 Channel vertical menu, 147 Cleaning, 12 Clearance, DPO3000, 8 Communications, 40, 45 Compensate probe, 22 Compensate signal path, 30 Confidential data, 223 Connecting a USB keyboard, 48 Connecting to a PC, 40 Connectivity, 2, 40, 45 Connector Aux Out, 74 Probe Power, 74 Video port, 74 Connectors front-panel, 72 rear-panel, 74 side-panel, 73 Controls, 49 Coupling, 147 Coupling, trigger, 110 Cover, front, 3 Cross Hair graticule style, 141 CSV format, 206 Cursor readout, 67, 176 Cursors, 171 button, 57, 171, 247 linking, 172 measurements, 171 menu, 171 XY, 177 Cycle Area measurement, 162 Cycle Mean measurement, 161 Cycle RMS measurement, 161 D Date and time, changing, 28 Default Setup, 83, 211 button, 63, 77, 83 menu, 63 DPO3000 Series Oscilloscopes User Manual Index Undo, 84 Delay measurement, 157 Delay time, 92, 93 Delayed trigger, 131 Depth, DPO3000, 8 Deskew, 150 Display information, 64 persistence, 136 style, 136 XY, 138, 139 Displaying, reference waveforms, 207 DPO3AUTO, 5, 95, 226 DPO3COMP, 5, 95, 226 DPO3EMBD, 5, 95, 226 DPO3VID, 5, 120, 226 Drivers, 40, 44 Dual waveform math, 178 E e*Scope, 45 Edge trigger, defined, 116 Envelope acquisition mode, 89 Erase setup and ref memory, 223 Ethernet, xi, 43, 45, 46 port, 74 DPO3000 Series Oscilloscopes User Manual printing, 217 Event Table, 103, 104 Excel, 40 Expansion point, 88 Expansion point icon, 66 F Factory calibration, 32 Fall Time measurement, 157 Falling Edge Count measurement, 162 FFT Blackman-Harris, 184 controls, 180 Hamming, 183 Hanning, 183 Rectangular, 183 File format, 203 Internal File Format (ISF), 206 Spreadsheet file format (.CSV), 206 File names, 199 File system, 199, 206 Fine, 58 Fine button, 53, 57, 59, 60, 62 Firmware upgrade, 33 Firmware version, 39 firmware.img file, 33 Force Trig button, 61, 109 Frame graticule style, 141 Frequency measurement, 157 Frequency, Source DPO3000, 8 Front cover, 3 Front panel, 49 Front-panel connectors, 72 Front-panel overlay, 27 Full graticule style, 141 Functional check, 19 G Gating, 163 GPIB, 41, 75 GPIB address, 43 Graticule Cross Hair, 141 Frame, 141 Full, 141 Grid, 141 intensity, 143 IRE, 141 mV, 141 279 Index styles, 139 Grid graticule style, 141 Ground, 16 Ground lead, 24 Ground strap, 16 Ground strap connector, 73 Ground yourself to discharge static, 16 H Hamming FFT window, 183 Hanning FFT window, 183 Hard copy, 214 Hard copy button, 62 Height, DPO3000, 8 Hi Res acquisition mode, 89 High measurement, 160 Holdoff, trigger, 109 Horizontal delay, 110 Horizontal position, 60, 88, 110, 111, 144, 182, 259 and math waveforms, 179 defined, 78 readout, 69 Horizontal scale, 60, 144, 182, 252, 254, 255, 259 and math waveforms, 179 280 defined, 78 readout, 69 How to compensate a voltage probe, 22 compensate the signal path, 30 connect probes and adapters, 13 connect to a computer, 40 erase memory, 223 label channels and buses, 79 manage long record length waveforms, 189 perform a functional check, 19 power off the oscilloscope, 18 power on the oscilloscope, 16 print a hard copy, 214 recall setups, 209 recall waveforms, 203 save screen images, 203 save setups, 209 save waveforms, 203 search through and add marks to waveforms, 194 select a trigger, 116 select automatic measurements, 157 setup analog channels, 76 setup bus parameters, 96 setup input parameters, 146 setup VISA communications, 40 take automatic measurements, 155 take manual measurements with cursors, 171 trigger on buses, 121 upgrade the firmware, 33 use a sequential trigger, 131 use e*Scope, 45 use Wave Inspector, 189 Humidity DPO3000, 9 P6139A, 12 I I2C, 56, 95, 121 trigger, 124 Icon Expansion point, 66 Trigger level, 68 Trigger position, 66 Image orientation, 204, 216 Impedance, 148 Indicator, waveform baseline, 71 Infinite persistence, 139 DPO3000 Series Oscilloscopes User Manual Index Ink Saver, 204, 216 Inner knob, 59, 179 Intensity button, 143 Internal File Format (ISF), 206 Invert, 148 IRE graticule, 141 ISF format, 206 K Keyboard, USB, 48 Knob inner, 59, 179 Multipurpose, 29, 53, 58, 59, 90, 206, 247, 248 outer, 59 pan, 59, 192, 195 Trigger level, 113 Vertical menu, 62 Vertical position, 62, 78 Vertical scale, 62, 78 zoom, 59, 179, 190 L Label bus, 151 LabView, 40 LAN port, 74 DPO3000 Series Oscilloscopes User Manual Landscape, 204, 216 Language change, 26 overlay, 27 Level, trigger, 112 LIN, 56, 95, 121 trigger, 128 Lock, standard laptop, 15 Logic trigger, defined, 118 Long record length, 263 management, 189 Low measurement, 160 M M button, 56, 178, 180 Main trigger, 131 Mark, 194 Math Advanced, 184 button, 56, 178, 180 Dual waveform, 178 FFT, 180 menu, 56 waveforms, 177 Max measurement, 160 Mean measurement, 161 Measure button, 54, 155, 165, 166, 229, 232, 235, 237 Measurement menu, 54 Measurements automatic, 155 cursor, 171 defined, 157 reference levels, 169 snapshot, 166 statistics, 165 Memory, erasure of, 223 Menu, 49 Bus, 56, 97 buttons, 53 Cursors, 171 Default Setup, 63 Math, 56 Measurement, 54 Reference, 56, 187, 188 Save / Recall, 55, 63, 203 Trigger, 54, 114, 131, 250 Utility, 26, 28, 55, 62, 139, 153, 215 Vertical, 55, 146 Menu Off button, 63, 230 Min measurement, 160 Mode, roll, 93 281 Index Multipurpose knob, 53, 58, 59, 90, 206, 247, 248 mV graticule, 141 N Negative Duty Cycle measurement, 158 Negative Overshoot measurement, 159 Negative Pulse Count measurement, 162 Negative Pulse Width measurement, 158 Network printing, 217 Next button, 60 NI SignalExpress Tektronix Edition software, xi Normal trigger mode, 108 O Offset and position, 150 Offset vertical, 149 OpenChoice, xi, 2 Operating specifications, 8 Orientation of the image, 204, 216 Outer knob, 59 282 Overlay, 27 P P6139A probe, 3 Pan, 190, 191 knob, 59, 192, 195 Parallel bus, 121 Pause, 191 Peak detect acquisition mode, 89 Period measurement, 157 Persistence display, 136 infinite, 139 variable, 139 Phase measurement, 158 Physical layer bus activity, 105 Pk-Pk measurement, 160 Play, 191 Play-pause button, 59, 193 Play-pause mode, 193 Pollution Degree DPO3000, 9 P6139A, 11 Portrait, 204, 216 Position bus, 151 Horizontal, 110, 111, 144, 182, 259 Vertical, 145 Position and offset, 150 Positive Duty Cycle measurement, 157 Positive Overshoot measurement, 159 Positive Pulse Count measurement, 162 Positive Pulse Width measurement, 158 Posttrigger, 107, 111 Power cord, 4 input, 75 off, 18 removing, 18 supply, 16 switch, 62 Power consumption, DPO3000, 8 Predefined math expressions, 178 Pretrigger, 107, 111 Previous button, 60 Print, 215 Ethernet, 217 hard copy, 214 Print button, 62 DPO3000 Series Oscilloscopes User Manual Index Probe Comp, 20 PROBE COMP connector, 72 Probe compensation, 22 Probe connector analog, 72 Probe Power connector, 74 Probes BNC, 14 connecting, 13 ground lead, 24 P6139A, 3 TEK-USB-488 Adapter, 6 TekVPI, 13 TPA-BNC Adapter, 5, 13 Pulse Width trigger, defined, 117 R Rackmount, 6 Readout Acquisition, 65 Auxiliary, 70 Bus Display, 102 Channel, 70 Cursor, 67, 176 Horizontal position/scale, 69 Record length/sampling rate, 68 DPO3000 Series Oscilloscopes User Manual Trigger, 68, 130 Trigger status, 67 Real-time sampling, 86 Rear-panel connectors, 74 Recalling setups, 209 waveforms, 203 Record length, x, 87 Record length/sampling rate readout, 68 Rectangular FFT window, 183 Ref button, 56, 187, 207 Ref R, 207 Reference levels, 169 Reference menu, 56, 187, 188 Reference waveforms, 187 displaying, 207 removing, 188, 208 saving, 206 saving 5 M waveforms, 188 Removing reference waveforms, 188, 208 Removing waveform, 136 Rise Time measurement, 157 Rise/Fall trigger, defined, 119 Rising Edge Count measurement, 162 RMS measurement, 161 Roll mode, 93, 94 Rolling window data matching, 128 RS-232, 56, 95, 121 bus example, 268 byte matching, 129 cursor readout, 176 decoding, 106 trigger, 128 Run/Stop button, 61, 94, 135 Runt trigger, defined, 118 S Safety Summary, v Sample acquisition mode, 88 Sample interval, 87 Sample rates, x Sampling process, defined, 86 Sampling, real-time, 86 Save / Recall menu, 55, 63, 203 Save / Recall Menu button, 55 Save / Recall Save button, 63, 203 Saving reference waveforms, 206 screen images, 203 setups, 209 waveforms, 203 283 Index Saving and recalling Information, 199 Scale Horizontal, 60, 144, 182, 252, 254, 255, 259 Vertical, 145, 255 Screen annotations, 153 Search, 194 Search / Mark, 263 Search button, 54, 196 Securing memory, 223 Security lock, 15 Select button, 58, 248 Sequence (B Trigger), defined, 117 Sequential triggering, 131 Serial bus, 95, 263 Serial bus trigger, 121 Serial buses trigger, 123 Set / Clear Mark button, 60, 195 Set to 50% button, 61, 113 Setup default, 63, 77, 83, 211 Setup and Hold trigger, defined, 119 Side panel connector, 73 Signal path compensation, 30 Single button, 61, 135, 237, 257 Single sequence, 94, 135 Slope, trigger, 112 284 Snapshot, 166 Software drivers, 40, 44 Software, optional, 226 SPC, 30 Specifications operating, 8 power supply, 16 SPI, 56, 95, 121 SPI trigger, 126 Spreadsheet file format (.CSV), 206 Start an acquisition, 135 Statistics, 165 Stop an acquisition, 135 SVGA Out, 74 Switch, power, 62 T Table, Event, 103, 104 TEK-USB-488 Adapter, 6, 41, 43, 75 TekSecure, 223 TekVPI, 13 Temperature DPO3000, 8 P6139A, 11 Termination, 148 Test button, 54 TPA-BNC Adapter, 5, 13 Transit case, 6 Transition trigger, defined, 119 Trigger B trigger after delay time, 133 Bus, defined, 120 buses, 121 byte matching, 129 CAN bus, 127 concepts, 107 coupling, 110 data matching on a rolling window, 128 delayed, 131 Edge, defined, 116 event, defined, 107 forcing, 108 holdoff, 109 I2C bus, 124 level, 112 level button, 61 level icon, 68 level knob, 113 LIN bus, 128 Logic, defined, 118 modes, 108, 115 point, 87 DPO3000 Series Oscilloscopes User Manual Index position icon, 66 posttrigger, 107, 111 pretrigger, 107, 111 Pulse Width, defined, 117 readout, 68, 130 Rise/Fall, defined, 119 RS-232 bus, 128 RS-232 byte matching, 129 Runt, defined, 118 Sequence (B Trigger), defined, 117 sequential, 131 serial buses, 95, 123, 263 Setup and Hold, defined, 119 slope, 112 SPI bus, 126 status readout, 67 Trigger on B events, 134 video lines, 253 Video, defined, 120 Trigger menu, 54, 114, 131, 250 button, 114, 250 Trigger modes Auto, 108 Normal, 108 Trigger types, defined, 116 Triggering on Buses, 121 DPO3000 Series Oscilloscopes User Manual U Undo Autoset, 85 Default Setup, 84 Upgrading firmware, 33 USB, x, xi, 6, 41, 42, 44, 55, 199, 214 device port, 75 host ports, 63, 75 keyboard, 48 USBTMC, 75 User marks, 194 Utility button, 26, 28, 31, 55, 139, 142, 153, 214 Utility menu, 26, 28, 55, 62, 139, 153 V Variable persistence, 139 Versatile Probe Interface, 13 Version, firmware, 39 Vertical button, 55 menu, 55, 146 Menu knob, 62 offset, 151 Offset, 149 position, 145 position and autoset, 85 position and offset, 150 Position knob, 62, 78 scale, 145, 255 Scale knob, 62, 78 Vibration, DPO3000, 9 Video Autoset, 85 fields, 250 lines, 253 port, 74 projector, 74 trigger, 249 Video trigger, defined, 120 View waveform record, 66 VISA, 40 Voltage, Input P6139A, 11 Voltage, Output, P6139A, 11 Voltage, Source DPO3000, 8 W Wave Inspector, x, 189 Waveform 285 Index adding, 136 display style, 136 intensity, 143 pan, 190, 191 pause, 191 play, 191 play-pause, 193 record defined, 87 removing, 136 search and mark, 194 user marks, 194 zoom, 190 286 Waveform baseline indicator, 71 Waveform record, 87 Waveform record view, 66 Weight DPO3000, 8 Width DPO3000, 8 X display, 138, 139 Z Zoom, 190 button, 59 graticule size, 192 Horizontal, 259 knob, 59, 190 XY cursors, 177 DPO3000 Series Oscilloscopes User Manual ...
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