127.01 Intro to Oscilloscope

127.01 Intro to Oscilloscope - PHYSICS 127 EXPERIMENT NO. 1...

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PHYSICS 127 EXPERIMENT NO. 1 INTRODUCTION TO THE OSCILLOSCOPE The aim of this experiment is to familiarize you with the use of a cathode-ray oscilloscope. This instrument will be employed in some of the later experiments, so it is important to clearly understand its operation. A description of the operation of the oscilloscope is given in Giancoli Sec 23-9 page 620. External voltages can be input to the y-axis or vertical amplifiers (on the lower left on the scope) which control the vertical motion of the electron beam and thereby the vertical position of the spot on the phosphorus screen. The voltage on the x-axis amplifiers, controlling the horizontal motion of the cathode beam, is generated internally. The horizontal voltage has a sawtooth shape, moving the spot with constant speed from left to right, and then back almost instantaneously. The horizontal speed (or the frequency of the sawtooth) can be controlled by the "time-base" unit on the lower right. Equipment Oscilloscope, Dry cell battery, 2 function generators. Method Various voltage sources will be connected to the oscilloscope to determine their time variation, period, and frequency. Procedure The oscilloscopes used here are expensive high-quality instruments and should be handled carefully. Do not have the intensity control set too high, and never allow a
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This note was uploaded on 09/27/2009 for the course PHY 126 taught by Professor Staff during the Spring '08 term at SUNY Stony Brook.

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127.01 Intro to Oscilloscope - PHYSICS 127 EXPERIMENT NO. 1...

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