Lab 2 - Speed of Sound &amp; O-scope

Lab 2 - Speed of Sound &amp; O-scope - Introduction to...

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7/07 1 Introduction to the Oscilloscope 1. Purpose To gain exposure to the controls and features of an oscilloscope as related to wave phenomena such as interference and harmonics. 2. Theory This lab will introduce you to the general operation of the oscilloscope as well as show you some of the features available. The equations needed to complete the analysis of this lab are in the sections below and/or have been discussed in a previous lecture. [The oscilloscope is used as a tool for testing electrical components and circuits. By setting the oscilloscope in parallel with various components in a circuit, voltage across the component can be accurately read and analyzed. Both DC and AC can be evaluated using the oscilloscope. For a DC voltage, the screen will display a straight line, for AC, the screen will show a sinusoidal wave.] NOTE: PH 4C students are responsible for reading, but NOT for comprehending the material in the above square brackets. If you have taken PH 4B then you should understand this! 3. Equipment Speaker Oscilloscope Function Generator Power cord 2 Patch Cords / Test leads AC Transformer Microphone Open Plastic Pipe Reed Pipe, Synthesizer, Guitar 4. General Setup Provide power to the Oscilloscope and the Function Generator. Turn both pieces of equipment on. Attach the patch cords to only the Function Generator. A Note on the Oscilloscope The controls for the oscilloscope are separated into four different vertical sections. The first section contains the controls that affect the oscilloscope itself. Intensity controls the brightness of the beam. Focus controls the “sharpness” of the beam. Power is used to turn the scope on and off. The second section (VERTICAL) contains the controls that affect the vertical displacement or height of the display. The third section (HORIZONTAL) contains the controls that affect the horizontal movement and time delineation of the scale on the screen. The fourth section (TRIGGER) contains the controls that help feed the correct information from the inputs into the scope.

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7/07 2 5. Experiments A. Time and Frequency Measurements 1. Set the MODE switch under TRIGGER to P-P AUTO/TV LINE, the left switch under SOURCE to CH 1, and turn the inner knob of the SEC/DIV control, under HORIZONTAL, fully clockwise until it clicks. 2. On the function generator, there should be a two-socket plug in the output port marked 50/600 Ω . Connect both patch cords into the plug, one cord for each socket. On the oscilloscope, there should be at least one of the same kind of two-socket plug in the port marked CH1 in the VERTICAL section. If not, find and/or move the plug to CH1. Connect the other ends of the patch cords to this plug. Immediately above the CH1, there is a toggle switch marked AC GND DC. Place the switch over AC. 3.
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Lab 2 - Speed of Sound &amp; O-scope - Introduction to...

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