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[Q8] Make a drawing of each waveform, with the DC OFFSET set to 0V. Show the gridlines of the oscilloscope in your
drawing.
Again, switch between the Sine, Rectangle, and Triangle functions. Now, set the DC OFFSET control to +2V. Use
the AUTOSET button to display each waveform. [~10 min.]
[Q9] Make a drawing of each waveform, with the DC OFFSET set to +2V. Show the gridlines of the oscilloscope in
your drawing.
d. Pulses: [~5 min.]
Set the function generator to each of the last 2 functions. Set the DC OFFSET so that each waveform is unipolar
and positive-going from 0V. Study their waveforms.
[Q10] Measure the duty-cycle of each of these waveforms.
d. Triggering: [~5 min.]
With the sine or triangle functions that you were using, adjust the triggering knob. Observe what is happening
to the waveform as you adjust the trigger knob.
[Q11] Where does the trigger level have to be in order to see a stable display?
When you set the trigger to be above or below the waveform, what happens?
B. RMS vs. Peak Values of Periodic Waveforms (15-20min: estimated amount of time)
1. Use the scope to set the function generator to produce a 100Hz sine wave, with a 2V peak-to-peak amplitude.
(Not that this is a 1V peak value of the sine wave.) Manually adjust the time base to display about 2 complete
cycles of this waveform.
[Q12] Make a drawing of this waveform, showing the gridlines of the oscilloscope.
Next, connect the Agilent DMM to the output of the function generator (in parallel with the scope). Use a BNC
“T” connector to do this. Set the DMM to read AC volts (“AC V”)
[Q13] What is the RMS measurement from the DMM? Compare the value to the theoretical value for a sine wave.
(They should match, as this is a “True RMS-reading” DMM).
[Q14] What is the RMS measurement on the scope? Compare to the value obtained on the DMM. Do they match?
(Does the scope accurately calculate the RMS value?)
2. Repeat for a square wave having a peak voltage of 1V (2V Pk-Pk).
[Q15] Make a drawing of this waveform.
[Q16] What is the measured RMS value?
3. Repeat for a triangle wave having a peak voltage of 1V (2V Pk-Pk).
[Q17] Show this waveform in your lab notebook.
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