Service Information
24
P6021 Instruction Manual
4. Turn on the calibrator output.
5. Adjust the digital oscilloscope triggering for a centered waveform of
approximately 300 mV
p-p
.
6. Adjust the fine volts/div for a near full-screen vertical waveform. Nominal
deflection at 50 mV/div will be 6 divisions. A digitizer with adjustable
volts/div can increase resolution to approximately 8 divisions.
7. Choose the peak-to-peak measurement function of the oscilloscope and
fine-adjust the calibrator output for a 300 mV
p-p
digitizer reading by
selecting and varying the % delta output control of the calibrator.
8. Turn on averaging (16 or greater), and readjust the calibrator output if
necessary to obtain a stable 300 mV
p-p
reading. Allow sufficient time for the
measurement to update with averaging turned on.
9. If your digitizer only supports cursor measurements, adjust the cursor
readout for the nominal 300 mV
p-p
and adjust the calibrator output for a
peak-to-peak amplitude waveform that corresponds to the cursor settings.
You may have to adjust the oscilloscope offset to center the waveform
between the cursors.
10. For the remainder of this test, 300 mV
p-p
is the reference reading .
11. Change the calibrator output frequency to 120 Hz.
12. Set the oscilloscope horizontal sensitivity to 2 ms/div to obtain a centered
waveform. Turn averaging off to provide for a quicker waveform update.
13. Turn averaging on.
14. Allow the oscilloscope averaged reading to stabilize. The peak-to-peak
amplitude reading must be ≥ 212 mV
p-p
(0.707 * 300 mV
p-p
reference
amplitude). If using statistical averaging, allow enough update time for the
mean value to stabilize.
15. If using cursors to take this measurement, adjust the cursors to measure the
peak-to-peak amplitude. Use averaging if possible.
16. Set the calibrator % delta to off.
17. Set the calibrator output to off.
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