Service Information
18
P6021 Instruction Manual
7. Turn on the test equipment.
Figure 6: Connecting the probe to the calibration fixture
8. Adjust the oscilloscope position, triggering, intensity, and calibration
generator amplitude controls until the signal is centered on the display
(approximately five divisions peak to peak at 2 mV/div).
9. For the first 50 ns, aberrations should be within 10% peak to peak. After the
first 50 ns, aberrations should be less than 2% peak to peak. To check for
compliance, follow steps 9a through 9NO TAG.
Termination Sensitivity at 2 mA/mV.
a. Turn on averaging and set the number of averages to 400 for verification,
or 16 for adjustment.
b. Turn on amplitude and peak-to-peak measurement functions. Check that
the amplitude meassurement function is set up to use the histogram
method to determine pulse topline and baseline reference levels.
c. Set the horizontal timebase to 50 ns/div and the pretrigger position to
20%. Adjust the position and trigger controls for a vertically centered
pulse display with approximately 2 divisions of baseline and 8 divisions
of topline displayed. This will allow for an accurate pulse amplitude
reference measurement at 50 ns/div.
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