Performance Verification
2-18 WFM700 Series Waveform Monitors Service Manual
b. Set the vertical scale to 200 mV/div, horizontal scale to 5 ns/div, and the
trigger position to 90%.
c. Set the display style to dots.
d. Set the trigger level to zero, and to neglect glitches of either polarity for
widths to 30 ns.
e. The oscilloscope display should show a few random transitions followed
by 30 ns with no transitions. This is followed by the triggering transi-
tion. See Figure 2--4.
f. When measuring, disregard signal noise. Measure the waveform
amplitude from the centers of the high and low levels in the region from
5 ns to 10 ns before the triggering transition.
g. Note the measurement.
6. Calculate the percent amplitude error using the formula:
Percent Amplitude Error ÆMeasured mV 800 mVÉ
8
7. CHECK that the calculated error is within5%.
Measure amplitude before
triggering transition
Figure 2- 4: SD PIX MON output level performance screen
