Tektronix WFM700 Series, Service Manual

Page: 43 / 194

Performance Verification
WFM700 Series Waveform Monitors Service Manual
2- 11
7. CHECK that the steps in the displayed ramps are monotonic (all steps are in
the same direction) and approximately one pixel high. See Figure 2--1.
NOTE
. If the steps are 4 pixels high, it may be that the input signal has only 8
bits of resolution.
8. Press the GAIN button.
9.
Touch
Gain: 10x
.
10. CHECK that the steps in the ramps are 0.7 mV to 0.9 mV. (Use the voltage
cursors for this measurement.) See Figure 2--2.
11. Press the WFM button.
12. Touch Pb to turn on the Pb component.
13.
Touch
Y
to turn off the Y component.
14.
Press the
GAIN
button.
15. Touch Gain: 1x.
16. CHECK for step direction and height by repeating steps 7 through 10 above.
17. Press the WFM button.
18. Touch Y and Pr to turn these components back on. All components should
be on (Y, Pb, and Pr).