Tektronix WFM 601A, Service Manual

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Performance Verification
WFM 601A, WFM 601E, & WFM 601M Service Manual
4–15
11. Monitor Out Gain Accuracy (WFM 601A, WFM 601E only)
REQUIREMENT – Active Video Gain: 700 mV 3%
t. To load the factory preset, press the PRESET button, use the bezel knob
to pick the FACTORY setting, then press the RECALL bezel button.
u. Set the serial component generator output to the 100% Color Bars signal:
Modules DVG1
Signal Sets 525–270
Test Signals Color Bars
Color Bars 100% Color Bars
v. Connect the output from the MON OUT Y/G connector, through a 75
W
feed-through termination, to Ch 1 of the test oscilloscope.
w. Adjust the test oscilloscope to obtain a stable, triggered display.
x. CHECK – the test oscilloscope for a signal amplitude of 679 to 721 mV,
excluding sync.
y. Move the 75
W
cable from the MON OUT Y/G connector to the MON
OUT P
b
/B connector.
z. CHECK – the test oscilloscope for a maximum peak-to-peak signal
amplitude of 679 to 721 mV peak-to-peak.
aa. Move the 75
W
cable from the to the MON OUT P
b
/B connector to the
MON OUT P
r
/R connector.
ab. CHECK – for an overall maximum peak to peak signal amplitude of 679
to 721 mV
pp
.
ac. Disconnect test oscilloscope cable from MON OUT P
r
/R.
12. Black (Blanking) Output Level (WFM 601M only)
REQUIREMENT– 0 mV 35 mV
a. Connect a 75 ohm cable from the Y/G MON OUT connector on the
waveform monitor, through a 75 ohm feed-through termination, to the
test oscilloscope CH 1 vertical input.
b. Set the serial component generator output to the 100% Color Bars signal:
Modules DVG1
Signal Sets 525–270
Test Signals Color Bars
Color Bars 100% Color Bars