Tektronix WFM 601A, Service Manual

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Performance Verification
4–16
WFM 601A, WFM 601E, & WFM 601M Service Manual
c. Select the following on the test oscilloscope.
Coupling DC
Volts/Div 50 mV
Trig Source CH 1
Sweep 10
m
s
d. Adjust the trigger on the test oscilloscope for a locked display.
e. Select Ground on the test oscilloscope CH 1 input and adjust the trace to
the center line on the graticule.
f. Select DC coupling on test oscilloscope CH 1 input.
g. CHECK – that the Black (blanking) Level is 35 from the ground
reference.
h. Repeat steps d through g after moving the 75 ohm cable on the waveform
monitor Y/G MON OUT to each of the P
b
/B and P
r
/R MON outputs.
i. Remove the cable from the P
r
/R MON OUT connector on the waveform
monitor.
13. Vector Horizontal and Vertical Gain Accuracy
REQUIREMENT – Vertical: 700 mV = 10 divisions of deflection 1%;
Horizontal: 700 mV = 8 divisions of deflection 1%.
a. 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
b. Select VECTOR VIDEO DISPLAY.
c. Turn off the generator B–Y output. See page 5–11 for instructions on
turning off the TG2000/DVG1 outputs.
d. Vertically position the display between the – 0.3 and 0.7 graticule lines.
e. CHECK – for 10 divisions of deflection 0.5 minor divisions.
f. Turn on the serial component generator B–Y output.
g. Turn off the serial component generator R–Y output.
h. Horizontally and vertically position the display over the center eight
divisions of the graticule 0 line.
i. CHECK – for 8 divisions of horizontal deflection, 0.4 minor divisions.