Tektronix WFM 601A, Service Manual

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Performance Verification
4–20
WFM 601A, WFM 601E, & WFM 601M Service Manual
g. Adjust the Active Video Gain using the knob on the serial component
generator to verify signal to graticule accuracy. The two dots should be
centered on the 131 IRE line with video gain set to 100% 2% (98 to
102%).
h. Select GAMUT (IRE) 100 on the waveform monitor.
i. Set Active Video Gain to 75% by typing 75 and ENTER on the serial
component generator key pad.
j. CHECK – for two bright dots on 100 IRE line 2%.
k. Adjust the Active Video Gain using the Navigation Knob on the serial
component generator to verify signal to graticule Accuracy, 75% 2%
(or 73.5 to 76.5%).
l. Select RESET on the serial component generator touch screen.
m. Select the Signal Sets button on the serial component generator.
19. Arrowhead PAL Composite
REQUIREMENT – Signal to graticule accuracy: 2% for 700 mV.
a. Connect a 75 ohm cable from the serial component generator output to
SER Ch A input and terminate with a 75 ohm high-frequency terminator.
b. Press the serial component generator Signal Set button, then use the
touch screen to select the 625–270 Signal Set for the DVG1 module.
c. Select the 100% Colour Bars signal on the serial component generator
touch screen.
d. Select Active Signal Parameters on the serial component generator touch
screen.
e. Select Video on the serial component generator touch screen.
f. Set Active Video Gain to 75% by typing 75 and ENTER on the serial
component generator key pad.
g. Select the GAMUT display on the waveform monitor.
h. CHECK – for two bright dots on the 700 mV line 2%. See Figure 4–4.
i. Select Active Signal Parameters on the serial component generator touch
screen.
j. Select VIDEO on the serial component generator touch screen.
k. Adjust the Active Video Gain using the knob on the serial component
generator to verify signal to graticule accuracy. The two dots should be