Video and General Performance Verification
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WVR6100, WVR7000, and WVR7100 Specifications and Performance Verification
Apply a small DC voltage and verify that it is not clamped to zero.
1.
Press FACTORY.
2.
Disconnect all terminators from the Composite inputs.
3.
Connect a cable from a Composite A connector to the retractable hook clip.
4.
Select CONFIG > Composite Input >DC Restore > Off.
5.
Press CMPST A and FULL.
6.
Press VAR and then use the GENERAL knob to reduce the gain to 0.5X
7.
Hold the hook tips on the battery, red to positive, black to negative.
8.
Verify that the waveform is offset up about 1.5 volts and is not being
clamped to ground.
9.
Record pass or fail in the test record.
Apply hum, and then measure the attenuation with clamp in all three modes.
1.
Press FACTORY.
2.
Connect an NTSC color bar signal to the video input of the AVC1. Route the
video output of the AVC1 (not the precision video output) to the Compos-
ite A input of the waveform rasterizer.
3.
Set the AVC1 for 0 dB of 60 Hz hum.
4.
Press FIELD twice to get a 2-field sweep.
5.
Select CONFIG > Composite Input > DC Restore > Off.
6.
Press CURSOR and measure the peak-to-peak hum with the cursors. The
measurement should be about 714 mV.
7.
Select CONFIG > Composite Input > DC Restore > Fast.
8.
Measure the peak-to-peak hum with the cursors. It should be less than 5% of
the measurement in step 6.
9.
Record the value in the test record.
10.
Select CONFIG > Composite Input > DC Restore > Slow.
11.
Measure the peak-to-peak hum with the cursors. It should be between 90%
and 110% of the measurement in step 6.
12.
Record the value in the test record.
Composite Analog Input
Clamp Off Check
(Option CPS only)
Composite Analog Input
DC Restore Hum
Attenuation
(Option CPS only)