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Video and General Performance Verification
2- 70
WVR6100, WVR7000, and WVR7100 Specifications and Performance Verification
Vary the time base of the reference to measure lock range.
1.
Press FACTORY on the waveform rasterizer.
2.
Connect the TG2000 AVG1 to Composite A and loop through to the Ref
input. Terminate the other side of the Reference loop through.
3.
Press Cmpst A to select the Composite A input.
4.
Press EXT to set the reference to external.
5.
Adjust the AVG1 time base offset to –50 ppm. Confirm that the VECTOR
and WFM displays are stable and that the readout in the lower-left corner of
the display does not indicate an unlocked signal. (It is normal for the system
to momentarily lose lock when the time base is changed.)
6.
Increase the negative time base offset until the system cannot sustain lock.
Record the maximum offset capability in the test record.
7.
Repeat steps 5 and 6 for positive time base offsets.
Apply an NTSC signal with VITC and verify that the VITC is correctly decoded.
1.
Press FACTORY on the waveform rasterizer.
2.
Route the NTSC signal from the AVG1 to the VITC encoder.
3.
Connect the output of the VITC encoder to one of the Composite A input
connectors and terminate the other connector.
4.
Select CMPST A on the front panel.
5.
Press CONFIG to display the Configuration menu. Select LTC/VITC from
the submenu and then select VITC.
6.
Press CONFIG again to exit the menu.
7.
Verify that Decoded VITC is displayed in the lower-right corner of the
waveform rasterizer display.
8.
Verify that the VITC is correct and record pass or fail in the test record.
External Reference Lock
Range
(Option CPS only)
VITC Decoding
Functionality
(Option CPS only)