Tektronix WVR6020 - Page 91

Video and General Performance Verification
HD SDI I nput Level Low
andHigh(Opti
on HD)
This test uses t
he serial output with adjustable level to verify that the waveform
rasterizer can accept serial signals of various amplitudes.
1. Press FACTORY
, and then press the DISPLAY SELECT 4 button.
2. Press a nd hold STATUS to display the pop-up menu, and then select Video
Session.
3. Connect a cable from an TG2000 HDVG1 output to the HDST1 video input.
Press STATUS again to remove the pop-up menu.
4. Connect a cable from the HDST1 STRESS output to one of the SDI Input A
connectors on the waveform rasterizer.
5. Terminate the other SDI Input A connector.
6. On the TG2000 HDVG1, set the output to the SDI Matrix signal.
7. You should see a stable picture and waveform on the waveform rasterizer
display. The status screen should display OK for Y Chan CRC, C Chan CRC,
Y Anc Checksum and C Anc Checksum errors.
8. On the TG2000 HDST1, adjust the serial amplitude downward to find the
lowest level that does not generate any CRC errors in a 10 second period.
9. Record the HDST1 Amplitude Level in the test record.
10. Increase the HDST1 Amplitude Level to 130%.
11. If any EDH errors are generated, reduce the amplitude until no errors are
generated for a 10 second period.
12. Record the HDST1 Amplitude Level in the test record.
13
.
Re
peat the test using SDI Input B on the waveform rasterizer.
14. Record the HDST1 Amplitude Level in the test record.
Waveform Rasterizers Specifications and Performance Verification 7 7