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Performance Verification
5–16
VITS100 NTSC VITS Inserter Instruction Manual
8. Set the VITS inserter VITS Selection DIP switches S2 and S4 for the red
field signal; segments 1, 3, and 4 are open and segment 2 is closed (1011).
9. Set the waveform/vector monitor for Ext Ref + CW.
10. Select DIFF PHASE.
11. Set the red vector to the outer circle and 0_ on the waveform/vector monitor
vectorscope. Set the red bar amplitude to null on the waveform monitor.
12. Select the TSG/SPG Linearity AC Bounce.
13. Check that the red bar phase shifts ≤ 1_ (10 IRE).
14. Cancel Bounce.
15. Move the coaxial cable from the TSG/SPG linearity out to the full field color
bars out.
16. Cancel burst on the TSG/SPG Color Bar.
17. Set the video noise generator Attenuation to + 3 dB.
18. Set the red vector to the outer circle and 0_ on the vectorscope.
19. Check that the sync edge jitter is ≤ 12_ while changing the video noise
generator Attenuation from + 3 dB to –3 dB.
20. Turn on TSG/SPG color bar burst.
21. Return the video noise generator Attenuation to + 6 dB.
22. Set the red vector to the outer circle and 0_ on the waveform/vector monitor
vectorscope. Set the red bar to null on the waveform monitor.
23. Check that the red bar phase changes ≤ 3_ and that the VITS inserter
maintains lock while changing the video noise generator attenuation from
+6 dB to –6 dB.
24. Continue increasing the video noise generator attenuation to –12 dB.
25. Check that the VITS inserter stays locked.
26. Set the video noise generator attenuation to –3 dB.
27. Set the red vector to the outer circle and 0_ on the waveform/vector monitor
vectorscope. Set the red bar to null on the waveform monitor.
28. Check that the red bar phase changes ≤ 2_ as you vary the video noise
generatordB to +3 dB.
29. Return the video noise generator Attenuation to 0 dB.