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VITS100 NTSC VITS Inserter Instruction Manual
The VITS inserter can also insert a one-line source identification code on any of
the available lines in vertical blanking. The Tektronix VM700A Video Measure-
ment Set can then use this code to identify the source of the signal it is measur-
ing.
Another function of the VITS inserter is Auto VIRS. When Auto VIRS is
selected, the VITS inserter checks the specified lines and fields of the incoming
program video for a VIRS signal. If VIRS is detected, the signal is passed with
no processing; if VIRS is not detected, then the VITS inserter inserts the
internally generated VIRS signal on the specified lines and fields.
Maintaining program channel continuity is one of the main considerations in the
VITS inserter. Therefore, the VITS inserter provides rapid response to signal or
equipment failure. If there is a failure, input video is automatically routed to the
program output through circuitry that that adds delay equal to normal inserter
processing delay.
If video is present but the VITS inserter cannot genlock to it (uncorrected-time-
base video for example), then the program is passed with no VITS inserted. If
there is no video present, or if the power fails, the VITS inserter switches to the
bypass mode immediately.
When the failure is corrected, the VITS inserter passes program video through as
soon as it is present, and begins VITS insertion as soon as genlock is achieved.
The rear-panel REMOTE connector provides limited remote control of the VITS
inserter. This is a 9-pin ground closure system to permit manual switching
between Bypass and Operate modes. In addition, the interface can drive
indicators to mimic the front-panel POWER, BYPASS, and UNLOCKED LEDs.
Accessories and Options
This instrument is shipped with the following accessories:
H This Instruction Manual
H A power cord appropriate to your local AC supply.
Optional configurations of the VITS inserter are available. See Appendix A: Op-
tions for more information.
Source ID
Auto VIRS
Bypass
Remote Control