02-09-2023, 02:42 PM
(This post was last modified: 02-09-2023, 02:45 PM by Mike Watterson.)
(01-09-2023, 04:23 PM)ppppenguin Wrote: Not sure why sound-in-syncs kit would help to stabilise a video signal. https://en.wikipedia.org/wiki/Sound-in-SyncsI'm guessing because it must have had some sort of timebase corrector and generated new sync pulses? I'm not sure that the CTA* guys explained or knew why, but the monitor on the CTA vision rack certainly was stable on output and not on direct. I saw the difference. The SIS boxes were rarely used for this.
Quote:… a sound-in-syncs remover, since much video equipment doesn't like the mucked-up sync signal that it produces.That would be why they used the SIS decoder as well as the SIS coder.
Sadly this gives little history and I don't remember when they became more common as an add-on to existing machines (possibly U-matics in late 1970s advertising edit places).
https://en.wikipedia.org/wiki/Time_base_correction
[Central Technical Area, manned mostly by Communications Engineers. Basically non-studio and non-broadcast site people. The same staff also were with OBs for cable or microwave link management.]
