Not sure why sound-in-syncs kit would help to stabilise a video signal.
https://en.wikipedia.org/wiki/Sound-in-Syncs
I've designed a sound-in-syncs remover, since much video equipment doesn't like the mucked-up sync signal that it produces. At the time (c1990) there was a need for a simple and low cost SiS stripper, rather than using an expensive SiS decoder.
Frank, I've attached the relevant file here. Had to change the VHD extension to TXT to get it to load. H2.TXT contains all the data I loaded into the registers.
I'm not sure I understand it all properly now
(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-Syncs
I'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.]