extracting H/V sync from sync-on-green video signal?

[Pete Turnbull]

On Jan 30 2005, 21:08, der Mouse wrote:
> > I keep on finding sync combining circuits that'll do seperate sync
to
> > sync on green everywhere, but nothing to do the reverse!
>
> I thought the right thing there was to simply connect the green
output
> to both the green video input and the sync input.
>
> However, that's coming from someone who has never tried it (at least
> not knowingly - I may have used adapters designed to do just that)
and
> who does not really understand the signals involved....

Hmm, now that you mention it, I remember trying something like that
several years ago, when we had to have an SGI (RGB, SOG) drive a video
projector (RGB, CSYNC).  We had a 13W3-to-3xBNC cable and put a BNC
T-piece on the green, with a short coax to the CSYNC BNC on the
projector.  It worked well enough, even though the T-piece and cable
were 50-ohm cheapernet parts.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York