Maplin do one were the two 'outputs' are switched. Possibly easy enough to
remove the switch.
Doubt you'll find one in metal, though.
--
*He's not dead - he's electroencephalographically challenged
Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.
No idea what that reference is but:-
I buy from a firm called Satcure. He does metal box scart switches.
Alternatively you could try a man called John Sim who runs a company
with a name like rgbtosvideo.com. He does scart splitters that are not
with a manual switch.
Rgds
Tony Gamble
London SW6
Ex Rediffusion and LWT
> "Jock" <Jo...@yahooa.com> wrote in message
> > X-No-Archive: Yes
> >
> SNIP
> >
> >
> >
> Thanks for the replies - just to clarify, it is not, AFAIK, a Scart
> switch box that I'm after, it is a splitter i.e. the Scart In comes from
> a source (satellite receiver), and the 3 Scart Out sockets are connected
> to three VCRs, to allow the output of the receiver to be recorded by any
> of the VCRs, at any time without needing to select an output.
> BTW, from what I have seen, Maplin have what I am looking for in metal,
> but with a captive lead.
CPC www.cpc.co.uk have 2 way, 5 way & 10 way SCART amplifier/splitters
You might well find this doesn't work properly. Vision signals are
correctly terminated, and paralleling three inputs will mess this up. So
saying, the AGC on the VCRs may or may not recover it. But what you really
need is a distribution amplifier - they're not expensive.
--
*One of us is thinking about sex... OK, it's me.
> You might well find this doesn't work properly. Vision signals are
> correctly terminated, and paralleling three inputs will mess this up. So
> saying, the AGC on the VCRs may or may not recover it.
I wouldn't expect to find agc on the video inputs. It's normally an "RF
input thing".
AGC is typically used on VCRs to ensure correct mod depth and therefore S/N
ratio. ą 6dB of AGC is typical which gives an input range of 0.5-2 Volts p-p
of video. This is why Macrovision copy protection on tapes and DVDs causes
problems. The copy protection signal consists of a pulsating white level
which varies up to 1.5 Volts p-p video or greater during the vertical
blanking and causes the AGC to respond, possibly because the FM modulator
detects clipping. AFIA the AGC uses the sync tip to black level as the
reference, so an ultra-white level clipper is necessary (say 110%) on the
incoming video to clean up the copy protection signal. problem.
Cheers,
Richard
> "charles" <cha...@charleshope.demon.co.uk> wrote in message
> news:4ce803a4...@charleshope.demon.co.uk...
> AGC is typically used on VCRs to ensure correct mod depth and therefore
> S/N ratio. ą 6dB of AGC is typical which gives an input range of 0.5-2
> Volts p-p of video. This is why Macrovision copy protection on tapes and
> DVDs causes problems. The copy protection signal consists of a pulsating
> white level which varies up to 1.5 Volts p-p video or greater during the
> vertical blanking and causes the AGC to respond, possibly because the FM
> modulator detects clipping. AFIA the AGC uses the sync tip to black
> level as the reference, so an ultra-white level clipper is necessary
> (say 110%) on the incoming video to clean up the copy protection signal.
> problem.
Certainly the only 2 machines I had circuit info for didn't have agc. I
wonder if it is a left of pond - right of pond thing. We certainly use
different tv systems.
SNIP
>
>
>
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>
Thanks for all the replies - I'll try one of the captive lead versions, and
if that isn't suitable, I guess it's a distribution amp for me!
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