In article <1093990990.2094...@lotis.uk.clara.net>, Jock <J...@yahooa.com> wrote:
> Does anyone know where I can get a 3 way Scart splitter similar to the > following item, but with a Scart IN socket rather than a captive Scart IN > lead (preferably with a metal rather than plastic 'box')?
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 d...@davenoise.co.uk London SW To e-mail, change noise into sound.
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.
In article <1094076262.4279...@demeter.uk.clara.net>, Jock <J...@yahooa.com> wrote:
> X-No-Archive: Yes > "Jock" <J...@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
In article <1094076262.4279...@demeter.uk.clara.net>, Jock <J...@yahooa.com> wrote:
> 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.
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.
Dave Plowman d...@davenoise.co.uk London SW To e-mail, change noise into sound.
In article <4ce7d3e3dfd...@davenoise.co.uk>, Dave Plowman (News) <d...@davenoise.co.uk> wrote:
> In article <1094076262.4279...@demeter.uk.clara.net>, > Jock <J...@yahooa.com> wrote: > > 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. > 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".
> In article <4ce7d3e3dfd...@davenoise.co.uk>, > Dave Plowman (News) <d...@davenoise.co.uk> wrote: >> In article <1094076262.4279...@demeter.uk.clara.net>, >> Jock <J...@yahooa.com> wrote: >> > 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.
>> 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. ± 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.
In article <mPFZc.303110$gE.96354@pd7tw3no>, Richard Bentley <rjbentley-nosp...@shaw.ca> wrote:
> "charles" <char...@charleshope.demon.co.uk> wrote in message > news:4ce803a4b7charles@charleshope.demon.co.uk... > AGC is typically used on VCRs to ensure correct mod depth and therefore > S/N ratio. ± 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.
>> AGC is typically used on VCRs to ensure correct mod depth and therefore >> S/N ratio. ± 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.
Domestic UK VCRs have AGC as part of the video processing prior to it going to the head to be written. -- Tim Mitchell
