tjfs@tadtec.uucp (Tim Steele) (03/17/90)
A Problem: I have a JVC (well, it says Ferguson on the front but it's JVC inside!) video recorder (model FV37H, though that doesn't help) with a thing called a VPT Adapter which decodes Teletext and allows on-screen programming. The VPT adapter has a SCART/Peritel connector. My TV (Ferguson 51G3) has a SCART input. The VPT will either generate composite video or RGB. When set to composite, it outputs +12v on CV Enable, and composite video on CV (pin 20). When set to RGB, it outputs +4.5v on RGB Enable, RGB on the appropriate three pins and *composite video* on pin 20. When RGB Enable is high, the TV expects to see RGB and *sync only* on pin 20. The SCART input board relies on this! Result: plug them together & you get a double screen image in RGB mode. Yecch. I have tried inserting a diode in the CV line, anode towards TV. Surprisingly this generates a perfect picture... for about 1 second. After that, the sync breaks up. There is a large electrolytic each side of the SCART cable (one in the TV, one in the VPT) which are presumably charging up & moving the threshold. Any suggestions for a fix gratefully accepted! Bye for now Tim -- tjfs@tadtec.uucp ..!uunet!mcvax!ukc!tadtec!tjfs Tadpole Technology plc, Titan House, Castle Park, CAMBRIDGE, CB3 0AY, UK Phone: +44-223-461000 Fax: +44-223-460727 Telex: TADTEC G
brwk@doc.ic.ac.uk (Bevis King) (03/19/90)
In article <TJFS.90Mar17122257@tadtec.uucp> tjfs@tadtec.uucp (Tim Steele) writes: >A Problem: > [Stuff about RGB/Comp Video on SCART] Unfortunately problems like this with RGB SCART lines are very common. I am not aware of a solution other than building (or finding) a sync stripper, to turn the Composite video into blanking. Regards, Bevis Bevis King, Systems Programmer | Email: brwk@doc.ic.ac.uk Dept of Computing, Imperial College | UUCP : brwk@icdoc.UUCP 180 Queens Gate, London, SW7 2BZ, UK. | Voice: +44 1 589 5111 x 5085 "Never argue with a computer" ... Avon (Blake's 7)