Date   : Tue, 17 Jan 2006 20:24:14 +0000 (GMT)
From   : Sprow <info@...>
Subject: Re: Master to SCART

In article <TEw3VLASaiuDFwlm@...>,
   Mike Tomlinson <mike@...> wrote:
> In article <43B99EAE.70603@...>, Peter Hicks
> <peter.hicks@...> writes

> >Anyone got ideas?
>
> I doubt it's the sync level.  

I tend to think it might be. The instructions seem quite odd, if we assume
the sync is driving into 75R (as it's on the normal composite input) then
it's going to be about
 5 * 75/(270+75)
or 1.08V, that's huge for a composite sync, which would normally be about
0.3V.

As the RGB lines don't carry any sync information, it's possible that the TV
is also recovering the black level from the back porch region of the sync.

I would favour series 1N4148 diodes myself, else a larger resistor, say
470R. Infact it seems odd to suggest needing 220 and 270R parts - maybe it's
a typo in the translation to the webpage?
Sprow.

> How long is the cable, is it screened, and
> if so, have you connected the screen to the plug screen at both ends?