[linux-dvb] Help with J2 RGB

[Michal Dobrzynski <michal_dobrzynski@mac.com>]

I would like to finally have a clear picture using RGB via the J2 of my 
DVB-S rev1.5 card.

I've spent approximately 40 hours in the last few days trying to 
achieve this but the result has been increasing frustration and the 
destruction of equipment (intentional but regrettable).

I'll try to give a summary of my progress from the start till now:

1. Bought budget DVB-T card no output device.
2. Bought DXR3/H+ card. No good, did not support switching TV to 16:9 
mode.
3. Bought another DXR3/H+ card. This version supported this feature.
4. Output was unreliable and getting RGB out was very risky. Bought 
Matrox G450.
5. High hopes dashed. Linux support less than stellar and interlacing 
of signal via RGB cable FAR from perfect. Also needed too much CPU to 
be practical.
6. Ordered DVB-S rev1.5 card from Germany for a FORTUNE (I'm in 
Australia).
7. Used crappy shielded data cable to get average S-Video picture out 
of J2 to SCART socket (still better than composite).
8. Attempted to use RGB but discovered that the RGB signals were too 
strong. So went back to S-Video.
9. Ordered shitty (didn't find out till I got it) cable from Germany 
(usa-x). Cost me about 40 Euro including shipping and the picture is 
much worse than anything I had ever seen before. It's just a ribbon 
cable going from J2 to the SCART connector with one resistor 
(presumably for the voltage line but I haven't checked).

10. About 40 hours ago I started to attempt to make my own J2 to SCART 
socket. Destroyed a perfectly good (and unique) VGA cable based on tips 
on here. The entire cable is shielded (is this ground?) with the R, G 
and B wires independently shielded (is this R, G and B ground?).

At the J2 end I connected the ground to the shielding and each of the 
RGB grounds to the shielding also. At the SCART end I connected a 75 
Ohm resistor between R, G and B and between their respective shielding 
(all connected to ground at J2). R, G and B as well as the composite 
sync signal and left and right audio are connected from J2 to the SCART 
socket.

The S-Video picture is a little bit worse than via the shitty data 
cable and the RGB signal is very ghosted. It's all quite horrific and 
the stress of soldering these stranded wires to the SCART connector for 
hours and indeed days at a time just to get a picture of decreasing 
quality over is putting me in a homicidal frame of mind.

PLEASE explain to me what I am doing wrong and how to avoid this 
ghosting. Preferably without needing to spend another 40 hours 
soldering. And if you know of any PRACTICAL advice on how to solder for 
a beginner I'd be interested too (and none of that "don't use large 
globs" crap either. It's either huge globs or strands sticking out in 
every direction).

Regards,
Michal



--
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.