[linux-dvb] Re: DVB-S Rev1.5 RGB out nightmare

[Helmut Auer <vdr@helmutauer.de>]

Michal Dobrzynski wrote:

> Si it looks like I may have made a very expensive mistake ordering a 
> card from overseas. I've followed the diagram at 
> http://www2.arnes.si/%7Emthale1/rgb.html to create a cable to connect 
> the card via J2 to my TV and the best I have been able to get is a 
> garbled, scrolling mass of junk (only barely recognizable as the TV 
> image) if and only if I set the TV input to VHS , SVHS or automatic 
> VHS/SVHS.
>
> If I set the input to RGB or any other setting I get "No Signal". The 
> composite TV out and audio out on the back of the card work fine 
> (though the image quality is terrible when even compared to the SVideo 
> out of my DXR3's). I do not have the Composite connected to the back 
> of the card when I try to get RGB out via J2. Incidentally I also seem 
> to get no analogue audio out of J2 when the wires are connected as 
> instructed.
>
> I've inspected the cable dozens of times and tested it with a 
> multi-meter to make sure signals are going where they should. and that 
> there is no leakage I have tried with both a 47ohm and a 100ohm 
> resistor. My TV is a Loewe Credo with which I use a Loewe RGB capable 
> DVD player and RGB out from a Matrox G550. The input which I am 
> connecting J2 to definitely supports RGB and I know how to configure 
> the TV to accept an RGB signal.
>
> Can anyone help me in any way? Even if it's just providing alternative 
> (even if they are identical) J2 to RGB schematics. I'm desperate.
>
> Regards,
> Michal
>
> P.S. Because I know there is a risk of damaging the TV out component 
> of the card and I do not know the procedure to connect things safely I 
> go out o my way to avoid problems. I shut down the computer and turn 
> the TV off  and then unplug both from their power-points before I 
> connect or disconnect cables to the card at the J2 end or the TV end. 
> Just in case,
Hello,
The main Problem can be the cable you are using, and the length of it.
I would suggest to connect the J2 to a female SCART connector with a 
short ( and if possible shielded ) cable connection ( ~ 30 cm ).
You have to be aware that in this cse the pins 1-2, 3-6 and 19-20 must 
be crossed.
Then take a high quality Scart-Cable and it should work fine

--
Helmut Auer, helmut@helmutauer.de 



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