[linux-dvb] Re: Budget SU1278 (STV0299/TSA50059) DVB-S corruptionon SOME channels

[Holger Waechtler <holger@convergence.de>]

Andrew de Quincey wrote:
> I've been seeing corruption on seemingly random channels when using these 
> cards with a satellite distribution system (but not when directly connected 
> to a dish).
>
> I mean certain channels are very corrupt, whilst others are fine. e.g. "Al 
> Jazeera" on hotbird is pretty bad, but "TVE International" on hotbird is OK.
>
> Searching on the web led me to a philips document ("su1278.pdf") which  
> describes the optimal settings for the SU1278 on page 10. The driver is not 
> using these right now. I'm experimenting with the recommended ones, and they 
> do seem to help.
>
> Does anyone else have this problem? I don't wanna commit a change to CVS and 
> break everyone's systems. The changes are to use a step size of 1000kHz (as 
> opposed to 125kHz), and use frequency-dependent charge pump settings 
> (currently it is hardcoded to one value only).
>
> I'll post a patch to the list for testing in a bit; the machine is currently 
> inaccessible.
yes, this would be fine, then several people can test the patch and we 
can try to make this as compatible as possible with other cards...

Holger



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