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

[Andrew de Quincey <adq_dvb@lidskialf.net>]

> > BTW: I also found an issue with low symbol rates: The STV0299B datasheet
> > says that the gain CFD[6:4] MUST NOT exceed the coefficient e[3:0], as
> > that may lead to instability. But when you take the recommended STV0299B
> > settings from the SU1278 datasheet, that is the case for symbol rates <5
> > MBaud. Since I do not receive any transponders with such a low symbol
> > rate, I have not been able to verify if there is indeed a problem...
>
> I've found all the settings for symbol rate-related calculation in the
> stv0299.c linux driver differ from the recommended values for the SU1278SH.
> I think I'll see if my modifications to the tsa5059 code fix the problem
> first though..

I should clarify that; I don't mean that the settings are rubbish or anything; 
I just mean they are probably not optimal for the SU1278SH. I'll make sure to 
keep the existing settings for non-SU1278SH tuners.



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