Re: Debugging the PCTV PRO Radio problem

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On Tue, Jan 07, 2003 at 07:41:02PM +0100, Gunther Mayer wrote:
> Marius Kotsbak wrote:
> > I have started reviewing the code in tuner.c to find why the radio on
> > PCTV PRO with MT2030-tuner isn't working.
> 
> Yes, radio doesn't work on 3fdx Voodoo200/ TV/FM neither for which
> I implemented mt203x tuner support. Though I don't know why.

OK

What about the message:
tuner: radio freq set to 400.00
tuner: radio freq (400.00) out of range (65-108)
? Is this normal for radio tuning?


> 
> Note the Pinnacle PCTV MT203x-type card has other chips in the audio path too,
> e.g. SAW filters or tda988x chips, so consider these too !

OK, but I first check the code that handels radio different from TV
sound, as TV audio work without problems at all.

> The spurcheck is a red herring (it never triggers for FM).

OK, I also read that, but it might be a problem for TV tuning (although
not for my channels).

> 
> > 
> > First I need to know if it has worked well before?
> > 
> > I have found one possible error source, and that is the spurcheck, which
> > is as I can see missing. The mt2032_spurcheck() just print some
> > debug-information, but never touch other than local variables, don't
> > talk to any hardware, and always return 1. Where it is called, it is
> > commented "should recalcuulate lo1...".
> > 
> > What I am not sure of is if this is necessary for radio tuning. In the
> > datasheet it is noted that the spur removal isn't required for north
> > Ameracan FM, which seems to have the same range as the norwegian (which
> > doesn't work well).
> > 
> > Does anyone (particulary the driver authors) know any other part of the
> > code I can search for errors? The symtoms as I have said is that the
> > tuning of radio is bad, som I can only hear sound some seconds before it
> > turns the sound off. Sound might come back later automatically and
> > last for some seconds.
> > 
> > Marius K
> > 
> > 
> > 
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> > 
> 
> 
> 
> 
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