[linux-dvb] Re: Problem with low frequencies on DVB C card

[Holger Waechtler <holger@convergence.de>]

Hi,

jan.b wrote:
> hi some low frequencies under 131 Mhz seems not to work on my peanut vdr
> i checked them in windows they seems ok
> 
> when i look into DVB/driver/tuner.c i see that some ranges seems a 
> little high to me
> maybe it s not a known bug since all the cable.conf i ve seen were 
> german and with mid frequencies only

that's exactly the problem, we can't test the unusual frequency bands 
here. Please download the datasheet of the PLL and try to play with the 
5 byte string you send to the tuner.

Maybe you have to use a smaller frequency divisor for low frequencies, 
maybe you have to try other charge pump current settings. Send me a 
patch when you can fix a problem.

Please use the NEWSTRUCT branch for experiments, there you have much 
more flexibility to set up the PLL, in tuner_set_frequency() 
(frontends/ves1820.c) you can apply different settings for each 
frequency range. Look in the grundig_29504-401 example to see how it's 
done there.

Holger




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