[linux-dvb] frequency out of range - Problems

Manu Abraham abraham.manu at gmail.com
Mon Aug 6 18:33:58 CEST 2007


On 8/6/07, Oliver Endriss <o.endriss at gmx.de> wrote:
> Michael Krufky wrote:
> > Manu Abraham wrote:
> > > On 8/6/07, Lars Buerding <lindvb at metatux.net> wrote:
> > >> Hello Manu,
> > >>
> > >>>> I am getting these messages using the latest available tip-version
> > >>>> (v4l-dvb-5bb1af77fdc5).
> > >>>>
> > >>>> ----------------------------------------------------------------------
> > >>>> Aug  6 07:07:17 gwmuc kernel: DVB: frontend 0 frequency 1510000 out of
> > >>>> range (950000..1400000)
> > >>>> Aug  6 07:08:05 gwmuc kernel: DVB: frontend 0 frequency 1958000 out of
> > >>>> range (950000..1400000)
> > >>>> ----------------------------------------------------------------------
> > >>>>
> > >>> In frontends/tda8083.c
> > >>>
> > >>> Look for this:
> > >>>       446             .frequency_min          = 950000,     /* FIXME: guessed! */
> > >>>       447             .frequency_max          = 1400000,    /* FIXME: guessed! */
> > >>>
> > >>> change to line: #447 to
> > >>>
> > >>> .frequency_max = 2150000,
> > >>>
> > >>> This should fix your problem.
> > >>>
> > >>> Manu
> > >>>
> > >> I did that and it looks good - at least I can switch to the channels
> > >> again and can grab a picture inside vdradmin, I am a bit too far away
> > >> from my VDR currently :)
> > >
> > > N' joy :)
> >
> > Manu,
> >
> > Do you have a spec for that demod?  If so, would you kindly update the driver so
> > that users don't have to worry about this issue?
>
> According to the crippled datasheet, a symbol rate from 12..30 MSym/s
> should be correct for the TDA8083.
>
> The Grundig 29504-451 tuner uses the TDA8060 down-converter, which has a
> frequency range from 920..2200MHz.
>
> So the attached patch should fix the range issues. Ok?

Looks fine, since it is greater than the defined spectrum (950 - 2150)
all is well



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