[linux-dvb] Which currently manufactured DVB-T cards does Linux
Andrew de Quincey
adq_dvb at lidskialf.net
Mon Nov 21 11:27:43 CET 2005
On Monday 21 Nov 2005 10:21, Barry Scott wrote:
> Hartmut Hackmann wrote:
> > Hi, Barry
> >> Its reported on TV-card.com that this card cannot lock on to the
> >> +0.167MHz
> >> or -0.167MHz because its also using one of the TDA10045 or TDA10046.
> >> Its going to make the autotune softwares life harder.
> > Sorry, i have no idea what this could mean. Can you please explain?
> > I am currently maintaining the driver for the tda10046 and i don't
> > know about any shortcoming of it.
> Its a problem in the UK. See below.
> > Regarding an offset of 0.167Mhz: This is a full tuning step and there
> > is no need to let the channel decoder compensate such a vast offset.
> > But as far as i remember it is possible to increase the offset search
> > range. This will make locking slower and it will definitely reduce the
> > performance to accept a tune with such an offset.
> It is standard practice in the UK to publish that a transponder is on
> 507.0MHz say but transmit on 507.167MHz or 506.833MHz.
> Being able to set 507.0MHz as the transponder frequency and
> have the card pull in from the + or - 1/8MHz is very useful.
Er, I can confirm that other (TT and KNC1 designed) tda10045 and tda10046
cards work perfectly all over the UK. I don't see why the +/- 0.167Mhz is a
problem - you simply set the tuner to the frequency (including the +/-
0.167Mhz) as published.
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