[linux-dvb] Which currently manufactured DVB-T cards does Linux support?

Barry Scott barry.scott at onelan.co.uk
Mon Nov 21 11:21:08 CET 2005

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.


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