[linux-dvb] TT-Budget C-1501

Stephen Dawkins elfarto at elfarto.com
Tue Apr 22 15:04:38 CEST 2008


Sigmund Augdal wrote:
> tor, 17.04.2008 kl. 23.31 +0200, skrev Hartmut Hackmann:
> <snip>
> 
>>Do you have a datasheet of the tda10023? From the first glance, i have the
>>impression that it was only used with a conventional tuner yet. With the
>>silicon tuner, the chip needs to be programmed to use a different IF. We
>>beed to find out how this is done.
> 
> I don't have any datasheet.

I asked NXP for the datasheets for the TDA10023 and the TDA8274A, but 
they require a NDA to be signed to obtain them.

> I tried playing around with some of the
> values in the init-tab, and they do affect the signal levels (signal and
> snr) reported, but I haven't managed to find something that does give a
> lock. There is also a if_freq variable in the current driver sources
> that does not seem to be passed to the chip directly but is used in some
> computations. In the current driver this value is selected based on
> channel bandwidth (being only used for dvb-t this far). I've tried with
> several values for this (8MHz, 0MHz, 4MHz and the currently used 5MHz
> for 8MHz bandwidth channels).
> 
> Birr: Do you have any info on this, as you seem to be the last developer
> working on that demod?
> 
> Best regards
> 
> Sigmund Augdal
> 
>>Best regards
>>   Hartmut

Regards
Stephen



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