[linux-dvb] Re: DVB-C status [was:DVB-C in Helsinki]

[Jaakko Hyvätti <jaakko@hyvatti.iki.fi>]

  (I have not yet received other data points, so I'll post on list, I hope
you do not mind.)

On Fri, 16 May 2003, Johannes Stezenbach wrote:
> I have a Siemens rev 1.5.
> I always get AFC values between -30 and -32. The symbolrate is
> always 6900000 in Berlin cable. I get e.g. real f=402.208887MHz
> when tuning to 402.000 MHz.

I guess then for the Siemens card the correct IF is 35937500+208887 (Your
tuning offset) => 36146387 => the 36125000 previously in the sources is
correct for it.

So we need to differentiate between TT and Siemens cards for optimal
tuning. Siemens just is such a quality product it can stand mistuning
easily.  TT cannot AFC with QAM128 more than about +-10 units, 0.06 MHz.

> ves1820_get_symbolrate() can't work because the registers are
> write-only according to the data sheet.

Thanks, I have another data sheet that says they are r/w, but either I
misunderstood it or the sheet is for different revision or something..

Jaakko

-- 
Foreca Ltd                                           Jaakko.Hyvatti@foreca.com
Pursimiehenkatu 29-31 B, FIN-00150 Helsinki, Finland     http://www.foreca.com


-- 
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.