[linux-dvb] Hauppauge WinTV Nova-T USB2 not tuning

Patrick Boettcher patrick.boettcher at desy.de
Wed Jun 29 19:27:26 CEST 2005


On Wed, 29 Jun 2005, Johannes Stezenbach wrote:

> Patrick Boettcher wrote:
>> On Wed, 29 Jun 2005, Ville Mauriala wrote:
>>> mauri:~$ dvbtune -f 666000 -qam 64 -gi 8 -cr 2_3 -bv 8 -tm 8
>>> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
>>> FE_HAS_SYN
>>> Event:  Frequency: 676600000
>>
>> Why does dvbtune is trying 676 MHz, when you requested 666MHz?
>
> I think the frontend event reports the frequency where
> the frontend has actually locked (after zig-zag, and with
> AFC offset reported by FE_GET_FRONTEND).

The dib3000mc-driver does not read back the frequency in get_frontend, but 
uses the old value from set_frontend.

And in get_tune_settings it does not touch max_drift and step_size 
+ tune_settings is memset to zero before calling get_tune_settings.

Not sure if it is a driver-mistake.

Patrick.

--
   Mail: patrick.boettcher at desy.de
   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/




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