[linux-dvb] Poorly Siemens DVB-C

Johannes Stezenbach js at linuxtv.org
Tue Aug 9 12:44:07 CEST 2005

Robert Schlabbach wrote:
> From: "Johannes Stezenbach" <js at linuxtv.org>
> > signal ffff looks suspicous.
> IIRC, the Siemens DVB-C card does not use the VES1820 AGC output, it is not
> connected. Instead, the internal AGC of the TDA9819 IF amplifier is used.
> Thus, the AGC register always reads 0xFF, but this has no meaning.
> There is no way to read the signal strength with this board.

Funny that I never noticed that. Maybe I never paid attentions
since my card works...

Also, the TDA9819 has a DVB-AGC input, why the hell did the
Siemens guys not connect this to the ves1820?


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