[linux-dvb] Poorly Siemens DVB-C

Gavin Hamill gdh at acentral.co.uk
Mon Aug 8 22:46:04 CEST 2005


On Monday 08 August 2005 21:27, Johannes Stezenbach wrote:

> > status 1f | signal ffff | snr e8e8 | ber 00023744 | unc 00000000 |
> > FE_HAS_LOCK status 1f | signal ffff | snr d9d9 | ber 00023744 | unc
> > 00000000 | FE_HAS_LOCK
>
> signal ffff looks suspicous. 

From my own experiments, the signal seems to be faked as ffff for the duration 
of the dvb_override_tune_delay parameter

> Could it be that your cable company 
> increased the signal level too much? Does a different card or
> a set-top-box work with the signal?

Both my USB DVB-C budget + the real STB work perfectly - the USB box gets a 
lock in about one second (and it uses identical Philips 1516 tuner + VES1820 
FE! )

> I've not much knowledge about the tuner on the Siemens card, but you could
> try to play with the AGC settings, reg0x01 in ves1820.c, where the data
> sheet differs from the code, BTW:

Cool - I'll have a twiddle with that, thanks =)

Cheers,
Gavin.




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