[linux-dvb] FIX: No recovery after lost lock

Marian Durkovic md at bts.sk
Tue Sep 27 12:11:30 CEST 2005


> > Anyway, recovery seems to be faster without fine-tuning, at least with
> > my Nexus, higher symbol rates and a good signal...
> 
> Hmm, weird, I added the enhanced code because thats what hauppauge appeared to 
> be doing, and I thought it seemed to work better at the time.... however 
> looks like that isn't the case. I've no problem if you want to rip it out.

Actually I did some further testing and the use of derotator has a very bad
side effect - it reduces the available SNR. The higher is derotator_freq,
the lower is SNR. In my setup, when derotator is set for > 9 MHz, I can't get 
the lock anymore (of course I have properly shifted the tuning frequency).
It's far better to perform normal tuning, which does not reduce the SNR.

Thus I'd suggest to remove the enhanced tuning section and use standard
tuning for zigzags.


	With kind regards,

		M.



More information about the linux-dvb mailing list