[linux-dvb] tzap output concerns

Manu Abraham abraham.manu at gmail.com
Mon Sep 24 04:22:39 CEST 2007


Dan Harper wrote:
> Hi,
> 
> I've been having some problems with my Nova T 500 so I decided to do  
> some more sniffing around to see if I could turn up the reason for  
> the problem.  I decided to run tzap and study the output, here's what  
> I got:
> 
> beastie:~# tzap "ABC TV"
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> tuning to 226500000 Hz
> video pid 0x0200, audio pid 0x028a
> status 07 | signal 83ea | snr 0000 | ber 001fffff | unc 00000000 |
> status 1f | signal 839f | snr 0000 | ber 00019a90 | unc 00000ad0 |  
> FE_HAS_LOCK
> status 1f | signal 840c | snr 0000 | ber 000057a0 | unc 00000000 |  
> FE_HAS_LOCK
> status 1f | signal 83e8 | snr 0000 | ber 00006520 | unc 00000000 |  
> FE_HAS_LOCK
> status 1f | signal 83eb | snr 0000 | ber 0000a9c0 | unc 00000000 |  
> FE_HAS_LOCK
> status 1f | signal 83aa | snr 0000 | ber 00008250 | unc 00000000 |  
> FE_HAS_LOCK
> status 1f | signal 83a5 | snr 0000 | ber 0000e9c0 | unc 00000000 |  
> FE_HAS_LOCK
> 
> Now, from the Wiki (http://www.linuxtv.org/wiki/index.php/Zap) it  
> doesn't look good, I think my snr is wrong and my ber is too high.   
> Can anyone confirm?

Please don't bother much about these statistics. These are a bit useless
in most cases, ie it does vary driver to driver how it is implemented.

Manu




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