[linux-dvb] SAA7146 (KNC ONE DVB-C): ber values reliable?

thomas schorpp t.schorpp at gmx.de
Sat Aug 26 06:05:07 CEST 2006


Thomas Börkel wrote:
> HI!
> 
> thomas schorpp wrote:
> 
>>> Whatever I do (different cables, changing amplification, switching 
>>> channels), czap always reports a ber of 195000.
> 
> 
>> status SCVYL | signal 8b8b | snr f3f3 | ber 0000001e | unc ffffffff | 
>> FE_HAS_LOCK
>> status SCVYL | signal 8b8b | snr f2f2 | ber 0000001e | unc 00000000 | 
>> FE_HAS_LOCK
>>
>> its static here too on every channel.
> 
> 
> In the meantime, using Google, I found one other owner, that also has 
> exactly 195000. This seems pretty unlikely to me, if the ber value is 
> computed right.
> 
> At the moment, one card has constantly 195000 and the other 101d0. I 
> guess, when I reboot, it's back to 195000 (like it was once, when one 
> card had a ber of 10.
> 
> BTW, czap and femon show different values, if I use femon without a 
> tuning app (like czap) running parallel, is this normal?
> 
> $ czap "das vierte" -c channels.conf
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> 151 DAS 
> VIERTE:762000000:INVERSION_AUTO:6900000:FEC_NONE:QAM_64:2047:2048:1793
> 151 DAS VIERTE: f 762000000, s 6900000, i 2, fec 0, qam 3, v 0x7ff, a 0x800
> status 1f | signal 8484 | snr f4f4 | ber 00195000 | unc ffffffff | 
> FE_HAS_LOCK
> status 1f | signal 8484 | snr f3f3 | ber 00195000 | unc 00000000 | 
> FE_HAS_LOCK
> 
> *CTRL-C*
> 
> $ femon
> using '/dev/dvb/adapter0/frontend0'
> FE: Philips TDA10021 DVB-C (CABLE)
> status 1f | signal 0000 | snr ffff | ber 00969696 | unc 0000000f | 
> FE_HAS_LOCK
> status 1f | signal 0000 | snr ffff | ber 00969696 | unc 0000000f | 
> FE_HAS_LOCK
> 
>> im very satisfied with this device knc1 c plus :)
> 
> 
> Me too. It's just that some apps report broken recordings, when jumping 
> through the recording (playing is OK). I'd like to find out, why.

not here, recordings are ok. 
lets meet in #vdr-portal at irc.vdrportal.de or #linux-dvb at irc.freenode.net
to get it on. starting with the ber issue?

> 
> Thanks!
> 
> Thomas

y
tom



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