[linux-dvb] Bad signal with Nova-T-500

pontoppidan at city.dk pontoppidan at city.dk
Thu Sep 28 07:37:24 CEST 2006


On Wed, 27 Sep 2006 22:52:29 +0200 (CEST), Patrick Boettcher wrote
...
> SNR is zero, because there is no calculation done in the dib3000mc.c 
> for snr.

Well I won't worry about the numbers, then:-)

> BER and UNC are 0, is something not working for you ?

Yes, kind of. I thought 0 was good (I do get an occasional value for ber and 
unc, but they are very low and steady)? When I try to grab to a file using 
dvbstream I just get an empty file. I just read that I can grab to a file 
using tzap so I will try that tonight to test if my problem is with dvbstream.

> Do not compare the "signal strength" with other cards (demodulators) 
> on your system.

No problem yet - my HVR-1300 is lying around on the desk waiting for things 
to start working:-)

Regards,
Thomas

> Patrick.
> 
> On Wed, 27 Sep 2006, pontoppidan at city.dk wrote:
> > Hi,
> > 
> > I finally got the drivers installed for this card thanks to you guys. I 
> > managed to make a channels.conf file using scandvb and it found all the 
> > channels.
> > 
> > But when I use tzap, I get results like this:
> > 
> > using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
> > tuning to 714000000 Hz
> > video pid 0x006f, audio pid 0x0079
> > status 03 | signal 7c35 | snr 0000 | ber 001fffff | unc 00000000 |
> > status 1f | signal 7c38 | snr 0000 | ber 00000000 | unc 000008dd | 
> > FE_HAS_LOCK
> > status 1f | signal 7c32 | snr 0000 | ber 00000000 | unc 00000000 | 
> > FE_HAS_LOCK
> > status 1f | signal 7c38 | snr 0000 | ber 00000000 | unc 00000000 | 
> > FE_HAS_LOCK
> > status 1f | signal 7c29 | snr 0000 | ber 00000000 | unc 0000000e | 
> > FE_HAS_LOCK
> > status 1f | signal 7c3d | snr 0000 | ber 00000000 | unc 00000000 | 
> > FE_HAS_LOCK
> > status 1f | signal 7c22 | snr 0000 | ber 00000000 | unc 00000000 | 
> > FE_HAS_LOCK
> > status 1f | signal 7c1e | snr 0000 | ber 000000c0 | unc 00000000 | 
> > FE_HAS_LOCK
> > 
> > I have used the card with Windows and had very good reception on this mux 
as 
> > well as other muxes with far worse signal (I have several roof antennas, 
and 
> > some channels/muxes are on amplified frequencies - like the one above - 
> > while others are not amplified. In Windows (dvbviewer) I can watch them 
all).
> > 
> > If I run tzap for one of the "bad" channels, ber goes up but the snr is 
> > still 0000.
> > 
> > The output above is for adapter1, but it's exactly the same for adapter0. 
I 
> > also tried running dvbstream, but it just creates an empty file (this 
could 
> > be because of a bad installation though? - I just copied the dvbstream 
> > executable to /usr/bin).
> > 
> > Any ideas?
> > 
> > Regards,
> > Thomas
> > 
> > _______________________________________________
> > linux-dvb mailing list
> > linux-dvb at linuxtv.org
> > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> >




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