[linux-dvb] Fix for DTT-CI cards

Hans Gunnarsson hans.gunnarsson at home.se
Tue May 24 21:48:15 CEST 2005


From: Henrik Sjöberg <henke at epact.se>

>>>>Can this be signal strength issues? If so, where can I check the signal
>>>>strength, and how good does it need to be?
>>    
>>You can see the signal strength if you use tzap to zap to a channel. The
>>signal strength is returned as one byte from the card which is then shifted
>>up eight bits. I would give a possible variation between 0x0000 and 0xFF00
>>but I can't remember right now what signal strength I was having. I can look
>>into it tonight.
>>
>>What signal strength and snr does tzap show you?
>>
>>/Henrik
>  

I get the following output when I tzap to TV4:

./project/dvb_trunk/dvb-apps/util/szap/tzap -c channels.conf [0410] -r
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
reading channels from file 'channels.conf'
tuning to 754000000 Hz
video pid 0x0419, audio pid 0x0418
status 00 | signal 0000 | snr 0000 | ber bfff3154 | unc 400e50e9 |
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK
status 1f | signal 1200 | snr 3c00 | ber bfff3154 | unc 400e50e9 | FE_HAS_LOCK


Regards,

Hans


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