[linux-dvb] KNC1 TV Star DVB-S tuning problem

Doru Marin Doru.Marin at Deuromedia.ro
Mon Jan 28 20:50:54 CET 2008


Hello,

I got two KNC DVB-S cards, an older one (1894:0010) and a new KNC TV 
STAR model, (1894:0016) on  FC6 running last kernel (2.6.24).
The old card works fine, I have no problems with it. The second one, 
after I tune o a channel on a vertical polarity, doesn't want to tune on 
any horizontal channel anymore:

# szap -c ./astra.conf -a0 "BBC World"
reading channels from file './astra.conf'
zapping to 3 'BBC World':
sat 0, frequency = 11597 MHz V, symbolrate 22000000, vpid = 0x00a3, apid 
= 0x005c sid = 0x2742
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
status 03 | signal d9a0 | snr 965d | ber 0000db00 | unc 00000000 |
status 1f | signal e100 | snr dd9d | ber 00005e00 | unc 00000000 | 
FE_HAS_LOCK
...........
#  szap -c ./astra.conf -a0 "ZDF"
reading channels from file './astra.conf'
zapping to 161 'ZDF':
sat 0, frequency = 11953 MHz H, symbolrate 27500000, vpid = 0x006e, apid 
= 0x0078 sid = 0x6d66
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
status 03 | signal b3e0 | snr 9be2 | ber 00009e00 | unc 00000000 |
status 03 | signal b3d1 | snr a71c | ber 0000ff30 | unc 00000000 |

Back to "BBC World", it locks fine. but no chance to lock on ZDF anymore.
If I replug the sat cable, it starts to work again, until I switch again 
on a "V" channel.
I checked the polarity switch, the card delivers 19.2V, so there is no 
power problem.
The difference between cards is the tuner, the new one uses a Philips 
SD1878.
As long as the first card works like charm, I assume the the sat switch 
works fine.

Any idea what goes wrong, anyone ?

Regards,
Doru




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