[linux-dvb] low STR with vdr and good STR with tzap on DVB-T channels

[Stefan Hußfeldt <stefan@hussfeldt.de>]

Hello,

i use a Siemens FF DVB-C together with an Airstar2 DVB-T¹ with 2.6.10-rc3 and
CVS dvb-kernel from today. When i tune with tzap and watch with mplayer
i have a good signal and picture on the DVB-T channels:

|[stefanh@zaphod stefanh]$ tzap -a 1 -r "ZDF"
|using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
|reading channels from file '/home/stefanh/.tzap/channels.conf'
|tuning to 490000000 Hz
|video pid 0x0221, audio pid 0x0222
|status 00 | signal 973f | snr 0000 | ber 00000000 | unc 00000000 | 
|status 1f | signal 973f | snr 9a9a | ber 00000000 | unc 00000000 | FE_HAS_LOCK
|status 1f | signal 973f | snr 9b9b | ber 00000000 | unc 00000000 | FE_HAS_LOCK

Tuning and watching (via FF DVB-C) with vdr-1.3.17 results in low STR and 
glitches on the DVB-T channels. femon output:

|Dec  9 14:33:16 zaphod vdr[9740]: Card #1 (Zarlink MT352 DVB-T) STR: 14bf SNR: bdbd BER: 0000019e UNC: 00000000 |L|S|C|V|Z|
|Dec  9 14:33:17 zaphod vdr[9740]: Card #1 (Zarlink MT352 DVB-T) STR: 14bf SNR: b9b9 BER: 0000019e UNC: 00000000 |L|S|C|V|Z|
|Dec  9 14:33:17 zaphod vdr[9740]: Card #1 (Zarlink MT352 DVB-T) STR: 14bf SNR: c1c1 BER: 0000019e UNC: 00000000 |L|S|C|V|Z|

When i run the DVB-T card in a windows computer (with same antenna) i got 
always a perfect picture. Any ideas?

¹
|Dec  9 14:43:13 zaphod kernel: Linux video capture interface: v1.00
|Dec  9 14:43:13 zaphod kernel: saa7146: register extension 'dvb'.
|Dec  9 14:43:13 zaphod kernel: PCI: Found IRQ 5 for device 0000:00:0b.0
|Dec  9 14:43:13 zaphod kernel: saa7146: found saa7146 @ mem d0a2e000 (revision 1, irq 5) (0x110a,0x0000).
|Dec  9 14:43:13 zaphod kernel: DVB: registering new adapter (Fujitsu Siemens DVB-C).
|Dec  9 14:43:13 zaphod kernel: adapter has MAC addr = 00:d0:5c:02:43:11
|Dec  9 14:43:13 zaphod kernel: dvb-ttpci: gpioirq unknown type=0 len=0
|Dec  9 14:43:13 zaphod kernel: dvb-ttpci: info @ card 0: firm f0240009, rtsl b0250018, vid 71010068, app 8000261d
|Dec  9 14:43:13 zaphod kernel: dvb-ttpci: firmware @ card 0 supports CI link layer interface
|Dec  9 14:43:14 zaphod kernel: dvb-ttpci: DVB-C analog module @ card 0 detected, initializing MSP3400
|Dec  9 14:43:14 zaphod kernel: saa7146_vv: saa7146 (0): registered device video0 [v4l2]
|Dec  9 14:43:14 zaphod kernel: saa7146_vv: saa7146 (0): registered device vbi0 [v4l2]
|Dec  9 14:43:14 zaphod kernel: DVB: registering frontend 0 (VLSI VES1820 DVB-C)...
|Dec  9 14:43:14 zaphod kernel: dvb-ttpci: found av7110-0.
|Dec  9 14:43:14 zaphod kernel: PCI: Found IRQ 12 for device 0000:00:08.0
|Dec  9 14:43:14 zaphod kernel: /usr/local/src/dvb-kernel/build-2.6/skystar2.c: FlexCopIIB(rev.195) chip found
|Dec  9 14:43:14 zaphod kernel: /usr/local/src/dvb-kernel/build-2.6/skystar2.c: the chip has 38 hardware filters
|Dec  9 14:43:14 zaphod kernel: DVB: registering new adapter (SkyStar2).
|Dec  9 14:43:15 zaphod kernel: DVB: registering frontend 1 (Zarlink MT352 DVB-T)...

Cc: vdr ml

-- 
Und Tschüss.
Stefan

### Kilroy was here ###  4855  14:20:00 up 9 days