[mythtvnz] Can't get lock on some channels

[Julius Spencer]

Hi,

Ok so I'm still not any further with this - but I have more information:
So I have a Nova-S-Plus and the cable is running directly from the dish to the card. The dish is correctly aligned. I can get a lock on 12456000 but not on 12483000 in the mythtvsetup. Yesterday morning I could get a lock on 12483000 and it worked for about an hour. Why it stopped working... I don't know.

I'm starting to wonder if there's something wrong with my DVB card. Is anyone else using this card with mythdora? (Maybe I should try a different distro or card...)


I read the following site:
http://www.wlug.org.nz/FreeViewMythTvSetup

which indicated that perhaps I had a cabling issue due to receiving the following:

./dvbtune -f 1733000 -s 22500 -p h -m -tone 0
Using DVB card "Conexant CX24123/CX24109"
tuning DVB-S to L-Band:0, Pol:H Srate=22500000, 22kHz=off
polling....
Getting frontend event
FE_STATUS:
polling....
Getting frontend event
FE_STATUS: FE_HAS_SIGNAL
polling....
Getting frontend event
FE_STATUS: FE_HAS_SIGNAL FE_HAS_CARRIER
polling....
Getting frontend event
FE_STATUS: FE_HAS_SIGNAL
polling....
Getting frontend event
FE_STATUS: FE_HAS_SIGNAL FE_HAS_CARRIER
polling....

and not getting (something like):
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC
Signal=50823, Verror=0, SNR=52983dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=50931, Verror=0, SNR=53001dB, BlockErrors=0, (S|L|C|V|SY|)

So I checked the dish alignment and cabling, but it all seems fine. I find that the signal is at 98% but the S/N is flickering between 4.6, 4.7 and 4.8 dB.


dmesg looks fine to me:

cx88/2: cx2388x MPEG-TS Driver Manager version 0.0.6 loaded
cx2388x alsa driver version 0.0.6 loaded
cx88/0: cx2388x v4l2 driver version 0.0.6 loaded

cx88[0]: subsystem: 0070:9202, board: Hauppauge Nova-S-Plus DVB-S [card=37,autodetected]
cx88[0]: TV tuner type 4, Radio tuner type -1
tveeprom 1-0050: Hauppauge model 92001, rev C1B1, serial# 3298616
tveeprom 1-0050: MAC address is 00-0D-FE-32-55-38
tveeprom 1-0050: tuner model is Conexant_CX24109 (idx 111, type 4)
tveeprom 1-0050: TV standards ATSC/DVB Digital (eeprom 0x80)
tveeprom 1-0050: audio processor is CX883 (idx 32)
tveeprom 1-0050: decoder processor is CX883 (idx 22)
tveeprom 1-0050: has no radio, has IR receiver, has no IR transmitter
cx88[0]: hauppauge eeprom: model=92001
input: cx88 IR (Hauppauge Nova-S-Plus  as /devices/pci0000:00/0000:00:1e.0/0000:02:02.2/input/input6
cx88[0]/2: cx2388x 8802 Driver Manager
cx88-mpeg driver manager 0000:02:02.2: PCI INT A -> GSI 17 (level, low) -> IRQ 17
cx88[0]/2: found at 0000:02:02.2, rev: 5, irq: 17, latency: 64, mmio: 0xfa000000
cx8800 0000:02:02.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
cx88[0]/0: found at 0000:02:02.0, rev: 5, irq: 17, latency: 64, mmio: 0xf8000000
cx88[0]/0: registered device video0 [v4l2]
cx88[0]/0: registered device vbi0
cx88_audio 0000:02:02.1: PCI INT A -> GSI 17 (level, low) -> IRQ 17
cx88[0]/1: CX88x/0: ALSA support for cx2388x boards
cx88/2: cx2388x dvb driver version 0.0.6 loaded
cx88/2: registering cx8802 driver, type: dvb access: shared
cx88[0]/2: subsystem: 0070:9202, board: Hauppauge Nova-S-Plus DVB-S [card=37]
cx88[0]/2: cx2388x based DVB/ATSC card
CX24123: detected CX24123
DVB: registering new adapter (cx88[0])
DVB: registering frontend 0 (Conexant CX24123/CX24109)...


If you have seen this or have a good idea for what to try next I would be most grateful. I might be able to test with a Hauppage HVR-3000 card.

Regards,
Julius.





On 11/07/2010, at 10:05 PM, Steve Hodge wrote:

> On Sun, Jul 11, 2010 at 8:39 PM, Julius Spencer <julius at msa.co.nz> wrote:
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC
> 
> You're getting lock on both multiplexes so it must be something in Myth. Nick's suggestion that the polarity of one of the multiplexes might be wrong makes sense.
> 
> Cheers,
> Steve
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