[mythtv-users] SBS Mebourne DVB Linux 2.6.16 mythtv broken

Ben debian-list at blueturtles.com
Sat Aug 5 20:24:19 UTC 2006


Brian May wrote:
>>>>>> "Ben" == Ben  <debian-list at blueturtles.com> writes:
>>>>>>             
>
>     Ben> Works OK here
>
>     Ben> Myth reports signal strength 94% (North west Melbourne) on
>     Ben> the backside of a hill with Kworld Xpert card.
>
>     Ben> # uname -a Linux myth 2.6.17 #1 PREEMPT Fri Jun 23 13:06:24
>     Ben> EST 2006 i686 GNU/Linux
>
>     Ben> SBS # femon -a 2 using '/dev/dvb/adapter2/frontend0' FE:
>     Ben> Zarlink MT352 DVB-T (TERRESTRIAL) status 1f | signal f2df |
>     Ben> snr bebe | ber 00000000 | unc 00000000 | FE_HAS_LOCK status
>     Ben> 1f | signal f24f | snr bfbf | ber 00000000 | unc 00000000 |
>     Ben> FE_HAS_LOCK
>
> With 2.6.8 (suspect this doesn't matter for tzap):
>
> mythtv:/root$ tzap  "SBS DIGITAL 1"
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> tuning to 536625000 Hz
> video pid 0x00a1, audio pid 0x0051
> status 00 | signal c5c5 | snr f1f1 | ber 0001fffe | unc 00000000 | 
> status 1f | signal c6c6 | snr fdfd | ber 0000b99c | unc 00000000 | FE_HAS_LOCK
> status 1f | signal c6c6 | snr fefe | ber 000003ce | unc 00000000 | FE_HAS_LOCK
>
> which seems kind of crappy compared with our close (and line of sight)
> location to the transmitters (Mount Dandenong).
>
> With ABC it is even worse:
>
> mythtv:/root$ tzap  "ABC TV Melbourne"
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> tuning to 226500000 Hz
> video pid 0x0200, audio pid 0x028a
> status 00 | signal c0c0 | snr efef | ber 0001fffe | unc 00000000 | 
> status 1f | signal c0c0 | snr f7f7 | ber 000030a8 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal c1c1 | snr fefe | ber 00002f60 | unc 00000000 | FE_HAS_LOCK
> status 1f | signal c0c0 | snr fefe | ber 00002dae | unc 00000000 | FE_HAS_LOCK
> status 1f | signal c1c1 | snr 0000 | ber 00002bf6 | unc 00000000 | FE_HAS_LOCK
>
> However, there are no problems with ABC. No sense here.
>
>   
Maybe Myth is giving up on the lock too early.  I think there is a lock
time-out setting for each card in Mythtv-setup, perhaps increasing this
will work?

Cheers
Ben



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