[linux-dvb] Tuning problems

stev391 at email.com stev391 at email.com
Sun Jun 29 12:28:14 CEST 2008


Try updating to the latest scan file from the dvb-apps mercurial.  

Channel 7 have changed their parameters in the last year and some tuners automatically try other combinations then instructed, that is why it is working with one and not the other.

The new Channel 7 parameters are:
# Seven
T 177500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE

As for the SBS problem it might be just poor reception or the tuner wasn't designed for the Australian frequencies correctly.


<Original  Message>
Dear Linux-DVBers,

I now own two USB DVB-T receivers (dongles): a Gigabyte U7000-RH and a
digitalNow tinyUSB2.

I use them on my Kubuntu 7.10 workstation.

I've had the digitalNow for a year or so and it has been working fine
(and easy to get going) with kaffeine except that I couldn't receive SBS
reliably (in Adelaide, Australia) although I was able to tune to it from
time to time. With the Tour de France starting next week (coverage
broadcast by SBS), I took a punt yesterday and bought a Gigabyte
U7000-RH and, yes, it too was easy to get going, and, luckily, receives
SBS nicely -but it can't tune to Channel 7 at all!

My kaffeine installation now has a channel list that covers all the
local terrestrial TV stations. If I connect the digitalNow device, I can
watch 2, 9, 7 & 10 and if I connect the Gigabyte device I can watch SBS,
2, 9 and 10.

I'm presuming that means that by channel tuning data is OK. I don't know
whether it's relevant, but I notice that SBS seems to be the highest
frequency local station and Channel Seven seems to be the lowest. There
seems to be a problem with both devices at the opposite ends of the
frequency range.

Any suggestions? (other the juggling the two devices!)



     # Australia / Adelaide / Mt Lofty
     # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
     # ABC
     T 226500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
     # Seven
     T 177500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE
     # Nine
     T 191625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
     # Ten
     T 219500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE
     # SBS
     T 564500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE

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