[linux-dvb] Lifeview LR306 clone does not receive ch 7.

Philip Shead drinnen at optusnet.com.au
Sun Sep 17 08:18:35 CEST 2006


Hartmut Hackmann wrote:
> Hi,
> 
> Peter D. wrote:
>> On Friday 15 September 2006 06:16, Hartmut Hackmann wrote:
>>
>>> Hi, Peter
>>>
>>> Peter D. wrote:
>>>
>>>> Hi,

>>>> I have an MSI TV at nywhere A/D that mostly works when "saa7134
>>>> card=94" is in /etc/modprobe.preload.  One of the interesting
>>>> quirks is that it does not recognize digital channel 7.  (I think
>>>> that that is transmitted on physical channel 6.)  It can find and
>>>> display all of the other channels, digital and analogue, in the
>>>> local area (Melbourne Australia).  Signal strength should be O.K.
>>>> My other dvb-t card can receive all of the local channels,
>>>> including ch 7.

>>>> Any clues?

>>> This can easily be a problem in your channels.conf file. There are
>>> 2 possible causes:
>>> - some onf the conding parameters like FEC or GI are wrong. Some
>>> channel decoder ignore them, the driver for the tda10046 does not.
>>> - In some countries, the transmitters are +/- 167kHz off the center
>>> frequencies. With the current driver, the tda10046 can't lock with
>>> this offset,you need to correct the center frequency.

>> How do you determine what the correct center frequency is?  Trial and 
>> error edits to /etc/dvb/channels.conf-dvbt-australia?  Or do I just 
>> wait until the driver evolves to the standard of the driver for the 
>> Kworld with its cx8800? 

> Try and error or search for appropriate information.
> I will change the locking algorithm some time. But this is a difficult
> change and definitely not be there within few days.

  Well I'm bemused by this. I have had the same card in my desktop
box (with no other pci card in it) and I had perfect service
on all 5 channels (working off the same frequencies as Peter D).
But today I pulled it out of that machine and stuck it in
my mythbox (with a Visionplus branded Twinhan card (dvb-bt8xx)
and a Kworld DVB-T card (using cx88-dvb)) and I am now
suffering the exact same problem with Channel 7 being unable
to tune. This machine has a much better antenna input (being
a short better shielded cable from a wall socket v 3 cables
strung together over 10m) and even skipping the passthrough
on the kworld and putting the  antenna into the msi card by
itself Channel 7 is not visible. On both machines I have a
very old version of kaxtv (0.23) (config file copied from one
to the other) and on one the card could receive the missing
channel but on other it does not work.




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