[linux-dvb] twinhan 1025 - problems locking onto signal

Simon Kenyon simon at koala.ie
Mon Aug 13 16:53:06 CEST 2007

Manu Abraham wrote:
> On 8/13/07, Simon Kenyon <simon at koala.ie> wrote:
>> Simon Kenyon wrote:
>>> just bought 3 cards for my mythtv master backend. silly me.
>>> anyway, using szap i find that tuning to a particular channel is at best
>>> a hit and miss affair.
>>> i have a 4x16 multiswitch which feeds astra28.2E into these three cards
>>> and 4 satellite receivers.
>>> they all get decent signal. i previously had a nexus-s and a technotrend
>>> 1500ci in the box and they had no problems with the signal.
>>> is there anything i can do - other than binning them?
>>> i'm using the hg tree of v4l-dvb.
>>> is there an expermental tree out there with some improvements for this card?
>> a data point is that it will not lock onto any signals with a vertical
>> polarization
>> but will lock on to signals with a horizontal polarization (at the
>> second attempt - not the first).
>> the latter sounds like a timing issue.
> Some of the 1025 cards have been very nasty. It resembles an older
> case where one card would not tune to either vertical (or was it
> Horizontal) completely stuck at one volytage level.
> To take a bite at it, load the dst module with verbose=5, module
> parameter. look at the logs, if you have timing errors you will see
> them in the log.
>> i have 5 other receivers and 2 dvb-s cards which have no problems with
>> the signal coming from the multiswitch to which they are all attached.
>> any help or even ideas of what to do to diagnose the problem out there?
> just post the logs, will take in a look whether anything's possible.
here is a log from the machine.
i performed 3 szaps
the first is to a station which did not lock (V)
the second two did (H)

i hope this is enough to diagnose the problem.

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