[linux-dvb] Re : Re : No lock possible at some DVB-S2 channels with TT S2-3200/linux

manu eallaud at yahoo.fr
Wed May 14 00:01:49 CEST 2008


On 05/13/2008 05:26:45 PM, Ales Jurik wrote:
> On Tuesday 13 of May 2008, manu wrote:
> > On 05/12/2008 02:42:43 PM, Ales Jurik wrote:
> > > Hi,
> > >
> > > after Telenor switched from Thor-2 to Thor-5 (0.8W) no lock is
> > > possible with
> > > multiproto(-plus) and TT S2-3200 at these transponders:
> > >
> > > TV4
> > > 
> HD;Telenor:11341:vC34M5O35S1:S0.8W:25000:512:0;641=sve:0:B00:1405:70:42:0
> > > CANAL+ FILM
> > > 
> HD;Telenor:11421:hC34M5O35S1:S0.8W:25000:513:644=eng;645=eng:0:B00:3306:7
> > >0:14:0 Nat Geo
> > > 
> HD;Telenor:11434:vC34M5O35S1:S0.8W:25000:512:640=eng:0:B00:3806:70:38:0
> > >
> > > I'm 100% sure that this problem corresponds with switch from
> Thor-2
> > > to
> > > Thor-5
> > > as it appeared exactly at times when switch was announced by
> Telenor.
> > >
> > > Regarding to official document
> > > http://www.telenorsbc.com/upload/PDFS/DVB-S2%20Transponder%20FEC%
> > > 20Change_280208.pdf
> > >
> > > two changes were implemented - FEC from 2/3 to 3/4 and switch off
> > > Pilot.
> > >
> > > On the same HW under Windows it is running ok.
> > >
> > > If somebody could point me to any direction I'll glad to 
> cooperate
> in
> > > debugging.
> >
> > Perhaps you can try to increase the freq by 4Mhz, that's what I did
> > here (DVB-S though) and I have a perfect picture since then.
> > HTH
> > Bye
> > Manu
> >
> Hi,
> 
> thanks for your hint, but I've already tried it. Without result, but
> this time 
> I've let it without action for long time at same channel - after 1 or
> 2 
> minutes I've got sometimes SYNC, after 8 - 10 minutes LOCK, but
> unfortunately 
> only as spikes - once and the driver was falling back to NOSIGNAL, so
> I'm 
> still not able to receive any program.
> 
> Last week I've tried to play a little with the driver (changing gain, 
> SearchRange and some other parameters) but without any reasonable
> result.
> 
> As i don't have documentation (datasheets) from used chips I'm not
> able to 
> test it more. Could you be so kind and send me info where is possible
> to got 
> it? Of course if it is not under NDA.
> 
> Thanks,
> 

I can't help you more than that, let's hope that someone more 
knowledgeable than me can provide you with more infos.
bye
Manu




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