[linux-dvb] Lifeview PCI TRIO DVB-S problems: can not tune half transponders, low SS and SNR

Vangelis Nonas vnonas at otenet.gr
Fri Nov 16 22:19:28 CET 2007


Hello Hermann,

Thank you very much for you valuable help. Your suggestions helped a lot.

Regards
Vagelis


hermann pitton wrote:
> Hi Vangelis!
>
> Am Donnerstag, den 15.11.2007, 21:00 +0000 schrieb Vangelis Nonas:
>   
>> Hello Hermann,
>>
>> Your suggestion helped a lot indeed. I can now get about 2000 services 
>> on Hotbird using scan from dvb-apps. Moreover the "reception" is better, 
>> SNR is about 90%, SS is around 50% or more and I dont often get high 
>> error rates. I also tested viewing channels and I can now see channels 
>> that didn't exist before. One minor negative side effect is that 
>> channelscan on vdr crashes.
>>
>> However, I still can not tume to 12 transponders on hotbird (out of 94 
>> in total). These are the failing transponders:
>>  >>> tune to: 11334:h:S0.0W:27500: (tuning failed)
>>  >>> tune to: 11373:h:S0.0W:27500: (tuning failed)
>>  >>> tune to: 11432:v:S0.0W:27500: (tuning failed)
>>  >>> tune to: 12264:v:S13.0E:27500: (tuning failed)
>>  >>> tune to: 11954:h:S19.2E:27500: (tuning failed)
>>  >>> tune to: 11597:v:S19.2E:22000: (tuning failed)
>>  >>> tune to: 12480:v:S19.2E:27500: (tuning failed)
>>  >>> tune to: 12500:v:S13.0E:27500: (tuning failed)
>>  >>> tune to: 11533:v:S13.0E:27500: (tuning failed)
>>  >>> tune to: 11996:v:S13.0E:27500: (tuning failed)
>>  >>> tune to: 12722:h:S68.5E:26657: (tuning failed)
>>  >>> tune to: 11344:h:S8.0W:27500: (tuning failed)
>>
>> Although the DVB-S part of the card is now much more usable. I feel 
>> there is still room for improvement of the Linux driver.
>>
>> Any suggestions on how  to improve the "reception" further?
>>
>> I have to mention here that I have a single LNB on my installation, no 
>> disecq, however the patch helped a lot.
>>
>> Thank you
>> Vagelis
>>
>>     
>
> I'm a bloody beginner on DVB-S and have a simple dish just since a few
> days.
>
> The reason for that is, that we have the code from Andrew since long for
> the newer silicon stuff, also saa7134 triple devices, which should
> support DVB-S as well since for over two years, but we don't make much
> progress, since only the Trio seems to be supported and on others not
> even testing happens.
>
> For sure I can see, that whole fleets of such triple stuff are coming in
> from all seas.
>
> For now, I'm only on a device, hard enough to barely hold it in a not
> triple capable PCI slot, and likely not fully initialized for the ISL
> stuff.
>
> I'm looking forward to get something "normal" next and then maybe I can
> contribute to your questions in the future.
>
> For now, try to exchange with people on the same hardware than you and
> hope for hints of the DVB guys.
>
> BTW, that outstanding patch is committed since 7 days to v4l-dvb master.
>
> For what I can see the patchlet from me, attaching the ISL6421 for the
> ISL6405 on the Medion Quad should not do any harm, quite the same for
> the first LNB.
>
> If somebody recognizes any possible risks to the hardware, please say
> so. I don't.
>
> Cheers,
> Hermann
>
>
>  
>
>
>   
>> hermann pitton wrote:
>>     
>>> Hi,
>>>
>>> Am Mittwoch, den 14.11.2007, 21:36 +0000 schrieb Vangelis Nonas:
>>>   
>>>       
>>>> Hello,
>>>>
>>>> I have been trying to use the DVB-S frontend of lifeview pci trio to 
>>>> scan and watch channels from Hotbird. I have the following two problems:
>>>>     
>>>>         
>>> please try again with that patch applied and report again.
>>> http://linuxtv.org/pipermail/linux-dvb/2007-June/018741.html
>>>
>>> I don't get a Medion Quad, not in the original triple bus master PCI
>>> slot, to behave well on supplying voltage and tone on a ISL6405ER, but
>>> with the RF loop through from an external receiver providing the missing
>>> I have more than thousand broadcasts available from Hotbird-13.OE.
>>>
>>> Cheers,
>>> Hermann
>>>
>>>
>>>   
>>>       
>>>> A) When I scan (using the scan utility from the hg tree, or the scan 
>>>> utility of my distribution) almost half of the transponders can not be 
>>>> tuned. I get the error tuning failed and of course almost half of 
>>>> Hotbitd's channels are not found. My transponders file is correct 
>>>> because it comes from my set top box which also runs linux :) or from hg 
>>>> dvb-apps or from other dvb software (e.g. prog dvb). I have also tried 
>>>> scanning with channelscan plugin of vdr with the same results. When I 
>>>> use kaffeine to scan for channels I get an Oops. I am attaching the 
>>>> output of my scan command using the scan util from dvb-apps fresh hg 
>>>> pull. (scan.log.gz)
>>>>
>>>> B) When I use ready made channel lists downloaded from the internet I 
>>>> get low SNR and SS on almost half of the transponders and in some cases 
>>>> high error rate. When I use szap on those transponders I can not get a lock.
>>>>
>>>> My kernel is:
>>>> Linux vagoshome 2.6.22-gentoo-r9 #1 SMP Tue Oct 30 16:02:08 UTC 2007 
>>>> i686 AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ AuthenticAMD GNU/Linux
>>>> with a fresh hg mercurial pull and installation.
>>>>
>>>> I attach also my dmesg as dmesg.log.gz
>>>>
>>>> I also attach my lsmod as lsmod.log.gz
>>>>
>>>> In case you need more info about the Oops I get when I scan from 
>>>> Kaffeine, I can reproduce it and send you the output.
>>>>
>>>> The card works correctly under windows on the same machine, sat cable, dish.
>>>>
>>>> Thank you
>>>> Vagelis
>>>>
>>>>         
>
>
>
> .
>
>   




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