Just found this link:
http://www.bbc.co.uk/reception/info/sat_frequencies.shtml
Confirms that the FEC value should be FEC_5_6 - leaving only the three
inversion options to try.
Also noticed that the symbol rate that page specifies is different to the
one you're using: 22 Msymbol/s, not 27.5 Ksymbol/s - might be worth trying
that too once you're no longer getting error messages about 'invalid
paramters'.
Note the 'service ids' listed on that page are not the same thing as the
PIDs on which the channels are broadcast.
So, revised suggestion:
feparams = {
"symbol_rate" : 22*1000000,
"inversion" : dvb3.frontend.INVERSION_AUTO,
"fec_inner" : dvb3.frontend.FEC_5_6
}
> I'm not hugely familiar with DVB-S so anything I'm about to suggest might
> be wrong(!) ...
>
> If I remember right, DVB-S is QPSK modulation based.
>
> Looking at:
>
> http://code.google.com/p/kamaelia/source/browse/trunk/Code/Python/Bindings/python-dvb3/dvb3/cfrontend.pxd#169
>
> ...I reckon the feparams you need to specify are therefore:
> "frequency"
> "inversion"
> "symbol_rate"
> "fec_inner"
>
> The Tuner will know what kind of device (DVB-S, DVB-C, DVB-T) it is using
> so will treat your feparams accordingly.
>
> 27500 sounds like the symbol rate. I've no idea about the other
> parameters. You can try the 'auto' flags for the other two. If you're
> lucky, your dvb-s card might support that:
> INVERSION_AUTO
> FEC_AUTO
>
> eg:
> feparams = {
> "symbol_rate" : 27500,
> "inversion" : dvb3.frontend.INVERSION_AUTO,
> "fec_inner" : dvb3.frontend.FEC_AUTO
> }
>
>
>
> Matt
>
>> i make a little change but i get another error:
>> from Kamaelia.Device.DVB.Core import DVB_Multiplex
>> from Kamaelia.Chassis.Pipeline import Pipeline
>> from Kamaelia.File.Writing import SimpleFileWriter
>>
>> import dvb3
>>
>>
>> freq = 119.770000
>> feparams = {"symbol_rate" : 27500,
>>
>>
>> }
>>
>> and i get the following error
>>
>> The file frontend.pyx could not be opened.
>>
>> and after i gat :
>> The debugged program raised the exception unhandled IOError
>> "(22, 'Invalid argument')"
>> File: frontend.pyx, Line: 364
>>
>> Can you hel me?
>>
>> Thanks
>>
>> Luca
>>
>> On 19 Nov, 22:07, luca72 <[email protected]> wrote:
>>> Thanks Michael for your help, but at my first test i get problems
>>> usual:
>>> so i explain my test
>>> i have this data i have to log ECM and store it in file:
>>>
>>> Frequency 11977
>>> pid 1296
>>> Horizzontal
>>> 27500
>>>
>>> So i start just to write :
>>>
>>> from Kamaelia.Device.DVB.Core import DVB_Multiplex
>>> from Kamaelia.Chassis.Pipeline import Pipeline
>>> from Kamaelia.File.Writing import SimpleFileWriter
>>>
>>> import dvb3
>>>
>>> freq = 119.77
>>> feparams = {
>>> "constellation" : dvb3.frontend.QPSK,
>>>
>>> }
>>>
>>> Pipeline(
>>> DVB_Multiplex(freq, [0x1296],feparams), # BBC Multiplex 1,
>>> whole transport stream
>>> SimpleFileWriter("prova"),
>>> ).run()
>>>
>>> I get the error :
>>> The debugged program raised the exception unhandled TypeError
>>> "'constellation' is an invalid keyword argument for this function"
>>> File: /usr/local/lib/python2.6/dist-packages/Kamaelia/Device/DVB/
>>> Core.py, Line: 210
>>>
>>> Thanks Luca
>>>
>>> On 19 Nov, 10:20, Michael Sparks <[email protected]> wrote:
>>>
>>> > On Thursday 19 November 2009 07:25:56 luca72 wrote:
>>>
>>> > > Thanks for the linkd page, in the example there are dvb-t example
>>> but
>>> > > i con also use for dvb-s making some change is it correct?
>>>
>>> > You'll be pleased to hear that the dvb bindings were first used with
>>> a
>>> DVB-S
>>> > card. Most current testing has been with DVB-T, but they should still
>>> work
>>> > with DVB-S. (We've made changes to support DVB-C as well when a patch
>>> came
>>> > our way BTW :)
>>>
>>> > Michael
>>> > --http://yeoldeclue.com/bloghttp://twitter.com/kamaelianhttp://www.kama...
>>
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>>
>>
>
>
> --
> | Matt Hammond
> |
> | [anything you like unless it bounces] 'at' matthammond 'dot' org
>
>
>
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--
| Matt Hammond
|
| [anything you like unless it bounces] 'at' matthammond 'dot' org
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