Re: Re : [linux-dvb] Most stable DVB-S2 PCI Card?

From: David Lister <foceni@gmail.com>
To: Manu <eallaud@gmail.com>
Cc: linux-media@vger.kernel.org
Subject: Re: Re : [linux-dvb] Most stable DVB-S2 PCI Card?
Date: Mon, 25 May 2009 07:32:56 +0200	[thread overview]
Message-ID: <4A1A2D88.7070601@gmail.com> (raw)
In-Reply-To: <1243218968.13752.0@manu-laptop>

Manu wrote:
> Le 23/05/2009 01:51:15, David Lister a écrit :
>   
>> Manu Abraham wrote:
>>     
>>> On Sat, May 23, 2009 at 1:30 AM, David Lister <foceni@gmail.com>
>>>       
>> wrote:
>>     
>>>   
>>>       
>>>> Actually, there are many DVB-S2 cards supporting 45 MS/s, even
>>>>         
>> TeVii S460
>>     
>>>> can do 2-45 MS/s. I spoke with a fellow TeVii owner, who confirmed
>>>>         
>> the card
>>     
>>>> is working with a 45 MS/s transponder on Express AM2 without *any*
>>>>         
>> issues.
>>     
>>>> All this aside, there aren't any transponders with higher rates
>>>>         
>> than this
>>     
>>>> and there won't be for many years. Who knows how stable would TT
>>>>         
>> even be
>>     
>>>> with such rates? For now, it's irrelevant anyway. I have no 
>>>>         
>> problem
>>     
>>>> upgrading to a new card in 3-4 years, providing there will be a
>>>>         
>> stable,
>>     
>>>> fully supported card for Linux with as many satisfied owners as
>>>>         
>> e.g. Nova S2
>>     
>>>> HD has.
>>>>     
>>>>         
>>> You are talking about a 45 MSPS DVB-S stream on a DVB-S2
>>>       
>> demodulator,
>>     
>>> while i was talking about a 45 MSPS DVB-S2 stream on a DVB-S2
>>>       
>> demodulator.
>>     
>>> Big difference !
>>>   
>>>       
>> This point is moot in the first place, mate. Especially in USA
>> (original
>> poster), where it'll take twice the time to reach those rates on
>> DVB-S2.
>> All current 45 MS/s transponders are QPSK, at least as far as I can
>> tell. Even if that "technology preview" 8PSK transponder of yours
>> existed (somewhere above Asia), it's hardly a reason to buy
>> Linux-unstable cards in EU or USA. Especially considering OP's quest
>>     
>
> Just a quick note: Manu is right at least here in the French Caribbean 
> Islands where, under the pretext of streaming more HD channels, 
> CanalSat Caraibes (which is strongly affiliated with Canal+ France) is 
> broadcasting DVB-S2 QPSK 45 MSPS. People are really upset about it 
> because it basically boils down to lock everybody into renting their 
> decoder.
> So yes, some people (read me ;-) desperately needs DVB-S2 HW supporting 
> high SPS rates (plus I need CI also). For now I dont see this rare 
> bird! If someone knows one with good linux driver...
>   
Yes, that would be the Intelsat 903 we talked about. Btw, you sure it's
QPSK? If so, it's not S2, but S. :) Never mind that anyway, dear, our
discussion wasn't about existence or non-existence of high rate 8PSK
signals. In the beginning of the thread we established that there are
places on Earth with these signals (your bird seems the only one, but
there may be more!). The question was their relevance for typical US /
EU citizens *now*. There's no doubt in my mind that higher rates will
become used eventually, perhaps sooner that we think even if it may seem
unlikely - a year, two? Even during this "short time", I'll be using
standard HW which has been good enough for everybody for years and when
the time comes, there will be new HW to choose from - perhaps even
better than TT-1600. :) This is my point, the rest are just reactions to
Manu.

Btw, *Manu*, I just read your on-line resume. You're in Bangalore,
right? Funny thing, I'm in India too - for half a year already, but I'll
be leaving soon. It's business crap as usual, but India for the first
time. I kinda like it here. Destinations without proper engineers call
upon us, the European *Jedi* of the HA/HP computing, to build & install
IBM supercomputers for them and design new infrastructures. :o) If you
want to come and smash my face with a hammer, feel free to visit me in
Koregaon Park. :o)

-- 
Dave