[linux-dvb] [PATCH] Multi protocol support (stage #1)

Manu Abraham abraham.manu at gmail.com
Mon Jun 12 12:40:34 CEST 2006


Johannes Stezenbach wrote:
> My understanding is that dish network and thus the genpix
> card have nothing to do with DVB-S2, but are just a
> proprietary extension which adds 8PSK modulation to DVB-S.
>
>   

Yes, you are right i think.

As i heard most Dish network people have this device. All it depends is 
on 8PSK modulation, looking at the the Broadcom specs 
(http://www.broadcom.com/collateral/pb/4500-PB06-R.pdf) It doesn't say 
anywhere that it is a DVB-S2 supported device, in fact, but just says 
that it supports DVB/DIRECTV/Digicipher II and that it supports 
BPSK/QPSK/8PSK/16QAM modulations. The many parts of the DVB-S2 
demodulator seem to be missing out in that Block Diagram, for example 
the PL descrambling etc which DVB-S2 makes use of.

That was a conclusion that i came about, but as it is just a product 
brief, there is a possibility that i could be wrong as well.


Manu




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