[linux-dvb] [PATCH] 8PSK/BPSK DVB-S/S2 support

Manu Abraham abraham.manu at gmail.com
Wed Feb 22 14:07:09 CET 2006


Jake wrote:
> Alan Nisota wrote:
>
>   
>> This is a trivial patch which adds capabilities for 8PSK (QPSK_8) and
>> BPSK (QPSK_B) modes to frontend .h
>> ...
>> I am open to other suggestions.
>>
>> As the last of three patches, I'll include one which uses these changes to
>> support 8psk/bpsk on the genpix board, but I'd prefer to get feedback
>> that the implementation I used here s the right strategy
>>  
>>
>>     
> What about DSS modulation support ?
> Twinhan boards already support it and DST frontend setup need just one
> bit changed to switch between QPSK and DSS mode ...
>
>   

The DSS "standard" is proprietary belonging to DIRECTV. Unlike DVB, 
documentation on the standard is not available.
It is not just the single switch that matters. There will need to be API 
changes as well. And to top it up there aren't any userspace 
applications yet. The packet size is also different, 127 rather than 188.


Someone has the specs .. ?


Manu




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