[linux-dvb] [PATCH] scan-s2: fixes and diseqc rotor support

Christophe Thommeret hftom at free.fr
Wed Nov 12 13:59:05 CET 2008


Le mercredi 12 novembre 2008 13:08:44 Alex Betis, vous avez écrit :

> > I can see the logic for 8PSK=>DVB-S2, but as far as I
> > can see, QPSK does not imply purely DVB-S...
> > NIT result:  12324000 V 29500000   pos  28.2E    FEC 3/4  DVB-S2 QPSK
> > one of eight such transponders, based on parsing the NIT
> > tables.  Also, a note from my inital 19E2 scan file to
> > remind me why it failed:
> > S 11914500      h       27500   ##      DVB-S2 QPSK (0x05)
> > May be no longer up-to-date.
>
> Google search shows that you're right about it, thanks for pointing on
> that. I'll leave only 8PSK => DVB-S2 binding. People who want to insist on
> DVB-S only scanning will have to specify S1 in their frequency file.
> I'll probably add also a switch to block S2 scanning at all for those who
> don't have S2 compatable card.
>
> BTW, you give here example of NIT parsing, do you know the format of the
> message and what field specifies that the delivery system is DVB-S2? scan
> utility code doesn't parse it, so I just add both DVB-S and DVB-S2 scans
> for newly added transponder from NITmessage.

It's specified in Satellite Descriptor:
modulation_system==1, =>S2
modulation_system==0, =>S

-- 
Christophe Thommeret

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