[linux-dvb] dvb-s2 parameters - rolloff & pilot

Georg Acher acher at in.tum.de
Fri Dec 14 22:14:21 CET 2007


On Fri, Dec 14, 2007 at 08:28:12PM +0100, Andreas Oberritter wrote:
 
> > dvb-s2 rolloff
> > 0=0.20 (DVB-S2)
> > 1=0.25 (DVB-S2)
> > 2=0.35 (DVB-S2/DVB-S)
> 
> You can get the roll-off factor from the satellite delivery system
> descriptor, which is specified in ETSI EN 300 468 V1.8.1 (2007-10). The
> syntax of this descriptor was changed with the introduction of DVB-S2.

At least on the CX24416, I've found no significant differences when changing
the rolloff-value. It may have bigger effects on weak or more adjacent
signals, but I don't think a false setting will have an impact on locking.

-- 
         Georg Acher, acher at in.tum.de         
         http://www.lrr.in.tum.de/~acher
         "Oh no, not again !" The bowl of petunias          



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