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

Per Heldal heldal at eml.cc
Wed Nov 12 11:21:35 CET 2008

On Wed, 2008-11-12 at 09:46 +0300, Goga777 wrote:
> thanks for your patch.
> btw - could you scan dvb-s2 (qpsk & 8psk) channels with scan-s2 and
> hvr4000 ? with which drivers ?

I seem to be able to scan some transponders, but not all, using current
code from the repos at http://linuxtv.org/hg/v4l-dvb/ and

I run scan-s2 on the following list of HD-transponders on 0.8w :

S 11938000 H 25000000 3/4 35 8PSK
S 12015000 H 30000000 3/4 35 8PSK
S 12130000 H 30000000 3/4 35 8PSK
S 12188000 V 25000000 3/4 35 8PSK

(a selection of transponders from

With rolloff set to AUTO scan-s2 will not lock to any transponder.
Instead it will appear to repeatedly re-scan sources on any transponder
the tuner previously was tuned to.

With rolloff set to 35 as above scan-s2 will lock and find channels on
both transponders with SR=25000000, but for the 2 in the middle with
SR=30000000 it simply repeats the channel-list of the previous
transponder. I've been playing with alternatives for rolloff and
modulation with no result.


Per Heldal - http://heldal.eml.cc/

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