[mythtv-users] Diseqc problem with SG2100 rotor and MythTV

[Gert-Jan de Boer]

Hi,

The rotor turns on its own scale to around 17.
I have pointed the rotor so that 19.2 points to 19.2.

Other programs work perfectly. I thought about moving the rotor but that
just seems plain wrong ;-)

Regards,

Gert-Jan de Boer



Op woensdag 06-06-2007 om 10:21 uur [tijdzone -0400], schreef R. G.
Newbury:
> Gert-Jan de Boer wrote:
> > Hi,
> > 
> > I'm installing an Ubuntu based HTPC setup with the following components:
> > - Skystar2 DVB-S card
> > - Diseqc 1.3 Rotor (Moteck SG2100)
> > - MythTV SVN (rev. 13582)
> > 
> > When I'm tuning MythTV to a satellite position it is always about 2
> > degrees off to the left. When tuning to 19.2E the rotor turns to around
> > 17E. Tuning to 0 results in an position around 2W.
> > 
> > Tuning the rotor manually gives great signal with mplayer.
> > 
> > I use the following program to tune manually:
> > http://www.verbraak.org/wiki/index.php/Goto_X_program
> > 
> > I think there is a problem in tuning the rotor in current MythTV SVN. 
> > Does anyone have an idea how to fix the Diseqc in MythTV? My wife would
> > like to be able to watch TV without using the mplayer command line ;-)
> > 
> 
> I have never dealt with a rotor setup, but this looks like a simple 
> failure of calibration between where the antenna points and where Myth 
> (or the intermediate controller) thinks it is pointing.
> 
> If you physically pointed the antenna 2 degrees west without moving the 
> rotor base the problem would be solved (for myth).
> 
> You don't say whether the mplayer command line adjustment has or does 
> not have this error. If it does not have the error (you call for 19 and 
> get 19) then I would guess that there is a (hidden) and improperly set 
> calibration setting. There is a field in diseqc_tree named 'ordinal' 
> which is an unsigned tinyint(3)...which is just the right size for a 
> 0-360 number. I have no idea what a row in that table actually does, but 
> a review of the table may explain things and may show where you can 
> adjust the setting.
> 
> Just guessing as no-one else stepped in.
> 
> Geoff
>