On Mon, Jul 25, 2005 Guy Roussin wrote: > For an itinerant platform we are trying to develop a simple system for > automatic positioning of a satellite dish antenna equipped with motors and > a linux PC with > dvb-s card, digital compass, inclinometer and GPS. > > The dvb-s card (budget ?) will have to enable us to automatically recognize > the satellite, it will have also to provide us a maximum of information on > the quality of the signal, polarization and all that could facilitate the > automatic positioning. > > Can you advise us on a dvb-s card which has adequate qualities and which > would > be well recognized under linux? I hope you found the Wiki on linuxtv.org, it has plenty of information in supported cards. This sounds like a fun project, but I think there's a problem: Digital demodulators will only give you useful signal status information when they are already locked to a signal. You can then optimize the dish pointing by using the signal indicators provided by the demodulator. But the dish angle where the signal is strong enough is rather narrow, which makes it difficult to use this for seeking the satellte. I think that using analog equipment is better for this job. HTH, Johannes
