Tony Grant a écrit : > Le dimanche 24 juin 2007 à 21:04 +0200, Moore a écrit : > > >> I am in Montesquieu-Lauragais about 28 km SE of Toulouse. >> I have a 1 m dish on a polar mount. >> When pointing at 28.2° E the polar mount twists the whole dish by about >> 20° clockwise (looking at the dish from in front). >> I get perfect reception. >> >> HTH. >> >> Where do you live ? >> > > Eauze, Gers. Thanks > > I can see the problem I will have to mount the dish on my motor mount > which has the right correction. But I don't think the wall of the > terrasse will take the weight... > > My dish is 80cm but I have read that someone in Pau has perfect > reception with a 60cm > I am also pretty sure that 80 cm should be adequate. However I think you may have problems on Astra 2D channels with a 60 cm, particularly in bad weather conditions. Unfortunately IMO everything worth watching is on 2D :-( I don't think you necessarily need to twist the whole dish as a polar mount does. Twisting the LNB by a similar amount should avoid cross-polarization problems. (However I do seem to remember seeing some of the tiny fixed elliptical dishes in London mounted on the skew.) IMHO it is better to look for a minimum on the wrong polarization rather than a maximum on the correct polarization. This is probably difficult to do on digital : dish alignment was easier in the good old analogue days :-( Nevertheless I am surprised you are having problems with the polarization as in practice I have never found it too critical. Cheers, Chris _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
