Robert Schlabbach wrote: > From: "DUBOST Brice" <dubost@xxxxxxxxxxxxxxxxxxx> >> In regular cards there is (in general) two orthogonal linear polarizers. >> So you can try with any linear polarization but you'll get -3dB on your >> signal > > AFAIK there are *no* polarizers on the card. The polarizer is contained in > the LNB. So you only need an LNB with circular polarization. If that LNB is > controlled with the same signals as common LNBs with linear polarization > are (where +13V sets vertical polarization and +18V sets horizontal > polarization), you can use the same drivers without changes, and only have > to know what circular polarizations horizontal and vertical correspond to. > Hello You're right, I wrote card but I was meaning LNB And if you use a wrong polarisation basis (wrong LNB) (it's not as in the same basis (linear or ciruclar) but the wrong polarization (horizontal,vertical for linear and right, left for horizontal) ) wou'll divide the signal by two. Regards, -- Brice _______________________________________________ linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
