On Mon, 12 Jan 2004 16:24:47 +0100 Nico <[EMAIL PROTECTED]> wrote: > in frontend.h there's no polariziation parameter for ofdm, yet > the few stations transmitting DVB-T streams always specify > H polarization in their specs. > > Is H the only possible polarization for all DVB-T transmissions? > Here COFDM will be used; is it any different from the OFDM > used in other countries? > Will the current drivers have problems with it?
Hi Nico, I have no detailed info about the DVB-T technical spec, but as far as I know, we (we, as Italian users, but maybe everyone else too) can receive the DVB-T signal through our existing analog TV antenna. So the answer is simple: you have no control of the polarization (without going on the roof and physically turning your antenna). Most of the analog channels are now horizontal here in Italy, and the only vertical ones are in the VHF band (easy recognizable because of the bigger antennas used). I think we could switch between two antennas using DiseqC and maybe motorize them too, if DiseqC is not incompatibile for some reason (well, it has satellite in its name). Would that be useful? Not too much, I think, as we are not doing it with analog TV, where disturbing ghosts and reflections could be improved by using an antenna rotor. -- Roberto Ragusa r.ragusa at libero.it -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
