Il 15/03/2012 18:41, Mauro Carvalho Chehab ha scritto: > > Hi Gianluca, > > With regards to LNA, the better is to add a DVBv5 property for it. > > The LNA is generally located at the antenna, and not at the device. > > As you know, more than one device may be connected to the same antenna, > and it is generally not a good idea to have two devices sending power to > the LNA. > > So, it is better to have a way to turn it on via the usespace API. > > Also, as this consumes power, the better is to do it only when the device > is actually used. > > Regards, > Mauro Hi Mauro, I believe this "LNA" is just an internal amplifier that is embedded in the cxd2820r demodulator itself. I have a "condo" antenna so there is no way I can control the power from my apartment as everything is centralized. Many DTT receivers have a "5v power" option to drive the antenna amplifiers on the roof. But almost every antenna (at least here in Italy) has a dedicated power supply, in order to make things simpler for the user. Anyway, a DVBv5 property to control this "power switch" is a good idea. Regards, Gianluca -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
