On Wed, Jan 09, 2008 at 12:48:56PM -0800, Brook Lin wrote: > > Hi All, > > I am using TVRX to receive TV signal. I set decimation 8 to give a 8MHz wide > frequency band which is larger than TV bandwidth 6MHz. Now I just use a > piece of wire as the antenna, however, I think I receive audio spectrum > rather than video spectrum. What kind of antenna I should use for observing > video spectrum? Is this piece of wire fine? I also attach the plot I got for > channel2, which is from 54MHz to 60MHz. Did I get right plot? What I am > thinking is that the bandwidth of video should be larger than the one I got > on the plot. > > Thanks, > Brook > http://www.nabble.com/file/p14721259/tvchannel2.jpeg
It basically looks OK, however, I'd try turning the gain down a bit. It looks like the noise floor is pretty high. The type of antenna you need depends on the frequency you're after. If you're trying to receive VHF TV signals, a VHF TV antenna is what you need -- try some "rabbit ears" from Radio Shack: http://www.radioshack.com/product/index.jsp?productId=2103077 Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
