TV video spectrum

GNU Radio
1

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

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2

On Wed, Jan 09, 2008 at 12:48:56PM -0800, Brook L. wrote:

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:

RadioShack.com Official Site - America's Technology Store

Eric