Forum: GNU Radio Basic TX daughterboard

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657193d281ec594e38400a4459b35ad8?d=identicon&s=25 Ken Smith (kenhokie)
on 2009-01-23 19:26
GnuRadio Community,

Is there an example program I can use with the Basic Tx daughterboad to
send a signal out in the range of ~140->150MHz or even a bit lower at
the FM bands (88MHz->107MHz) ?

Thanks,
Ken

Ken Smith
Software Engineer
Penn State University
745d8202ef5a58c1058d0e5395a78f9c?d=identicon&s=25 Eric Blossom (Guest)
on 2009-01-27 00:41
(Received via mailing list)
On Fri, Jan 23, 2009 at 07:26:02PM +0100, Ken Smith wrote:
> Software Engineer
> Penn State University

Ken,

The DAC samples at 128 MS/s, so there's a "fold" at fs/2 == 64MHz.
You can hit 140 - 150 MHz and/or 88-107MHz with an image.  You'll
mostly likely want to use an analog bandpass filter that selects only
the image you're interested in.

You can try this with:

  $ usrp_siggen.py --const -i 32 -f 140M

Hook the output of the Basic Tx up to a spectrum analyzer to see
what's happening.

Eric
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