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Re: [Discuss-gnuradio] Basic TX daughterboard
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Basic TX daughterboard |
Date: |
Mon, 26 Jan 2009 15:14:58 -0800 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Fri, Jan 23, 2009 at 07:26:02PM +0100, Ken Smith wrote:
> 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
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