On Mon, Jul 07, 2008 at 05:27:40PM -0700, Eric Blossom wrote: > On Tue, Jul 08, 2008 at 10:16:53AM +1000, Phaysal Khan wrote: > > > > Hi List, > > Just re-stating the issues I am having with capturing IF samples of an RF > > signal: I am trying to sample a 16MHz wide spectral content from a signal, > > originally centered at 2.414 GHz. I am using RFX2400, gnuradio 3.1.2 and > > using following command: > > > > python usrp_rx_cfile.py -f 2404.5M -s --no-hb -8 -N 40000 data1.dat
I note that you're not specifying -d 4 to set the decimation rate. > > using "-f 2404.5M" to get IF (downconverted) signal centered at 10MHz. > > using "-s --no-hb -8" to be able to capture 16MHz wide bandwidth. > > I am having following issues: > > 1. I am getting a downconverted signal centered at zero freq and not at > > 10MHz which I expected. > > 2. I can see downconverted signal's spectrum to be only +/-4MHz wide, and > > not +/-8MHz. > > > In the trunk (sorry, I didn't take time to build 3.1.2), when I do > this, I see 16MHz of spectrum: > > [EMAIL PROTECTED] ~]$ usrp_fft.py -8 -f 92.1 -d 4 > > How do you _know_ you're not getting +/- 8MHz? > > > How wide is the signal that you want offset by 10MHz? > > Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
