On Wed, Dec 05, 2007 at 03:54:50PM -0800, Brook Lin wrote: > > Hi All, > > I am new to Gnuradio. I did some test and simple implementation. Now, I have > a question about combining usrp_fft.py and usrp_spectrum_sense.py. > > I know that usrp_fft.py gives a spectrum at certain center frequency I > specified, and shows the result in a GUI window. By changing the decimation, > I can get the spectrum at interested frequency within different bandwidth. > Say, if decimation is 16, the bandwidth shown in GUI is 4M, if option -8 is > applied and decimation is 4, a 16M bandwidth can be got. So that means that > I can do the spectrum analysis and observe it in GUI window just within 16M. > > Later on, I found that usrp_spectrum_sense.py can be used to analysis > spectrum within any frequency range, I just need to specify the lower bound > and upper bound of the frequencies. And I can save the output to a file and > plot it using Matlab. However, I want to observe the spectrum in a GUI > window, like usrp_fft does, rather than the output file. > > Is that possible that by modifying usrp_fft.py and combining it with > usrp_spectrum_sense.py, the spectrum within a wider range of frequencies can > be observed in a GUI window?
Yes. Note however that at this moment there is a known problem with usrp_spectrum_sense.py (actually believed to be in gr_feval_dd) that causes a segmentation fault. See ticket:199 http://gnuradio.org/trac/ticket/199 Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
