If you mean usrp_spectrum_sense.py and usrp_fft.py, then, usrp_spectrum_sense.py in Gnuradio/gnuradio-examples/python/usrp, usrp_fft.py in Gnuradio/gr-utils/src/python/, if your install gnuradio is Gnuradio.
Thanks, Kyungtae From: Marcus D. Leech [mailto:mle...@ripnet.com] Sent: Monday, January 18, 2010 2:11 PM To: Kyungtae Kim Cc: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] measuring noise power On 01/18/2010 01:22 PM, Kyungtae Kim wrote: Thanks, I tried to find the example, however I couldn't in the gnuradio directories. Could you let me know where I can find the sample code? Thanks, Kyungtae From: discuss-gnuradio-bounces+kyungtae=nec-labs....@gnu.org [mailto:discuss-gnuradio-bounces+kyungtae=nec-labs....@gnu.org] On Behalf Of Marcus D. Leech Sent: Monday, January 18, 2010 1:06 PM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] measuring noise power On 01/18/2010 12:36 PM, Kyungtae Kim wrote: Hi, I am looking for a way to measure noise power through usrp1. I tried to test with usrp_spectrum_sense.py, however I am not sure the power values measured is correct, because it is not same values shown as the graph from usrp_fft.py. I wonder if someone helps me out for this. Thanks, Kyungtae _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio Try building a little app using GRC using gr_complex_to_mag_squared(), then run it through an averager. Or the gr_probe_avg_mag_sqrd_c() Block. Pretty straightforward. Should be quite accurate. gr-radio-astronomy/src/python/usrp_ra_receiver.py computes total power, using a long-term averager.
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
