Re: [Discuss-gnuradio] usrp_spectrum_sense and average dBm power levels

2012-07-06 Thread mleech
On 06 Jul 2012 13:59, Martin Braun (CEL) wrote: > Marcus, you're way too helpful. > One could think you're Canadian :) It's my most serious personality flaw :-) ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mail

Re: [Discuss-gnuradio] usrp_spectrum_sense and average dBm power levels

2012-07-06 Thread Martin Braun (CEL)
On Fri, Jul 06, 2012 at 01:24:12PM -0400, mle...@ripnet.com wrote: > uhd_fft *is not in any way* showing real-world dBm values -- it's merely > showing FFT magnitude values in dB -- but it's dB relative to a > pretty-arbitrary scaling. > > Different sample rates result from different decimation va

Re: [Discuss-gnuradio] usrp_spectrum_sense and average dBm power levels

2012-07-06 Thread mleech
On 06 Jul 2012 13:05, Eric Jaso wrote: > I'm having trouble trying to implement an energy detector in GNU Radio. I want to find empty channels that have a signal power less than or equal to the FCC's -114 dBm detection threshold. I've been modifying the usrp_spectrum_sense.py code that came wi