2010/6/17 lishan_wh <lishan...@126.com>: > Hi, > > I wonder how can I get the dBm value by using usrp_spectrum_sense.py. > > should I do it as follows? > > fft = gr.fft_vcc() > > c2mag = gr.complex_to_mag_squared() (or without squared?) > > log = gr.nlog10_ff() > > stats = gr.bin_statistics_f() > > self.connect(self.u,s2v,fft,c2mag,log,stats) > > in main function, I defined > > m = parse_msg(tb.msgq.delete_head()) > > Is mean(m.data) the dBm value? If it isn't, how can I get the it?
The easiest way is to simply use an RF signal generator with a known output power level, feeding it directly into the USRP. Then, you can measure the value of the signal you are receiving (either manually in your application or by viewing the samples with a graphical tool such as using usrp_fft.py) and calibrate against this. -- John Orlando CEO/System Architect Epiq Solutions www.epiq-solutions.com _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
