Hi list, I'm using a N210 + SBX daughterboard (vert 2450 antenna). Currently I'm using the "uhd_fft" to check the spectrum at all wifi channels. Strange is that a peak with almost 0dB appears in every frequency I try.
Also, I changed the code from usrp_spectrum_sensing to output the sum of the mag_square of the FFT and the output is always like: ### freq = 2900000000.000000, energy = 16689.216661 freq = 2900000000.000000, energy = 12815.735905 freq = 2900000000.000000, energy = 1570.022886 freq = 2900000000.000000, energy = 192.350267 freq = 2900000000.000000, energy = 23.569094 freq = 2900000000.000000, energy = 2.889016 freq = 2900000000.000000, energy = 0.354752 freq = 2900000000.000000, energy = 0.043869 freq = 2900000000.000000, energy = 0.005605 freq = 2900000000.000000, energy = 0.000880 freq = 2900000000.000000, energy = 0.000269 freq = 2900000000.000000, energy = 0.000216 freq = 2900000000.000000, energy = 16675.043848 freq = 2900000000.000000, energy = 16666.115685 freq = 2900000000.000000, energy = 2280.756275 freq = 2900000000.000000, energy = 279.419596 freq = 2900000000.000000, energy = 34.236761 freq = 2900000000.000000, energy = 4.196034 freq = 2900000000.000000, energy = 0.514922 freq = 2900000000.000000, energy = 0.063638 freq = 2900000000.000000, energy = 0.008021 freq = 2900000000.000000, energy = 0.001167 freq = 2900000000.000000, energy = 0.000309 freq = 2900000000.000000, energy = 0.000235 freq = 2900000000.000000, energy = 20142.803262 freq = 2900000000.000000, energy = 16666.054669 freq = 2900000000.000000, energy = 3313.974010 freq = 2900000000.000000, energy = 406.000443 freq = 2900000000.000000, energy = 49.743476 freq = 2900000000.000000, energy = 6.096459 freq = 2900000000.000000, energy = 0.747946 freq = 2900000000.000000, energy = 0.092179 freq = 2900000000.000000, energy = 0.011596 freq = 2900000000.000000, energy = 0.001642 freq = 2900000000.000000, energy = 0.000362 freq = 2900000000.000000, energy = 0.000226 #### A high value decreses until near zero and then a high value appears again. Any suggestion of what I'm doing wrong ? -- View this message in context: http://gnuradio.4.n7.nabble.com/N210-SBX-High-peaks-at-center-frequency-tp39489.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
