Hi,
1) Are you feeding RF2400 directly from signal generator or by Antenna ?. Remember that the ISM 2.4GHz band is occupied by wireless devices. 2) Is your RFX2400 works normally with usrp_fft.py ? Can you see clearly the signals you generate in it at the specified frequencies ?. Try to Adjust the RF gain in usrp_fft to get best signal view. Use this gain value in your experiments. 3) Tune delay is very important. When you command the usrp RF daughterboard to change its frequency, then there is many delays along the digitization path (RF synthesizer tuning time, FPGA FIFO filling time, USB transferring time...etc). Using enough tune delay time, you will be sure that the samples entering your FFT block are belong to the requested center frequency. 4) To clearly see the spectrum, you must use the math log function (as implemented in usrp_fft.py). Regards, Firas -- View this message in context: http://www.nabble.com/fft-realated-problems-tp20308034p20324923.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
