Dear Firas, Thanks for your reply, First of all I am using antenna (RX2), and yes I know 2.4 band is messed up with many wireless tech. but I am continuesly monitoring it with spectrum analyzer during my experiments to make sure that some other system is not working in the area.
I have tried with many TX and RF gains. I am also using log function, and I have already checked with larger tune_delays but all in vain???????? Any suggestions?? Best Regards Kaleem Ahmad Firas A. wrote: > > 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-tp20308034p20325086.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
