Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in USRP B200

2017-01-18 Thread Soumaya el barrak
, it scans almost 2 > Mhz and drop 3.6 Mhz. I don’t understand what is the reason behind those > results and how can I improve them. > > > Please if you have any ideas, give me a hand! > > > Best Regards > > Soumaya > > 2017-01-16 14:24 GMT+01:00 Soumaya el bar

Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in USRP B200

2017-01-18 Thread Marc Pàmies Massip
Best Regards Soumaya   2017-01-16 14:24 GMT+01:00 Soumaya el barrak mailto:elbarrak.soum...@gmail.com]>: -- Forwarded message -- From: Soumaya el barrak mailto:elbarrak.soum...@gmail.com]> Date: 2017-01-16 12:48 GMT+01:00 Subject: Re: [Discuss-gnuradio] usrp_spect

Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in USRP B200

2017-01-17 Thread Soumaya el barrak
me a hand! Best Regards Soumaya 2017-01-16 14:24 GMT+01:00 Soumaya el barrak : > > -- Forwarded message -- > From: Soumaya el barrak > Date: 2017-01-16 12:48 GMT+01:00 > Subject: Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in > USRP B200 &

Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in USRP B200

2017-01-16 Thread Marcus Müller
Hi Soumaya, could you please keep the mailing list in the loop? Well, on USB2, the maximum sampling rate is, if I remember correctly, somewhere between 8 MS/s and 10 MS/s. Maybe the raspberry Pi isn't the optimal platform for broadband signal observation... $((2**16)) gets evaluated by your shel

Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in USRP B200

2017-01-16 Thread Marcus Müller
Hi Soumaya, while tuning, there will simply be transients, mostly of oscillator energy leaking into the receiver. You cannot use the data that you get while tuning. You might want to define "strange power values"; 2.4 GHz is an ISM band, so a lot of traffic is to be expected there, and that traff

Re: [Discuss-gnuradio] usrp_spectrum_sense.py input parameters in USRP B200

2017-01-13 Thread Marcus Müller
Hi Soumaya, the B200 tunes slower and might need up to half a second when tuning further. You should hence minimize the amount of tuning, and instead of 4MS/s use a higher rate, a larger FFT size, and tune less often. The power normalization is truly, 100%, arbitrary. Since these dB are all "rel