Ah, so you're using another USRP to transmit? I can't reproduce this right now (not close to USRPs), but could you send an email with the output of usrp_spectrum_sense attached, and also the full verbatim command line used to launch it?
Best regards, Marcus On 03/02/2016 09:58 PM, Heitor Araujo wrote: > Hi Marcus, > > When the N210 is transmitting, LEDs A,D,E,F are on. When the N210 is > receiving, LEDS C,D,E,F are on. > I run the uhd_fft script and the USRP detected the signal on the right > frequency (The frequency that it was trasmitted - 700.68). > > Command to transmit: uhd_siggen -f 700681250.0 > > ------------------------------------------------------------------------ > To: [email protected] > From: [email protected] > Date: Wed, 2 Mar 2016 21:09:40 +0100 > Subject: Re: [Discuss-gnuradio] [spectrum sense bug][usrp] > > Hi Heitor, > > if the same applies to you just displaying e.g. 10MHz of bandwidth > with uhd_fft, you probably have a hefty oscillator offset, either on > the N210 10MHz reference or your signal generator. What generates > your signal, and which LEDs are active on your N210? > > Best regards, > Marcus > > On 02.03.2016 21:06, Heitor Araujo wrote: > > Hi > > I'm trying to do a basic spectrum sense with a USRP N210 kit and > gnuradio. > > I made a literature research and noted that the > “usrp_spectrum_sense.py” code was used in some articles. But when > transmit some signal in a certain frequecy and execute the > “usrp_spectrum_sense.py”, the signal is found by the code, but it > appears in another frequency (usually about 1Mhz ahead). And also > the bandwidth of the received signal is different from the > transmited signal (It seems it depends of the sample rate of the > transmited the signal). > > sudo ./usrp_spectrum_sense.py 699M 702M --fft 512 and execute the > "uhd_tx_dpsk.grc" in gnuradio to transmit the signal from 700.2M > tom 700.4M. The signal is detected in 700.7M to 701M. > > Thanks > > > > > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] <mailto:[email protected]> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > _______________________________________________ Discuss-gnuradio > mailing list [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
