Thanks for the guidance. Can I do this message passing in GRC? Also, how would the bandwidths get concatenated together and displayed in the same FFT graph? On Jun 11, 2015 7:08 PM, "Tom Rondeau" <t...@trondeau.com> wrote:
> On Thu, Jun 11, 2015 at 9:59 AM, Hassaan Ahmad <hassaan...@gmail.com> > wrote: > >> Hi, >> >> I'm using USRP E310 and running uhd_fft.grc to acquire FFT spectrum from >> the device in network mode, and then displays that with QT FFT GUI block. >> >> Setting a center frequency, I can get an instantaneous bandwidth of 32MHz >> around the center frequency. (for me it's the maximum in network mode) Now, >> I want to change the center frequency programmatically in order to sweep a >> larger bandwidth and then concatenate the results into a single QT FFT >> graph like this: >> >> -IQ/2-----Cent.freq1-----+IQ/2 -IQ/2-----Cent.freq2------+IQ/2 >> -IQ/2-----Cent.freq2------+IQ/2 ... >> >> Is their a way I can do it? >> >> >> >> Regards, >> > > > The QTGUI FFT sink has a message port that allows you to control the > center frequency. See the Detailed Description here > http://gnuradio.org/doc/doxygen/classgr_1_1qtgui_1_1freq__sink__c.html > > Tom > >
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