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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