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How to verify response on cyclic-sine is correct?

Question asked by mr_nazrin on Jul 27, 2017
Latest reply on Jul 27, 2017 by larsc

I run Zedboard + FMCOMMS2 with gnuradio for cyclic-sine.grc file. I can observe the output from QT GUI Sink, then I add QT GUI Range to vary frequency source signal so that I can verify the response on Sink. But unfortunately the output didn't reflect on frequency that I changed- No change on output on QT GUI Sink.

For example I expect that if I sweep the frequency, than I can see movement of spectrum to other side, but the example fail to response.Time domain display also not show sine waveform..

 

There something I missing here.. Thank you

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