Re: FFT size in QT GUI Freq.Sink

You have to set the spectrum width to half in the gui frequency sink block.

> The fftsize should be 32 256 512 1024 2048 4096 .....
> In the example you mentioned, the fftsize is set to 2048.
>
> -- Volker
>> I was learning about the sampling rate by looking into the
>> tutorial provided in the GNURadio wiki
>> URL: https://wiki.gnuradio.org/index.php/Sample_Rate_Tutorial
>> <https://wiki.gnuradio.org/index.php/Sample_Rate_Tutorial>
>>
>> When I was trying to replicate the flowgraph in my 3.8.2.0 version of
>> GNURadio. I got an FFT size error message:
>>
>>      return _qtgui_swig.freq_sink_f_make(fftsize, wintype, fc, bw, name,
>> nconnections, parent)
>> RuntimeError: freq_sink: FFT size must be > 16 and < 16384.
>>
>> Then I tried to increase the FFT size to 17 and then the flowgraph was
>> executed but the flowgraph was not the same as shown in the example.
>>
>> Attaching the flowgraph for the reference
>>
>> My question is whether I have built the flowgraph in the wrong manner or
>> is it with the GNURadio 3.8 issue??
>>
>> Regards
>> Ярослав
>>
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