Re: FFT size in QT GUI Freq.Sink

[Volker Schroer]

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