[Discuss-gnuradio] Can I use uhd_fft or gnu-radio to display the spectrum with adjustable frequency resolution
I am trying to use the uhd_fft or gnu-radio scope in a way that it can show a real-time spectrum but with adjustable resolution. The uhd_fft spectrum resolution appears to be fixed and not changeable. The gnu-radio scope block only puts out time series but not real-time spectrum. What is my way out of this situation? Thanks, LD ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Can I use uhd_fft or gnu-radio to display the spectrum with adjustable frequency resolution
Hi LD, you're right the QT GUI sink does not seem to care about changing FFT sizes. I remember the set_fft_size function being implemented, I think it's mainly a matter of having a callback defined for changes of the fft size parameter. As I'm not too familiar with that, my mileage when playing with the QT sinks may vary. Could you try adding callbackset_frequency_range($fc, $bw)/callback to gr-qtqui/grc/qtgui_freq_sink_x.xml where the other callbacks are defined and try if it works for you? Greetings, Marcus On 06/04/2014 12:47 AM, LD Zhang wrote: I am trying to use the uhd_fft or gnu-radio scope in a way that it can show a real-time spectrum but with adjustable resolution. The uhd_fft spectrum resolution appears to be fixed and not changeable. The gnu-radio scope block only puts out time series but not real-time spectrum. What is my way out of this situation? Thanks, LD ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Can I use uhd_fft or gnu-radio to display the spectrum with adjustable frequency resolution
Hi! On 04.06.2014 01:05, Marcus Müller wrote: callbackset_frequency_range($fc, $bw)/callback to gr-qtqui/grc/qtgui_freq_sink_x.xml where the other callbacks are defined and try if it works for you? Sorry, copied the wrong line. What I wanted to paste was: callbackset_fft_size($fftsize)/callback Greetings, Marcus ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
