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GR_PLOT_PSD_F(1) User Commands GR_PLOT_PSD_F(1)


gr_plot_psd_f - plot power spectral density using GNU Radio


gr_plot_psd_f: [options] input_filename


Takes a GNU Radio binary file (with specified data type using --data-type) and displays the I&Q data versus time as well as the power spectral density (PSD) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally). The script plots a certain block of data at a time, specified on the command line as -B or --block. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file). By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples. Finally, the size of the FFT to use for the PSD and spectrogram plots can be set independently with --psd-size and --spec-size, respectively. The spectrogram plot does not display by default and is turned on with -S or --enable-spec.


show this help message and exit
Specify the block size [default=8192]
Specify where to start in the file [default=0]
Set the sampler rate of the data [default=1.0]
Set the size of the PSD FFT [default=1024]
Set the size of the spectrogram FFT [default=256]
Turn on plotting the spectrogram [default=False]


gr_plot_char(1) gr_plot_const(1) gr_plot_fft_c(1) gr_plot_fft_f(1) gr_plot_float(1) gr_plot_int(1) gr_plot_iq(1) gr_plot_psd_c(1) gr_plot_psd_f(1) gr_plot_qt(1) gr_plot_short(1)

December 2011 gr_plot_psd_f 3.5