GR_PLOT_PSD(1)                   User Commands                  GR_PLOT_PSD(1)

NAME
       gr_plot_psd - GNU Radio power spectrum plotting

SYNOPSIS
       gr_plot_psd: [options] input_filename

DESCRIPTION
       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.

OPTIONS
       -h, --help
              show this help message and exit

       -d DATA_TYPE, --data-type=DATA_TYPE
              Specify the data type (complex64, float32, (u)int32, (u)int16,
              (u)int8) [default=complex64]

       -B BLOCK, --block=BLOCK
              Specify the block size [default=8192]

       -s START, --start=START
              Specify where to start in the file [default=0]

       -R SAMPLE_RATE, --sample-rate=SAMPLE_RATE
              Set the sampler rate of the data [default=1.0]

       --psd-size=PSD_SIZE
              Set the size of the PSD FFT [default=1024]

       --spec-size=SPEC_SIZE
              Set the size of the spectrogram FFT [default=256]

       -S, --enable-spec
              Turn on plotting the spectrogram [default=False]

SEE ALSO
       gr_plot_psd_c(1) gr_plot_psd_f(1)

gr_plot_psd 3.10.11.0             2024-09-15                    GR_PLOT_PSD(1)