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gr_plot_psd_f - Online in the Cloud

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PROGRAM:

NAME


gr_plot_psd_f - plot power spectral density using GNU Radio

SYNOPSIS


gr_plot_psd_f: [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

-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]

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