GR_PLOT_FFT(1) User Commands GR_PLOT_FFT(1)
NAME
gr_plot_fft - Frequency domain GNU Radio plotting
SYNOPSIS
gr_plot_fft: [options] input_filename
DESCRIPTION
Takes a GNU Radio complex binary file and displays the I&Q data versus time as well as the frequency domain (FFT) 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.
This value defaults to 1000. 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.
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=1000]
-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]
SEE ALSO
gr_plot_fft_c(1) gr_plot_fft_f(1)
gr_plot_fft 3.5 December 2011 GR_PLOT_FFT(1)
