Provided by: gnuradio_3.7.11-10_amd64

**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-Bor--block. This value defaults to 1000. The start position in the file can be set by specifying-sor--startand 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 (-Ror--sample-rate) to the sample rate used when capturing the samples.

**OPTIONS**

-h,--helpshow this help message and exit-dDATA_TYPE,--data-type=DATA_TYPESpecify the data type (complex64, float32, (u)int32, (u)int16, (u)int8) [default=complex64]-BBLOCK,--block=BLOCKSpecify the block size [default=1000]-sSTART,--start=STARTSpecify where to start in the file [default=0]-RSAMPLE_RATE,--sample-rate=SAMPLE_RATESet the sampler rate of the data [default=1.0]

**SEE** **ALSO**

gr_plot_fft_c(1) gr_plot_fft_f(1)