GR_PLOT_PSD_F(1)						   User Commands						  GR_PLOT_PSD_F(1)

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 spec-
       tral 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]

SEE ALSO

       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)

gr_plot_psd_f 3.5						   December 2011						  GR_PLOT_PSD_F(1)