Skip to main content

Obtain power spectrum from SoapySDR devices (RTL-SDR, Airspy, SDRplay, HackRF, bladeRF, USRP, LimeSDR, etc.)

Project description

Obtain power spectrum from SoapySDR devices (RTL-SDR, Airspy, SDRplay, HackRF, bladeRF, USRP, LimeSDR, etc.)


You should always install SciPy or pyFFTW, because numpy.fft has horrible memory usage and is also much slower.


usage: soapy_power [-h] [-f Hz|Hz:Hz] [-O FILE | --output-fd NUM] [-F {rtl_power,rtl_power_fftw,soapy_power_bin}] [-q]
                   [--debug] [--detect] [--info] [--version] [-b BINS | -B Hz] [-n REPEATS | -t SECONDS | -T SECONDS]
                   [-c | -u RUNS | -e SECONDS] [-d DEVICE] [-C CHANNEL] [-A ANTENNA] [-r Hz] [-w Hz] [-p PPM]
                   [-g dB | -G STRING | -a] [--lnb-lo Hz] [--device-settings STRING] [--force-rate] [--force-bandwidth]
                   [--tune-delay SECONDS] [--reset-stream] [-o PERCENT | -k PERCENT] [-s BUFFER_SIZE] [-S MAX_BUFFER_SIZE]
                   [--even | --pow2] [--max-threads NUM] [--max-queue-size NUM] [--no-pyfftw] [-l] [-R]
                   [-D {none,constant}] [--fft-window {boxcar,hann,hamming,blackman,bartlett,kaiser,tukey}]
                   [--fft-window-param FLOAT] [--fft-overlap PERCENT]

Obtain a power spectrum from SoapySDR devices

Main options:
  -h, --help            show this help message and exit
  -f Hz|Hz:Hz, --freq Hz|Hz:Hz
                        center frequency or frequency range to scan, number can be followed by a k, M or G multiplier
                        (default: 1420405752)
  -O FILE, --output FILE
                        output to file (incompatible with --output-fd, default is stdout)
  --output-fd NUM       output to existing file descriptor (incompatible with -O)
  -F {rtl_power,rtl_power_fftw,soapy_power_bin}, --format {rtl_power,rtl_power_fftw,soapy_power_bin}
                        output format (default: rtl_power)
  -q, --quiet           limit verbosity
  --debug               detailed debugging messages
  --detect              detect connected SoapySDR devices and exit
  --info                show info about selected SoapySDR device and exit
  --version             show program's version number and exit

FFT bins:
  -b BINS, --bins BINS  number of FFT bins (incompatible with -B, default: 512)
  -B Hz, --bin-size Hz  bin size in Hz (incompatible with -b)

  -n REPEATS, --repeats REPEATS
                        number of spectra to average (incompatible with -t and -T, default: 1600)
  -t SECONDS, --time SECONDS
                        integration time (incompatible with -T and -n)
  -T SECONDS, --total-time SECONDS
                        total integration time of all hops (incompatible with -t and -n)

  -c, --continue        repeat the measurement endlessly (incompatible with -u and -e)
  -u RUNS, --runs RUNS  number of measurements (incompatible with -c and -e, default: 1)
  -e SECONDS, --elapsed SECONDS
                        scan session duration (time limit in seconds, incompatible with -c and -u)

Device settings:
  -d DEVICE, --device DEVICE
                        SoapySDR device to use
  -C CHANNEL, --channel CHANNEL
                        SoapySDR RX channel (default: 0)
  -A ANTENNA, --antenna ANTENNA
                        SoapySDR selected antenna
  -r Hz, --rate Hz      sample rate (default: 2000000.0)
  -w Hz, --bandwidth Hz
                        filter bandwidth (default: 0)
  -p PPM, --ppm PPM     frequency correction in ppm
  -g dB, --gain dB      total gain (incompatible with -G and -a, default: 37.2)
  -G STRING, --specific-gains STRING
                        specific gains of individual amplification elements (incompatible with -g and -a, example:
  -a, --agc             enable Automatic Gain Control (incompatible with -g and -G)
  --lnb-lo Hz           LNB LO frequency, negative for upconverters (default: 0)
  --device-settings STRING
                        SoapySDR device settings (example: biastee=true)
  --force-rate          ignore list of sample rates provided by device and allow any value
  --force-bandwidth     ignore list of filter bandwidths provided by device and allow any value
  --tune-delay SECONDS  time to delay measurement after changing frequency (to avoid artifacts)
  --reset-stream        reset streaming after changing frequency (to avoid artifacts)

  -o PERCENT, --overlap PERCENT
                        percent of overlap when frequency hopping (incompatible with -k)
  -k PERCENT, --crop PERCENT
                        percent of crop when frequency hopping (incompatible with -o)

Performance options:
  -s BUFFER_SIZE, --buffer-size BUFFER_SIZE
                        base buffer size (number of samples, 0 = auto, default: 0)
  -S MAX_BUFFER_SIZE, --max-buffer-size MAX_BUFFER_SIZE
                        maximum buffer size (number of samples, -1 = unlimited, 0 = auto, default: 0)
  --even                use only even numbers of FFT bins
  --pow2                use only powers of 2 as number of FFT bins
  --max-threads NUM     maximum number of PSD threads (0 = auto, default: 0)
  --max-queue-size NUM  maximum size of PSD work queue (-1 = unlimited, 0 = auto, default: 0)
  --no-pyfftw           don't use pyfftw library even if it is available (use scipy.fftpack or numpy.fft)

Other options:
  -l, --linear          linear power values instead of logarithmic
  -R, --remove-dc       interpolate central point to cancel DC bias (useful only with boxcar window)
  -D {none,constant}, --detrend {none,constant}
                        remove mean value from data to cancel DC bias (default: none)
  --fft-window {boxcar,hann,hamming,blackman,bartlett,kaiser,tukey}
                        Welch's method window function (default: hann)
  --fft-window-param FLOAT
                        shape parameter of window function (required for kaiser and tukey windows)
  --fft-overlap PERCENT
                        Welch's method overlap between segments (default: 50)


[user@host ~] soapy_power -r 2.56M -f 88M:98M -B 500k -F rtl_power -O output.txt --even -T 1 --debug
DEBUG: pyfftw module found (using 4 threads by default)
DEBUG: Applying fixes for RTLSDR quirks...
INFO: Using device: RTLSDR
DEBUG: SoapySDR stream - buffer size: 8192
DEBUG: SoapySDR stream - read timeout: 0.103200
INFO: repeats: 106667
INFO: samples: 640002 (time: 0.25000 s)
INFO: max_buffer_size (samples): 32768000 (repeats: 5461333.33, time: 12.80000 s)
INFO: buffer_size (samples): 647168 (repeats: 107861.33, time: 0.25280 s)
INFO: buffer_repeats: 1
INFO: overlap: 0.00000
INFO: bin_size: 426666.67 Hz
INFO: bins: 6
INFO: bins (after crop): 6
INFO: sample_rate: 2.560 MHz
INFO: sample_rate (after crop): 2.560 MHz
INFO: freq_range: 10.000 MHz
INFO: hopping: YES
INFO: hop_size: 2.560 MHz
INFO: hops: 4
INFO: min_center_freq: 89.280 MHz
INFO: max_center_freq: 96.960 MHz
INFO: min_freq (after crop): 88.000 MHz
INFO: max_freq (after crop): 98.240 MHz
DEBUG: Frequency hops table:
DEBUG:   Min:          Center:       Max:
DEBUG:     88.000 MHz    89.280 MHz    90.560 MHz
DEBUG:     90.560 MHz    91.840 MHz    93.120 MHz
DEBUG:     93.120 MHz    94.400 MHz    95.680 MHz
DEBUG:     95.680 MHz    96.960 MHz    98.240 MHz
DEBUG: Run: 1
DEBUG:   Frequency hop: 89280000.00 Hz
DEBUG:     Tune time: 0.017 s
DEBUG:     Repeat: 1
DEBUG:       Acquisition time: 0.251 s
DEBUG:     Total hop time: 0.282 s
DEBUG: FFT time: 0.103 s
DEBUG:   Frequency hop: 91840000.00 Hz
DEBUG:     Tune time: 0.010 s
DEBUG:     Repeat: 1
DEBUG:       Acquisition time: 0.251 s
DEBUG:     Total hop time: 0.272 s
DEBUG: FFT time: 0.006 s
DEBUG:   Frequency hop: 94400000.00 Hz
DEBUG:     Tune time: 0.010 s
DEBUG:     Repeat: 1
DEBUG:       Acquisition time: 0.252 s
DEBUG:     Total hop time: 0.266 s
DEBUG: FFT time: 0.004 s
DEBUG:   Frequency hop: 96960000.00 Hz
DEBUG:     Tune time: 0.010 s
DEBUG:     Repeat: 1
DEBUG:       Acquisition time: 0.253 s
DEBUG:     Total hop time: 0.267 s
DEBUG: FFT time: 0.004 s
DEBUG:   Total run time: 1.095 s
DEBUG: Number of USB buffer overflow errors: 0
DEBUG: PSD worker threads: 4
DEBUG: Max. PSD queue size: 2 / 40
DEBUG: Writer worker threads: 1
DEBUG: Max. Writer queue size: 2 / 100
INFO: Total time: 1.137 s


2017-03-17, 13:18:25, 88000000.0, 90560000.0, 426666.666667, 647168, -98.6323, -98.7576, -97.3716, -98.3133, -98.8829, -98.9333
2017-03-17, 13:18:25, 90560000.0, 93120000.0, 426666.666667, 647168, -95.7163, -96.2564, -97.01, -98.1281, -90.701, -88.0872
2017-03-17, 13:18:25, 93120000.0, 95680000.0, 426666.666667, 647168, -99.0242, -91.3061, -91.9134, -85.4561, -86.0053, -97.8411
2017-03-17, 13:18:26, 95680000.0, 98240000.0, 426666.666667, 647168, -94.2324, -83.7932, -78.3108, -82.033, -89.1212, -97.4499

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for soapy_power, version 1.5.0
Filename, size File type Python version Upload date Hashes
Filename, size soapy_power-1.5.0.tar.gz (18.8 kB) File type Source Python version None Upload date Hashes View

Supported by

Pingdom Pingdom Monitoring Google Google Object Storage and Download Analytics Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page