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inspectrum

inspectrum is a tool for analysing captured signals, primarily from software-defined radio receivers.

inspectrum screenshot

Features

  • Large (100GB+) file support
  • Spectrogram with zoom/pan
  • Plots of amplitude, frequency, phase and IQ samples
  • Cursors for measuring period, symbol rate and extracting symbols
  • Export of selected time period, filtered samples and demodulated data

Install

Linux

Install inspectrum with your package manager, it should be present in most distros.

macOS

Windows

Build from source

Prerequisites

  • cmake >= 3.1
  • fftw 3.x
  • liquid-dsp >= v1.3.0
  • pkg-config
  • qt5

Build instructions

Build instructions can be found here: https://github.com/miek/inspectrum/wiki/Build

Run

./inspectrum [filename]

Input

inspectrum supports the following file types:

  • *.sigmf-meta, *.sigmf-data - SigMF recordings
  • *.cf32, *.fc32, *.cfile - Complex 32-bit floating point samples (GNU Radio, osmocom_fft)
  • *.cf64, *.fc64 - Complex 64-bit floating point samples
  • *.cs32, *.sc32, *.c32 - Complex 32-bit signed integer samples (SDRAngel)
  • *.cs16, *.sc16, *.c16 - Complex 16-bit signed integer samples (BladeRF)
  • *.cs8, *.sc8, *.c8 - Complex 8-bit signed integer samples (HackRF)
  • *.cu8, *.uc8 - Complex 8-bit unsigned integer samples (RTL-SDR)
  • *.f32 - Real 32-bit floating point samples
  • *.f64 - Real 64-bit floating point samples (MATLAB)
  • *.s16 - Real 16-bit signed integer samples
  • *.s8 - Real 8-bit signed integer samples
  • *.u8 - Real 8-bit unsigned integer samples

If an unknown file extension is loaded, inspectrum will default to *.cf32.

Note: 64-bit samples will be truncated to 32-bit before processing, as inspectrum only supports 32-bit internally.