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inspectrum

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

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

• Homebrew
• MacPorts

Windows

• radioconda
• conda

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.