Inspectrum

SDR & RF HardwareReady to RunLocation: /usr/bin/inspectrum

Command Line Execution

Run this command in the TelcoChisel terminal to launch or execute the tool:

Inspectrum Command
inspectrum --help

Detailed Technical Overview

Inspectrum is a dedicated offline spectral visualizer and analyzer for captured I/Q radio signals. It provides an intuitive, high-resolution spectrogram view with interactive cursors to measure symbol rates, identify preamble structures, and export demodulated symbols to SigMF format.

Configuration & Usage Guide

To initialize and configure Inspectrum for telecom security audits, follow these steps:

  1. 1Open an I/Q capture file: inspectrum capture.sigmf
  2. 2Adjust FFT size, zoom, and time resolution sliders in the UI.
  3. 3Enable cursors (Overlay -> Add cursor) to measure frequency shift and symbol duration.

Troubleshooting & Security Audits

Inspectrum Audit Warning
For large captures (>2 GB), ensure the file is on a fast NVMe drive or Toram RAM disk to prevent UI buffering pauses.
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Frequently Asked Questions

What file formats does Inspectrum support?

Inspectrum supports raw complex float32/int16 files, cs8/cs16 captures, and standard SigMF metadata.

How do I calculate symbol rate in Inspectrum?

Place the symbol cursor overlay over a train of symbols and adjust the rate slider until the vertical markers align with the signal transitions.

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