Inspectrum
RF / DSP / IQFast, interactive tool for analyzing captured Software-Defined Radio IQ files, symbol extraction, and digital transmission reverse-engineering.
Inspectrum is an open-source RF & Baseband Reverse Engineering component included in TelcoChisel for telecommunications security auditing. It targets RF / DSP / IQ infrastructure for compliance with 3GPP and GSMA telecom security standards.
inspectrumHardware: HackRF / BladeRF / LimeSDR / USRP / RTL-SDRInspectrum — Radio Signal IQ Analysis & Symbol Extraction
Inspectrum is a specialized visualization tool for analyzing captured radio frequency signals recorded by software-defined radio hardware. Within TelcoChisel, Inspectrum supports SigMF (Signal Metadata Format), raw complex float/int files, and includes symbol alignment rulers for extracting raw digital bitstreams from wireless transmissions.
Key Capabilities
- High-Speed Spectrogram Navigation: Smooth zooming and panning through gigabyte-sized IQ recordings.
- Symbol Synchronization & Grid Overlays: Align symbol clock cursors to visually recover baud rate and digital modulation parameters.
- Amplitude, Frequency & Phase Plots: Derive FSK, PSK, and ASK digital demodulations visually and export recovered symbols directly to files.
Cheatsheet
1. Open SigMF Recording
# Open raw IQ capture file in inspectrum
inspectrum /var/captures/cellular_downlink.sigmf-data
2. Export Extracted Symbols to Bitstream
# Add Amplitude Plot -> Add Derived Threshold -> Export Symbols to text file
Practice in TelcoSec Academy
👉 Access Radio Signal Reverse Engineering Labs at App.TelcoSec.Net
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