alphafox02

alphafox02 / tetra-rtlsdr

Public

RTL-SDR front-end for TETRA/telive - replaces GnuRadio with a single C binary

22
2
100% credibility
Found Feb 20, 2026 at 13 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
C
AI Summary

This project turns a low-cost radio dongle into a TETRA signal decoder with scanning, multi-channel support, and live spectrum views for monitoring professional digital radio networks.

How It Works

1
🔍 Discover TETRA signals

You hear about hidden professional radio networks called TETRA and want to listen in using your cheap radio dongle.

2
📡 Set up your receiver

Plug in your radio dongle, get the free software ready on your computer, and prepare to explore the airwaves.

3
🕵️ Scan for active channels

Tell it to sweep a band like 380-400 MHz, and it quickly finds buzzing TETRA channels with signal strength and network details.

4
Choose your listening mode
🎯
Single channel

Tune to one frequency and pipe the decoded bits straight to the viewer app for clear network info and voice.

🌐
Multi-channel

It auto-finds and tracks multiple channels together, switching views to catch all the action.

5
📊 Watch the live spectrum

Open a web page or terminal view to see a colorful waterfall of signals, click to tune, and adjust gain on the fly.

🔊 Hear the radio chatter

Watch subscriber IDs, messages, and play voice calls in the companion viewer—your private window into professional radios is open!

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AI-Generated Review

What is tetra-rtlsdr?

This C binary turns your RTL-SDR into a drop-in front-end for TETRA decoding with telive and osmocom stacks, replacing the GnuRadio + simdemod3_telive.py chain entirely. Pipe its bitstream output straight to tetra-rx for frame decoding, or use multi-channel mode to demod up to 6 TETRA signals from one dongle's bandwidth. Features include CLI scanning (`-S 380e6:400e6`), web waterfall (`-w 8080`), ASCII spectrum (`-a`), and rtl_tcp for remote RTL-SDR Blog V3/V4 hardware on Linux.

Why is it gaining traction?

No GnuRadio bloat—just librtlsdr and liquid-dsp for a single executable that auto-discovers channels via background sweeps, avoiding manual tuning. Real-time spectrum lets you click-to-tune or add channels, with AFC UDP to telive for carrier tracking. Beats rtl-sdr scanner github tools by integrating directly with tetra-rx/telive workflows.

Who should use this?

Radio hackers intercepting TETRA networks (police/emergency) with cheap RTL-SDR dongles, especially on DragonOS or Linux setups feeding osmo-tetra. Ideal for multi-site monitoring where one device covers several channels, or quick field scans without heavy rtl-sdr software github deps.

Verdict

Promising rtl-sdr tetra front-end with stellar docs and screenshots, but 1.0% credibility from 10 stars means it's early—expect rough edges despite solid binary stability. Worth forking if GnuRadio frustrates your TETRA hunts.

(198 words)

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