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SDR 101

SDR 101: Unlocking The Airwaves

Welcome to the ultimate beginner's guide to Software Defined Radio. You don't need a math degree or a giant antenna to get started.

11Modules
7+Field Missions
10+Signals in Database
9+Software Tools
Start Here

The Invisible Highway

Radio waves are just invisible highways passing right through you. Learn how to 'see' them.

The Gear

Your First Radio

You don't need expensive gear. A $30 USB stick is your magic key to unlock the sky.

Fun Project

Catching Airplanes

Airplanes constantly shout their locations into the sky. We'll show you how to listen in and plot them on a map.

Space Lab

Satellite Images

Yes, you can actually pull live weather images directly from satellites passing over your house.

DSP

The Universal Remote

How software transforms one simple antenna into a tool that can decode almost anything.

Live Lab

Listen to the World

Tune into local walkie-talkies, public safety, and secret numerical stations broadcasting globally.

Database

Signal Matrix

Browse our interactive database of common RF signals, including frequencies, modulations, and hardware requirements.

Tools

Software Arsenal

The complete directory of SDR software tools, from beginner dashboards to advanced reverse engineering suites.

Field Ops

Mission Reports

Read detailed teardowns and field reports of real-world signal intercepts using the HackRF and PlutoSDR.

Try It

SDR Simulator

No hardware required. Try a full browser-based SDR simulation — tune frequencies, read the waterfall, decode signals.

IoT Lab

Sub-GHz Mastery

Master the world of short-range wireless. Explore garage doors, key fobs, and IoT sensors in the Sub-GHz band.

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