AA4BD SDR Signal Spotter

See the Invisible — Identify Any Signal on Your Spectrum Analyzer

SDR Signal Spotter by AA4BD is your visual guide to reading and interpreting spectrum analyzer displays. Through clear, full-color images, this ebook walks you through real-world signal signatures — from broadcast FM and amateur bands to digital modes and interference sources.

Whether you're new to Software Defined Radio or looking to sharpen your signal identification skills, this guide gives you the visual vocabulary to know exactly what you're seeing on your waterfall or spectrum display.

• Full-color spectrum analyzer screenshots with labeled signal types
• Covers common amateur, broadcast, and digital mode signals
• Identify interference sources quickly and confidently
• Perfect companion for SDR# , GQRX, and other popular SDR software
• Instant digital download — start learning immediately