Challenge for 2026-10-26 - 2026-11-01
Category: 🖥️ - Difficulty: 🟠
Find and identify an unknown radio signal
Tune around the spectrum and find a signal you cannot immediately identify. Use a waterfall, a spectrum analyzer, online databases, or a SDR software to figure out what you're hearing. Where did you find the signal? What clues helped you identify it? What modulation or protocol did it use? Share a waterfall screenshot and explain your reasoning.
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