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What’s a Police Scanner? A Complete Guide to Public Safety Monitoring

"A police scanner is a radio receiver capable of automatically tuning or "scanning" two or more discrete frequencies, stopping when it finds a signal on one of them. While colloquially referred to as a "police scanner," these devices are technically radio receivers designed to monitor various public service frequencies, including fire departments, emergency medical services (EMS), marine traffic, aircraft, and municipal utility operations. At its core, a police scanner allows enthusiasts and citizens to monitor real-time audio transmissions from public safety agencies. Historically, these devices utilized analog signals that were simple to int..."

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