Scanner Codes & Signals Decoded

Short answer: this is a reference, not a radio. It decodes the most common 10-codes, fire and EMS codes and tones, plain-language signals, Q-codes from the ham, aviation and marine bands, CTCSS/PL, DCS and NAC tones, and how to read a RadioReference entry, including what encrypted DE and TE look like.

What's inside

• The most common 10-codes and why they vary by agency
• Fire and EMS codes, tones, and medical priority terms
• Plain-language signals and how to read them
• Q-codes and abbreviations from the ham, aviation, and marine bands
• CTCSS/PL tones, DCS, and NAC codes explained
• How to read a RadioReference entry, including what encrypted (DE/TE) looks like

Who this is for

New scanner owners who hear codes on the air and want to know what they mean. Pairs with any police scanner.

Frequently asked questions

Are 10-codes the same everywhere? No, they vary by agency and region, and many departments have switched to plain language. This guide explains the common ones and how to decode your local variations.

Does this include my county's specific codes? Codes are regional. The guide covers the national common set and how to research your area.

Delivery

Instant download. After checkout, the PDF is delivered by email through Shopify Digital Downloads. Read it on any phone, tablet, or computer. Personal use license: buy it once, keep it forever, use it in your household.

More from PoliceRadio.org: The Complete Police Scanner Handbook · scanners

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