Uploaded February 2026 | Updated September 2026, 3 weeks ago

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This video explains how tone-based, over-the-air messages can be used to disable the functionality of two-way analog radios and how this functionality can be tested.

Understanding 2 Tone Calling (Fire Tone Out): youtube.com/watch?v=RH0nfTowE5U

Understanding 5 Tone Calling: youtu.be/XbZtA702jWs

Understanding DTMF: youtube.com/watch?v=yx_2Yf2qrO8

Test and Measurement Fundamentals Playlist: youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8

The CMA180 radio test set:
rohde-schwarz.com/us/products/test-and-measurement/wireless-tester-rf-analyzer-generator/rs-cma180-radio-test-set_63493-56068.html

Timeline:
00:00 Introduction
00:16 Suggested viewing
00:39 Why disable a two-way radio?
01:46 About stun / kill
02:50 About the stun / revive and kill process
03:51 Stun / revive and kill in digital two-way radio systems
05:04 Testing stun, revive, and kill
06:07 Summary