Uploaded February 2026 | Updated September 2026, 3 weeks ago

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This video provides a brief overview of DTMF (dual tone multifrequency) tones and how they are used in two-way radio applications.

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

Timeline:
00:00 Introduction
00:12 What is DTMF
01:15 How DTMF is used in radio communications
01:32 DTMF and selective calling
02:32 DTMF and radio (system) management
03:47 DTMF and remote control
04:31 DTMF – tone frequencies
05:46 Testing DTMF in two way radio applications
06:48 Summary