Understanding 5 Tone Calling

This video explains the principles and use of 5-tone calling in two-way radio systems and how this functionality can be tested Test and Measurement Fundamentals Playlist: https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8 The CMA180 radio test set: https://www.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 00:13 What is 5 tone calling? 01:09 Applications of 5 tone calling 02:16 About standard tone sets 02:54 Standard tone frequencies 03:40 Special digits / tones 04:49 Standard tone durations 05:24 Testing 5 tone calling 06:20 Summary