PURPOSE AND SCOPE

This document defines the minimum operational performance specification for devices and systems mat prevent simultaneous transmissions in Air Traffic Control (ATC) two-way radio voice communications

The specification is intended to apply lo devices and circuitry which are an integrated feature of the design of future generations of two-way voice communication equipment. However, it is recognized that if they be required to be incorporated in current communicationss systems, the methods of t incorporating these devices will include retrofit, modification or add-on Circuitry.

Although this minimum operational performance specification is intended to apply to aircraft VHF communication equipment, it is recommended that it be applied also to ground-based and ground mobile aeronautical voice communications systems as appreciate.

Chapter 1 of this document provides information necessary to understand the need for the equipment characteristics and lasts defined in the remaining chapters. Typical equipment applications and operational objectives are described which are the basis for the performance criteria Specified in Chapter 2 and Chapter 3. Definitions essential to proper understanding of this document are also provided in Chapter 1.

Chapter 2 contains general design specifications.

Chapter 3 contains the minimum performance specification for the equipment, defining performance under standard operating conditions.

Chapter 4 specifies the environmental test conditions which provide a laboratory means of determining the overall performance characteristics of the equipment under conditions representative of those which may be encountered in actual operations.

Chapter 5 describes recommended test procedures for demonstrating compliance with Chapters 3 and 4.

Chapter 6 specifies the performance demanded of the installed equipment. Ground and flight tests for the installed equipment are included when performance cannot be adequately determined through testing under standard test conditions.