Digital Voice Systems VC-20-ATC-10B Specifikace stáhnout pdf (Strana 2)

FAA20 Embedded NEXCOM Vocoder

Board Manual

This manual has been prepared for the Federal Aviation Administration.

FA100-00107 (March 2004) – Rev 1.0.0 Page ii

Table of Contents

1.0 INTRODUCTION.................................................................................................................... 1

1.1 Purpose and Scope ........................................................................................................1

1.2 References .......................................................................................................................1

1.3 Notational Conventions ..................................................................................................1

1.4 Document Organization..................................................................................................1

2.0 GENERAL DESCRIPTION.................................................................................................... 3

2.1 Overview...........................................................................................................................3

2.2 Features............................................................................................................................4

3.0 CONNECTORS, CONTROLS, AND INDICATORS.............................................................. 5

3.1 Main Signal Connector ...................................................................................................5

3.2 Terminal Connectors ......................................................................................................9

3.3 Audio Connectors..........................................................................................................10

3.4 LED Indicators ...............................................................................................................11

3.5 Switch Controls ..............................................................................................................12

4.0 INSTALLATION.................................................................................................................... 13

4.1 Connecting to the FAA20.............................................................................................13

4.2 Setting up Switch Controls...........................................................................................13

4.3 Setting up Flash Configuration Parameters..............................................................14

4.3.1 Timing Configuration.............................................................................................14

4.3.2 Setting up the Audio Flow....................................................................................15

5.0 FUNCTIONAL DESCRIPTION............................................................................................ 17

5.1 Operational Modes........................................................................................................17

5.1.1 NORM Mode ..........................................................................................................17

5.1.2 VC20 Mode ............................................................................................................17

5.1.3 DEMO Mode ..........................................................................................................18

5.1.4 TEST Mode ............................................................................................................19

5.2 Interfaces ........................................................................................................................19

5.2.1 AUD Interface ........................................................................................................19

5.2.2 PCM Interface ........................................................................................................19

5.2.3 NIB Interface ..........................................................................................................20

5.3 Voice Processing...........................................................................................................22

5.3.1 AMBE+ Vocoder....................................................................................................22

5.3.2 Linear Voice Mixer ................................................................................................24

5.3.3 Packet Voice Router .............................................................................................25

5.3.4 PCM Rate Adapter ................................................................................................25

5.3.5 Tone Generator .....................................................................................................26

5.3.6 Gain, Attenuation, Mute (GAM)...........................................................................27

1 2 3 4 5 6 7 ... 108 109

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Digital Voice Systems VC-20-ATC-10B Specifikace Strana 2