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Table of Contents

                            Information
CONTENTS
Chapter 1  Inmarsat System
	1.1  System Overview
	1.2  Inmarsat C Services
	1.3  Communications Network
	1.4  Message & Signal Transfer
	1.5  Different Classes of Inmarsat-C MES
Chapter 2  Channel Types and Signal Processing
	2.1  Channel Types
	2.2  Signal Processing
Chapter 3  Block Description
	3.1  General
	3.2  Block Diagrams
	3.3  Functions of Each Board
	3.4  Antenna Unit (IC-112)
	3.5  Communication Unit (IC-212)
Chapter 4  Location of Parts
	4.1  Antenna Unit (IC-112)
	4.2  Communication Unit (IC-212)
	4.3  Distress Alert Unit/Received Call Unit (IC-302/303)
Chapter 5  Maintenance
	5.1  PV (Performance Verification) Test
	5.2  LED Check
	5.3  Check Points
	5.4  DIP Switch Setting
	5.5  Memory Contents Backed-up by Battery
	5.6  Updating System Program
	5.7  Replacement of Backup Battery
Chapter 6  Troubleshooting
	6.1  Self-Test
	6.2  Description of Status Monitor Display
	6.3  Error Messages
Appendix 1  Menu List
Parts List
Mechanical Parts List
Electrical Parts List
Circuit Diagrams