TM 11-6625-2980-14
TABLE OF CONTENTS
Page Page
Section 0 INTRODUCTION 0-1 APPENDIX ATM 503 MAINFRAME
Section I. INSTALLATION PROCEDURE A-1
SECTION 1 OPERATING INSTRUCTIONS
Instrument Description 1-1 Section II. TM 503 OPERATING
INSTRUCTIONS A-3
Installation and Removal 1-1 Introduction A-3
BASIC OPERATION 1-2 Powering Up A-3
Period and Duration Selection 1-2 Building a System A-5
Duty Factors 1-2 Specifications A-6
Delayed and Paired Pulse Selection1-2
Transition Time Selection 1-3 Section III. TM 503 SYSTEM MAINTENANCE A-7
Transition Time Selection 1-3 General A-7
External Triggering and Gating 1-3 Troubleshooting Aids A-8
Trigger Output 1-4 Troubleshooting Techniques A-8
Manual Trigger 1-4 Parts Replacement A-10
Control Error Light 1-4 Diagrams and Circuit Board
Control Error Light 1-4 Illustrations A-14
OPERATING CONSIDERATIONS 1-4 Power Module Interface Pin
Output Termination’s and Assignments A-15
Connections 1-4 Detailed Block Diagram A-16
Connections 1-4 Parts Location Grid A-17
Rise Time Measurements in Linear Parts Location Grid A-17
Systems 1-5 Replaceable Mechanical Parts A-19
Counted Burst Using the DD 501 APPENDIX BREFERENCES
External Voltage Control 1-5
Digital Delay Unit 1-5
Definitions of Pulse Characteristics 1-8 APPENDIX C COMPONENTS OF END ITEM AND
SPECIFICATIONS 1-9 BASIC ISSUE ITEMS LIST
Environmental Requirements 1-11 Section I. INTRODUCTION C-1
Using the Rear Interface Scope C-1
Connectors 1-12 General C-1
Explanation of Columns C-1
SECTION 2 THEORY OF OPERATION
Introduction 2-1 Section II. COMPONENTS OF END ITEM C-2
Input Circuitry 2-1 Section III. BASIC ISSUE ITEMS C-3
~ TRIG'D/GATED Light Circuitry 2-1
Triggered Mode 2-1 APPENDIX DADDITIONAL AUTHORIZATION
Period Generator 2-2 LIST (Not Applicable)
Delay Generator 2-2
Duration Generator 2-2 APPENDIX EMAINTENANCE ALLOCATION
Duration and Delay Control Error Section I. INTRODUCTION E-1
Light Circuitry 2-3 General E-1
Variable Transition Time Circuitry 2-3 Maintenance Function E-1
Transition Time Control Error Column Entries E-2
Light Circuitry 2-3 Tool and Test Equipment
Level Control Multiplier 2-5 Requirement E-2
Output Amplifier 2-6
Power Supply 2-6 Remarks E-2
Section II. MAINTENANCE ALLOCATION
SECTION 3 SERVICE INFORMATION CHART OR PULSE
Symbols and Reference Designators3-1 GENERATOR AN/USM-359A E-3
General Maintenance and Section III. TOOL AND TEST EQUIPMENT
Adjustments 3-2 REQUIREMENTS FOR PULSE
Maintenance 3-2 GENERATOR AN/USM-359A E-5
Circuit Board Removal 3-2
Circuit Board Removal 3-2 APPENDIX FEXPENDABLE SUPPLIES AND
Test Equipment 3-2 MATERIALS LIST
General 3-2 Section I. INTRODUCTION F-1
SECTION 4 CONTROLS AND CONNECTORS Scope F-1
AND SCHEMATIC DIAGRAMS 4-1 Explanation of Columns F-1
SECTION 5 REPLACEABLE MECHANICAL Section II. EXPENDABLE SUPPLIES AND
PARTS LIST 5-1 MATERIALS F-2
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