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TM 9-1656 Data Transmission System, M4, 1941

TM 9-1656 Data Transmission System, M4, 1941-01-15 Prepared under direction of the Chief of Ordnance CONTENTS Section I. General. Purpose 1 Scope 2 References 3 II. Description. Use 4 Principles of synchronous data transmission 5 Components. 6 Portable cables. 7 Main junction box 8 On-carriage wiring 9 Azimuth and elevation indicators, M4 10 Associated parts in other instruments 11 Repeaters and transmitters 12 Generating units, M4 13 Testing equipment 14 III. Operation. Orientation 15 Connecting and energizing the system 16 Synchronization 17 Application of data 18 Operation from commercial power supply 19 Removal from service 20 IV. Disassembly and assembly. Disassembly and assembly 21 V. Tests and adjustments. General 22 Initial adjustment (electrical). 23 Initial adjustment (mechanical) 24 Emergency trouble shooting 25 Adjustment of generating unit 26 Standard rotation of transmitters and repeaters 27 Section VI. Care and preservation. General precaution 28 Lubrication 29 Maintenance 30 Page Appendix. List of references 65 · Caption title · "January 15, 1941." · Includes bibliographical references (page 65)

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