TECHNICAL NOTE – OPERATION OF MT4400 TWTA 08/10/2004
TN4400-3 MCL, INC. 2 of 36
TABLE OF CONTENTS
1.0 SAFETY SUMMARY ................................................................................................................ 4
1.1 Definitions of Warnings, Cautions, and Notes.................................................................4
1.2 General Safety Precautions...............................................................................................5
1.3 List Of Hazards.................................................................................................................6
2.0 SCOPE.........................................................................................................................................8
3.0 CONTROLS & INDICATORS.................................................................................................8
3.1 Discrete Status ..................................................................................................................8
3.2 Discrete Control................................................................................................................9
3.3 User Discrete Control & Status Interface .........................................................................9
3.4 Controls & Status via Communications Protocol.............................................................9
4.0 HPA OPERATION...................................................................................................................12
4.1 HPA Control Modes ....................................................................................................... 12
4.2 HPA Operating Modes.................................................................................................... 14
4.3 RF On/Off Control..........................................................................................................16
4.4 Faults & Alarms..............................................................................................................16
4.5 HPA Gain Control (Optional).........................................................................................18
4.6 Diagnostic Interface........................................................................................................19
4.7 Optional Linearizer.........................................................................................................27
4.8 Switchover Interface J8...................................................................................................27
4.9 Discrete Interface J5........................................................................................................28
4.10 Prevention of Excessive RF Input Power .......................................................................28
5.0 HPA INITIAL TURN ON........................................................................................................ 31
5.1 Initial Turn-On Check List..............................................................................................31
5.2 Operating Caution List....................................................................................................32
5.3 Power-Up Procedure – Remote Panel Usage.................................................................. 32
6.0 SHUT DOWN PROCEDURE ................................................................................................. 35
