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
