TECHNICAL NOTE – OPERATION OF MT4000 TWTA
10/24/03
TN4000-3
MCL, INC.
2 of 46
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 Controls & Indicators................................................................................... 9
3.2 Front Panel Display & Screen Content .................................................................... 13
4.0
HPA OPERATION ......................................................................................................... 21
4.1 HPA Control Modes................................................................................................. 21
4.2 HPA Operating Modes ............................................................................................. 24
4.3 RF On/Off Control ................................................................................................... 25
4.4 Faults & Alarms ....................................................................................................... 26
4.5 HPA Gain Control.................................................................................................... 29
4.6 Diagnostic
Interface.................................................................................................. 31
4.7 Optional Local Interface Override............................................................................ 38
4.8 Optional
Linearizer................................................................................................... 39
4.9 Switchover Interface J7 and Front Panel Controls ................................................... 39
4.10 User Interface J6....................................................................................................... 40
4.11 Prevention of Excessive RF Input Power................................................................. 40
5.0
INITIAL TURN ON OF THE HPA .............................................................................. 42
5.1 Initial Turn-On Check List ....................................................................................... 42
5.2 Operating Caution List ............................................................................................. 43
5.3 Power-Up
Procedure ................................................................................................ 44
6.0 SHUT DOWN PROCEDURE........................................................................................ 46
