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
