Comtech-ef-data PCB-4000 Manual do Utilizador descarregar pdf (Página 29)

3–1

Chapter 3. INSTALLATION,

STARTUP,

AND

TROUBLESHOOTING

PROCEDURES



Comtech EF Data recommends that only qualified personnel familiar with high‐power

amplifiers,testequipment,andphase‐combinedsystemsattempt theproceduresprovi ded 

inthisappendix.Furthermore,beforeattemptinganyoftheseprocedures,youarestrongly

advisedto:



• Read Chapter 1. INTRODUCTION to become familiar with system terminology and

PCB‐40

001+1PhaseCombinerSystemTheoryofOperation.



• ReadChapter2. EXTERNALCONNECTORSto becomefamiliar with the PCCB external

connectorsandtheirfunctionality.



• ReadChapter5.SERIALREMOTECONTROLtobecomefamiliarwiththeserialremote

controlcommandsandqueries usedinthischapter.

3.1 Overview

AsexplainedinChapter1.INTRODUCTION,thePCB‐40001+1PhaseCombinersystemisaligned 

atthefactoryusinganetworkanalyzer.Allthatshouldberequireduponshipmentisforyouto

unpack,inspect,andassemblethe1+1phase‐combinedsystem–seeFigure3‐1foranasse

mbly

example–andtocompleteallrequiredcableconnections(Figure3‐2andFig ure3‐3).



Although th

e techniques featured in this appendix afford easy adjustment and setting of the

phase shifter for optimum output power combining over the full amplifier bandwidth,

alignmentinthefieldisgenerallynotrequiredandyouarestronglycautionedagainstmaking

unneededadjustments.However,ifyoureplaceanamplifierorothercri

ticalsystemcomponent

(e.g.,thePCB‐4000 unit),theproceduresprovidedin thisappendixexplainthestepsnecessary

torestorepropersystemoperation.Thisappendixalsoprovidesaverificationprocedureinthe

eventthatyoujustneedtoconfirmpropersystemoperation.



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Comtech-ef-data PCB-4000 Manual do Utilizador Página 29