Specifications

Section-1 Introduction

November 11, 2013

1‐8

WARNING:Disconnectprimarypowerpriortoservicing. 888‐2628‐300

Thediagnosticport showninFigure1‐6allowstheoperatortoconnectdirectlytothemodulewithahandheldPA

diagnosticunitandobtainPSvoltages,faultstatus,FWDandREFRFpowerlevelsandinternaltemperatures.The

diagnosticportandhandheldunitcanalsobeusedtoreprogramthemoduleCPLDasrequired.Thepartnumberfor

thehandhelddiagnosticsunitkitis971‐0040‐081.Thepartnumberfor

thediagnosticsunittechnicalmanualis888‐

2765‐001.

Figure 1-7 ULX PA Module (top view, cover removed)

EachPAmoduleconsistsofthefollowingcomponents:

a. MonitorBoard‐Responsibleforallmonitoringandprotectionofthemodule.Reportstothetransmitter

TCUviatheparallelcontrollines.

b. ConnectorI/OBoard‐I/OConnectorBoardprovidesinterfaceconnectionsbetweenPAModuleandtrans‐

mitterbackplane.Theboardincludesasinglehybridconnectorononesideandfiveconnectorsonthe

otherside.Thelargehybridconnectorinterfaceswithmatingconnectoronthebackplaneboard.Itcon

‐

tainssevenACcontacts,twenty‐foursmallsignalcontacts,andasingleRFcoaxialconnector.

c. ACDistributionBoard‐TheACdistributionboardprovidesthreephaseACtotheeightpowersupply

boards.ItalsoprovidesAClinefiltering,step‐startfunctionandtransientprotectionforthemodule.

d. PowerSupplyBoards‐TheeightAC/DCpowersuppliesprovide44VDCto50VDCpowertoeachpairofFETs

onthefourPApallets.Voltagevarieswithmodulationtypeandchannel.

e. SplitterBoard‐ThesplitterboardequallydividestheRFsignalbetweenfourpoweramplifierpallets.The

splitterisbroadband(coversbandIV/V).ThesplitterboardalsodeliversadetectedRFsampletothemoni

‐

torboardtoindicateinputpowerlevelandprovideprotectionfromexcessiveinputdrivepower.

f. SignalDistributionBoard‐SignalDistributionBoardservestorouteanaloganddigitalcontrolandmonitor‐

ingdatabetweenfourPAmoduleboardsubassemblies,monitorboard,PApallets,connectorI/Oboard,

and4‐waysplitterboard.

g. LDMOSAmplifierPallets‐Therearefoursinglestageamplifier palletsoperatinginparallelinthePAmod‐

ule.

h. CombinerBoard‐TheboardcombinestheRFoutputsofthefouramplifierpallets,anddeliversthecom‐

binedsignaltotheoutputport.Thecombinerisbroadband(coversbandIV/V)andrequiresnotuning.The

combiningofthesignalsisaccomplishedusinghybridcombinersinseries.Thefirststageisatwo‐way3dB

Coolant

In/Out

RF Out

Coolant