Specifications
Section-1 Introduction
October 17, 2013
1‐10
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1.6 TransmitterControlUnit(TCU)
Indual‐drivetransmittersystemswithredundantLPUs,theoptionaltransmittercontrolunit(TCU)servesasthe
maincustomerinterfaceandLPU(exciter)switcher.
Figure 1-8 Transmitter Control Unit (TCU) - Front Panel Lowered
TheTC
Ucontainsthefollowingmodularsubassemblies:
a. Agraphicaluserinterface(GUI)basedona5.25",color,1/4VGA,touchscreen,panelPC.
b. Aseriesoffrontpanelpushbuttonstoprovideimmediateaccesstothemostimportantcommandsandsta‐
tusinf
ormation.
c. Fourplug‐incircuitscards:
1. MCMboard(MainControlModule,onright)–Themaincontr olcardresponsible
fortransmittercontrolandcontrollingtheothercardsintheTCU.
2. PCMboard(ProcessControlModule,secondfromright)–Providestheenhanced
customerinterface,includingwebpagesservedtothelocalGUIscreenandweb
pagesand/orSNMPin
formationoverEthernettoaremoteuserasrequired.
3. LAX/VAXTCUInterfaceboard(thirdfromright)‐Interfacestoseveralofthesub‐
systemsspecifictoaVAXdualconfigurationsystem,suchastheRFswitchand
thesysteminterlockline.
4. CustomerI/Oboard(fourthfromright)‐Providesforallcustomerparallelin
ter‐
faceconnectionsontheI/Opanelontopofthetransmitter.
TheTCUalsocontainsabaseplaneboardtoprovideacommonbusforthevariousplug‐incardsandinternalpower
supplymodules.
,