Specifications

Section-4 Theory
November 11, 2013
4‐18
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4.5 CustomerI/O Board
ThecustomerI/Oboardislocatedontopofthemaincabinetandprovidesparallelremotecontrol,statusandmeter
outputs.Thereare20commandinputs,20statusinputs,8analoginputsand8analogoutputs.SeeSection2.18on
page2‐33foradditionalinformationanddetailsontheremotecontrolconnectorsavailableonthecustomerI/O
board.
Input/Output(I/O)portsontheCustomerI/OBoardinclude:
• J1PumpModuleseeSection2.7.6onpage2‐9andexternalwiringdiagramforconnectiondetails.
• J2InterlocksseeTable2‐10onpage2‐20forconnections
• J3Control1seeTable2‐12onpage2‐34forconnections
• J4Control2seeTable2‐12onpage2‐34forconnections
• J5Control3seeTable2‐12onpage2‐34forconnections
• J6Status1seeTable2‐13onpage2‐35forconnections
• J7Status2seeTable2‐13onpage2‐35forconnections
• J8Status3seeTable2‐13onpage2‐35forconnections
• J9MetersseeTable2‐14onpage2‐37
• J10RFSwitchseeTable2‐15onpage2‐37
4.6 TransmitterRFSystem
4.6.1 ApexM2XExciter(s)
TheMaxivaULXseriesanalogtransmittercomesstandardwithasingleM2Xex citer.Asecondstandbyexciteris
availableasanoptionalongwithanexciterchangeoverswitchcardintheTCU.Operationandinformationaboutthe
M2Xexciteriscontainedintheinstructionmanualsshippedwiththeexciter.Ifthere
aretwoexciterstheoutputof
theexcitersareconnectedtotheexciterswitchcardinthemaincabinetTCU.Theselectedex citerthengoestoa
twowaysplitter,thentothepre‐drivers.Incaseswherethereisasingleex citerit’soutputgoesdirectlytothepre‐
driversviaatwowaysplitter.ForadditionalinformationontheM2Xexciterseetheexcitertechnicalmanualwhich
shipswitheachtransmitter.
4.6.2 Predriver
TheMaxivaULXpred riverprovidesredundantpowerandphaseadjustmentoftheRFdrivesignalforthe
transmitter.ThepredriveroperatesoverUHFTVfrequencybandsIV/V.Theunitincludesanaircooled28V4.5A
powersupply,phase‐n‐gainboard,RFamplifierandinterfaceboard.Thepredriverisdesignedto
performfollowing
functions:
• AmplifyandadjustthepowerleveloftheRFsignal(maxgain31dB).
• AdjustthephaseoftheRFsignal(range180°).
• Monitoroperatingparametersofsubassemblies
• ProvideconnectionwithTCUviainterfaceboard.