Specifications

Maxiva ULX Series
November 11, 2013
4‐19
888‐2628‐300 WARNING:Disconnectprimarypowerpriortoservicing.
Copyright©2013,HarrisBroadcast
Figure 4-10 Predriver Module Photo (module removed from Predriver assembly)
Thepredriverassemblyholdstwopredrivermodules.Themodulesareredundantandhotswappable.Seephotoin
Figure4‐10toaidinidentificationofpredrivermodulecomponents.
ThesinglerackunitpredriverassemblyhasoneRFinputandtwoRFoutputs,seeFigure4‐11onpage4‐20fora
schematicorientatedblockdiagramofthepredriverassembly.Itfeaturestwopredrivertrays(modules),eachof
whichdrivesitsownIPA.TheRFinputtothepredriverassemblyfeedsatwowaysplitter,theoutputofwhichfeed
thetwopredrivertrays.Theassemblyisdesignedsothatonepredrivertray
canberemovedforservicin gwhilethe
transmitteroperatesfromtheotherpredrivertra y.
ItshouldbenotedherethatonlyoneIPAdrivesthePAmodules,theotheristerminatedinaload.TheIPAoutputs
feedacoaxswitch,whichiscontrolledbythepowersupplymonitorboardintheTCUassembly.Thisallowseither
IPAtodrivethePAassembly.
Theinterconnectboardistheinterfacebetweenthetransmittercabinetwiringandeachpredrivertray.Each
predrivertrayhasaconnector,mountedonitsinterfaceboard,whichmateswithaconnectorontheinterconnect
board.Theinterfaceboardconnectstothefourboardsofthepredrivertray.