User's Manual

FlexWave
®
Prism Remote Unit and RF Module Installation Guide FWPP-504-02
Page 20 © May 2017 CommScope, Inc.
Overview of RF Modules for Prism Remote Units
Duplexer and Low Noise Amplifier
TheRFModuleprovidestheRemoteUnitwithaninternalDuplexerthatisoptimizedtoprovidethedesiredRF
band-passfilteringandin-bandequipmentisolationbetweenFWDandREVpaths.TheDuplexerprovidesthe
filteringnecessarytothetransmitandreceivepathstoandfromtheconnectedantenna.
TheDuplexerfortheSingle-andDual-BayRFModulesandtheLegacyDual-Bay40WRFModulescontainsupto
twoREVpathLowNoiseAmplifiers(LNAforPRIand/orSECreversepaths).
TheDuplexerforanHDMRFModuledoesnothaveaLowNoiseAmplifier.
Duplexersarenotfieldserviceable.
Digital Processing Module
TheDigitalProcessingModule(DPM)isfoundonlyintheHDMRFModules.TheDPMprovidestheprimary
processingandlogicfunctionsfortheHDMRFModule.ItalsoprovidestheprimarypowerinterfacefortheHDM
RFModule,andconversionofthenative28
Vdcvoltagetolowervoltagesasnecessaryforfunctionality.
TheDPMhasaTransmit(Tx)BoardandaReceive(Rx)Board:
• TxBoard—providesbandspecificfilteringfortheintendedTransmitpath.
• RxBoard—providesbandspecificfilteringfortheintendedReceivepath.
Cables
AlwaysprovidedateachRFModuleshelfarefivecables:
• twoHigh-SpeedDataCables,whichinthisdocumentarereferredtoasLVDS(Low-VoltageDifferential
Signaling)cables
• twoRFCables(TX0/RX0)and(TX1/RX1)
• onePower(PWR)Cable.
TheRFModulecablesthatarepre-installedinthePRUconnecttothecorrespondingconnectorsontheRF
Module.TheRFModulecablescorrelatetotheantennaconnectorsonthebottomoftheRemoteUnitchassis.