User's Manual Part 2

Table Of Contents

Installing RAUs

InterReach Fusion Wideband Installation, Operation, and Reference Manual Page 135

800MHziDENDownlinkand850MHzCellularUplink

A2MHzfrequencygap(851–849MHz)separatesthe800iDENdownlinkand850Cellular

uplinkfrequencybands.Becauseofthisnarrowspacing,800iDENdownlinkintermodulation

productsmayfallwithinthe850Cellularuplinkband.Inaddition,800iDENdownlinksignals

neartheloweredgeofthebandat851MHzmaycausethe850Cellularuplinkautomaticlevel

control(ALC)circuitryintheRAUtoengageandtherebyreduceuplinkgain.

Topreventeitheroftheseconditions,usethefo

llowingguidelines:

• In‐ba

nd800iDENintermodulationproducts<‐90dBm

• Lowe

rfrequency800iDENsignals<–30dBmforFusionWideband

GivenatypicalDASconfiguration(4iDENcarriers,omni‐directional

antennas,lineofsight),these

guidelinestranslatetoanantennaspacing(d1)of6–9meters.

850MHzCellularDownlinkand900MHziDENUplink

A2MHzfrequencygap(896–894MHz)separatesthe850Cellulardownlinkand900iDEN

uplinkfrequencybands.Becauseofthisnarrowspacing,850Cellulardownlinkintermodulation

productsmayfallwithinthe900iDENuplinkband.Inaddition,850Cellulardownlinksignals

neartheupperedgeofthebandat894MHzmaycausethe900iDENuplinkALCtoengageand

therebyreduceuplinkgain.

Topreventeitheroftheseconditions,usethefo

llowingguidelines:

• In‐ba

nd850Cellularintermodulationproducts<‐90dBm

• Upperfrequency850Cellul

arsignals<–30dBmforFusionWideband

GivenatypicalDASconfiguration(6CDMAcarriersfo

rFusionWideband,omni‐directional

antennas,lineofsight),theseguidelinestranslatetoanantennaspacing(d2)of8‐14meters.

SpacingbetweenRAUsFSN‐8519‐1andFSN‐809019‐2shouldbeinarangeo

ffrom8to14

meters.

Connectapassivemulti‐bandantennatotheNconnectorontheRAU

usingcoaxialcablewiththe

leastamountoflosspossible.

CAUTION! Firmlyhand‐tightentheNconnector–DONOTover‐tightentheconnector.

 ConnectingtheAntennatotheRAU