User's Manual Part 1

Designing a Fusion Wideband Solution
Page 104 InterReach Fusion Wideband Installation, Operation, and Reference Manual
© 2013 TE Connectivity Ltd D-620616-0-20 Rev H • TECP-77-044 Issue 7 • May 2013
Theeffectofactivatingtheuplinkordownlinkattenuatorsistoreducethecoverageareaofthe
adjustedRAUband.Thecoverageradiuswillbereducedbyroughlyafactorof2.More
specifically,ifdisthecoveragedistancewithoutattenuationandd’isthecoverageradiuswith
theattenuation,then
wherePLSispathlossslope(dBm).
UsingtheUplinkALCSetting
Uplinkautomaticlevelcontrol(ULALC)circuitryforeachbandwithintheRAUprovides
automaticlevelcontrolonhigh‐powersignalsintheuplinkpath.Thisfunctionalityisrequiredto
preventRFsignalcompressioncausedbyasingleormultiplewirelessdevicesinveryclose
proximitytotheRAUband.Compressioncausessignaldegradationand,ultimately,droppedcalls
anddataerrors,andshouldbeprevented.TwosettingsareavailabletooptimizeULALC
performance:
• MultipleOp
erators:Usewhenmorethanoneoperatorand/orprotocolispresentinthe
FusionWidebandsystem’sbandfrequencyoradjacentfrequencybands.Thissettingismost
commonlyused.
• SingleOpe
ratorandProtocol:Usewhenonlyoneoperatorandprotocolison‐the‐airwithin
theFusionWidebandsystem’sconfiguredandadjacentfrequencybands.Thissettingis
seldomused.