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Radwin 2000 D+ User Manual

Radwin 2000 D+
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RADWIN2000D+UserManual Release3.6.00 B2
SingleAntennasatBothSites ChapterB
maintained.(Forexample,byusingdualpolarizationantennasacrosspolarizationseparation
isattained).
UponselectingAntennaTypeasDual,RADWIN2000D+automaticallyselectsthismodeand
doublestheairrates.
RADWINManagerindicatesacaseofunbalancedRSSbetweenthetwoantennasinthe
centerpanel.
DiversityMode
DiversityModeusestwoantennastoimprovethequalityandreliabilityofthelink.Often,
thereisnotaclearlineofsight(LOS)betweentransmitterandreceiver.Insteadthesignalis
reflectedalongmultiplepathsbeforefinallybeingreceived.
Eachsuch“bounce”canintroducephase shifts,timedelays,attenuations,andeven
distortionsthatcandestructivelyinterferewithoneanotherattheapertureofthereceiving
antenna.Antennadiversityisespeciallyeff ectiveatmitigatingthesemultipathsituations.
Thisisbecausemultipleantennasaffordareceiverseveralrecordingsofthesamesignal.Each
antennawillbeexposedtoadifferentinterferenceenvironment.Thus,ifoneantennais
undergoingadeepfade,itislikelythatanotherhasasufficientsignal.Collectivelysucha
systemcanprovidearobustlink.
Ante nnadiversityrequiresantennaseparationwhichispossiblebyusingadualpolarization
antennaorbytwospatiallyseparatedantennas.
UseDiversityinsteadofSpatialMultiplexinginthefollowingsituations:
WhenthesystemcannotoperateinSpatialMultiplexingMode
Whenoneofthereceivershashighinterferencecomparedtothesecondreceiver(i.e.
thesystemis“unbalanced”)
WhenyouachievehighercapacityinDiversityModethaninSpatialMultiplexingMode
WhenhighrobustnessisofimportanceandthecapacityofDiversityModeissufficient
(upto25Mbpsfullduplex)
B.2.2SingleAntennasatBothSites
Byselectingasingleantennaatbothsites,theODUsoperatewithasingleradiothatis
connectedtotheANT1connector.Thesecondradioisautomaticallyshutdown.
B.2.3SingleatOneSite,DualAntennasattheOther
InthismodeoneofthesitesusestheODUwithasingleantennawhiletheothersiteusesthe
ODUwithadualantenna.
Theadvantagesinthismodeincomparisontousingasingle antennainbothsitesare
doubledtotalTxPowerandadditionalpolarizationand/orspacediversity(dependingonthe
polarizationofinstalledantennas).
Theairratesused inthismodearesameaswhenusingsingleantennasinbothsites.

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Radwin 2000 D+ Specifications

General IconGeneral
BrandRadwin
Model2000 D+
CategoryWireless Access Point
LanguageEnglish

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