User's Manual

70
AdvancedSettings
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Fields Description
RTS/CTSThreshold Determinesthepacketsizeofatransmissionand,throughtheuseofanAP,helps
controltrafficflow.Therangeis02347bytes.
BeaconInterval BeaconsarethepacketssendingbyAccesspointtosynchronizethewireless
network.Thebeaconintervalisthetimeintervalbetweenbeaconssendingbythis
unitinAPorAP+WDSoperation.Thedefaultandrecommendedbeaconintervalis
100milliseconds.
DTIM(DeliveryTraffic
IndicationMap)
ThisistheDeliveryTrafficIndicationMap.Itisusedtoalerttheclientsthat
multicastandbroadcastpacketsbufferedattheAPwillbetransmitted
immediatelyafterthetransmissionofthisbeaconframe.Youcanchangethe
valuefrom1to255.TheAPwill
checkthebuffereddataaccordingtothisvalue.
Forexample,selecting“1”meanstocheckthebuffereddataateverybeacon.
FragmentSize Alargedataframeisfragmentedintoseveralfragmentseachofsizeequalto
fragmentthreshold.Bytuningthefragmentthresholdvalue,wecangetvarying
fragmentsizes.
ShortGI(GuardInterval) AGIisaperiodoftimebetweensymboltransmissionthatallowsreflections(from
multipath)fromthepreviousdatatransmissiontosettlebeforetransmittinga
newsymbol.The802.11ndraftspecifiestwoguardintervals:400ns(short)and
800ns(long).Supportofthe400nsGIisoptionalfor
transmitandreceive.The
purposeofaguardintervalistointroduceimmunitytopropagationdelays,
echoes,andreflectionstowhichdigitaldataisnormallyverysensitive.