User's Manual

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Chapter4 | WirelessSettings 
RadioSettings 
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Table4:TxPower(Continued) 
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20dBM(100mW)√
21dBM(125mW)√
22dBM(158mW)√
23dBM(199mW)√
24dBM(251mW)√
25dBM(316mW)√
26dBM(398mW)√
27dBM(501mW)√
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◆ ACKTimeout —Setstheacknowledgementtimeout,whichisusedprimarily 
forlong‐distanceconnections.Thistimeoutisusedtomakeanadjustmentfor 
linkdistance.Itisbasedontheamountoftime,inmicroseconds,thatitshould
taketotransmitaframetotheotherendofthelink,beprocessedbythe
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receivingdevice,andhavetheACKframecreatedandreturnedtothesending 
device.(Range:0‐255microseconds;Default:0microseconds) 
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◆ Fragmentation Thresh. — Sets the maximum frame size above which packets
arefragmented.Thisreducesthetimerequiredtotransmittheframe,and
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thereforereducestheprobabilitythatit willbecorrupted(atthecostofmore
dataoverhead).(Range:256‐2346bytes;Default:2346bytes)
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◆ RTSThreshold—Setsthepacket sizethresholdatwhichaRequesttoSend 
(RTS)signalmustbesenttoareceivingstationpriortothesendingstation 
startingcommunications.TheaccesspointsendsRTSframestoareceiving 
stationtonegotiatethesendingofadataframe.AfterreceivinganRTSframe, 
thestationsendsaCTS(cleartosend)frametonotifythesendingstationthatit 
canstartsendingdata.
IftheRTSthresholdissetto1,theaccesspointalwayssendsRTSsignals.Ifset to
2346,th eaccesspointneversendsRTSsignals.Ifsettoanyothervalue,and
 the
packetsizeequalsorexceedstheRTSthreshold,theRTS/CTS(Requestto
 Send/
CleartoSend)mechanismwillbeenabled.
Theaccesspointscontendingforthemediummaynotbeawareofeachother.
 The
RTS/CTS mech anism can solve this “Hidden Node Problem.” (Range: 1‐2346 bytes:
Default:2346bytes)
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◆ SGI—The802.11ndraftspecifiestwoguardintervals:400ns(short)and800ns 
(long).Supportofthe400nsShortGuardIntervalisoptionalfortransmitand 
receive.Thepurposeofaguardintervalistointroduceimmunityto 
propagationdelays,echoes,andreflectionstowhichdigitaldataisnormally 
verysensitive.EnablingtheSGIsetsitto400ns.(Default:Disabled)
Power Radio0(5GHz) Radio1(2.4GHz) 