User's Manual

RLX2 Industrial Hotspot Series
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Page194of208 ProSoftTechnology,Inc.
 February5,2015
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Encryption
Methodofscramblingdatasothatonlytheintendedviewerscandecipherand
understandit.
ESD
ElectrostaticDischarge.Cancauseinternalcircuitdamagetothecoprocessor.
ESSID
ExtendedServiceSetIdentifier.Anameusedtoidentifyawirelessnetwork.
F
Firmware
Firmwareistheembeddedsoftwarecodethatthatrunsinthemoduletodirectmodule
function(similartotheBIOSinapersonalcomputer).Thisisdistinguishedfromthe
Setup/DiagnosticApplicationsoftwarethatisinstalledontheConfigurationPC.
Frequency Hopping
Aradiothatrapidlychangesitsoperatingfrequencyseveraltimespersecondfollowing
apre‐determinedsequenceoffrequencies.Thetransmittingandreceivingradiosare
programmedtofollowthesamefrequencyhoppingsequence.
Frequency Hopping Spread Spectrum
Changesorhopsfrequenciesinpatternknowntobothsenderandreceiver.FHSSislittle
influencedbyradiostations,reflections,orotherenvironmentalfactors.However,itis
muchslowerthanDSSS.
Fresnel Zone
Anellipticalareaoneithersideofthestraightlineofsightthatmustalsobeclearfora
long‐rangewirelessnetworktowork.
Full-Duplex
Acommunications circuitorsystemdesignedtosimultaneouslytransmitandreceive
twodifferentstreamsofdata.Telephonesareanexampleofafull‐duplex
communicationsystem. Bothpartiesonatelephoneconversationcantalkandlistenat
thesametime.Ifbothtalkatthesametime,theirtwosignalsarenotcorrupted.