System Description
SystemDescriptionandInstallationManualforRangeFinder ICD10000‐01
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4.0 Overview
TheRangeFinderisasmall devicecapableof locatingaircraftinitsimmediate area anddeterminingranges.
RangeFinderisamemberoftheSagetechMXproductfamily.
RangeFinderperformsthefollowingbasicfunctions:
RangeFinding:
o Sendsout“all‐call”(broadcast)interrogations,listenstorepliesandreports
theinformation,
includingrange,tothecommandandcontrolinterface.
o Transmitsat1030MHzModeA,CandSAll‐CallATCRBS(PPM)interrogations.
o ReceivesModeA,C(PPM)andModeS(PPM)interrogationrepliesat1090MHz.
o Supportsonebottom‐locatedantenna.
o Calculatestargetranges
andtransmitsresultstoHostComputer.
o Rangeis<40NM
ADS‐BIn:
o TheMXRreceivesAutomaticDependentSurveillance‐Broadcast(ADS‐B)InExtendedSquitter
messages(ES)thathavebeentransmittedautomaticallyfromsurroundingplanes.
o ESmessagesreportPosition,Velocity,IdentificationandCategory,TargetStateand
Status,
andAircraftOperationalStatus.Fromthisdata,RangeFindergeneratesADS‐B,TIS‐Band
ADS‐Rreportsfordeliverytotheflightcomputerwhichcommunicatesthedatatotheuser.
o Range is limited by received signal strength and Minimum Threshold (MTL) =‐81 dBm @
RangeFinder
SMA.
ADS‐BOut:
o Provideshostcomputer‐controlled Automatic DependentSurveillance‐Broadcast(ADS‐B) Out
capability.
o Transmits ES messages at regular intervals, providing Position, Velocity, Identification and
Category,Emergency/PriorityStatus,TargetStateandSta tus, AircraftOperationalStatus,and
otheraircraftdata.
Altitude data for the ES can
be based on the Range Finder’s integrated altitude
encoder,oroneprovidedexternaltotheRangeFinder.
GPS data, also included in the ES, is provided to the Range Finder from the avionics
systemintegrator.
Receives Installation, Flight ID, Operational and GNSS navigation data from Host
Computeror
directlyfromsensors.
AltitudeEncoder:
o Computesown‐shipbarometricaltitudewithintegral,calibratedpressuresensorandencoder
(termedablindencoder).
SpecificaspectsoftheRangeFinderincludethefollowing:
GPSinputisacceptedfromthefollowingsources:viathehostinterfacecommandlink,orviaNMEAor
Accordserialformatsoverdedicatedpinsonthehostconnector.
OneTransponder/ADS‐BL‐Bandantennaisused.