System Description

SystemDescriptionandInstallationManualforRangeFinder ICD1000001
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8.3.7 TargetRequestMessage:Type0x0B
ThismessageisusedtorequestdataonADSB,TISBandADSRtargetsbeingtrackedbytheRangeFinder.
AnoverviewoftheTargetRequestMessageisshowninTab le819.Table820providesthedetailedmessage
definition.Anexampleofmessagecontentisfound
inTable821.
Table819TargetRequestMessagePayloadStructureOverview
PayloadIndex MessageField Numberbytes
00 RequestType 1
01 NumberofParticipants 2
03 ParticipantID 3
06 RequestedReports 1
Table820TargetRequestMessagePayloadStructureDetail
RequestType
ByteOffset ByteName FieldDescription
00 RT0 RequestType
0=TurnonAutoOutputofspecifiedreportsforNumberofTargets
10
1=ReturnSummaryof#Targets(andturnoffAutoOutput)
10
2=ReturnrequestedreportsforTargetID(andturnoffAutoOutput)
3=Turnoffallreportoutput.
NumberofParticipants
ByteOffset ByteName FieldDescription
01 NP0 NP0 NP1 #Participants
02 NP1 0x00
0x00
0x01
0x01
0x20
0xFF
0x00
0x90
32
255
256
404
NumberofParticipants(Forrequesttypes0and1only)
Values0to404accepted.
Allowsupto400targetsand3ICAOaddressduplicates,plusownship.
Iftherequestednumberofparticipantsislessthanthenumberdetected,onlytheclosestparticipants
arereported(includingownship,ifrequested,andduplicates).Ifreportingownshipisselectedinthe
SelectedReportsfield,in conjunction withturningonauto report,theownship is countedamongthe
numberoftargets.IfNumberofTargetsis1andOwnshipisselectedthenasingletargetisreported:
ownship.

10
NumberofParticipantsfieldneedstobecompletedforRequestTypes0and1.
Checksum 8bitarithmeticsumofmessagefromStartBytetolastbyteofthePayloadData. [39 ]