System Description

SystemDescriptionandInstallationManualforRangeFinder ICD10000‐01
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Step Message Msg
Direction
FieldName
18
 DataValues(Hex) Data/FunctionalDescription Doc.
Section
SurveillanceStatus [00] Noalertcondition
ReportMode [02] TrackMode
Checksum [ED] 8‐bitarithmeticsumofmessageStarttolastbyteofPayloadData.
11a ConstructandsendInterrogationCommand.
TheHostComputercansendinterrogationcommandsasneeded.
 Interrogation
Command
Sentfrom
host
StartByte [AA] 8.3.9
MessageType [A0] 
MessageID [00]
PayloadLength [06] 
InterrogationType [02] Mode Cinterrogation
Interrogation
Amplitude
[1A] 55dBm
AntennaSelect [00] UseInstallationdefault(bottomantenna)
ICAOAddress [000000] UsedonlyforModeSinterrogations
Checksum [6B]
11b ReceiveanddecodeAcknowledgeMessage(ACK).
ACKwillnotbereturnedifHostComputercommandsaninterrogationpriortocompletingpriorinterrogationcommandprocess.
SystemStateGPSDatafailflagisclearedassumingGPSDataisupdatedattherequiredrate
 Acknowledge
Message
Received
byhost
StartByte [AA] 

8.4.2



MessageType [80] 
MessageID [00]
PayloadLength [05] 
Ack’dMessType [A0] AcknowledgeModeCInterrogationrequest
SystemState [00] 
PressureAltitude [000277]
Checksum [C9] 
11c ReceiveanddecodeInterrogationResponseMessage.
NoModeCrepliestopreviousinterrogation
 ModeC
Interrogation
Response
Received
byhost
StartByte [AA]  
8.4.11


MessageType [A2]
MessageID [00] 
PayloadLength [00] NoModeCrepliestopreviousinterrogation
Checksum [C9] 
11a ConstructandsendInterrogationCommand.
TheinterrogationcommandisrepeatedthistimewithaWhisperShoutinterrogationtype.
 Interrogation
Command
Sentby
host
StartByte [AA]  8.3.10


MessageType [B0]
MessageID [00] 