System Description

System Description and Installation Manual for MXS ICD10004-01
© Sagetech Corporation 2018 Confidential Proprietary Export-Controlled Page 38 of 160
Reserved
Byte Offset Byte Name Field Description
08
RE0
This field is reserved for future use. Set to ZERO. All other values are invalid.
09
RE1
10
RE2
11
RE3
Table 0-9 Flight ID Message Example Data
4. Operating Message: Type 0x03
The operating message:
 Sets squawk code (Mode A/4096 Code), altitude data (if desired), heading, airspeed, MXS mode, and power up
state, and activates the IDENT function.
 Must be sent to the MXS periodically (between 1 and 5 hertz).
Note: The MXS’s integrated pressure altitude sensor and encoder provide the MXS with pressure
altitude data in the expected format and with the required accuracy. You can elect to use altitude
data from an external source. However, Sagetech recommends that you configure the MXS to use
the pressure altitude source integrated with the MXS (the default setting).
An overview of the Operating Message is shown in Table 0-10Table 6-10. Table 0-11Table 6-11 provides the detailed
message definition. An example of the Operating Message is found in Table 6-12.
Message Field Byte Values (original) Byte Message Content (Hex)
Start Byte
AA [ AA ]
Message Type
0x02 Flight ID Message [ 02 ]
Message ID
An arbitrary number between 0 and 255 (inclusive) that uniquely identifies the message. [ 02 ]
Payload Length
12 [ 0C ]
PAYLO
AD
Flight ID
Flight ID = AA1234 [ 41 41 31 32 33 34 20 20 ]
Reserved
[ 00 00 00 00 ]
Checksum
8-bit arithmetic sum of message from Start Byte to last byte of the Payload Data. [ 84 ]