System Description

System Description and Installation Manual for MXS ICD10004-01
© Sagetech Corporation 2018 Confidential Proprietary Export-Controlled Page 137 of 160
Pressure Altitude
Byte Offset
Byte Name Field Description
06
PA0
PA0 PA1 Pressure Altitude
07
PA1 0x01
0x02
0xFF
0x80
0x40
0xEC
0xF7
0x00
8000 Feet
18,525 Feet
-225 Feet
Data is invalid
Pressure Altitude
The data is sent in the following format:
Sddddddd dddddddd
The S bit indicates whether the data is positive or negative. If the S bit is set to “ONE” then the data is
negative, if set to “ZERO” then the data is positive. The Pressure altitude is sent in feet with a
resolution of 25 feet.
A value of 0x8000 (-32768 decimal) indicates Pressure Altitude is invalid.
Note: Pressure Altitude is in 2's complement format.
Note: Pressure Altitude is relative to a standard pressure of 1013.25 millibars (29.92 in Hg).