INSTALLATION MANUAL
CMA-5024 GLSSU
This document includes Proprietary Information and shall not be reproduced or communicated to third party
without prior written permission by CMC Electronics Inc.
Page C.21
November 21, 2008
1.35 Label 272 - Weight and Balance Discrete Word - Input
ARINC BIT DESCRIPTION SETTING
32 Parity Odd
31-30 Sign Status Matrix (SSM) Normal Operation = 00
No Computed Data = 01
Functional Test = 10
Not Used = 11
29-28 Air/Ground Discrete Sign
Status Matrix
Normal Operation = 00
No Computed Data = 01
Functional Test = 10
Not Used = 11
27 Air/Ground Discrete Ground =1
Air =0
26-9 Not defined
8-1 Octal Label 272
Note: The GLSSU checks both the SSM for the word (bits 31-30) and the SSM for the discrete (bits
29-28). If either SSM does not indicate Normal Operation, then the GLSSU defaults the
Air/Ground discrete to the Air state.
1.36 Label 273 - GLSSU Status - Output
ARINC BIT DESCRIPTION SETTING
32 Parity Odd
31-30 Sign Status Matrix (SSM) Normal Operation = 00
No Computed Data = 01
Functional Test = 10
Failure Warning = 11
29 MSB of Satellites Used to Generate the
Navigation Solution (Note 2)
15 or less used = 0
28-24 GLSSU Operational Mode Self-Test (Note 7)
Initialization
Acquisition
Navigation
SBAS Navigation (Note 8)
SBAS PA (Note 8)
Altitude Aiding
Reserved
Aided
Fault
= 00000
= 00100
= 01000
= 01100
= 01101
= 01111
= 10000
= 10100
= 11000
= 11111
23-20 Number of Satellites Used to Generate the
Navigation Solution (0-12) (Note 2)
(0-C Hex)
19-16 Number of Satellites Visible (0-15) (Note 1) (0-FHex)
15 IRS/FMS Source
(Note 3)
Primary = 0
Secondary = 1
14 IRS/FMS Status
(Note 4)
Present = 0
Not Present = 1
13 FMS/DADS Source
(Note 5)
Primary = 0
Secondary = 1
12 FMS/DADS Status
(Note 6)
Present = 0
Not Present = 1
The document reference is online, please check the correspondence between the online documentation and the printed version.
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