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.10
November 21, 2008
1.17 Label 144 - Approach Area VIL - Output
ARINC BIT DESCRIPTION SETTING
32 Parity Odd
31-30 Sign Status Matrix (SSM) Failure Warning = 00
No Computed Data = 01
Functional Test = 10
Normal Operation = 11
29 Sign bit = 0 (positive)
28-12 Limit (in feet) 0-32768 (LSB weight 0.25)
11 Integrity Algorithm SBAS Integrity Prediction = 0
Look-Ahead RAIM = 1
10-9 Source/Destination Identifier Not used = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 144
Note: The setting of bit 11 to 1 when outputting the RAIM Integrity corresponds to the legacy encoding
for a prediction where baro-corrected altitude is not applied. A prediction that includes baro-
corrected altitude is not available. The GPS bus always sets bit 11 to 1. The GLS bus can
provide SBAS Integrity Prediction (bit 11 to 0) as requested by the APD; refer to Appendix D.
1.18 Label 146 - Satellite Deselect # 1 - 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 SVID 1 De-select =1
Enable =0
28 SVID 2 De-select =1
Enable =0
27 SVID 3 De-select =1
Enable =0
26 SVID 4 De-select =1
Enable =0
25 SVID 5 De-select =1
Enable =0
24 SVID 6 De-select =1
Enable =0
23 SVID 7 De-select =1
Enable =0
22 SVID 8 De-select =1
Enable =0
21 SVID 9 De-select =1
Enable =0
20 SVID 10 De-select =1
Enable =0
19 SVID 11 De-select =1
The document reference is online, please check the correspondence between the online documentation and the printed version.
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