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.19
Revision 1 Jan 19, 2009
1.31 Label 254 - GBAS ID - Output
ARINC BIT DESCRIPTION SETTING
32 Parity Odd
31-30 SSM Normal Operation = 00
No Computed Data = 01
Functional Test = 10
Fail Warning = 11
29 - 24 Station ID Character 4 = 0 (NULL)
23 - 18 Station ID Character 3 = 0 (NULL)
17 - 12 Station ID Character 2 = 0 (NULL)
11 Spare = 0
10-9 SDI Not Used = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 254
Note: The GBAS ID label is output with NULL characters in provision for future GBAS applications and
for compatibility with equipment that uses this label when transmitting the GBAS ID / GLS Airport
ID label.
1.32 Label 255 - GBAS ID / GLS Airport ID #2 - Output
ARINC BIT
DESCRIPTION SETTING
32 Parity Odd
31-30 SSM Normal Operation = 00
No Computed Data = 01
Functional Test = 10
Fail Warning = 11
29 - 28 Data Source ID Forced = 0
27 - 25 Sel. Station Slot Forced = 0
24 - 19 Airport ID Character 1 (b6 - b1) ISO#5 Character [1]
18 - 13 Station ID Character 1 Forced = 0
12 Selected Uplink Forced = 0
11 Pilot Selection Forced = 0
10-9 SDI All Call = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 255
[1] Only upper case letters, numbers, and IA-5 “space” (“100000”) are used and encoded in bits b1
through b6. Bit b7 of the code may be reconstructed by taking the Complement of bit b6. Used in
conjunction with GBAS ID / GLS Airport ID #1 label 232 and set per contents of the FAS.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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