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.22
November 21, 2008
ARINC BIT DESCRIPTION SETTING
11 MSB of Satellites Visible
(Note 1)
>15 Visible = 1
15 or Less Visible = 0
10-9 Source/Destination Identifier Not used = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 273
Note 1: Number of satellites visible will be as defined in section 5.1.1.3 'Acquisition Mode' of this document.
Note 2: The number of satellites used to generate the navigation solution will be less than or equal to 12.
Note 3: The source is set to Primary when IRS/FMS port #1 or both ports receives label 203 or 361.
Note 4: The status is set to Not Present when neither IRS/FMS port receives label 203 or 361.
Note 5: The source is set to Primary when FMS/DADS port #1 or both ports receives label 203.
Note 6: The status is set to Not Present when neither FMS/DADS port receives label 203.
Note 7: Label 273 is not output in Self-Test mode.
Note 8: SBAS PA mode is not defined in ARINC 743A-4. Backward compatibility to ARINC 743A-2 is maintained
since bits 24 and 25 were unused in that characteristic and the SBAS modes will map to Navigation
mode for equipment that ignore these two bits.
1.37 Label 300 - DME Ground Station Identifier Words 1 & 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 - 27 Spare = 0 0 0
26 Character 2/4 0 = Second Character
1 = Fourth Character
25 - 19 Ground Stn. Ident. Char. #2 / #4 ISO#5 Character as per Look-Alike
DME Ground Station Identifier APD
18 Character ID 1/3 0 = First Character
1 = Third Character
17 - 11 Ground Stn. Ident. Char. #1 / #3 ISO#5 Character as per Look-Alike
DME Ground Station Identifier APD
10-9 SDI Not Used = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 300
Note: Label 300 is encoded in pairs where the first Label 300 contains characters 1 and 2, and the
second contains characters 3 and 4.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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