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.14
November 21, 2008
Note 1: The APD Selection is set by wiring the corresponding input discretes as follows: Open = 0,
Ground = 1. The encoding is binary i.e. "0000" is APD #0, "1111" is APD #15. Bit 26 is the
MSB.
Note 2: When synchronization is active, the APD data is reported; otherwise the unit corresponding to
the GLSSU SDI setting is reported as "Defined" (on) and the others as "Not Defined" (Off).
1.23 Labels 162 & 163 - Destination and Alternate Waypoint ETA - Output
ARINC BIT DESCRIPTION SETTING
32 Parity Odd
31-30 Sign Status Matrix (SSM) Fail Warning = 00
No Computed Data = 01
Functional Test = 10
Normal Operation = 11
29 Reserved Always = 0
28-24 Hours (Binary) (Note 1) Echoed from request
23-18 Minutes (Binary) (Note 1) Echoed from request
17 Date/Time (Note 2) GLSSU has determined time =0
GLSSU has not determined time =1
16 ETA Request Sequence BIT
(Note 3)
Sequence bit used to distinguish consecutive
requests with same ETA.
15-14 FMS Request Designator
(Note 4)
00 = Power-up State
01 = FMS 1
10 = FMS 2
11 = FMS 3
13 Request Bus Designator Response to Port 1 bus =0
Response to Port 2 bus =1
12 Invalid Almanac (Note 2) Almanac Valid =0
Almanac Invalid =1
11 Baro Corrected Altitude corrected altitude applied = 0
corrected altitude not applied = 1
10-9 Source/Destination Identifier Not Used = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 162 and 163
Note 1: The Hours and Minutes values are to be set to zero at power-up prior to the first request.
Note 2: The GLSSU sets the Date/Time and Invalid Almanac bits autonomously such that no request is
required to update this information. The PRAIM Unavailable (Bit 17) of the PRAIM HIL output
label is the logical “or” of bits 12 and 17 from this label.
Note 3: The Sequence Bit is set to 0 after power-up and prior to receiving the first request.
Subsequently the bit echoes the state of the FMS ETA Input label Sequence Bit (Bit 16) for
which this output is providing a response. This bit is logically the same as the Sequence Bit (Bit
16) in the PRAIM HIL Output Label. The sequence bit is used to distinguish consecutive
requests with the same ETA.
Note 4: The FMS Request Designator is set to 00 after power-up and prior to receiving the first request.
Subsequently the bit echoes the state of the FMS ETA Input label Requesting FMS SDI bits (Bit
15-14) for which this output is providing a response.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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