CMC electronic Esterline CMA-5024 User Manual

INSTALLATION MANUAL
CMA-5024 GLSSU
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Page C.25
November 21, 2008
1.41 Labels 343 & 347 - Destination and Alternate Waypoint Horizontal Integrity Level - 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
28-18 Integrity Level (Note 1) 0 – 16 NM
17 PRAIM Unavailable (Note 2) Available = 0
Unavailable = 1
16 Sequence Bit (Note 3) Echoes Sequence Bit Received
from FMS
15-14 FMS Request Designator
(Note 4)
Power-up = 00
FMS 1 = 01
FMS 2 = 10
FMS 3 = 11
13-11 Integrity Seq Counter Acknowledge (Note 5) = 000
HIL at ETA = 001
HIL at ETA-5 minutes = 010
HIL at ETA+5 minutes = 011
HIL at ETA-10 minutes = 100
HIL at ETA+10 minutes = 101
HIL at ETA-15 minutes = 110
HIL at ETA+15 minutes = 111
10-9 Source/Destination Identifier Not used = 00
Unit 1 = 01
Unit 2 = 10
Unit 3 = 11
8-1 Octal Label 343 or 347
Note 1: The Integrity Level value is set full scale at power-up prior to the first request and when the value is
greater than 16 nm or cannot be computed. This field is undefined when the Integrity Sequence
Counter is “000”.
Note 2: The PRAIM Unavailable bit is set autonomously by the GLSSU such that no request is required for
updating this information. This bit is the logical “or” of bits 12 and 17 of the ETA Response Output
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 ETA Response Output
Label.
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.
Note 5: The Sequence Counter is to be set to the 000 state at power-up and prior to receiving the first request.
Subsequently this state is use to acknowledge a PRAIM request. The Integrity Level value is not to be
interpreted as valid when the Integrity Sequence Counter is 000.
34-52-81-1
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CMC electronic Esterline CMA-5024 Specifications

General

Brand	CMC electronic
Model	Esterline CMA-5024
Category	Accessories
Language	English