NOTE : The transmissions are only automatic or on ground request.
____
The ATSU broadcasts to the DIU the status of the datalink
communication: availability of the communication with the ground and
between the ATSU and the DIU.
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F. Landing Gear/ATIMS Interface The ATSU and both DCDUs receive three distinct discrete signals from the Landing Gear Control Interface Unit (LGCIU) to determine whether the aircraft is on ground or in flight. These discrets correspond to "Left hand gear compressed" information.
G. ATIMS/Air Conditioning Interface
The ATSU is ventilated in the electronics rack 80VU.
H. ATIMS/GPS Interface The GPS receiver can be the MMR2 or the GPSSU2 depending on aircraft configuration. It provides the ATIMS with UTC date and time.
6. Component Description
_____________________
**ON A/C 151-158, 201-209,
A. Air Traffic Services Unit (ATSU)
(1) Functional breakdown
(Ref. Fig. 012)
The ATSU functional breakdown consists of:
-
the hardware case containing the minimum software to enable the uploading of the different applications (the hardware resources and the part of interface services necessary to upload the ATSU).
-
the ATSU A/C INTERFACE software containing the functional services and the main part of the interface services.
-
the hosted applications (AOC applications).
The ATSU provides the applications with all the resources and
services required to perform their tasks.
(a)
Hardware resources
-computing capacities
-memory capacities
-hardware Input/Output capacities.
(b)
Functional services Functional services are high-level services and comprise:
-Air/Ground communication services . Air/ground Routing Function (ARF) . Communication subnetworks management . Communication subnetworks access . Messages formatting
-Human/Machine Interface (HMI) services . HMI resources (MCDU, printer...) management
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ATIMS - Functional Breakdown
Figure 012
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-On-board Integration Services . On-board data access and delivery for hosted applications . On-board data access and delivery for remote AOC applications (On-board routing function)
-System Management services . system configuration set-up . system status monitoring . system maintenance (BITE) . operating system to use and share the hardware resources.
(c) Interface Services The interface services are low-level services shared by the functional services and used to handle the ATSU interfaces:
-Discrete signals input or output management
-ARINC 429 broadcast and Williamsburg protocol
R **ON A/C 106-149, 151-156, 159-199, 201-299, 301-399, 401-499,
Post SB 46-1013 For A/C 151-156,201-209,
A. Air Traffic Service Unit (ATSU)
(1) Functional breakdown
(Ref. Fig. 012)
The ATSU functional breakdown consists of:
-
the hardware case containing the minimum software to enable the uploading of the different applications (the hardware resources and the part of interface services necessary to upload the ATSU).
-
the ATSU A/C INTERFACE software containing the functional services and the main part of the interface services.
-
the ATSU CONFIGURATION software for manufacturer configuration parameters
-
the ATSU ROUTER PARAMETERS software for the VHF DSP world map database
-
the hosted applications (AOC applications).
The ATSU provides the applications with all the resources and
services required to perform their tasks.
(a) Hardware resources
-computing capacities
-memory capacities
-hardware Input/Output capacities.
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(b)
Functional services Functional services are high-level services and comprise:
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