User's Manual

Table 1-6 AES ID Type Labels
Name Label
ICAO Part 1 275
ICAO Part 2 276
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 1-14
3 JUN 10
F. Antenna Interface
The HSD-440 Mark 2 terminal interfaces to an
y mechanically-steered, conformal-array,
or phased-array antenna subsystems that are compatible with ARINC 741 and 781. The
antenna-pointing commands and status messages are communicated between the
HSD-440 Mark 2 Terminal and antenna subsystem over ARINC 429, multi-control,
top/port and/or starboard BITE and HPA mute buses, as defined in ARINC 741, Part 1.
HSD-440 Mark 2 Terminals support high gain antennas.
HSD-440 Mark 2 Terminals do not support the thir
d MCDU when a side-mount antenna
is installed.
G. CMU
Each HSD-440 Mark 2 Terminal can be connected to up to two ARINC 724B/758 CMUs.
A CMU is a g
eneral purpose instrument used to create and direct low data rate messages
to different ground-based systems, including airline headquarters and operations. The
CMU also provides access to Aero H/H+ PRT channels.
The CMUs operate in two modes: it can s
elect from a number of Satellite Service
Providers rather than Inmarsat only, or it can operate with no preferred Satellite Service
Provider.
The HSD-440 Mark 2 Terminal exchanges in
formation with the CMU over ARINC 429
interfaces. The default speed is low, but you can set the speed of the buses to high
through the ORT.
H. Antenna Subsystem RF Interface
The system RF parameters, such as cable losses and
antenna gain, are delimited to
make sure that the HSD-440 Mark 2 Terminal performance requirements are met. Refer
to "Installation" on page 3-1 for a definition of these parameters and their expected values.
5. User Interfaces
This section describes the HSD-440 interfaces that enable users to access Inmarsat services
and monitor the operation of the HSD-440 Mark 2 Terminal.
A. MCDU
The MCDU is a device that uses
an ARINC 429 interface per ARINC 739, which lets you
communicate with individual instruments on an aircraft, including the Flight Management
System (FMS), very high frequency (VHF) radio, and the HSD-440 Mark 2 Terminal. You
can make air-to-air and air-to-ground voice calls with the MCDU. You can also use the
MCDU to answer ground-to-air and air-to-air voice calls.