General description
2-6 Chapter 2: Introduction 98-158751-C
SDU Configuration Module (SCM)
The SCM contains non-volatile memory for storing the Secure Owner Requirement Table
(ORT) and the User ORT, which hold the system settings. The SCM contains a write-
protected area for storing installation data (system configuration, RF cable losses, antenna
system etc.) that are only updated during installation, and a user non-write-protected area
for storing a phone book and the customer-specific configuration parameters.
The SCM is an external module for the CSDU, making it easier to replace the CSDU
while retaining all system and user settings in the SCM. If the CSDU must be replaced,
the SCM remains installed in the aircraft. When the replacement CSDU is installed and
connected to the SCM the system user settings are available again.
The SCM, contains four Inmarsat BGAN USIM cards and one security SmartCard. In the
AVIATOR 700S System system, two USIM cards are used to access the Inmarsat
SwiftBroadband services and the remaining two USIM cards are reserved for future use.
The Security SmartCard contains integrity/ciphering keys and authentication algorithms
and is used by the Aircraft ACARS Gateway (AAGW). The SCM is delivered with all
five cards installed and these cannot be replaced in the field.
Multi-Carrier High Power Amplifier (MCHPA)
The CSDU interfaces directly to a MCHPA. The Multi-Carrier High Power Amplifier is
defined in Attachment 7 of ARINC 781-8 as a Line Replaceable Unit (LRU) that
amplifies the RF transmit signal to the correct high power levels required by a compact
aeronautical SATCOM system
MCHPA is connected to the CSDU via a RF coaxial interface, over which it receives its
RF input signal, a local oscillator reference signal and control signals. It is also connected
to the DLNA via a second RF coaxial interface, over which it transmits the RF output
signal.
The physical interface for the RF input and output signals and for the 115 V AC power
supply to the HPA 5015 is an ARINC 600 connector.
Operation with an MCDU and headset
You can operate the AVIATOR 700S system via the following user interfaces:
• Headset and MCDU connected to the CSDU to make and answer calls
• MCDU to display system messages (Information and BITE codes)
• Headset connected to the audio control panel to make and answer calls
Up to 3 MCDUs can be connected. System status and BITE messages of the
AVIATOR 700S system can be displayed in the MCDU display.
Other user interfaces
The AVIATOR 700S system has a dedicated AISD Ethernet interface for EFB or other
cockpit application requiring IP data communication services. It has also a dedicated
PIESD Ethernet interface for voice and data communications for passengers.
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