Installation Manual Part 1
FCC ill: CDG-ARTU
MAGNASTAR
EXHIBITC
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
1.2
Equipment Description
The MagnaStar C-2<XX> system is designed with the business aircraft in mind. With two air-
ground voice channel operations as a standard feature, the C-2<XX> consists of an Airborne Radio
Telecommunications Unit (ARTU), an antenna, a duplexer, a mounting tray for the ARTU, one or more
Cabin Data Bus Repeaters (COBRs), and one to nine telephone handsets. Optional equipment includes one
to three Analog Interface Units (AlU), a Call Alerter Switch (CAS), Cell Phone Interface (CPI), Cockpit
Headset Interface Panel (CHIP), and other specialized devices.
A&JJ1: The ARTU provides the private automatic base exchange (P ABX) features, controls the C-2000
system. and contains the receiver-transmitter functions for radio transmission. This digital radio has been
implemented using state-of-the-art multiple digitaJ signal processor techniques to provide accurate
waveform control and noise-free, reliable communications in the noisy, fading. high-Doppler signal
environment seen in jet aircraft-to-ground communications. Reliability is further enhanced by the
automated assembly and test techniques used to manufacture the high density surface-mount-device circuit
cards. Should any problem occur, built-in-test identifies the source of the problem for quick circuit card
replacement and return of the unit to service.
Antenna / D~lexer: The antenna is a low drag, quarter wavelength design swtable for use on high
perforDJance jet aircraft. The duplexer is a passive signal filter-combiner that combines the receive and
transmit lines to the common antenna.
~: The data and control interface to the ARTU is by means of a high speed time division multiplexed
digital bus operating as a local area network (LAN). User interface devices such as handsets, fax machines,
modems, etc. connect to the system via this LAN. There are two different nx>dels of the CDBR. The
CDBR-l (~ell) provides for physical connection of up to two digital handsets (with their RJ-ll jacks
for the fax I modem connections) to the LAN bus. The CDBR-2 (model 2) provides two analog interface
connections, each of which can support either a four wire analog handset or two wire data for direct
connection of a fax machine or modem Additionally, the CDBR-2 provides a separate interface for
connection of a digital handset.
Di2ital Handset: The telephone handsets have been selected for performance and reliability. The handsets
contain noise-canceling microphones to overco~ the aircraft noise environment; audio is digitized at the
handset to further ensure clear communication. Special function keys and a liquid crystal display allow
easy use of all options available to the user. The digital handsets are offered with varied mounting
provisions to fit any installation requirement. Handsets are offered with a) a standard build-in style mount
to hold the handset when not in use, with a ratcheting cord reel, b) that version with a bulkhead mounting
adapter, c) the handset and cord reel without a mount, for custom mounting, and d) a "curly-cord" (like
standard office phones) with a plug for the ability to relocate the handset to various locations wired with the
matching jack. Variations a - c also are available with the RJ-ll jack remoted from the handset, to be
located where it best fits in the interior design of the aircraft. All variations come in four colors: white,
platinum, pepper dust, and black. Develop~nt is on-going for additional telephone handset options.
AllJ.: The AIU can be used to connect an analog SA TCOM unit, a Cel1 Phone Interface (CPI), a HF radio,
or a Public Address (P A) amplifier, and/or other communications devices to the MagnaStar system The
AIU bas been designed with electrical interfaces to optimize the connection to any analog-interface
SA TCOM system selected by the custo~. Separate connections are provided to accotmt for variations in
audio-line impedance and level and in the hook switch and status interfaces between SATCOM equip~nt.
HF radio connections can be made directly or through the aircraft audio control panel. The varying
requirements for the SA TCOM and HF interfaces led to an AIU design that offers the flexibility to connect
a wide variety of equip~nt and systems to the C-2000. AIUs interface to the ARTU over the LAN, like
the COORs.
RevB
1-3