Northern Airborne Technology CC250 - Manual (Page 7)

CC450-0V2 Communications Controller
Installation and Operation Manual
Section 1 Description
1.1 Introduction
This manual contains information on the CC450-0V2 Communications Controllers. All derivative product
information shall be contained in the applicable manual supplement, which may be obtained from NAT as
required.
Information in this section consists of purpose of equipment, features and specifications. Review all
notes, warnings and cautions.
1.2 General Information
The CC450-0V2 is a compact, easy to install communications controller. It is designed to provide RELAY
and/or SIMULCAST operation for up to 4 transceivers. With these functions, the aircraft can become an
airborne repeater or a multi-frequency transmitting platform. When used to its potential, the CC450-0V2
provides increased efficiency and reduced workload for communication operations.
The CC450-0V2 Communications Controllers were designed to meet the requirement for expanded
operation of aircraft communications systems. Its modes of operation are: RELAY, SIMULCAST or
BOTH. All controllers are available with a Voice Store and Retransmit (VSR) option to increase single
radio capability.
RELAY operation is used when transmissions from one party must be re-transmitted from the aircraft to
reach groups on different frequencies or frequency bands, and when line-of-sight transmissions are not
possible.
SIMULCAST operation is used when a single transmission must reach groups operating on different
frequencies or frequency bands.
BOTH operation includes both RELAY and SIMULCAST functions, with priority given to the SIMULCAST mode.
Voice Store and Retransmit operation is used when two parties are unable to communicate directly due to
obstacles or distances that affect the transmission path. The transmission from one party is stored and
then retransmitted on the same channel to the other party.
1.3 Design Features
The CC450-0V2 requires only 0.75" of panel space and is available with +5 or +28Vdc panel lighting.
All audio inputs and outputs are transformer-coupled to provide full isolation from the existing audio
system. Bi-coloured annunciators on the front panel illuminate to indicate a RX or TX condition for each radio.
The Controller generates alert tones at the beginning and end of each transmission to indicate to the
operator that the CC450-0V2 is active.
In-band Voice Store and Retransmit option allows RELAY operation on one transceiver. This is
accomplished by storing RX audio (up to 16 seconds for the -xx1, or 60 seconds for the -xx2) in the
controller and then retransmitting the message out on the same radio.
Voice Activated Squelch Disable (squelch VOX) is provided for interfacing transceivers without a Squelch
Disable Output (only available on RT1 and RT2 for –xx1 models).
Section 1 Rev: 1.00 Issue 1 Page 1-1
ENG-FORM: 800-0112.DOT
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