Northern Airborne Technology NT4xx - Manual (Page 7)

SM04 Rev. 4.00 UHF Transceiver Manual
Nov 27, 2003 Page 1-1
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 1.0 Description
1.1 Introduction
Tac/Com series transceivers have been optimized for full feature operation within the
total Tac/Com system architecture, and provide agile operation over a wide range of RF
frequencies.
Using a combination of serial and parallel tuning, these transceivers provide a simple
interconnect with powerful channeling ability. The design of the transceivers also
supports full encryption capability to DES 1027, or VGE formats without modification.
Subaudible (CTCSS) tone coded squelch and DPL coding are also fully supported.
Various levels of scanning are supported in these fast lock synthesized radios, such as
'PRIORITY' or 'SCAN' list formats. These modes can emulate multiple 'guard' receiver
operation under full control of the operator, and can be altered in the system software
(control head). The basic radio stores 32 frequencies within 2 pages of non-volatile
memory, any or all of which can be altered by the Tac/Com system control head as
needed by the operator.
1.2 Purpose of Equipment
These transceivers are designed to meet the difficult airborne requirements of law
enforcement and public service/public safety groups for tactical FM communication
systems. The Tac/Com series of radio control heads provide a centralized location for
tactical radio control of up to four transceiver systems, which can be of either NAT or
other manufacture. Alphabetic labeling or identification of each radio channel is
provided, as well as a display of receive and transmit frequencies, to ease pilot
identification of the selected channel. Intended for aircraft use, these components may
also be operated in vehicular applications (when correctly ordered) to provide the same
capability for communications vans, emergency site co-ordination, or surveillance.
1.3 Design Features
The Tac/Com transceiver family uses advanced technology microprocessor controlled
frequency synthesis, and NOVRAM channel data storage to provide its powerful
features. The radio itself is completely modular, facilitating quick repair and service.