Northern Airborne Technology NT4xx - Manual (Page 8)

UHF Transceiver Manual SM04 Rev. 4.00
Page 1-2 Nov 27,2003
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
The physical enclosures for the Tac/Com transceivers are die-cast, with fully RF
gasketed closures, to provide the most rugged possible unit. The design is qualified to
MIL-STD 810D for environmental performance.
Many new band splits are supported by the Tac/Com family, providing airborne systems
for new frequencies now required by land based law enforcement agencies and public
service groups. These new splits can be mixed with other existing equipment via the
Tac/Com control head to produce full function systems with minimum cost.
The thermal management of the radio is outstanding, resulting in minimal case
temperature rise regardless of operational cycles. This is a significant departure from
many existing systems which are at design limits even with low duty cycles.
A wide range energy conversion power supply is used in the transceivers for 28 VDC
operation, which significantly reduces both current consumption from the aircraft bus,
and waste heat generation.
All transceivers have the same mounting footprint, RF connector, and plug-compatible
interconnect, for ease of installation.
Unit covers have integral screws (anti-tamper) and hardware for ease of bench
servicing (no more lost screws). Mating logic/interface connectors use gold contacts,
and the Mil-spec type "N" RF connector is tarnish resistant, for improved performance in
humid environments.
1.4 Specifications
1.4.1 System Specifications
Frequency
range NT403 403-429.9875 MHz
NT450 450-469.9875 MHz
NT450A 470-487.9875 MHz
NT450B 482-499.9875 MHz
NT450C 494-511.9875 MHz
NT806 (TX) 806-824.9875 MHz
(TX&RX) 851-869.9875 MHz
Input
Power Nominal 28 VDC
Current
Consumption RX (squelched) 0.4-0.7 A (typ.)
TX 2.0 A (typ.)