Northern Airborne Technology NTX - Manual (Page 15)

SM28 Rev. 4.10 NTX VHF-FM Series Remote Mount Transceivers Manual
Section 1 Description
1.1 Introduction
This manual contains information on the NTX VHF-FM Series Remote Mount
Transceivers. All derivative products will be covered by manual supplements, which can
be obtained from NAT as required.
Information in this section consists of purpose of equipment, features and specifications.
1.2 Purpose of Equipment
The NTX VHF-FM Series Remote Mount Transceivers are mounted using a custom 1/4
ATR tray and are operated using an NAT Tac/Com™ control head. The NTX066
models operate over 66 to 88 MHz on the VHF mid-band, and the NTX138 models are
capable of receiving and transmitting over 138 MHz to 174 MHz on the VHF high band.
Primary applications include airborne Search and Rescue, Law Enforcement and
Forestry communications.
1.3 Features
The existing Tac/Com™ series of control heads provide control for the transceivers.
The NTX066 range is 66.0000 to 87.9975 MHz, and the NTX138 VHF-FM models
cover a frequency range of 138.0000-173.9975 MHz, both in 2.5 kHz increments. A
maximum of 200 channels are available depending on the type of control head used.
Depending on the model selected, the channels can include a receive frequency and
CTCSS or DCS tone, transmit frequency and CTCSS or DCS tone, and an
alphanumeric identifier.
Depending on the model selected, the transceiver provides wideband or narrowband
receiver selectivity (selectable by the control head). Wideband operation provides a
bandwidth of 25 kHz and narrowband operation provides a bandwidth of 12.5 kHz.
The NTX138 transceiver can also be selected with an optional guard receiver installed or a
DF compatible output signal. The NTX138-100 provides a DF compatible output signal.
Voice Inversion Scrambling is available as an option, depending on the selected model.
A scan function allows scanning of selected channels. Transmit power of either 1 watt or 10
watts is selectable from the control head. Simplex and semi-duplex operations are available.
DTMF encoding and direct keyboard programming can be added using NAT's DTE12.
Jun 1, 2004 Page 1-1
ENG-FORM: 800-0106.DOT
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