NGT—Overview and specifications
34 NGT Transceiver System Technical Service Manual
Overview
The NGT is a transceiver that can be installed in a vehicle or used as a base station. The
minimum NGT system comprises:3434
• any one of:
• a 2010 RF Unit with 2030 Junction Box, or
• a 2011 RF Unit, or
• a 2012 RF Unit
• a 2020 Handset
The handset is a hand-held device with a microphone, PTT button, display and keypad. A
desk console unit for the handset is available for use in base stations.
The junction box is a unit to which the handset, 2010 RF Unit, speaker and related units
are connected in a complex system. In transceivers that use the 2011/2012 RF Unit, the
handset and speaker are connected to the RF unit via the handset and speaker connector
and 10-way connector.
The RF unit modulates audio signals received from the handset onto radio frequencies
and transmits these frequencies. It also demodulates received radio frequencies into
audio signals.
The 2010 RF Unit and 2030 Junction Box are connected together using a versatile and
flexible bus system called the Codan interconnect bus (CIB). Transceivers that use the
2011 RF Unit do not have system connection capabilities. Transceivers that use the
2012 RF Unit have limited system connection capabilities.
Figure 1: Relationship of the 2010 RF Unit, 2030 Junction Box, and 2020
Handset
SPEAKER
HANDSET
ANTENNA CONTROL
BATTERY
ANTENNA
RF UNIT
JUNCTION BOX
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