User Manual

MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
1
GENERAL
INFORMATION
INTRODUCTION
The MT-4E Receiver and Transmitter are FM
radio modules capable of analog operation
in 12.5 kHz (narrow band) or 25 kHz (wide
band) channels. A rmware upgrade may be
purchased to allow P25 digital operation. The
VHF modules operate over the band from 136
to 174 MHz and the UHF modules operate
over the band from 406 to 470 MHz and 799 to
869 MHz (transmitter) or 406 to 430 MHz, 450
to 470 MHz, 470 to 520 MHz, 799 to 824 MHz
and 851 to 869 MHz (receiver). Modular design
allows each of the Receiver and Transmitter’s
internal modules to be individually assembled
and tested, which facilitates construction, tuning,
and general maintenance.
The MT-4E Receiver and Transmitter combine
state of the art performance in a compact
modular enclosure for applications ranging from
remote mountain top repeaters to congested
urban radio environments. Each module is
characterized by dependable, low maintenance
performance under the most severe
environmental conditions.
NOTE: The transmitter is not to be operated as a
repeater under an existing base station license.
The MT-4E Receiver and Transmitter are
primarily software controlled radio modules,
allowing tuning, programming and maintenance
to be done via software service with few
hardware adjustments required.
The MT-4E series is compatible with all Daniels’
subrack and base station enclosures. It supports
a basic analog interface, and may be used in
a mixed system with MT-3 and MT-4 series
Receivers and Transmitters.
P25 Digital Mode
When the P25 rmware upgrade is purchased,
the MT-4E family of receivers and transmitters
may be congured for P25 digital operation,
or mixed mode operation. In a repeater
conguration, the receiver passes the complete
P25 digital voice packet directly to the
transmitter so no P25 digital information is lost.
All P25 specications, operational description
and information contained in this Instruction
Manual require the P25 rmware upgrade to
function. If the MT-4E Receiver and Transmitter
are purchased without the P25 rmware
upgrade, the radio will program and operate in
analog mode only.