Chapter 1: introduction, Model numbers – Codan Radio MT-4E Analog and P25 Digital - User Guide User Manual
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MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | USER GUIDE
Chapter 1: Introduction Page 1
CHAPTER 1: INTRODUCTION
This document is written as an introduction to Codan MT-4E Analog and P25 Digital Radio Systems.
The document assumes the reader is familiar with conventional Two-Way Radio Communications
systems.
Project 25 is a standards initiative, to be amended, revised and added to as the users identify issues
and as experience is gained.
MODEL NUMBERS
Daniels Electronics Ltd. has manufactured radio systems for more than 60 years. In the early years,
Daniels manufactured AM and SSB radiotelephones for the marine industry, and more recently, the MT
series of radios for mountain top repeaters and base station applications. Codan Radio Communications
continues to manufacture the MT series of Land Mobile Radio (LMR) systems.
MT-2
The MT-2 series of radio modules were originally manufactured in the 1980s. This radio series was a
crystal controlled analog radio system capable of wideband (25 KHz) operation. Although systems are
still in operation throughout North America, this series of radio modules was discontinued in the 1990s
and is no longer supported.
MT-3
The MT-3 series of radio modules were originally manufactured in the early 1990s. This radio series
was available with both crystal controlled and synthesized analog radio modules capable of wideband
(25 KHz) or narrowband (12.5 KHz) operation. The MT-3 radio modules were discontinued in 2006,
with the exception of the VHF Lowband and AM products. For more information on the MT-3 series of
radios, see the Codan MT-3 Analog Radio Systems User Guide.