Codan MT-4E Manuale operativo
www.codancomms.com
MT-4E Analog and
P25 Digital
Radio Systems
MAINTENANCE GUIDE
MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | MAINTENANCE GUIDE
Page i
Codan MT-4E
Analog and
P25 Digital
Radio Systems
Maintenance Guide
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Page ii
© 2013 Codan Limited.
No part of this guide may be reproduced, transcribed, translated into any
language or transmitted in any form whatsoever without the prior written
consent of Codan Limited.
CODAN™, NGT™, Easitalk™, CIB™ and CALM™ are trademarks of
Codan Limited. Other brand, product, and company names mentioned
in this document are trademarks or registered trademarks of their
respective holders.
The English version takes precedence over any translated versions.
NOTE
DOCUMENT REVISION
DEFINITION
Codan Communications
43 Erie Street, Victoria, BC
Canada V8V 1P8
www.codancomms.com
Toll Free Canada and USA:
Phone: 1-800-664-4066
Fax: 1-877-750-0004
International:
Phone: 250-382-8268
Fax: 250-382-6139
PRINTED IN CANADA
Document Number:
Revision:
Revision Date:
MG-001
6-0-0
September 2013
Documentation uses a three-level revision system. Each element of
the revision number signifi es the scope of change as described in the
diagram below.
Major Revisions:
The result of a major change to
product function, process or requirements.
Minor Revisions:
The result of a minor change to
product, process or requirements.
Editorial Revisions:
The result of typing corrections or
changes in formatting, grammar or wording.
1-0-0
Three-level revision numbers start at 1-0-0 for the fi rst release. The
appropriate element of the revision number is incremented by 1 for each
subsequent revision, causing any digits to the right to be reset to 0.
For example:
If the current revision = 2-1-1 Then the next major revision = 3-0-0
If the current revision = 4-3-1 Then the next minor revision = 4-4-0
If the current revision = 3-2-2 Then the next editorial revision = 3-2-3
Document revision history is provided at the back of the document.
MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | MAINTENANCE GUIDE
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Codan Communications is a leading international designer and
manufacturer of premium communications equipment for High
Frequency (HF) and Land Mobile Radio (LMR) applications. We’ve
built our reputation for reliability and customer satisfaction over 50
years in radio communications, in some of the toughest conditions
on the planet.
For over 50 years Codan has provided customers in North America
and internationally with highly reliable Base Stations and Repeaters
that are environmentally robust to operate in rugged and extreme
temperature conditions where low current consumption (solar
powered) is a key requirement.
Codan is a pioneering member of the P25 Digital standard, for radio
system interoperability between emergency response governmental
organizations, providing enhanced functionality and encryption.
Our products operate between 29 - 960 MHz and are available in
a variety of Base Station and Repeater confi gurations for two way
voice and mobile data applications.
Our self-servicing customers range from Forestry and National Park
services through Police and Fire departments and on to Utility and
Transportation groups. Our products have been deployed in every
imaginable situation from the Antarctic to Hawaiian mountaintops to
Alaska, enabling respondents to Forest Fires, Ground Zero rescue
and routine patrols.
Codan is an industry leader in Analog and P25 radio systems design.
We off er modular rack-mounted Base Stations and Repeaters
capable of operating in Low Band VHF,VHF AM , VHF FM, UHF FM,
700 MHz, 800 MHz, 900 MHz
ABOUT CODAN
COMMUNICATIONS
On August 7th, 2012 - Codan Limited (ASX: “CDA”) announced
the acquisition of Daniels Electronics Limited, a leading designer,
manufacturer and supplier of land mobile radio communications
(LMR) solutions in North America. The acquisition of Daniels delivers
on Codan’s stated strategy of growing market share and diversifying
its radio communications product off ering. Codan Limited designs,
manufactures and markets a diversifi ed range of high value added
electronic products, with three key business divisions; radio
communications, metal detection and mining technology.
DANIELS ELECTRONICS
IS NOW CODAN
COMMUNICATIONS
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
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Codan Communications provides many resources for the testing,
tuning, maintenance and design of your Codan MT-4E Analog and
P25 Digital Radio System.
Instruction Manuals
Codan instruction manuals are very comprehensive and include
information on:
Theory of operation
Detailed Specifi cations
Testing and tuning instructions
Component layout illustrations
Instruction manuals can be obtained from the factory.
Technical Notes
Technical notes outline key aspects of tuning, installing,
maintaining and servicing Codan Radio Systems.
Technical Notes can be found online at www.codancomms.com.
Codan MT-4R/D and IFR 2975 Test Procedures (TN950)
Technical Note TN950 is an aid to confi guring and testing Codan
MT-4R/D radios using an IFR 2975 Service Monitor by Aerofl ex.
TN950 is intended to be used with IFR 2975 Setup fi les that can be
loaded into the Service Monitor.
TN950 and Setup Files can be found online at www.codancomms.
com and can also be found on the Aerofl ex web page at www.p25.
com.
Application Notes
Application Notes provide an overview of the range of applications
in which Codan Radio systems can be used.
Application Notes can be found online at www.codancomms.com.
P25 Training Guide
The P25 Training Guide provides the reader with a simple, concise
and informative description of Project 25.
The P25 Training Guide can be found online at
www.codancomms.com.
MT-4E Analog and P25 Digital Radio Systems User Guide
The MT-4E User Guide provides an overview of the confi guration,
operation and programming of Codan MT-4E radios.
The MT-4E User Guide can be found online at www.codancomms.
com.
RESOURCES
MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | MAINTENANCE GUIDE
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Contents
Chapter 1: Codan Radio Maintenance ...................................1
Introduction to Codan MT-4E .....................................................................1
Recommended Maintenance Schedule .....................................................2
Repair Note ................................................................................................2
ESD - Electrostatic Discharge ....................................................................2
Audio and Carrier Levels Reference ..........................................................3
Audio Levels ...................................................................................................3
Carrier Levels .................................................................................................3
Chapter 2: Installation ............................................................5
Installation of Codan Subracks .................................................................. 5
Chapter 3: Test Equipment and Spares .................................9
Recommended Test Equipment .................................................................9
Recommended Spares ............................................................................ 10
Recommended Maintenance Items ......................................................... 11
Chapter 4: Radio Site Survey .............................................. 13
Introduction to a Radio Site Survey ......................................................... 13
Codan Radio Site Checklist and Inventory ....................................................13
Preparation for a Site Survey ................................................................... 14
Exterior Site Survey ................................................................................. 15
Interior Site Survey .................................................................................. 15
Radio Site Inventory ................................................................................. 15
Radio System Testing .............................................................................. 16
Departure Checklist ................................................................................. 16
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
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Chapter 5: Codan Radio System Testing ............................. 17
MT-4E Testing with the IFR 2975 by Aerofl ex .......................................... 17
General Set-Up and Connections ............................................................ 18
Uploading Codan Confi gurations to the IFR 2975 .........................................18
Radio Service Software (RSS) ......................................................................19
Control Cards ................................................................................................19
Adapters, Cables and Extender Cards ..........................................................19
Codan MT-4E Radio System Test Sheet .......................................................19
Turning OFF the MT-4E Receiver and Transmitter Modules .........................20
Audio Connections ........................................................................................21
System Regulator Testing ........................................................................ 22
System Voltage Testing .................................................................................22
Receiver Testing ....................................................................................... 23
Receiver Analog Testing ................................................................................23
Receiver Digital Testing .................................................................................28
Receiver Bit Error Rate Testing .....................................................................30
Receiver RF Preselector Alignment and Tuning ............................................32
Receiver Reference Oscillator Adjustment ....................................................34
Transmitter Testing ................................................................................... 37
Transmitter Analog Testing ............................................................................37
Transmitter CTCSS Testing ...........................................................................42
Transmitter Digital Testing .............................................................................45
Transmitter Modulation Fidelity Testing .........................................................47
Transmitter Reference Oscillator Adjustment ................................................49
System Testing ......................................................................................... 51
Duplex Analog Testing ...................................................................................51
Duplex Digital Testing ....................................................................................54
Chapter 6: Additional Radio System Tests ........................... 57
Radio System Testing Through Filtering Equipment ................................ 58
Radio System Testing with the Antenna Connected ................................ 59
VSWR ............................................................................................................59
Receiver Desense .........................................................................................60
RF Carrier Signal Levels on Links between Sites .........................................61
Spurious Signals over the Air ........................................................................62
Chapter 7: Blank Worksheets .............................................. 63
MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | MAINTENANCE GUIDE
Chapter 1: Codan Radio Maintenance Page 1
CHAPTER 1: CODAN RADIO MAINTENANCE
This document is written as a maintenance guide to Codan MT-4E Analog and P25 Digital Radio Systems.
The document assumes the reader is familiar with conventional Two-Way Radio Communications
systems and general electronics maintenance practices. This document is a companion document to
the Codan Communications MT-4E Analog and P25 Digital Radio Systems User Guide.
INTRODUCTION TO CODAN MT-4E
Codan MT-4E radio systems are designed for operation in highly varied conditions. Your application
may require high performance radio systems (intermodulation and selectivity) for operation in congested
radio sites, operation over wide temperatures using battery solar powered systems (low current drain),
or a confi gurable system for emergency deployment in a transportable case. Codan manufactures a
diverse range of radio products tailored to the type of operation you need.
The MT-4E radio system is characterized by high performance and reliability, whether it is a remote,
low current repeater or a high performance base station. The total system is designed to provide
dependable, low maintenance performance and great fl exibility for expansion and servicing.
The MT-4E series of radio and control modules are packaged in the compact Eurostandard housing with
anodized aluminum front panels, and are ruggedly designed for remote or transportable applications.
All of the modules use high reliability components and corrosion resistant fasteners.
The MT-4E radio system is specifi cally designed to deliver high performance under adverse conditions.
Voltage stress testing and a 24 hour burn-in is performed on the radio system and performance of the
system at room temperature (25°C) is documented and measured. As an option, extensive environmental
testing can be conducted over the temperature range - 30°C to + 60°C and the performance measured
to ensure compliance with the design specifi cations.
A Codan MT-4E radio system consists of separate RF receiver and transmitter modules plugged into
a standard 19” subrack. Each subrack also requires a control card and system regulator. External
connections to the system (COR, PTT, audio, channel select, etc.) are made through an auxiliary
connector on the rear of the subrack. An optional cable or terminal strip connector is available to
connect externally through the auxiliary connector to the radio system.
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Chapter 1: Codan Radio MaintenancePage 2
RECOMMENDED MAINTENANCE SCHEDULE
Codan Communications does not recommend any specifi c maintenance schedule for our MT-4E
radio systems. Many organizations have annual preventative maintenance scheduled as part of their
standard maintenance procedures; other organizations will only maintain the radio system when a
system failure occurs; and other organizations will use a combination of preventative maintenance and
maintenance for failures.
REPAIR NOTE
The MT-4E Radio System employs a high percentage of surface mount components which should not
be removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount
components should be performed only with specifi cally designed surface mount rework and repair
stations complete with Electrostatic Discharge (ESD) protection. When removing Surface Mount Solder
Jumpers, it is recommended to use solder wick braid in place of vacuum type de-soldering tools. This
will help prevent damage to the circuit boards.
ESD - ELECTROSTATIC DISCHARGE
Static Electricity can damage electronic equipment, causing it to stop functioning immediately, or
degrading it, leading to breakdown later. Static sensitive parts should be handled by technicians
grounded with wrist and/or two heel straps. Transferring of ESD sensitive components to or from
diff erent areas should be conducted in ESD safe bags, tote boxes or carts.
Altri manuali per MT-4E
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1
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