E.F. Johnson Company ATLAS 4500 User manual

ATLAS®4500
Multimode Station
Technical Manual
.
May 2017

Copyright ©2016-2017 by EF Johnson Technologies, Inc.
The EFJohnson Technologies logo and StarGate are trademarks of EF Johnson Technologies, Inc. ATLAS
is a registered trademark of EFJohnson Technologies. All other company and/or product names used in this
manual are trademarks and/or registered trademarks of their respective manufacturers.
Information in this manual is subject to change without notice.
ATLAS 4500 Multimode Station Technical Manual
May 2017

ATLAS 4500 Multimode Station Technical Manual May 2017 i
Section 1 - Introduction 1-1
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual Organization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1-2
Hazardous Substances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Warnings and Cautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
FCC RF Warning Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1-3
FCC Part 15.19 Warning Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
FCC Part 15.21 Warning Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
FCC Part 15.105(b) Warning Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
IC RSS-GEN, Sec 8.4 Warning Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
IC RSS-GEN, Sec 8.3 Warning Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
IC RSS-102, Sec 2.6 Warning Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Section 2 - Product Overview 2-1
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Usability and Maintainability . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 2-2
Design and Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Hardware Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Front Panel Indicator LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Rear Panel Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Software Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Section 3 - Installation and Configuration 3-1
ATLAS 4500 Multimode Station Technical Manual
May 2017

ii ATLAS 4500 Multimode Station Technical Manual May 2017
Table of Contents (continued)
Rack Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Initial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Section 4 - Alignment 4-1
Section 5 - Maintenance 5-1
Software Updates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Section 6 - Technical Support and Service 6-1
Contacting EFJohnson . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Gather Information Before Calling EFJohnson. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Contact Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 6-1
Product Warranty and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Online Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Returns for Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Internet Home Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Appendix A - VHF Circuit Descriptions A-1
135-175 MHz Exciter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Schematic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Frequency Synthesizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
TX VCO Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Reference Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
RF Carrier Generation & Modulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
RF Filter Amp Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
DPD Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4
Exciter DC Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
135-175 MHz Receiver Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Schematic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
RX VCO Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

ATLAS 4500 Multimode Station Technical Manual May 2017 iii
Table of Contents (continued)
Front End. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
55 MHz IF Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Receiver DC Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
135-175 MHz Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Schematic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10
Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10
Driver Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Output Power Amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Power Coupler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Power Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Harmonic Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . A-11
PTT Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Auxiliary Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Controller Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Schematic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-12
PA Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . A-12
Exciter Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13
RX Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13
DSP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13
Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14
External Port and Serial Links. . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . A-14
Auxiliary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14
Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-15
Audio Logic Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-15
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
Schematic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
Schematic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Mains-to-48V PSU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
Switch Mode DC-to-DC Convertors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17

iv ATLAS 4500 Multimode Station Technical Manual May 2017
Table of Contents (continued)

ATLAS 4500 Multimode Station Technical Manual May 2017 v
List of Figures
Figure Page
2.1 ATLAS 4500 Introductory View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2 Block Diagram . . . .. . . . . . . . . .. . . . . . . .. . . . . . . . . .. . . . . . . .. . . . . . . . . .. . . . . . . 2-3
2.3 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2.4 Rear Panel and Connectors. . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . 2-5

vi ATLAS 4500 Multimode Station Technical Manual May 2017
List of Figures (continued)
Figure Page

ATLAS 4500 Multimode Station Technical Manual May 2017 vii
List of Tables
Table Page
1.1 ATLAS 4500 Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.2 ATLAS 4500 Antennas / Antennes . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . 1-7
2.1 Front Panel LEDs. . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. 2-4
2.2 Rear Panel Connectors . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . 2-6
2.3 General Specifications. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . 2-7
2.4 Transmitter Specifications . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . . . .. . . 2-7
2.5 Receiver Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2.6 Standards Compliance. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . 2-8
6.1 Customer Service Contact Information . . . . . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . 6-2

viii ATLAS 4500 Multimode Station Technical Manual May 2017
List of Tables (continued)
Table Page

ATLAS 4500 Multimode Station Technical Manual May 2017 1-1
SECTION
Introduction
This section contains information on the following topics:
• Using This Manual
• Safety Information
• Regulatory Information
1.1 Using This Manual
This manual is the core document for information on ATLAS® 4500 Multimode
Station installation, new configuration, administration, and maintenance.
1.1.1 Audience
This manual is intended for technical support personnel, system and network
administrators, who install, configure, and maintain the ATLAS 4500.
1.1.2 Manual Organization
This product manual will help you configure and use the ATLAS 4500. This
manual is organized into sections to assist you in locating information quickly and
efficiently. It contains the following sections:
• Product Overview
• Installation and Configuration
• Alignment
• Maintenance

1-2 ATLAS 4500 Multimode Station Technical Manual May 2017
Safety Information Section 1 - Introduction
• Technical Support and Service
1.2 Safety Information
1.2.1 Safety Precautions
These safety precautions, warnings and cautions advise personnel of specific
hazards that may be encountered during the procedures contained in this document.
Control measures are required to prevent injury to personnel, and damage to
equipment and the operating environment.
Before beginning the installation or any maintenance of this equipment, personnel
are to acquaint themselves with all risk assessments relevant to the work site and
the task. They must then comply with the control measures detailed in those risk
assessments.
References covering safety regulations, health hazards and hazardous substances
are detailed under the following WARNINGS section. These are referred to in the
tasks, when encountered.
Adequate precautions must be taken to ensure that other personnel do not activate
any equipment that has been switched off for maintenance.
1.2.2 Hazardous Substances
Before using any hazardous substance or material, the user must be conversant with
the safety precautions and first aid instructions:
• On the label of the container in which it was supplied.
• On the material Safety Data Sheet.
• In any local Safety Orders and Regulations.

ATLAS 4500 Multimode Station Technical Manual May 2017 1-3
Regulatory Information Section 1 - Introduction
1.2.3 Warnings and Cautions
Observe all warnings and cautions when working on or around this equipment.
1.3 Regulatory Information
This section contains the following statements:
• FCC RF Warning Statement
• FCC Part 15.19 Warning Statement
• FCC Part 15.21 Warning Statement
• FCC Part 15.105(b) Warning Statement
• IC RSS-GEN, Sec 8.4 Warning Statement
• IC RSS-GEN, Sec 8.3 Warning Statement
• IC RSS-102, Sec 2.6 Warning Statements
1.3.1 FCC RF Warning Statement
WARNING
!
•Radio frequency radiation. A radio frequency (rf) radiation hazard exists in this equipment. To
avoid rf injury, do not touch the antenna when the transmitter is in use. Do not operate transmitter
with antenna disconnected.
•Thermal or RF burns. Do not attempt internal servicing while transmitting. Thermal or RF burns
may result from touching certain components within the power amplifier module while transmitting
or operating the transmitter.
•Shock Hazard. To minimize any possible shock hazard from an external power supply or lightning
strike, the chassis of the equipment cabinet must to be connected to an electrical safety earth
connection.
•Do not operate in an explosive atmosphere. Do not operate this equipment in the presence of
flammable gases or fumes. operation of any electrical equipment in such an environment
constitutes a definite safety hazard.
•Do not substitute parts or modify the equipment. Due to the danger of introducing additional
hazards, do not install substitute or lower voltage parts to theequipment. Return to your authorized
distributor.
•Beryllium and beryllia. Most rf power transistors and some rf power hybrids contain beryllium
oxide. Refer to the appropriate safety data sheet and/or consult your local authority for correct
disposal thereof.
CAUTION
!
Electrostatic Discharge Sensitive Devices (ESDS Devices). Observe the appropriate
precautions and procedures when working on, or in the vicinity of, this equipment to avoid
personal injury and/or damage to the equipment
CAUTION
!
This repeater emits radio frequency (RF) energy when transmitting. Make sure to observe all RF
energy exposure standards when installing, testing, repairing, and operating this radio equipment.

1-4 ATLAS 4500 Multimode Station Technical Manual May 2017
Regulatory Information Section 1 - Introduction
Proper operation of this repeater under normal conditions results in user exposure
to RF energy below standard acceptable limits.
• Do not allow the antenna to touch or come in very close proximity with the eyes,
face, or any exposed body parts while the repeater is transmitting.
• Do not operate the transmitter of a stationary radio (base station or marine radio)
when a person is within 17.7 feet (5.4 meters) of the antenna.
• Do not operate the repeater in explosive or flammable atmospheres. The
transmitted repeater energy could trigger blasting caps or cause an explosion.
• Do not operate the repeater without the proper antenna installed.
• Do not allow children to operate transmitter equipped repeater equipment.
1.3.2 FCC Part 15.19 Warning Statement
This device complies with Part 15 of the FCC rules. Operation is subject to the
following two conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that
may cause undesired operation.
1.3.3 FCC Part 15.21 Warning Statement
The grantee is not responsible for any changes or modifications not expressly
approved by the party responsible for compliance. Such modifications could void
the user’s authority to operate the equipment.
1.3.4 FCC Part 15.105(b) Warning Statement
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
NOTE
The preceding warning list is not intended to include all hazards that may be encountered when
using this repeater.

ATLAS 4500 Multimode Station Technical Manual May 2017 1-5
Regulatory Information Section 1 - Introduction
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
• Do not operate the transmitter of a stationary radio (base station or marine radio)
when a person is within 17.7 feet (5.4 meters) of the antenna.
• The ATLAS 4500 has been approved to operate with the antenna types listed in
Table 1.1 with the maximum permissible gain and required antenna impedance
for each antenna type indicated. Antenna types not included in this list, having a
gain greater than the maximum gain indicated for that type, are strictly
prohibited for use with this device.
Table 1.1 ATLAS 4500 Antennas
Antenna Manufacturer
and Model Number
Maximum Permissible
Antenna Gain
[dBd] Required Impedance
[]
Sinclair SINC SC281-HF3LDF(D00) 5 50
Sinclair SC233-SFXSNM 3
Sinclair SC226-SFXLDF 6
Sinclair SC225-SF3SNM 0
Telewave ANT150F2DIN 2.5
Telewave ANT150F6-3DIN 6

1-6 ATLAS 4500 Multimode Station Technical Manual May 2017
Regulatory Information Section 1 - Introduction
1.3.5 IC RSS-GEN, Sec 8.4 Warning Statement
English
This device complies with Industry Canada license-exempt RSS standard.
Operation is subject to the following two conditions:
• This device may not cause interference.
• This device must accept any interference, including interference that may cause
undesired operation of the device.
Français
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux
appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions
suivantes:
• L'appareil ne doit pas produire de brouillage.
• L'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même
si le brouillage est susceptible d'en compromettre le fonctionnement.

ATLAS 4500 Multimode Station Technical Manual May 2017 1-7
Regulatory Information Section 1 - Introduction
1.3.6 IC RSS-GEN, Sec 8.3 Warning Statement
English
The ATLAS 4500 has been approved by Industry Canada to operate with the
antenna types listed in Table 1.2 with the maximum permissible gain and required
antenna impedance for each antenna type indicated. Antenna types not included in
this list, having a gain greater than the maximum gain indicated for that type, are
strictly prohibited for use with this device.
Français
Le ATLAS 4500 a été approuvé par Industrie Canada pour fonctionner avec les
types d'antenne énumérés en Table 1.2 et ayant un gain admissible maximal et
l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus
dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont
strictement interdits pour l'exploitation de cet émetteur.
1.3.7 IC RSS-102, Sec 2.6 Warning Statements
English
Proper operation of this repeater under normal conditions results in user exposure
to RF energy below standard acceptable limits.
• Do not allow the antenna to touch or come in very close proximity with the eyes,
face, or any exposed body parts while the repeater is transmitting.
• Do not operate the transmitter of a stationary radio (base station or marine radio)
when a person is within 22.1 feet (6.72 meters) of the antenna.
• Do not operate the repeater in explosive or flammable atmospheres. The
transmitted repeater energy could trigger blasting caps or cause an explosion.
Table 1.2 ATLAS 4500 Antennas / Antennes
Antenna Manufacturer
and Model Number
Antenne Fabricant et numéro de
modèle
Maximum Permissible
Antenna Gain
Maximum admissible Gain
d'antenne
[dBd]
Required Impedance
Impédance requise
[]
Sinclair SINC SC281-HF3LDF(D00) 5 50
Sinclair SC233-SFXSNM 3
Sinclair SC226-SFXLDF 6
Sinclair SC225-SF3SNM 0
Telewave ANT150F2DIN 2.5
Telewave ANT150F6-3DIN 6
CAUTION
!
This repeater emits radio frequency (RF) energy when transmitting. Make sure to observe all RF
energy exposure standards when installing, testing, repairing, and operating this radio equipment.

1-8 ATLAS 4500 Multimode Station Technical Manual May 2017
Regulatory Information Section 1 - Introduction
• Do not operate the repeater without the proper antenna installed.
• Do not allow children to operate transmitter equipped repeater equipment.
Français
Le bon fonctionnement de ce répéteur dans des conditions normales entraîne
l'exposition de l'utilisateur à l'énergie RF en dessous des limites du standard
acceptables.
• Ne pas laisser l'antenne entrer en contact ou à proximité des yeux, du visage ou
des parties du corps exposées lorsque le répéteur transmet.
• Ne pas faire fonctionner l'émetteur d'une radio fixe (station de base ou radio
marine) quand une personne est dans les 22.1 pieds (6.71 mètres) de l'antenne.
• Ne pas faire fonctionner le répéteur dans des atmosphères explosives ou
inflammables. L'énergie du répéteur qui transmet pourrait déclencher des
détonations ou provoquer une explosion.
• Ne pas faire fonctionner le répéteur sans l'antenne appropriée installée.
•Ne pas laisser les enfants utiliser l'émetteur équipé du matériel de répéteur.
NOTE
The preceding warning list is not intended to include all hazards that may be encountered when
using this repeater.
CAUTION
!
Ce répéteur émet des fréquences radio (RF) lors de la transmission. Assurez-vous de respecter
toutes les normes d' exposition à l'énergie RF lors de l'installation, les essais, la réparation et
l'utilisation de ce matériel radio.
NOTE
La liste d’avertissement précédente ne vise pas à inclure tous les dangers qui peuvent survenir
lorsque vous utilisez ce répéteur.

ATLAS 4500 Multimode Station Technical Manual May 2017 2-1
SECTION
Product Overview
This chapter contains the following sections:
• Functional Description
• Hardware Description
• Software Description
• Specifications
2.1 Functional Description
The ATLAS 4500 (Figure 2.1) is a fully software-definable IP-based linear base
station that operates in P25 Phase 1 and P25 Phase 2. It has both analog and P25
mixed-mode capabilities. It is available in a range of frequency bands including
VHF, UHF, and 700/800 MHz.

2-2 ATLAS 4500 Multimode Station Technical Manual May 2017
Functional Description Section 2 - Product Overview
Figure 2.1 ATLAS 4500 Introductory View
2.1.1 Architecture
• Leverages a common hardware platform to support the following:
- 12.5 kHz, 20 kHz, and 25 kHz Analog
- 12.5kHz FDMA P25 Phase I
- 6.25 kHz P25 Phase 2 TDMA
• Operates in the following modes:
- Analog/P25 Conventional
- P25 Trunked
- Simulcast
• Smallest P25 Phase 2 base station in the industry packaged in an ultra-compact
2RU size chassis maximizing rack space usage
• AC or DC power input
- AC power input can be 90-264 VAC
- DC power input can be 24-58 VDC
2.1.2 Usability and Maintainability
• Modular architecture allows flexible expansion of sites and seamless scalability
of the system.
• Interactive front panel design displays status and diagnostics for rapid
troubleshooting.
• Flexible software upgrades
2.1.3 Design and Performance
• Improved multi-band receiver design provides higher sensitivity along with very
high intermodulation immunity for congested prime site locations.