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MXDR/ATLAS 4500 BASE STATION VHF
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Table Of Contents
ATLAS® 4500 Multimode Station
Introduction
1.1 Using This Manual
1.1.1 Audience
1.1.2 Manual Organization
1.2 Safety Information
1.2.1 Safety Precautions
1.2.2 Hazardous Substances
1.2.3 Warnings and Cautions
1.3 Regulatory Information
1.3.1 FCC RF Warning Statement
1.3.2 FCC Part 15.19 Warning Statement
1.3.3 FCC Part 15.21 Warning Statement
1.3.4 FCC Part 15.105(b) Warning Statement
1.3.5 IC RSS-GEN, Sec 8.4 Warning Statement
1.3.6 IC RSS-GEN, Sec 8.3 Warning Statement
1.3.7 IC RSS-102, Sec 2.6 Warning Statements
Product Overview
2.1 Functional Description
2.1.1 Architecture
2.1.2 Usability and Maintainability
2.1.3 Design and Performance
2.2 Hardware Description
2.2.1 Block Diagram
2.2.2 Front Panel Indicator LEDs
2.2.3 Rear Panel Connectors
2.3 Software Description
2.4 Specifications
Installation and Configuration
3.1 Rack Installation
3.2 Connections
3.3 Initial Configuration
Alignment
Maintenance
5.1 Software Updates
Technical Support and Service
6.1 Contacting EFJohnson
6.1.1 Gather Information Before Calling EFJohnson
6.1.2 Contact Information
6.2 Product Warranty and Repair
6.2.1 Online Product Registration
6.3 Returns for Repairs
6.4 Replacement Parts
6.5 Internet Home Page
VHF Circuit Descriptions
A.1 135-175 MHz Exciter Module
A.1.1 General Description
A.1.2 Schematic Description
A.1.2.1 Frequency Synthesizers
A.1.2.2 TX VCO Board
A.1.2.3 Reference Clocks
A.1.2.4 RF Carrier Generation & Modulation
A.1.2.5 RF Filter Amp Section
A.1.2.6 DPD Loop
A.1.2.7 Exciter DC Supplies
A.2 135-175 MHz Receiver Module
A.2.1 General Description
A.2.2 Schematic Description
A.2.2.1 Frequency Synthesizer
A.2.2.2 RX VCO Board
A.2.2.3 Reference Clock
A.2.2.4 Front End
A.2.2.5 55 MHz IF Section
A.2.2.6 Receiver DC Supplies
A.3 135-175 MHz Power Amplifier
A.3.1 General Description
A.3.2 Schematic Description
A.3.2.1 General
A.3.2.2 Attenuator
A.3.2.3 Driver Module
A.3.2.4 Output Power Amp
A.3.2.5 Power Coupler
A.3.2.6 Power Detector
A.3.2.7 Harmonic Filter
A.3.2.8 PTT Power Control
A.3.2.9 Auxiliary Circuits
A.4 Controller Board
A.4.1 General Description
A.4.2 Schematic Description
A.4.2.1 PA Interface
A.4.2.2 Exciter Interface
A.4.2.3 RX Interface
A.4.2.4 DSP Interface
A.4.2.5 Fan Control
A.4.2.6 External Port and Serial Links
A.4.2.7 Auxiliary
A.4.2.8 Firmware
A.5 Audio Logic Board
A.5.1 General Description
A.5.2 Schematic Description
A.6 Power Supply
A.6.1 General Description
A.6.2 Schematic Description
A.6.2.1 Mains-to-48V PSU
A.6.2.2 Filters
A.6.2.3 Switch Mode DC-to-DC Convertors
A-18
ATLAS 4500 Multimode Station Technical Manual
May 2017
Power Supply
Appendix A - VHF Circuit Descriptions
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