ATLAS® 4500 Multimode Station Technical Manual .
Copyright © 2016-2021 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 July 2021 Section 1 - Introduction 1-1 Using This Manual ............................................................................................................................. 1-1 Audience .................................................................................................................................... 1-1 Manual Organization ..............................................................................................................
Table of Contents (continued) Rack Installation ................................................................................................................................ 3-1 Connections ....................................................................................................................................... 3-1 Initial Configuration ...........................................................................................................................
Table of Contents (continued) Front End ......................................................................................................................... A-8 90 MHz IF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8 Receiver DC Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9 760-870 MHz Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents (continued) iv ATLAS 4500 Multimode Station Technical Manual July 2021
List of Figures Figure 2.1 2.2 2.3 2.4 Page ATLAS 4500 Introductory View........................................................................................ 2-2 Block Diagram ................................................................................................................. 2-3 Front Panel ...................................................................................................................... 2-4 Rear Panel and Connectors ...................................................
List of Figures (continued) Figure vi Page ATLAS 4500 Multimode Station Technical Manual July 2021
List of Tables Table 1.1 2.1 2.2 2.3 2.4 2.5 2.6 6.1 Page ATLAS 4500 Antennas / Antennes .................................................................................. 1-5 Front Panel LEDs ............................................................................................................ 2-4 Rear Panel Connectors ................................................................................................... 2-6 General Specifications.......................................................
List of Tables (continued) Table viii Page ATLAS 4500 Multimode Station Technical Manual July 2021
S ECTION 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.
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.
Regulatory Information Section 1 - Introduction 1.2.3 Warnings and Cautions Observe all warnings and cautions when working on or around this equipment. ! WARNING ! CAUTION 1.3 • 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.
Regulatory Information Section 1 - Introduction 1.3.2 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. 1.3.3 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.
Regulatory Information Section 1 - Introduction 1.3.5 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 1.1 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.
Regulatory Information Section 1 - Introduction 1.3.6 IC RSS-102, Sec 2.6 Warning Statements English ! 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. Proper operation of this repeater under normal conditions results in user exposure to RF energy below standard acceptable limits.
S ECTION 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.
Functional Description Section 2 - Product Overview Figure 2.1 2.1.1 ATLAS 4500 Introductory View 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.
Hardware Description Section 2 - Product Overview • High-power ultra linear ultra compact RF power amplifier uses digital and RF techniques and components that greatly simplify operation • Full-spectrum coverage in VHF, UHF, and 700/800 MHz 2.2 Hardware Description This section contains information on the following topics: • Block Diagram • Front Panel Indicator LEDs • Rear Panel Connectors 2.2.1 Block Diagram The block diagram in Figure 2.
Hardware Description Section 2 - Product Overview 2.2.2 Front Panel Indicator LEDs Figure 2.3 shows the ATLAS 4500 front panel. Table 2.1 contains descriptions of the front panel indicator LEDs. Front Panel Figure 2.3 ANALOG POWER P25 PHASE 1 P25 PHASE 2 Rx A Tx A Rx B Tx B LINK Table 2.
Hardware Description Section 2 - Product Overview 2.2.3 Rear Panel Connectors Figure 2.4 shows the ATLAS 4500 rear panel and its connectors. Table 2.2 contains descriptions of the connectors. Figure 2.
Software Description Table 2.2 Section 2 - Product Overview Rear Panel Connectors Connector Type Function Primary Audio RJ 45 socket, 8 pin Primary 4-Wire/4-Wire E&M Connection. Used to transmit over 4-wire or receive over 4-Wire from the receiver Secondary Audio RJ 45 socket, 8 pin Not used (Secondary 4-Wire/4-Wire E&M Connection. Designed to receive audio over 4-wire from optional Receiver 2.
Specifications Table 2.3 Section 2 - Product Overview General Specifications Parameter Values Mounting 19” rack or shelf Dimensions (Height x Width x Depth) 3.5" x 19" x 17.9" (89 x 483 x 455mm) Weight 24.25 pounds (11 kg) Operating Temperature Range -22°F to +140°F (-30°C to +60°C) Power Requirements AC: 90-264 VAC, 47-63 Hz or DC: 24-58 VDC positive or negativeground Power Consumption 100 W Tx 430 W Rx 28 W RF Interconnects Tx: N Female Rx: N Female Channel Spacing 12.
Specifications Table 2.4 Section 2 - Product Overview Transmitter Specifications (continued) Parameter VHF UHF 700 / 800 MHz Analog FM Hum & Noise (S/N Ratio) 45 dB Maximum Deviation (Analog) ± 2.5 kHz ± 2.5 kHz ± 5 kHz Maximum Deviation (Digital) ± 3110 Hz ± 3110 Hz ± 3110 Hz Table 2.
Specifications ATLAS 4500 Multimode Station Technical Manual July 2021 Section 2 - Product Overview 2-9
Specifications 2-10 Section 2 - Product Overview ATLAS 4500 Multimode Station Technical Manual July 2021
S ECTION Installation and Configuration This chapter contains the following sections: • Rack Installation • Connections • Initial Configuration 3.1 Rack Installation EFJohnson performs all rack installation before delivering the ATLAS 4500 to the customer. Refer to Section 6 for information on obtaining technical support and service. 3.2 Connections EFJohnson makes all ATLAS 4500 cable connections for the customer. Refer to Section 6 for information on obtaining technical support and service. 3.
Initial Configuration Section 3 - Installation and Configuration Administrators use the ATLAS 6100/6200 Network Management System (NMS) to configure and maintain the ATLAS 4500. Refer to the ATLAS 6100/6200 Network Management System (NMS) Technical Manual.
S ECTION Alignment The ATLAS 4500 does not require alignment. Refer to Section 6 for information on obtaining technical support and service.
Section 4 - Alignment 4-2 ATLAS 4500 Multimode Station Technical Manual July 2021
S ECTION Maintenance The ATLAS 4500 contains no parts that the customer may maintain. Refer to Section 6 for information on obtaining technical support and service. 5.1 Software Updates Administrators use the ATLAS 6100/6200 Network Management System (NMS) to perform software updates for the ATLAS 4500. Refer to the ATLAS 6100/6200 Network Management System (NMS) Technical Manual.
Software Updates 5-2 Section 5 - Maintenance ATLAS 4500 Multimode Station Technical Manual July 2021
S ECTION Technical Support and Service EFJohnson technical personnel are available to provide both onsite and online service, in accordance with the existing support agreement. 6.1 Contacting EFJohnson If EFJohnson Technologies technical personnel are not on site, and are needed for installation assistance, contact the EFJohnson Technologies representative for your site. Check with your site engineer or site manager for contact information. 6.1.
Product Warranty and Repair Section 6 - Technical Support and Service Table 6.1 Customer Service Contact Information Method (800) 328-3911 (all except Multi-Net) Extensions: Toll-Free Phone: • • • • Option #1: Orders and Parts Option #3: Technical Support Option #4: Repair Depot Option #5: Warranty, Support, Questions (800) 295-1773 (Multi-Net only) NOTE Fax: (972) 819-0851 Email: techsupport@efji.
Returns for Repairs Section 6 - Technical Support and Service 6.2.1 Online Product Registration EFJohnson offers greater convenience through online product warranty registration. Registering EFJohnson products online allows customers to receive warranty service and field service notices more quickly. To register EFJohnson Technologies products online and ensure the covered warranty: Step 1 In your browser, go to http://www.efjohnson.com/. Step 2 Click the Service & Support link. 6.
Internet Home Page 6.5 Section 6 - Technical Support and Service Internet Home Page EFJohnson Technologies has an Internet site that can be accessed for information on the company about such things as products, systems, and regulations. The address is http://www.efjohnson.
Appendix 700/800 MHz Circuit Descriptions This chapter contains descriptions of the following 700/800 MHz ATLAS 4500 internal components. For each of the following components, this chapter contains a general description and a schematic description: • • • • • • 767-870 MHz Exciter Module 792-825 MHz Receiver Module 760-870 MHz Power Amplifier Controller Board Audio Logic Board Power Supply A.
767-870 MHz Exciter Module Appendix A - 700/800 MHz Circuit Descriptions A.1.1 General Description The Exciter module generates the low level RF transmitter signal that is amplified to nominal output power level by the Power Amplifier. The exciter module consists of two circuit boards. A Voltage Controlled Oscillator (VCO) board and an RF board with associated frequency synthesizers, a modulation controller, filtering circuits and internal power supply circuits.
767-870 MHz Exciter Module Appendix A - 700/800 MHz Circuit Descriptions Synthesizer IC28 and associated components provide a reference of 345.6 MHz for IC31 DDS IC. This 345.6 MHz signal is frequency locked to the 10 MHz main reference clock. The 345.6 MHz clock is divided by 8 within IC31 and outputs a 43.2 MHz clock that drives IC32 FPGA. Synthesizer IC24 and associated components provide a reference of 120.45 MHz for the error loop second mixer LO amp IC21. This 120.
767-870 MHz Exciter Module Appendix A - 700/800 MHz Circuit Descriptions Buffer transistors TR2 and TR3 provide a fast slew rate clock REF IN for better phase noise. This feeds a digital buffer IC 29 generating a fast edge 10MHz clock for the 345.6 MHz and 120.47 MHz synthesizers. NOTE An external 10 MHz clock must have low phase noise/jitter and have a nominal level of 10 dBm (1.
767-870 MHz Exciter Module Appendix A - 700/800 MHz Circuit Descriptions A.1.2.6 DPD Loop The modulator includes a Digital Pre Distortion (DPD) feedback system that corrects for distortion in the PA and allows for small adjustments to be made to the modulated RF signal output. This enables excellent overall linearity and good close in ACP performance for the transmitter. The feedback signal from the Power Amplifier sample port comes into the exciter module through CN6 at ~ 6 dBm.
792-825 MHz Receiver Module Appendix A - 700/800 MHz Circuit Descriptions A.1.2.7 Exciter DC Supplies The exciter is supplied a nominal 13.8 V through CN3-2. This input supply is then distributed to IC1, IC4, IC9 and IC11. IC1 is configured as a 1 MHz buck DC-DC converter and provides the main regulated +5.2 VDC output. A shielded inductor is used to reduce fields. IC9 is configured as a boost DC-DC converter and provides +25 V DC output for the main PLL. IC3 is a linear regulator regulating the +5.
792-825 MHz Receiver Module Appendix A - 700/800 MHz Circuit Descriptions The receiver module consists of two circuit boards. A Voltage Controlled Oscillator (VCO) board and an RX board with associated frequency synthesizers, down converter, TCXO, filtering circuits and internal power supply circuits. Receiver input frequency programming is achieved by using serial data connections to an external controller.
792-825 MHz Receiver Module Appendix A - 700/800 MHz Circuit Descriptions Each band is switched under control of the Controller. 2 MMIC buffers feed the synthesizer and main outputs. The power supply to the VCO consists of an 8-V regulator and active filter for maximum noise rejection located on the exciter PCB. The 8-V supply consists of IC11, TR6 and associated components. The PLL control line varies VCO frequency (SKT – 1). A.2.2.
760-870 MHz Power Amplifier Appendix A - 700/800 MHz Circuit Descriptions A.2.2.6 Receiver DC Supplies The exciter is supplied nominal 13.8 V through SK1-2. This input supply is then distributed to IC1 and IC4. IC1 is configured as a buck DC-DC converter and provides a regulated +5.2 VDC output. IC4 is configured as a boost DC-DC converter and provides +25 V DC output. IC3 regulates +5.2 V supply down to +5 VDC. IC48 regulates +5 V supply down to +3.3 VDC. A.
760-870 MHz Power Amplifier Appendix A - 700/800 MHz Circuit Descriptions A.3.2 Schematic Description A.3.2.1 General The RF from the Exciter passes via a coaxial cable to the input of the PA Module, CN1 at ≥12 dBm enters attenuator IC1, this provides attenuation steps of 0.25 dB. This is used by the main Controller PCB for power control via CN2 pins 3, 4, 5 lines. The control lines are protected from ESD and RF. The RF signal then enters a Driver Module.
760-870 MHz Power Amplifier A.3.2.2 Attenuator Appendix A - 700/800 MHz Circuit Descriptions CN1 at ~12 dBm enters attenuator IC1. This provides attenuation steps of 0.25 dB from a 2 dB minimum. This is used by the Controller for power control through CN2 pins 3, 4, 5 lines. NOTE The Controller uses the PA calibration data stored in IC11 during PA calibration, FWD VOLTS from the power detector, TX frequency and O/P power settings set from the DSP to control the attenuator values dynamically. A.3.2.
Controller Board Appendix A - 700/800 MHz Circuit Descriptions A.3.2.5 Power Coupler The PA feeds an output RF coupler port, providing about 6 dBm at 100 W output. This is for DPD use, and is fed to the Exciter. A.3.2.6 Power Detector Next, the output RF passes a directional coupler. This is used to sense PA forward and reflected power. The FWD VOLTS goes to CN – 11. REFL VOLTS goes to CN – 12. Detector sensitivity gives ~ 3.5 V at 100 W at center of the band.
Controller Board Appendix A - 700/800 MHz Circuit Descriptions • • • • • • RX Interface DSP Interface Fan Control External Port and Serial Links Auxiliary Firmware A.4.1 General Description The Controller PCB contains the following: • • • • • • • • • • • • • • The main microcontroller IC1 containing CPU, flash, RAM, UARTs, ports etc Data latches Serial Flash 3.
Controller Board Appendix A - 700/800 MHz Circuit Descriptions A.4.2.2 Exciter Interface The Exciter interface has 30 pins. The Exciter interface provides ~13.8 V at ~0.6 A. The interface includes: • Synth – 4 x Lines are provided for 4 VCO controls, 3 x synth frequency setting lines, lock alarm. • I2C bus for exciter serial flash and FPGA ARM communication from the Controller • TXVCO volts monitor line.
Controller Board Appendix A - 700/800 MHz Circuit Descriptions The DSP TX modulation data is sent synchronously through the I2SCLK, I2SDAT, ISFRM lines to the Exciter FPGA. The FPGA controls the clock and frame timing of this interface, where DSP provides raw data. A 1pps signal from the DSP can be provided for precise simulcast timing. The DSP RX IF comes from the RX to DSP.
Audio Logic Board Appendix A - 700/800 MHz Circuit Descriptions The Controller sends serial data on 3 lines to the PA 7 bit attenuator ATN1, ATN2, ATN3 for SI, CLK, LE pins on the attenuator IC. The Controller has an input port for the temperature sensor sending a pulse width modulated signal. A.4.2.8 Firmware The Controller flash contains following: • Gateway operational software to obey command protocol from the DSP. DSP sends commands to set up RF characteristics, modulation etc.
Power Supply Appendix A - 700/800 MHz Circuit Descriptions A.5.2 Schematic Description The OMAP operates all external interfaces and the three serial communication devices. It also interfaces with the Controller board through a MCBSP BUS and UART. A.6 Power Supply This section contains information on the following Power Supply components: • Mains-to-48V PSU • Filters • Switch Mode DC-to-DC Convertors A.6.
Power Supply Appendix A - 700/800 MHz Circuit Descriptions The 3 DC to DC convertors outputs have filter networks to filter RFI noise. A.6.2.3 Switch Mode DC-to-DC Convertors The 48V supply is DC / DC converted to 5 V by IC2, 13.8 V by IC1 and 24 V by IC3. Each supply capacity is ~ 1.5 A and is fold-back protected.
Power Supply A-18 Appendix A - 700/800 MHz Circuit Descriptions ATLAS 4500 Multimode Station Technical Manual July 2021
