ATLAS® 4500 Multimode Station Technical Manual .
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 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 55 MHz IF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8 Receiver DC Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8 135-175 MHz Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents (continued) iv ATLAS 4500 Multimode Station Technical Manual May 2017
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 May 2017
List of Tables Table 1.1 1.2 2.1 2.2 2.3 2.4 2.5 2.6 6.1 Page ATLAS 4500 Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 ATLAS 4500 Antennas / Antennes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Front Panel LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Tables (continued) Table viii Page ATLAS 4500 Multimode Station Technical Manual May 2017
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 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.
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.
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.
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.
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. NOTE The preceding warning list is not intended to include all hazards that may be encountered when using this repeater. Français ! CAUTION Ce répéteur émet des fréquences radio (RF) lors de la transmission.
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 Section 2 - Product Overview 700 / 800 MHz Table 2.3 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 negative ground 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.
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 May 2017
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 May 2017
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: 6.3 Step 1 In your browser, go to http://www.efjohnson.com/. Step 2 Click the Service & Support link.
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 VHF Circuit Descriptions Chapter 6 This chapter contains descriptions of the following VHF ATLAS 4500 internal components. For each of the following components, this chapter contains a general description and a schematic description: • • • • • • 135-175 MHz Exciter Module 135-175 MHz Receiver Module 135-175 MHz Power Amplifier Controller Board Audio Logic Board Power Supply A.
135-175 MHz Exciter Module Appendix A - VHF 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 a main RF board with associated frequency synthesizers, a modulation controller, filtering/ amp circuits, DPD loop section below the board and internal power supply circuits.
135-175 MHz Exciter Module Appendix A - VHF Circuit Descriptions Synthesizer IC24 and associated components provide a reference of 120.47 MHz for the error loop 2nd mixer LO amp IC21. This 120.45 MHz signal is frequency locked to the 10 MHz main reference clock. Synthesizer IC22 and associated components provide a reference of 40.32 MHz for the MCLK line to the A/D IC 31. This 40.32 MHz signal is frequency locked to the 43.2 MHz FPGA ADLMX line. A.1.2.
135-175 MHz Exciter Module Appendix A - VHF Circuit Descriptions A.1.2.4 RF Carrier Generation & Modulation RF carrier modulation type phase 1 FM or LSM and phase 2 H-DQPSK is generated within IC31 FPGA and IC32 DDS from a serial digital stream on the I2S bus lines coming from the external digital signal processor (DSP) and fed into pins 5, 7 and 8 of CN3. The initial setup for the FPGA internal Arm controller is done through the I2C bus on pins 9 and 12 of CN3.
135-175 MHz Exciter Module Appendix A - VHF Circuit Descriptions After a pad the 119.64 MHz IF is down-converted with the 120.45 MHz local signal from buffer amp IC21 by mixer M2 to result in an 810 KHz IF signal. The local oscillator for this second down converter is provided by the 120.45 MHz Synthesizer IC24 and associated components. Programming for this is provided by the FPGA IC32.
135-175 MHz Receiver Module Appendix A - VHF Circuit Descriptions IC30 and IC48 are linear regulators regulating the +5 V supply down to +3.3 V DC for the synthesizers. IC33 is a multi-circuit buck DC-DC converters and low drop out regulators that provide +3.3 V, +2.5 V, +1.8 V and +1.2 V for various circuit sections in the digital portion of the exciter including the FPGA, memory and DDS, etc. A.
135-175 MHz Receiver Module Appendix A - VHF Circuit Descriptions A.2.2 Schematic Description A.2.2.1 Frequency Synthesizer RF is output from the VCO board on SKU2-1 is applied to the fractional-N synthesiser IC6 main divider input. This signal is compared with the reference oscillator frequency and the correction voltage from the synthesiser’s charge pump output is filtered then amplified by the non-inverting low noise op amp IC10. This correction voltage is fed back to the VCO to maintain loop lock.
135-175 MHz Receiver Module Appendix A - VHF Circuit Descriptions A.2.2.3 Reference Clock A stable 10 MHz reference is generated by X1, a temperature controlled crystal oscillator (TCXO) and fed to the synthesiser IC6 through an amplifier consisting of TR2 and associated components. A.2.2.4 Front End The incoming signal from the antenna is connected to CN1 where it passes through a low pass filter then a limiter before amplification by IC2 (this can be linked out for higher dynamic range).
135-175 MHz Power Amplifier Appendix A - VHF Circuit Descriptions 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.3 135-175 MHz Power Amplifier This section contains information on the following Power Amplifier components: • • • • • • • • Attenuator Driver Module Output Power Amp Power Coupler Power Detector Harmonic Filter PTT Power Control Auxiliary Circuits A.3.
135-175 MHz Power Amplifier Appendix A - VHF Circuit Descriptions A.3.2 Schematic Description A.3.2.1 General The RF input is ~ 12dBm into CN1. The PA provides 1-100 W output across 135 – 175 MHz band at the main N type connector. The Main supply is 48 V at < 9 A at CN3. The secondary supply is 24 V 450 mA at CN2 and 5V at 10 mA at CN2. A.3.2.2 Attenuator CN1 at ~12 dBm enters a 4 dB pad and then the attenuator IC1 which provides attenuation steps of 0.25 dB from a 2 dB minimum.
Controller Board Appendix A - VHF Circuit Descriptions A.3.2.5 Power Coupler The PA feeds an output RF coupler port provides about ~4dBm at 100W output. This for the DPD use, it is fed back to the exciter. A.3.2.6 Power Detector Next the output RF passes a directional coupler. This is uses to sense PA forward and reflected power. The FWD VOLTS goes to CN – 11. REFL VOLTS goes to CN – 12. Detector sensitivity gives ~ 4.0 V at 100 W at the center of the band.
Controller Board Appendix A - VHF 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 - VHF 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 - VHF 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 - VHF 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 - VHF 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 - VHF 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 - VHF Circuit Descriptions ATLAS 4500 Multimode Station Technical Manual May 2017
