Ericsson 1/KRB 101 1108 Installation, Operation And Maintenance Instructions

ERICSSON AMPLIFIER TECHNOLOGIES INC.

49 Wireless Boulevard

Hauppauge, New York 11788

(631) 357-8200

MULTI-CARRIER

POWER AMPLIFIER

MCPA

Product Number 1/KRB 101 1108

INSTALLATION, OPERATION AND

MAINTENANCE INSTRUCTIONS

Ericsson Amplifier Technologies Inc.

Technical Publication MCPA

Revision A

PREPARED

May 23, 2001

NOTICE

PROPRIETARY AND PRIVATE

The information contained in this document is the property of Ericsson Amplifier Technologies Inc., (Company) and shall be kept in strict confidence. Except with the written permission of the Company, such information shall not be published, or disclosed to others, or used for manufacture or sale or for any other purpose. This document shall not be duplicated in whole or in part. Any recipient so agrees by acceptance of this document.

The following symbols are used throughout this technical manual:

WARNING

THIS SYMBOL INDICATES IMPORTANT INFORMATION THAT IS EMPHASIZED TO ALERT THE READER TO THE POTENTIAL RISK OF PERSONAL INJURY TO THE OPERATOR OR OTHER PERSONNEL.

CAUTION

This symbol indicates important information that is emphasized to alert

the reader to the potential risk of damage to the amplifier.

NOTE

This symbol indicates information that is highlighted signifying an operation or procedural step requiring additional emphasis.

Ericsson Amplifier Technologies Incorporated provides this technical manual “as is” without warranty of any kind, either expressed or implied. Ericsson Amplifier Technologies may make improvements or changes to the product and/or manual at any time without notice.

Every effort has been made to ensure the accuracy and completeness of this technical manual, however, it may contain technical inaccuracies or typographical errors. Changes are made periodically to the information contained herein. These changes will be incorporated into new editions of this technical manual.

Ericsson Amplifier Technologies is interested in receiving comments from the users of this manual in order to improve its usefulness. All comments should be directed via regular mail to the address listed on the title page of this document. Ericsson Amplifier Technologies may use or distribute any of the information supplied in any way it believes appropriate, without incurring any obligations.

All specifications are subject to change without notice.

WARNING THE USE OF AN EARTH GROUND IS REQUIRED TO ENSURE SAFETY.

IF THE EQUIPMENT APPEARS TO BE DAMAGED IN ANY WAY, REMOVE ALL POWER TO THE UNIT, AND HAVE IT SERVICED AS SOON AS POSSIBLE.

RETURN FOR REPAIR

FIELD OPERATION SUMMARY SHEET

Please make a copy of this sheet, and complete the following questionnaire. If necessary, attach additional sheets. This information will assist in expediting repairs to the equipment, and is used for fault trend analyses and ongoing product improvement.

FIELD TECH NAME:_______________________________ DATE: _____________________________ EQUIPMENT LOCATION (CELL SITE NUMBER): ___________________________________________

____________________________________________________________________________________ MODEL NUMBER: ____________________________________________________________________ SERIAL NUMBER: ____________________________________________________________________ FREQUENCY OF OPERATION: A:__________________________ B: _________________________ CARRIER POWER:____________________________________________________________________ MAXIMUM NUMBER OF CARRIERS: _____________________________________________________ LED INDICATOR STATUS:

LED DESCRIPTION LED ON

Check þ

LED OFF

Check þ

DC ON:

o o

ENABLE:

o o

FAN ALARM:

o o

LOOP ALARM:

o o

VSWR ALARM:

o o

POWER SUPPLY ALARM:

o o

TEMPERATURE ALARM:

o o

OVER POWER ALARM:

o o

UNIT SURFACE TEMPERATURE: _______________________________________________________ POWER SUPPLY MODEL OR CAPABILITY: _______________________________________________

____________________________________________________________________________________ OTHER DETAILS OF PROBLEM REPORTED:______________________________________________

____________________________________________________________________________________

Table of Contents

1. GENERAL DESCRIPTION.....................................................................................1

1.1 Introduction .............................................................................................................................1

1.2 Related Publications ...............................................................................................................1

1.3 General Description.................................................................................................................1

1.4 Equipment Functional and Physical Specifications..............................................................2

1.5 Mechanical Description ...........................................................................................................3

2. INSTALLATION .....................................................................................................4

2.1 Introduction .............................................................................................................................4

2.2 Electrical Service Recommendations .....................................................................................4

2.3 Receiving, Unpacking and Inspection....................................................................................4

2.4 Repackaging for Shipment .....................................................................................................4

2.5 Environmental Limitations ......................................................................................................5

2.6 Installation ...............................................................................................................................5

2.6.1 Recommended Tools..........................................................................................................5

2.6.2 Blind Mate Configuration Mounting.....................................................................................5

2.7 Cable Interconnections...........................................................................................................7

2.8 Verify Connections..................................................................................................................8

2.9 Verify DC Supply Voltage ........................................................................................................8

3. OPERATING INSTRUCTIONS...............................................................................9

3.1 Safety Precautions ..................................................................................................................9

3.2 Controls and Indicators ........................................................................................................10

3.2.1 Local Controls and Indicators............................................................................................10

3.2.2 MCPA Power ON/OFF Sequence Summary.....................................................................13

3.2.3 Remote Control/Status Interface.......................................................................................15

3.3 Initial Turn On Procedure......................................................................................................15

3.4 Normal Operation ..................................................................................................................16

3.5 Shut Down Procedure...........................................................................................................16

4. PRINCIPLES OF OPERATION............................................................................17

4.1 Introduction ...........................................................................................................................17

4.2 RF Input Signal......................................................................................................................17

4.3 RF Output Load.....................................................................................................................17

4.4 System Functional Description ............................................................................................17

4.4.1 Main Amplifier ..................................................................................................................19

4.4.2 Error Amplifier ..................................................................................................................19

4.4.3 Amplitude and Phase Adjustment .....................................................................................19

4.4.4 Amplifier Module Cooling..................................................................................................20

4.5 Power Distribution.................................................................................................................20

4.6 Intermodulation Distortion Performance .............................................................................20

4.6.1 Intermodulation Distortion.................................................................................................20

4.7 Description of Operating Modes...........................................................................................20

4.7.1 Default mode ...................................................................................................................20

4.7.2 Standby Mode: ................................................................................................................21

4.7.3 DC On Mode ....................................................................................................................21

4.7.4 Enable Mode....................................................................................................................21

4.7.5 Shutdown Mode..............................................................................................................21

4.7.6 ALC Mode........................................................................................................................21

4.7.7 Locking Mode..................................................................................................................22

4.8 Description of Alarm Conditions..........................................................................................22

4.8.1 LOOP Alarm.....................................................................................................................22

4.8.2 VSWR Alarm....................................................................................................................22

4.8.3 TEMP/WARN Alarm.........................................................................................................22

4.8.4 PWR SPLY Alarm ............................................................................................................23

4.8.5 FAN Alarm........................................................................................................................23

4.8.6 OVER PWR Alarm ...........................................................................................................23

5. MAINTENANCE ...................................................................................................25

5.1 Introduction ...........................................................................................................................25

5.2 Periodic Maintenance............................................................................................................25

5.2.1 Cleaning Air Inlets/Outlets ................................................................................................26

5.2.2 Test Equipment Required .................................................................................................26

5.2.3 Performance Tests ...........................................................................................................26

5.3 Troubleshooting Procedures ................................................................................................27

5.4 Fan Assembly Replacement Procedure ...............................................................................27

List of Figures

Figure 1. Ericsson Amplifier Technologies Inc. Multi-Carrier Power Amplifier.....................2

Figure 2. Outline/Installation Drawing, Ericsson Amplifier Technologies MCPA .................6

Figure 3. MCPA Local Controls and Indicators.....................................................................11

Figure 4. MCPA Power ON/OFF Sequence............................................................................14

Figure 5. Block Diagram, MCPA Power Amplifier.................................................................24

Figure 6. MCPA Troubleshooting Flow Chart ......................................................................28

List of Tables

Table 1. Performance Characteristics, MCPA Power Amplifier.............................................3

Table 2. J1 – Blind Mate 24W7 D Sub-miniature Connector..................................................7

Table 3. MCPA Local Controls and Indicators......................................................................12

Table 4. Periodic Maintenance Tasks....................................................................................25

Table 5. Test Equipment Required........................................................................................ 26

1. GENERAL DESCRIPTION

1.1 Introduction

This manual provides information for the installation, operation and maintenance of Ericsson Amplifier Technologies MCPA multi-carrier power amplifier.

The manual is organized in 6 sections as follows:

• Section 1. General Description

• Section 2. Installation

• Section 3. Operating Instructions

• Section 4. Principles of Operation

• Section 5. Maintenance

• Section 6. Photographs

1.2 Related Publications

TMHPC8689-400 - ERICSSON AMPLIFIER TECHNOLOGIES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS FOR SUBRACK ASSEMBLY

1.3 General Description

The MCPA (Figure 1) is a microprocessor controlled, linear multi-carrier power amplifier (MCPA), which operates over the frequency range of 869 to 894 MHz with a rated output power of 120 watts total (average). At rated output, the amplifier provides intermodulation products of better than 63 dBc. The design of the MCPA is entirely solid state, providing trouble free operation and a minimum of maintenance. The MCPA includes a high-speed I/O port to receive commands from the host controller. The MCPA is equipped with microprocessor controlled status monitoring and control circuitry which monitors key MCPA operating conditions and provides remote status output via the rear panel I/O connector. Local operating status is provided via front panel LED indicators. The MCPA is powered by an external (customer supplied) 26-28 VDC power supply.

Figure 1. Ericsson Amplifier Technologies Inc.

MCPA Power Amplifier

1.4 Equipment Functional and Physical Specifications

Table 1 lists the functional and physical specifications of the MCPA power amplifier.

Table 1. Performance Characteristics

MCPA Power Amplifier

PERFORMANCE CHARACTERISTICS

Parameter Specification

Frequency 869 - 894 MHz RF Output Power 120 Watts Average Intermodulation Distortion -3 dBc minimum

when measured with 50 random phase sets.

Gain

69.5±0.25 dB Modulation Format Any Input Return Loss 14 dBr Minimum Load Stability VSWR unconditional, all phases Current Consumption 50 amperes nominal @ 27 VDC DC Input Fully operational from 26 to 28 VDC Operating Temperature

5° to 40° C Operating Humidity 20% to 80% RH, non-condensing Storage Humidity 20% to 95% RH, non-condensing Dimensions 17.88” H x 5.12” D x 16.5” D

45.4 cm H x 13 cm W x 41.9 cm D

(Optional Configuration Available) RF, DC, and I/O interface (Blind mate): 24W7 Sub-miniature connector, OSP LED Status Monitoring Loop Alarm, VSWR Alarm, Temperature

Alarm, Power Supply Alarm, Fan Alarm,

Over Power Alarm, and DC On

1.5 Mechanical Description

The MCPA is contained in a chassis that can be mounted in a subrack enclosure. A central heatsink is permanently mounted as part of the assembly (casting/housing). Cooling is provided by 2 integral rear mounted fans that are easily replaced without the need for chassis disassembly, or removal of power to the amplifier. Airflow through the MCPA is from front through the rear of the unit.

2. INSTALLATION

2.1 Introduction

This section contains receiving, unpacking and installation recommendations for the Ericsson Amplifier Technologies MCPA multi-carrier power amplifier. Carefully read and review all of the information contained in this section before attempting to install or operate the MCPA. In addition, read and review the operating instructions contained in Section 3 before operating the equipment.

2.2 Electrical Service Recommendations

Ericsson Amplifier Technologies strongly recommends the use of AC line conditioning and surge suppression devices at the primary AC input to the power source for the MCPA. All electrical connections should be in accordance with the National Electric Code, and any applicable state and local codes. In addition, lightning protection for all systems is strongly recommended. The electric service must be well grounded.

The amplifier power source should be equipped with a separate circuit breaker, installed in a load center with a separate mains switch or breaker. This arrangement permits future service and maintenance of the MCPA without the necessity for removing power to the entire site.

2.3 Receiving, Unpacking and Inspection

The MCPA has been tested and calibrated at the factory prior to shipment. No additional readjustment is required prior to installation.

The MCPA is shipped in a single container. Check the exterior of the shipping container for any visible signs of damage. If possible, open the container in the presence of the delivery agent. Carefully unpack the MCPA and save all packing material for possible reshipment. After removal from the container, check the MCPA for physical damage such as scratched panels, damaged connectors, etc. If damage is noted, immediately file claim with the delivery agent or freight carrier.

2.4 Repackaging for Shipment

Should it ever become necessary to re-ship the MCPA for service or repair, the following procedure should be followed.

a. Use the original container, if possible. b. Wrap the item in heavy paper or plastic before placing it in the shipping container. c. Use packing material around all sides of the item. d. Use a heavy cardboard box or a wooden container to house the item. Seal the

container with heavy-duty tape (Fiberglas) or strap the container with metal bands. e. Mark the container: "FRAGILE - DELICATE INSTRUMENT".

2.5 Environmental Limitations

The MCPA is designed to operate in an environment as noted in Table 1 of this manual. The MCPA must be installed in an area where an adequate and unrestricted supply of air is available for cooling. Adequate clearance must be provided to prevent obstruction of airflow. Confirm that proper dc power is available for the equipment.

2.6 Installation

The amplifier is produced in a Blind Mate configuration as shown in Figure 2. The Blind Mate configuration is designed for mounting in an Ericsson Amplifier Technologies subrack, and features a single connector on the rear panel for all RF, DC and I/O interface connections. The following paragraphs provide installation details.

2.6.1 Recommended Tools The following tools are recommended to assist in the installation of the amplifier.

• #1 and #2 Phillips screwdrivers

• Slotted screwdrivers, 1/8” and 1/4”

• A 5/16” or 3.5mm open-end wrench

• A multi-meter with probes

2.6.2 Blind Mate Configuration Mounting a. Install an amplifier module into each of the mating slots of the subrack, beginning

from the left. Use firm, but not excessive force when installing the amplifiers to ensure a good connection is made.

b. Hand tighten the retaining screws on the front panels of the amplifier modules. Do

not over tighten.

c. Ensure that an unrestricted supply of air is available at the front and rear of the

enclosure for cooling.

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Ericsson 1/KRB 101 1108 Installation, Operation And Maintenance Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual