Powerwave Technologies 5JS0057 User Manual

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869-894 MHz

Installation & Service

Manual

Model SCA 9350-30

Single-Channel Cellular Amplifier

044-xxxxx Rev.x December 2001

SCA 9350-30 Installation and Service Manual

© 2001 Powerwave Technologies Incorporated. All rights reserved. Powerwave Technologies, and the Powerwave logo are registered trademarks Powerwave Technologies, Inc. reserves the right to make changes to the documentation and

equipment, including but not limited to component substitution and circuitry changes. Changes that impact this manual may subsequently be incorporated in a later revision of this manual.

December 2001

Powerwave Technologies, Inc. Tel: (714) 466-1000 1801 East St. Andrew Place (888) 797-9283 Santa Ana, CA 92705 Fax: (714) 466-5800

Web Site: www.powerwave.com

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SCA 9350-30 Installation and Service Manual

Table Of Contents

Par. Section 1 Page No.

1-1 Introduction................................................................................................................................... 1-1

1-2 General Description....................................................................................................................... 1-1

1-3 Functional and Physical Specifications .........................................................................................1-1

1-4 Equipment Changes.......................................................................................................................1-1

2-1 Introduction................................................................................................................................... 2-1

2-2 Electrical Service Recommendations ............................................................................................2-1

2-3 Unpacking and Inspection............................................................................................................. 2-1

2-4 Installation Instructions.................................................................................................................2-2

2-5 Amplifier Module Connectors.......................................................................................................2-2

2-5.1 Data I/O Connector........................................................................................................................2-3

2-5.2 Amplifier RF Connectors ..............................................................................................................2-4

2-5.3 DC Power Connector.....................................................................................................................2-4

General Description No.

Section 2

Installation

Section 3

Operating Instructions

3-1 Introduction................................................................................................................................... 3-1

3-2 Location and Function of Amplifier Indicators.............................................................................3-1

3-3 Initial Start-Up and Operating Procedures.....................................................................................3-1

Section 4

Principles of Operation

4-1 Introduction................................................................................................................................... 4-1

4-2 RF Input Signal..............................................................................................................................4-1

4-3 RF Output Load............................................................................................................................. 4-1

4-4 SCA 9350-30 Amplifier ................................................................................................................ 4-1

4-4.1 Driver Amplifier............................................................................................................................ 4-2

4-4.2 Main Amplifier.............................................................................................................................. 4-2

4-4.3 Power Distribution.........................................................................................................................4-2

4-4.4 Multifunction Board...................................................................................................................... 4-2

Section 5

Maintenance

5-1 Periodic Maintenance.................................................................................................................... 5-1

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SCA 9350-30 Installation and Service Manual

Section 6

Troubleshooting

6-1 Introduction................................................................................................................................... 6-1

6-2 Trouble shooting............................................................................................................................6-1

6-3 Return for Service Procedures....................................................................................................... 6-1

6-3.1 Obtaining an RMA........................................................................................................................ 6-1

6-3.2 Repackaging for Shipment.............................................................................................................6-1

List Of Illustrations

Figure Page No. No.

1-1 SCA 9350-30 Amplifier ................................................................................................................ 1-3

2-1 SCA 9350-30 Front Panel View....................................................................................................2-2

2-2 Data I/O Connector........................................................................................................................2-3

2-3 DC Power Connector.....................................................................................................................2-4

3-1 Front Panel Indicators....................................................................................................................3-1

4-1 SCA 9350-30 Amplifier Block Diagram.......................................................................................4-1

List Of Tables

Table Page No. No.

1-1 SCA 9350-30 Single-Channel Cellular Amplifier Functional Specifications................................1-2

2-1 Data I/O Connector Pin Definition................................................................................................2-3

2-2 Amplifier RF Connector Definition............................................................................................... 2-4

2-3 DC Power Connector Definition ...................................................................................................2-4

6-1 Troubleshooting.............................................................................................................................6-1

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SCA 9350-30 Installation and Service Manual

Section 1 General Description

1-1 Introduction

This manual contains information and procedures for installation, operation, and maintenance of Powerwave’s SCA 9350-30 (Nortel Model No. NTQA37AA) single-channel cellular amplifier. The manual is organized into six sections as follows:

Section 1. General Description Section 2. Installation Section 3. Operating Instructions Section 4. Principles of Operation Section 5. Maintenance Section 6. Troubleshooting

1-2 General Description

The SCA 9350-30 (see figure 1-1) is a single-channel power amplifier that operates in the 25 MHz frequency band from 869 MHz to 894 MHz. It is designed for use in an amplifier system that is modular in design, and is ideally suited for use in GSM/EDGE base stations. The amplifier is capable of transmitting at 30 watts of power in either GMSK or EDGE modulation. All solid-state, the amplifier is designed to provide trouble-free operation with minimum maintenance. The system's modular construction and unique and highly effective operational status and fault monitoring circuitry help minimize downtime. The turn-on and turn-off sequences of voltages are fully automatic, as is overload protection.

Each amplifier module has an I/O connector that allows the host system to monitor the amplifier module performance. Primary power for the amplifier is –48 Vdc. The amplifier has an integrated heat sink for cooling.

1-3 Functional And Physical Specifications

Functional and physical specifications for the amplifier are listed in table 1-1.

1-4 Equipment Changes

Powerwave Technologies, Inc. reserves the right to make minor changes to the equipment, including but not necessarily limited to component substitution and circuitry changes. Changes that impact this manual may subsequently be incorporated in a later revision of this manual.

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1-1 December 2001

SCA 9350-30 Installation and Service Manual

Table 1-1 SCA 9350-30 Single-Channel Cellular A mplifier Functional Specifications

Frequency Range 869-894 MHz Nominal Input Power -0.2 dBm Total Output Power 30 watts nominal / 33 watts maximum RF Gain at 1960 MHz 45 +/- 0.5 dB Gain Variation Over All Conditions: Output Protection: Mismatch Protected Input Port Return Loss: -14 dB (Min) Out of Band Spurious: -50 dBc (max) Spectral Mask Frequency Removed From Carrier GSM EDGE

Duty Cycle: Continuous DC Input Power: -48 VDC; 2.9 amps typical; 4.2 amps max.

Heat Dissipation 375 BTUs typical Operating Temperature: 0 ºC. to +60 ºC. Storage Temperature: -40 ºC. to +75 ºC. Operating Humidity: 5 % - 95 % Relative Humidity (Noncondensing) Storage Humidity: 5 % - 95 % Relative Humidity (Noncondensing) RF Input / Output Connector SMA Female (Input) / Type N Female (Output) DC Power Connector 3-Pin D-Subminiature (20 A Contacts) Data I/O Connector 20-Pin SCSI Dimensions: 2.55” High, 9.48” Wide, 11.85” Deep

±2.0 dB

200 kHz -31 dBc -31 dBc 250 kHz -34 dBc -34 dBc 400 kHz -61 dBc -57 dBc 600 kHz -71 dBc -71 dBc 1200 kHz -74 dBc -74 dBc 1800 kHz -76 dBc -76 dBc 6000 kHz -81 dBc -81 dBc

-36 to –60 VDC, 140 watts typical; 200 watts max.

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SCA 9350-30 Installation and Service Manual

All dimensions are in inches And are for reference only

Figure 1-1. SCA 9350-30 Amplifier

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SCA 9350-30 Installation and Service Manual

Section 2 Installation

2-1 Introduction

This section contains installation recommendations, unpacking, inspection, and installation instructions for the SCA 9350-30 single channel cellular amplifier. Carefully read all material in this section prior to equipment unpacking or installation. Also read and review the operating procedures in Section 3 prior to installing the equipment. It is important that the licensee perform these tasks correctly and in good faith. If applicable, carefully read the Federal Communications Commission (FCC) rules to determine how they apply to your installation. DON'T TAKE CHANCES WITH YOUR LICENSE.

2-2 Electrical Service Recommendations

Powerwave Technologies recommends that proper AC line conditioning and surge suppression be provided on the primary AC input to the -48 Vdc power source. All electrical service should be installed in accordance with the National Electrical Code, any applicable state or local codes, and good engineering practice. Special consideration should be given to lightning protection of all systems in view of the vulnerability of most transmitter sites to lightning. Lightning arrestors are recommended in the service entrance. Straight, short ground runs are recommended. The electrical service must be well grounded.

The amplifier has an internal fuse, so a failure in one does not shut off the whole installation.

2-3 Unpacking And Inspection

This equipment has been operated, tested and calibrated at the factory. Only in the event of severe shocks or other mistreatment should any substantial readjustment be required. Carefully open the container(s) and remove the amplifier module(s). Retain all packing material that can be reassembled in the event that the unit must be returned to the factory.

CAUTION

Exercise care in handling equipment during inspection to prevent damage caused by rough or car eless handling.

Visually inspect the amplifier module for damage that may have occurred during shipment. Check for evidence of water damage, bent or warped chassis, or loose screws or nuts. Inspect the front panel for bent connector pins. If the equipment is damaged, a claim should be filed with the carrier once the extent of any damage is assessed. We cannot stress too strongly the importance of IMMEDIATE careful inspection of the equipment and the subsequent IMMEDIATE filing of the necessary claims against the carrier if necessary. If possible, inspect the equipment in the presence of the delivery person. If the equipment is damaged, the carrier is your first area of recourse. If the equipment is damaged and must be returned to the factory, write or phone for a return authorization. Powerwave may not accept returns without a return authorization. Claims for loss or damage may not be withheld from any payment to Powerwave, nor may any payment due be withheld pending the outcome thereof. WE CANNOT GUARANTEE THE FREIGHT CARRIER'S PERFORMANCE.

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SCA 9350-30 Installation and Service Manual

2-4 Installation Instructions (Refer to figures 1-1 and 2-1)

The SCA 9350-30 is intended for installation in a Restricted Access Location. The SCA 9350-30 amplifier module is designed for installation in a subrack that permits access to

the amplifier’s front panel for connection of DC power, RF, and monitor cables. To install the amplifier proceed as follows:

1. Install amplifier in the BTS rack and secure in place.

2. Connect the amplifier front panel RF Out (Type-N) connector to the antenna cable.

3. Connect the amplifier front panel RF In (Type-SMA) connector to the transceiver output(s).

4. Connect the BTS 20-pin Data I/O cable to the amplifier. Refer to section 2-5.1.

WARNING

Turn off external DC power before connecting DC power cables. Verify that the amplifier is terminated into a proper 50 Ohm load.

5. Connect the DC power cable to the rack and amplifier. Refer to section 2-5.3.

6. Check your work before applying DC voltage to the system. Make certain all connections are tight and correct.

7. Measure DC input voltage. DC input voltage should be -36 to –60 VDC. If the DC input voltage is above or below the limits, call and consult Powerwave before you turn on your amplifier system.

8. Refer to section 3 for initial turn-on and checkout procedures.

2-5 Amplifier Module Connectors

The amplifier has four connectors on the front of the module. These include a SCSI connector which provides the data I/O connections, SMA female RF input, Type N female RF output, and 3pin high current contact DC input connectors. Refer to figure 2-1. Each is fully described in the paragraphs that follow.

Figure 2-1 SCA 9350-30 Front Panel View

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SCA 9350-30 Installation and Service Manual

2-5.1 Data I/O Connector

The amplifier has a separate remote alarm and control connector that may be used by the host system to monitor and control the individual amplifier modules. The status, alarm, and control connections on the amplifier connector are made through a 20-pin SCSI connector (figure 2-2) and are listed and described in table 2-1.

Figure 2-2 Data I/O Connector (on Front Panel)

Table 2-1 Data I/O Connector Pin Definition

Pin Function Description

1 Ground Ground 2 Ground Ground 3 Synchro Signal + Synchro Signal from TRX 4 UART TX + Information Exchange (TRX to PA) 5 Manual Control To Set PA in Test Mode 6 Not Connected 7 UART RX + Information Exchange (PA to TRX) 8 Not Connected

9 Not Connected 10 Not Connected 11 Ground Ground 12 Ground Ground 13 Synchro Signal - Synchro Signal from TRX 14 UART TX - Information Exchange (TRX to PA) 15 Not Connected 16 Not Connected 17 UART RX - Information Exchange (PA to TRX) 18 Not Connected 19 Not Connected 20 Not Connected

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SCA 9350-30 Installation and Service Manual

2-5.2 Amplifier RF Connectors

The amplifier has two RF connectors. The RF Input connector is a SMA female. The input power on this port should not exceed the level specified in table 1-1. The RF Output connector is Type N female. They are listed and described in table 2-2.

Table 2-2 Amplifier RF Connector Definition

Function Description

RF Input SMA Female RF Output Type N Female

2-5.3 DC Power Connector

The DC power connector is a three-pin high current contact D-subminiature connector. The pin configuration is listed in table 2-3 and shown in figure 2-3.

Table 2-3 DC Power Connector Definition

Pin Description

1 -48 V 2 Chassis Ground 3 Battery Return

Figure 2-3 DC Power Connector

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SCA 9350-30 Installation and Service Manual

Section 3 Operating Instructions

3-1 Introduction

This section contains operating instructions for the single channel cellular amplifier system.

3-2 Location A nd Function Of Amplifier Indicators

The front panel LED is located to the right of the 20-pin Data connector and indicates the amplifier status.

• Green means the amplifier is operating properly.

• Red indicates an alarm or off condition.

The nature of the alarm can only be determined through the software interface of the BaseTransceiver System (BTS). Please consult the BTS manual for details on monitoring amplifier status.

Front Panel Status Indicator

Figure 3-1 Front Panel Indicators

3-3 Initial Start-Up A nd Operating Procedures

To perform the initial start-up, proceed as follows:

1. Verify that all input and output cables are properly connected.

CAUTION

Before applying power, make sure that the input and output of the amplifier are properly terminated at 50 ohms. Do not operate the amplifier without a load attached. Refer to table 1-1 for input power requirements. Excessive input power may damage the amplifier

NOTE

The output coaxial cable between the amplifier and the antenna must be 50 ohm coaxial cable. Use of any other cable will distort the output.

2. Turn on supply that provides -48 Vdc to the amplifier system. Do not apply an RF signal to the amplifier system

3. Verify that the LED is lit and the color Green.

4. Turn on external exciter/transceiver and apply RF input signals. Adjust the input power to achieve the desired output power. Refer to the BTS manual for instructions on performing this step.

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SCA 9350-30 Installation and Service Manual

Section 4 Principles of Operation

4-1 Introduction

This section contains a functional description of the single-carrier SCA 9350-30 amplifier.

4-2 RF Input Signal

The maximum input power should not exceed the levels to produce the maximum rated RF output power in table 1-1. This level is approximately 0 dBm, but should be set through the basetransceiver station’s software interface. See the BTS manual for detailed instructions.

4-3 RF Output Load

The load impedance should be as good as possible (1.5:1 or better) in the working band for good power transfer to the load.

4-4 SCA 9350-30 Amplifier

The amplifier, figure 4-1, has an average output power of 30 watts, and is designed to support transmission in GMSK and EDGE modulation. With an input signal of approximately 0 dBm, the amplifier will operate at its rated output power. The amplifier is comprised of:

Driver Amplifier Main Amplifier Multifunction Board DC/DC Converter Module

Temp Sense

DAC

MCU

RS-485 Intfc

Red/

Grn

Driver

Multifunction

Main Amp

5 V Reg.

Current Sense

Input Filter/

Protection

Power Supply

Det

+26

DC/DC

-48/+26

20-pin SCSI

Figure 4-1 SCA 9350-30 Amplifier Block Diagram

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SCA 9350-30 Installation and Service Manual

4-4.1 Driver Amplifier

The driver amplifier is a two-stage amplifier which provides approximately 28 dB of gain in the 25 MHz frequency band from 869 to 894 MHz. The amplifier is mounted directly on a heat sink, which is temperature monitored by a thermal sensor.

4-4.2 Main Amplifier

The main amplifier is a single-stage Class AB amplifier with approximately 13 dB gain and a P1dB of +50 dBm. The amplifier’s output is protected from output mismatches. The amplifier is designed to meet spectral mask requirements for GSM and EDGE signals when operated up to +45.2 dBm. The amplifier is mounted directly on a heat sink.

4-4.3 Power Distribution

The amplifier module operates on a –48 VDC nominal power supply consuming 2.9 amps (typically) current at full power. A DC/DC converter to supply internal circuitry with +26 VDC and +5 VDC.

4-4.4 Multifunction Board

The multifunction board enables communication between the amplifier and the base-transceiver station in which it is installed, and stores information about the amplifier. It includes gain control and two gain stages providing 7 dB gain. The multifunction board also monitors several amplifier performance parameters and reports output power so that the BTS can maintain the output power within specified limits. When these parameters are beyond acceptable levels, the amplifier will alarm. The multifunction board is mounted directly on a heat sink, which is temperature monitored by a thermal sensor.

The alarms are:

Temperature Alarm - If the internal temperature reaches 90°C, the PA shuts down and com-

municates an alarm through the digital interface.

DC/DC Alarm - If the output voltage of the converter falls below 23.5V, the PA shuts down

and communicates an alarm through the digital interface.

Over-current Alarm - If the output current of the DC/DC converter goes above a nominal

threshold (7.5 A), the PA shuts down and communicates an alarm through the digital interface.

Communication Alarm - If the serial interface detects an error in transmission (parity, over-

run, framing), an alarm is sent for one burst only during the very next burst. The PA operation is not affected.

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SCA 9350-30 Installation and Service Manual

Section 5 Maintenance

5-1 Introduction

The amplifier is designed to be operated without any required periodic maintenance other than maintenance which may be recommended by the manufacturer of the BTS. Please consult your BTS manual for guidance.

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SCA 9350-30 Installation and Service Manual

Section 6 Troubleshooting

6-1 Introduction

This section contains a list of problems and a few suggested actions that may correct the problem. If the suggested corrective action does not eliminate the problem, please contact your Powerwave field representative or the factory for further instructions.

NOTE

Check your sales order and equipment warranty before attempting to service or repair the unit. Do not break the seals on equipment under warranty or the warranty will be null and void. Do not return equipment for warranty or repair service until proper shipping instructions are received from the factory.

6-2 Troubleshooting

Refer to table 6-1 for troubleshooting suggestions.

Table 6-1 Troubleshooting

Symptom Suggested Action

1. Check that rack power connection is secure.

LED not lit

LED is red

No RF Output

2. Check for proper power supply voltage.

3. Check that power switch is ON position.

1. Verify amplifier is enabled.

2. A large RF input overdrive has caused an alarm. Reduce input power and re-enable the amplifier.

3. Follow recommendations of BTS operating manual.

1. Check input and output connections and cables for integrity and tightness.

2. Check RF input power to verify that it is present and within specification range.

3. Contact Powerwave field representative or factory.

6-3 Return For Service Procedures

When returning products to Powerwave, the following procedures will ensure optimum response.

6-3.1 Obtaining An RMA

A Return Material Authorization (RMA) number must be obtained prior to returning equipment to the factory for service. Please contact our Repair Department at (888) 797-9283 or (714) 4661000 to obtain this number, or FAX your request to (714) 466-5816. Failure to obtain this RMA number may result in delays in receiving repair service.

6-3.2 Repackaging For Shipment

To ensure safe shipment of the amplifier, it is recommended that the package designed for the amplifier be used. The original packaging material is reusable. If it is not available, contact Powerwave’s Customer Service Department for packing materials and information.

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Powerwave Technologies 5JS0057 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual