Powerwave Technologies 5JS0032 User Manual

INSTALLATION & SERVICE

MANUAL

MODEL K-10

CONTINUOUS DUTY

POWER AMPLIFIER

850-870 MHz

25 June 1998

Powerwave Technologies, Inc. Tel: [phone]
2026 McGaw Avenue Fax: [phone]
Irvine, CA 92614 Web Site: www.pwav.com

044-05040 Rev. A

TABLE OF CONTENTS

Par. Section 1 Page
No. General Description 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

1-5 Ordering Information........................................................................................................ 1-2

Section 2

Installation

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 Alarm and Control Connector .............................................................. 2-2

Section 3

Operating Instructions

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

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

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

3-4 Variable Input Switch....................................................................................................... 3-3

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 Functional Description..................................................................................................... 4-1

4-5 K10 Amplifier Module....................................................................................................... 4-3

4-5.1 Main Amplifier.................................................................................................................. 4-3

4-5.2 Loop Control.................................................................................................................... 4-3

4-5.3 Amplifier Monitoring......................................................................................................... 4-3

4-5.4 Amplifier Module Cooling.................................................................................................4-3

4-6 Power Distribution............................................................................................................ 4-4

044-05040 Rev. A

ii

TABLE OF CONTENTS (Continued)

Section 5
Maintenance

5-1 Introduction...................................................................................................................... 5-1

5-2 Periodic Maintenance...................................................................................................... 5-1

5-3 Test Equipment Required for Test................................................................................... 5-1

5-4 Cleaning air Inlets/Outlets................................................................................................ 5-2

5-5 Performance Test............................................................................................................ 5-2

5-5.1 Amplifier Performance Test.............................................................................................5-2

5-6 Field Replaceable Parts and Modules............................................................................. 5-4

5-6.1 K10 Power Amplifier Module ........................................................................................... 5-4

5-6.2 Cooling Fans.................................................................................................................... 5-4

5-6.3 Fuse................................................................................................................................. 5-4

Section 6

Troubleshooting

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

6-2 Troubleshooting............................................................................................................... 6-1

6-3 Return for Service Procedure.......................................................................................... 6-2

6-3.1 Obtaining an RMA ........................................................................................................... 6-2

6-3.2 Repackaging for Shipment.............................................................................................. 6-2

LIST OF ILLUSTRATIONS

Figure Page
No. No.

1-1 Five K10 Amplifiers in Subrack........................................................................................ 1-3

2-1 Alarm and Control Connector (on Rear of K10 Module).................................................. 2-2

2-2 K10 Amplifier, Rear view ................................................................................................. 2-4

3-1 K10 Amplifier Module Control and Indicators .................................................................. 3-1

3-2 Terminal Block TB1......................................................................................................... 3-3

4-1 Variable Input Switch....................................................................................................... 4-1

4-2 K10 Block Diagram.......................................................................................................... 4-2

5-1 Amplifier Test Setup diagram .......................................................................................... 5-3

LIST OF TABLES

Table Page
No. No.

1-1 Major Amplifier Components........................................................................................... 1-2

1-2 K10 Amplifier Functional Specifications........................................................................... 1-2

1-3 Load Mismatch Tolerance............................................................................................... 1-2

2-1 Amplifier Module Alarm and Control Connections........................................................... 2-3

3-1 Amplifier Module Control and Indicators.......................................................................... 3-2

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

5-2 Test Equipment Required................................................................................................ 5-2

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

044-05040 Rev. A

iii

Section

1

GENERAL DESCRIPTION

1-1. INTRODUCTION

This manual contains information and procedures for installation, operation, and maintenance of
Powerwave’s K10 Continuous Duty Power Amplifier. The manual is organized into five 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 K10 amplifier is designed for trunking and conventional repeater applications requiring high
duty cycles. The K10 amplifier operates from RF power sources of 250 milliwatts up to 25 watts.
The amplifier consists of an input attenuator, a predriver amplifier, a microprocessor control
circuit, and two stages of amplification followed by a 7-pole distributed low-pass filter and
associated control circuitry. The K10 amplifier has a microprocessor control board that maintains
a constant output power under varying signal input and output load conditions. A system
functional block diagram of the Model K10 amplifier is contained in section 4 of this manual.

1-3. FUNCTIONAL AND PHYSICAL SPECIFICATIONS

Functional and physical specifications for the K10 amplifier are listed in tables 1-2 and 1-3.

1-4. EQUIPMENT CHANGES

Powerwave Technologies, Inc. reserves the right to make minor changes to the equipment
without notice, including but not necessarily limited to component substitution and circuitry
changes. Such changes may or may not be incorporated in this manual, although it is our
intention to keep each manual as up-to-date as possible. To that end, we ask that you, our
customer, share with us information acquired in field situations which might be of assistance to
another user. If you share it with us, we'll pass it around.

044-05040 Rev. A 1-1

1-5. ORDERING INFORMATION

Table 1-1 following gives the part numbers and descriptions to be used when ordering either an
entire amplifier or replacement fans.

Table 1-1. Major Amplifier Components

MODEL NUMBER DESCRIPTION

K10

250 mW - 25 W 850-870
MHz Amplifier.

800-00889-001 Fan Assembly.

Table 1-2. K10 Amplifier Functional Specifications

Frequency Range: 850-870 MHz.
Operating Voltage: +28 Vdc (+1.0 Vdc)

Current Draw

9 Amperes Typical

11 Amperes Maximum
Duty Cycle: 100%
Power Input: 250 mW – 25 W.
Power Output: 100 Watts
Spurious & Harmonics: -70 dBc (Minimum)
Input/Output Impedance 50 ohms (Nominal)
Load VSWR Tolerance: See Chart
Input/Output Connector: Type 'N' Female
Vertical Mounting: 10.47"
Horizontal Mounting: 3.38"
Depth: 17.0"
Weight: 20 Pounds Nominal
Cooling Method: Fan Forced Air Over Heatsink
Operating Temp. Range: 0 °C. to +60 °C.
Storage & Transport: -10 °C. to +70 °C.
Humidity: 80% at +40 °C. (Noncondensing)
Altitude: 10,000 Feet Maximum

OPTIONS

INDICATORS

DC PWR ON, LOW OUTPUT, LOW INPUT,

HIGH INPUT, HIGH VSWR, OVER TEMP.,
Remote Control/Display Panel

L.E.D. POWER BAR METER

CONTROLS

PWR CONTROL (-10 dB)

NOTES: Manufacturer's Rated Output Power of this Equipment is for Single Carrier

Operation.
All specifications apply at +28 Vdc operating voltage.

Table 1-3. Load Mismatch Tolerance

Full Power, Sustained Operation 2:1 Maximum
Sustained Operation at Reduced Power 3:1
Microprocessor Shutdown 10:1

044-05040 Rev. A 1-2

044-05040 Rev. A 1-3

Section

2

INSTALLATION

2-1. INTRODUCTION
This section contains installation recommendations, unpacking, inspection, and installation
instructions for the K10 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 Parts 73 and 74 of 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 +28 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.

Each amplifier system should have its own circuit breaker, so a failure in one does not shut off the
whole installation. Circuit breakers should be thermal type, capable of handling an inrush current
of 90 Amps, in a load center with a master switch.

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

Visually inspect the amplifier module for damage that may have occurred during shipment. Check
for evidence of water damage, bent or warped chassis, loose screws or nuts, or extraneous
packing material in the connector or fans. Inspect the rear panel connector 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.

caused by rough or careless handling.

044-05040 Rev. A 2-1

2-4. INSTALLATION INSTRUCTIONS (Refer to figures 1-1 and 2-2)
The K10 amplifier module is designed for installation in a subrack that permits access to the rear
of the subrack for connection of DC power, RF, and monitor cables.

To install the amplifier proceed as follows:

1. Install subrack in equipment rack and secure in place.

2. Install the plug-in K10 amplifier module(s) in the subrack. Tighten top and bottom
thumbscrews.

3. Connect 50-ohm antenna cable to RF OUT connector on rear of amplifier module.

4. Connect the transceiver/exciter output to RF IN connector on rear of amplifier module.

5. Connect alarm and control cable to 9-pin D-sub connector on rear of amplifier module. Refer
to paragraph 2-5 for connector definition.

WARNING
Turn off external primary DC power before
connecting DC power cables.

6. Connect positive primary power to +28V terminal and negative primary power to GND terminal
on rear of amplifier module. Tighten the power connections.

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

8. Measure primary DC input voltage. DC input voltage should be +28 Vdc ±1.0 Vdc. If the DC
input voltage is above or below the limits, call and consult Powerwave before you turn on your
amplifier system.

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

2-5. AMPLIFIER MODULE ALARM AND CONTROL CONNECTOR

The alarm and control connections on the amplifier are made through a female 9-pin D-sub
connector (figure 2-1) and are listed and described in table 2-1.

Figure 2-1. Alarm and Control Connector (on Rear of K10 Module)

044-05040 Rev. A 2-2