MPD Technologies FFPA8689-120 Manuel

M P D T E C H N O L O G I E S , I N C .

49 WIRELESS BOULEVARD HAUPPAUGE, NEW YORK 11788 (516)231-1400 FAX (516)231-8081

MODEL FFPA8689-120

INSTALLATION, OPERATION AND

MAINTENANCE INSTRUCTIONS

FOR

FEED FORWARD

POWER AMPLIFIER

PREPARED

SEPTEMBER 1, 1999

NOTICE

PROPRIETARY AND PRIVATE

The information contained in this document is the property of

Microwave Power Devices, Inc. (MPD), and shall be kept in strict

confidence. Except with the written permission of MPD, 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information shall not be published, or disclosed to others, or used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.

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 2

1. Publication # & Edition

MPD Technologies Incorporated

49 Wireless Boulevard

Hauppauge NY USA 11788.

MPD Technologies Incorporated provides this manual “as is” without warranty of

any kind, either expressed or implied. MPD Technologies may make improvements

or changes in the product and manual at any time without notice.

This manual may include technical inaccuracies or typographical errors. Changes

are periodically made to the information herein, these changes may be

incorporated in new editions of this publication.

MPD Technologies is interested in receiving comments from the users of this

manual in order to improve its usefulness. All comments should directed to the

address listed below. MPD 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 - If the equipment appears to be damaged in any way, remove all power

to the unit and it serviced as soon thereafter as possible. The use of an earth

ground is required to ensure safety.

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 3

Warranty

MPD Technologies offers a Limited Warranty of 12 months from the date of original

shipment unless otherwise agreed to in writing.

Any warranty is void (1) if the equipment has been subject to unauthorized alteration,

modification or repair or (2) defects or failures resulting from improper handling,

storage, operation, interconnection or installation; failure to continually provide a

suitable installation and operational environment; or any other cause beyond the range

of normal usage for the equipment (except, in all of the foregoing cases, when caused

by MPD).

Return Procedures

Your MPD amplifier has been extensively tested and inspected prior to shipment to

ensure proper operation at time of delivery and beyond. However, should your

equipment fail to operate properly, return the failed unit to MPD using a Return

Authorization number.

To obtain a Return Authorization number, contact the customer service department

during business hours 8 A.M. to 5 P.M. Eastern Standard Time.

The customer shall be responsible for the return of the equipment to MPD and packed

to ensure safe arrival. MPD shall return repaired, amended or altered equipment,

packed to ensure safe arrival to the Customer’s designated location.

Limitation of Liability

In no event will MPD Technologies be liable to customer or anyone else for special

collateral, exemplar, indirect, incidental or consequential damages, loss of goodwill,

loss of profits or revenues, loss of savings, loss of life, interruptions of business, and

claims of customers, whether such damages occur prior or subsequent to or are alleged

as a result of tortuous conduct, even if MPD Technologies has been advised of the

possibility of such damages.

Table of Contents

1. GENERAL DESCRIPTION.......................................................................................................5

1.1 Introduction...........................................................................................................................................5

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 4

1.2 General Description ..............................................................................................................................6

1.3 Equipment Functional and Physical Specifications...........................................................................8

1.4 Mechanical Description........................................................................................................................8

2. INSTALLATION ........................................................................................................................9

2.1 Introduction...........................................................................................................................................9

2.2 Electrical Service Recommendations ................................................................................................10

2.3 Receiving, Unpacking and Inspection ...............................................................................................10

2.4 Repackaging for Shipment.................................................................................................................11

2.5 Environmental Limitations................................................................................................................11

2.6 Installation...........................................................................................................................................11

2.7 Cable Interconnections.......................................................................................................................12

2.8 I/O Connector Wiring.........................................................................................................................12

2.9 Verify Connections..............................................................................................................................12

2.10 Verify DC Supply Voltage................................................................................................................12

3. OPERATING INSTRUCTIONS..............................................................................................13

3.1 Safety Precautions...............................................................................................................................13

3.2 Controls and Indicators......................................................................................................................14

3.2.1 Local Controls and Indicators........................................................................................................14

3.2.2 Remote Control/Status Interface....................................................................................................18

3.3 Initial Turn On Procedure .................................................................................................................18

3.4 Normal Operation...............................................................................................................................19

3.5 Shut Down Procedure.........................................................................................................................19

4. PRINCIPLES OF OPERATION.............................................................................................19

4.1 Introduction.........................................................................................................................................19

4.2 RF Input Signal ...................................................................................................................................19

4.3 RF Output Load..................................................................................................................................19

4.4 System Functional Description ..........................................................................................................19

4.4.1 Main Amplifier ..............................................................................................................................20

4.4.2 Error Amplifier ..............................................................................................................................20

4.4.3 Amplitude and Phase Adjustment..................................................................................................21

4.4.4 Amplifier Module Cooling ............................................................................................................21

4.5 Power Distribution..............................................................................................................................21

4.6 Intermodulation...................................................................................................................................21

4.6.1 Two tone Intermodulation..............................................................................................................21

4.7 Alarms..................................................................................................................................................21

5. MAINTENANCE......................................................................................................................23

5.1 Introduction.........................................................................................................................................23

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 5

5.2 Periodic Maintenance .........................................................................................................................23

5.3 Cleaning Air Inlets/Outlets.................................................................................................................24

5.4 Test Equipment Required ..................................................................................................................24

5.5 Performance Tests...............................................................................................................................24

List of Figures

Figure 1. Model FFPA8689-120 Feed Forward Linear Power Amplifier.............................................7

Figure 2. MPD Technologies, Inc. Model FFPA8689-120 Outline/Installation Drawing ...................9

Figure 3. Model FFPA8689-120 Local Controls and Indicators ..........................................................15

Figure 4. Block Diagram, Model FFPA8689-120 FFPA........................................................................22

Figure 5. Front View FFPA8689-120…………………………………………………………………..

Figure 6. Back View FFPA8689-120……………………………………………………………………26

List of Tables

Table 1. Performance Characteristics, Model FFPA8689-120 Linear Power Amplifier ....................6

Table 2. Periodic Maintenance Tasks......................................................................................................23

Table 3. Test Equipment Required..........................................................................................................24

Table 4. Blind Mate Connector

Assignments…………………………………………………………..27

1. GENERAL DESCRIPTION

1.1 Introduction

This manual provides information for the installation, operation and maintenance of

MPD Technologies, Inc. model FFPA8689-120 feed forward linear power amplifier.

The manual is organized in 5 sections as follows:

•Section 1. General Description

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 6

•Section 2. Installation

•Section 3. Operating Instructions

•Section 4. Principles of Operation

•Section 5. Maintenance

1.2 General Description

The FFPA8689-120 (Figure 1-1) is a microprocessor-controlled linear power amplifier

(FFPA) 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 65 dBc. The design of the FFPA is entirely solid

state, providing trouble free operation and a minimum of maintenance. The FFPA8689-

120 includes a high-speed I/O port to receive commands from the host controller. An

internal transmitter sends data to the host controller regarding the performance and

health of the FFPA8689-120. The FFPA8689-120 is equipped with microprocessor

controlled status monitoring and control circuitry which monitors key FFPA 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 FFPA8689-120 is

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 7

Figure 1. Model FFPA8689-120 Feed Forward Power Amplifier

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 8

1.3 Equipment Functional and Physical Specifications

Table 1 lists the functional and physical specifications of the FFPA8689-120 linear

power amplifier.

Table 1. Performance Characteristics

Model FFPA8689-120 Linear Power Amplifier

PERFORMANCE CHARACTERISTICS

Parameter Specification

Frequency 869 - 894 MHz

RF Output Power 120 Watts Average

Intermodulation Distortion 65 dBc minimum

when measured with 50 random phase sets.

Gain 61±0.25 dB

Modulation Format Any

Input Return Loss 18 dbr Minimum

Load Stability VSWR unconditional, all phases

Current Consumption 50 amperes nominal @ 27 Vdc

DC Input Fully operational from 24 to 28 VDC

Operating Temperature 0° to 50° C

Operating Humidity 20% to 80% RH, non condensing

Storage Humidity 20% to 95% RH, non condensing

Dimensions 349.5 mm H x 130 mm W x 422.4 mm D

(Optional Configuration Available)

RF, DC, and I/O interface Blindmate 24W7 Sub-miniature connector

LED Status Monitoring Loop Alarm, VSWR Alarm, Temperature Alarm, Power

Supply Alarm, Fan Alarm, Over Power Alarm, and DC

1.4 Mechanical Description

The FFPA8689-120 is contained in a 19-inch rack mountable enclosure. A central

heatsink is permanently mounted as part of the assembly (casting/housing). Cooling is

provided by 2 integral rear mounted fans which are easily replaced without the need for

chassis disassembly. Airflow through the FFPA is from front through the rear of the unit.

2. INSTALLATION

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 9

Figure 2, is the outline/installation drawing for the FFPA8689-120 linear power amplifier.

Figure 2. MPD Technologies, Inc.

Model FFPA8689-120

Outline/Installation Drawing

INSTALLATION (cont.)

2.1 Introduction

This section contains receiving, unpacking and installation recommendations for the

model FFPA8689-120 feed forward linear power amplifier. Carefully read and review all

MPD TECHNOLOGIES, INC. Model FFPA8689-120

PM/8689120R1.DOC-991101 10

of the information contained in this section before attempting to install or operate the

FFPA. In addition, read and review the operating instructions contained in Section 3

before operating the equipment.

2.2 Electrical Service Recommendations

MPD Technologies strongly recommends the use of AC line conditioning and surge

suppression devices at the primary AC input to the power source for the FFPA. All

electrical connections should be in accordance with National Electric Code, and any

applicable state and local codes. In addition, lightning protection for all systems is

strongly recommended. Lightning arrestors are recommended at the service entrance

as well. 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 service and maintenance of the FFPA without the necessity for removing power

to the entire site.

2.3 Receiving, Unpacking and Inspection

The FFPA has been tested and calibrated at the factory prior to shipment. No

additional readjustment is required prior to installation.

The FFPA 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 FFPA and save all packing material for possible

reshipment. After removal from the container, check the FFPA for physical damage

such as scratched panels, damaged connectors, etc. If damage is noted, immediately

file claim with the delivery agent or freight carrier.

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