MPD Technologies FFPA8689-120 Maintance Manual
MODEL FFPA8689-120
The information contained in this document is the property of
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
FOR
FEED FORWARD
POWER AMPLIFIER
PREPARED
SEPTEMBER 1, 1999
NOTICE
PROPRIETARY AND PRIVATE
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information shall not be published, or disclosed to others, or used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.
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
MPD TECHNOLOGIES, INC. Model FFPA8689-120
All specifications are subject to change without notice.
1. Publication # & Edition
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 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.
MPD Technologies Incorporated
49 Wireless Boulevard
Hauppauge NY USA 11788.
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© 1999 - MPD TECHNOLOGIES, INC.
MPD TECHNOLOGIES, INC. Model FFPA8689-120
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.
1. GENERAL DESCRIPTION.......................................................................................................5
1.1 Introduction...........................................................................................................................................5
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© 1999 - MPD TECHNOLOGIES, INC.
Table of Contents
MPD TECHNOLOGIES, INC. Model FFPA8689-120
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
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© 1999 - MPD TECHNOLOGIES, INC.
MPD TECHNOLOGIES, INC. Model FFPA8689-120
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…………………………………………………………………..
25
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
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© 1999 - MPD TECHNOLOGIES, INC.
MPD TECHNOLOGIES, INC. Model FFPA8689-120
• 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 FFPA8689120 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
powered by an external (customer supplied) 24-28 vdc power supply.
PM/8689120R1.DOC-991101 6
© 1999 - MPD TECHNOLOGIES, INC.
MPD TECHNOLOGIES, INC. Model FFPA8689-120
Figure 1. Model FFPA8689-120 Feed Forward Power Amplifier
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© 1999 - MPD TECHNOLOGIES, INC.
MPD TECHNOLOGIES, INC. Model FFPA8689-120
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
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
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
RF, DC, and I/O interface Blindmate 24W7 Sub-miniature connector
LED Status Monitoring Loop Alarm, VSWR Alarm, Temperature Alarm, Power
61±0.25 dB
0° to 50° C
(Optional Configuration Available)
Supply Alarm, Fan Alarm, Over Power Alarm, and DC
On
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
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© 1999 - MPD TECHNOLOGIES, INC.
MPD TECHNOLOGIES, INC. Model FFPA8689-120
Figure 2, is the outline/installation drawing for the FFPA8689-120 linear power amplifier.
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
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© 1999 - MPD TECHNOLOGIES, INC.
Figure 2. MPD Technologies, Inc.
Model FFPA8689-120
Outline/Installation Drawing
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