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MPD Technologies FFPA8689-120 Installation, Operation And Maintenance Instructions

Feed forward power amplifier
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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information shall not be published, or disclosed to others, or used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.
M P D
T E C H N O L O G I E S , I N C .
49 WIRELESS BOULEVARD
MODEL FFPA8689-120
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
FOR
FEED FORWARD
POWER AMPLIFIER
PREPARED
SEPTEMBER 1, 1999
NOTICE
PROPRIETARY AND PRIVATE
HAUPPAUGE, NEW YORK 11788
(516)231-1400
FAX (516)231-8081

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  • Page 1 MODEL FFPA8689-120 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 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.
  • Page 2 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.
  • Page 3 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...

  • Page 4: Table Of Contents

    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 PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.
  • Page 5 Figure 5. Front View FFPA8689-120… … … … … … … … … … … … … … … … … … … … … … … … … .. Figure 6. Back View FFPA8689-120… … … … … … … … … … … … … … … … … … … … … … … … … … 26 List of Tables Table 1.

  • Page 6: General Description

    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.

  • Page 7: Figure 1. Model Ffpa8689-120 Feed Forward Linear Power Amplifier

    MPD TECHNOLOGIES, INC. Model FFPA8689-120 Figure 1. Model FFPA8689-120 Feed Forward Power Amplifier PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 8: Equipment Functional And Physical Specifications

    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...

  • Page 9: Installation

    MPD TECHNOLOGIES, INC. Model FFPA8689-120 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.) Introduction This section contains receiving, unpacking and installation recommendations for the model FFPA8689-120 feed forward linear power amplifier. Carefully read and review all PM/8689120R1.DOC-991101...

  • Page 10: Electrical Service Recommendations

    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.

  • Page 11: Repackaging For Shipment

    Install the FFPA in the desired location in the rack, making sure that an unrestricted supply of air is available at the front and rear of the enclosure. PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 12: Cable Interconnections

    ±0.5 vdc. Refer to Section 3 for operating instructions. !! CAUTION !! DO NOT OPERATE FFPA WITH A DC SUPPLY VOLTAGE OUTSIDE OF THESE LIMITS. DAMAGE WILL OCCUR TO THE FFPA FROM IMPROPER SUPPLY APPLICATION. PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 13: Operating Instructions

    Do not remove or exchange RF cables of the output load circuit while the FFPA is in operation. Dangerous RF voltage may exist at the foremost terminal of the interrupted load circuit during operation. !! CAUTION !! PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 14: Controls And Indicators

    I/O interface for remote status monitoring and control. The following paragraphs detail these features. 3.2.1 Local Controls and Indicators Figure 3 is the front view of the FFPA, and the following controls and indicators: PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 15: Figure 3 Model Ffpa8689-120 Local Controls And Indicators

    MPD TECHNOLOGIES, INC. Model FFPA8689-120 Figure 3 Model FFPA8689-120 Local Controls and Indicators PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.
  • Page 16 2 dB above nominal operating power level. NOTE: Loop, VSWR, Power Supply, Temperature, and Overpower alarms will shut the FFPA down. **See the note on the following page regarding the ON/OFF sequence of the FFPA** PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.
  • Page 17 VDC bias are on. Typical current without any RF applied to the FFPA is 18 amps. Pressing the On/Off switch a third time will bias off the Module. Pressing the On/Off switch a fourth time will turn off the FFPA module completely. PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 18: Remote Control/Status Interface

    Improper RF input may cause severe FFPA damage. g. Increase input level to between -15 and -11 dBm, and observe that only the following indicators are illuminated on the front panel of the FFPA: DC ON PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 19: Normal Operation

    Introduction This section contains a functional description of the Feed Forward linear SMR Power Amplifier. Refer to the block diagram of the FFPA8689-120 FFPA, Figure 4. RF Input Signal The maximum input signal for all carrier frequencies should not exceed the limits specified in the electrical specifications.

  • Page 20: Main Amplifier

    The error amplifier operates class A, has 47 dB of gain, and produces a 2W output. The amplifier operates on 27.0 VDC, and PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 21: Amplitude And Phase Adjustment

    22-29V DC input. The power supply board converts the input voltage to +/-5V, and +/-15V used by the loop processor and microprocessor. Intermodulation The FFPA8689-120 amplifier is designed to deliver 120W average power, multicarrier signal, operating over the passband of 869-894 MHz. 4.6.1 Two Tone Intermodulation...

  • Page 22: Figure 4. Block Diagram, Model Ffpa8689-120 Ffpa

    MPD TECHNOLOGIES, INC. Model FFPA8689-120 R F o u t R F in Figure 4. Block Diagram, Model FFPA8689-120 FFPA PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 23: Maintenance

    Cables and Connectors 12 Months Inspect all cables for any signs of damage or wear. Check and verify that all connections are secure. 12 Months Perform tests as Performance Tests outlined in paragraph 2.5. PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 24: Cleaning Air Inlets/Outlets

    6673A Performance Tests Performance tests should be performed at 12 month intervals, or as directed by the resident maintenance authority, to ensure that the FFPA is functioning properly and within expected specification limits. PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 25: Figure 5. Front View Ffpa8689-120

    MPD TECHNOLOGIES, INC. Model FFPA8689-120 Figure 5, Front View FFPA 8689-120 PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 26: Figure 6. Back View Ffpa8689-120

    MPD TECHNOLOGIES, INC. Model FFPA8689-120 Figure 6, Back View FFPA 8689-120 PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

  • Page 27: Table 4. Blind Mate Connector Assignments

    RS-232 Signal Ground Reserved Internal usage Data Out 2 RS-232 Data In 2 RS-232 13-14 Reserved Internal usage 15-17 RF in A3, A4 +DC Power In A5, A6 DC Power Return RF out PM/8689120R1.DOC-991101 © 1999 - MPD TECHNOLOGIES, INC.

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