E675JS0061Amplifier

869-894 MHz Model NTGS86AB Single-Channel Power Amplifier Installation & Service Manual  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A October 2002 NTGS86AB Installation & Service Manual October 2002 © 2002 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. 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  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A ii October 2002 NTGS86AB Installation & Service Manual Table Of Contents Paragraph 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 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 2-8 Molex 18-Pin Power, Alarms, & Controls Connector.............................................................................. 2-3 Section 3 Operating Instructions 3-1 Introduction.....................................................................................................................................................3-1 3-2 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 Amplifier Functional Description................................................................................................................4-1 4-4.1 Input Amplifier and Pre-Distortion Amplifier........................................................................................... 4-1 4-4.2 Driver Amplifier..............................................................................................................................................4-1 4-4.2 Main Amplifier................................................................................................................................................4-2 4-5 Amplifier Module Cooling............................................................................................................................4-2 4-6 Power Distribution.........................................................................................................................................4-3 Section 5 Maintenance 5-1 Introduction.....................................................................................................................................................5-1 5-2 Periodic Maintenance...................................................................................................................................5-1 5-3 Amplifier Module Field Replacement .......................................................................................................5-1 Section 6 Troubleshooting 6-1 Introduction.....................................................................................................................................................6-1 6-2 Troubleshooting..............................................................................................................................................6-1 6-3 Return for Service Procedures....................................................................................................................6-1 6-3.1 Obtaining an RMA..........................................................................................................................................6-1  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A October 2002 iii NTGS86AB Installation & Service Manual 6-3.2 Repackaging for Shipment...........................................................................................................................6-1 List Of Illustrations Figure Page No. No. 1-1 NTGS86AB Amplifier Isometric View.........................................................................................................1-3 1-2 NTGS86AB Amplifier Top and Si…

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NTGS86AB Installation & Service Manual Section 4 Principles of Operation 4-1 Introduction This section contains a functional description of the NTGS86AB Single-Carrier Cellular Power Amplifier module. 4-2 RF Input Signal The maximum input power should not exceed the limits specified in table 1-1. 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 Amplifier Functional Description The NTGS86AB amplifier (figures 1-1 and 4-1) is a linear, single-channel power amplifier that operates in the 25 MHz frequency band from 869 MHz to 894. The amplifier produces a typical output power of 25 watts (44 dBm). Each amplifier in a system is a self-contained module and is functionally independent of any other amplifier modules. Each amplifier module has alarms that monitor the amplifiers performance. If a failure or fault occurs in an amplifier module, it is trans- mitted to the host system via an RS-422 interface. The amplifier is compliant to the requirements of FCC Part 24 with respect to spurious emissions (see table 1-1). Constant gain is maintained by continuously comparing active paths with passive references, and correcting for small variations through the RF feedback controls. All gain varia- tions, for example those due to temperature, are reduced to the passive reference variations. The amplifier module is comprised of: • Input amplifier • Pre-distortion amplifier • Driver amplifier • Main amplifier • Isolator 4-4.1 Input Amplifier and Predistortion Amplifier RF is fed to the input amplifier then to the predistortion amplifier where the input signal is dis- torted such that it linearizes the output of the main amplifier. All the predistortion voltages and loop voltages are controlled by a microprocessor. 4-4.2 Driver Amplifier The driver amplifier is a class AB amplifier. The amplifier operates on +26 Vdc with bias voltage controlled by the microprocessor.  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A 4-1 October 2002 NTGS86AB Installation & Service Manual 4-4.3 Main Amplifier The main amplifier is a class AB amplification stage for maximum efficiency. The RF output signal from the main amplifier is then applied to an isolator. The amplifier power performance is moni- tored by the microprocessor via the forward and reverse detectors. The final output power is typi- cally 44 dBm. The amplifier operates on +26 Vdc with gate bias voltages controlled by the micro- processor. Figure 4-1 NTGS86AB Single-Channel Power Amplifier Functional Block Diagram 4-5 Amplifier Module Cooling Each amplifier module is contained within a thermally conductive chassis which, when properly mounted on an adequate thermal surface, will provide sufficient cooling to maintain the amplifier within the specified operating temperature range. 4-6 Power Distribution Primary DC power for the amplifier is provided by the host system. The amplifier generates all the required voltages internally from the main source.  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A 4-2 October 2002

NTGS86AB Installation & Service Manual Section 5 Maintenance 5-1 Introduction This section contains periodic maintenance and performance test procedures for NTGS86AB Single-Carrier Cellular Power Amplifier module. NOTE Check your sales order and equipment warranty before attempting to service or re- pair 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. 5-2 Periodic Maintenance Periodic maintenance requirements are listed in table 5-1. Table 5-1 also lists the intervals at which the tasks should be performed. Table 5-1 Periodic Maintenance Task Interval Action Inspection: Cables and Connectors 12 Months Inspect signal and power cables for frayed insula- tion. Check RF connectors to ensure they are tight. Performance Tests No periodic maintenance is necessary beyond that recommended by the base station manufacturer. 5-3 Amplifier Module Field Replacement The NTGS86AB power amplifier module can be replaced in the field on site by a qualified techni- cian with adequate ESD protection and experience maintaining RF power amplifiers and similar equipment. To replace a power amplifier module, proceed as follows: 1. Turn off the +26 Vdc power source to that specific amplifier module. 2. Disconnect the RF INPUT, RF OUTPUT, RF SAMPLE, and 18-pin Molex connectors. 3. Remove seven (7) screws that secure the amplifier module to the heat sink. 4. Carefully remove the amplifier module from the heat sink. 5. Remove any remaining Thermstrate from the heat sink. Use alcohol or other recommended cleaning agent to achieve a clean heat sink mounting surface. NOTE Failure to completely remove old thermal grease, or the introduction of too much ther- mal grease will dramatically alter the thermal transfer process between the amplifier module and the heatsink. 6. Add Thermstrate thermal interface pad to surface of replacement amplifier, that mates with heatsink. Use just enough Thermstrate to be evenly visible on the mounting surface. 7. Install replacement in reverse order of steps 1 through 4 above.  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A 5-1 October 2002 NTGS86AB Installation & Service Manual Section 6 Troubleshooting 6-1 Introduction This section contains a list of problems and a few suggested actions that may correct the prob- lem. 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 re- pair 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 Table 6-1 lists general guidelines established to aid Field Engineers or Cell Site Technicians in the proper method of Powerwave equipment fault resolution by fault mode. Table 6-1 Troubleshooting Symptom Suggested Action SCPA Inoperative Check for proper power supply voltage. SCPA Not Enabled Verify ENABLE(+) line is high. Alarm Output is (RS-422) High Verify input RF is within specified power and frequency limits 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) 466- 1000 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.  Copyright Powerwave Technologies, Inc., October 2002. All rights reserved 044-05126 Rev. A 6-1 October 2002

Page 1 of 38 Report No.: FC02-096 POWERWAVE TECHNOLOGIES TEST REPORT FOR THE SINGLE CHANNEL AMPLIFIER, NTGS86AB FCC PART 22 AND PART 15 SUBPART B SECTION 15.109 CLASS B COMPLIANCE DATE OF ISSUE: OCTOBER 18, 2002 PREPARED FOR: Powerwave Technologies 1801 E. St. Andrew Place Santa Ana, CA 92705 PREPARED BY: Mary Ellen Clayton CKC Laboratories, Inc. 5473A Clouds Rest Mariposa, CA 95338 P.O. No.: 60553 W.O. No.: 79685 Date of test: October 8-9, 2002 Report No.: FC02-096 This report contains a total of 38 pages and may be reproduced in full only. Partial reproduction may only be done with the written consent of CKC Laboratories, Inc. The results in this report apply only to the items tested, as identified herein. Page 2 of 38 Report No.: FC02-096 TABLE OF CONTENTS Administrative Information ............................................................................................. 3 Summary of Results......................................................................................................... 4 Conditions for Compliance.............................................................................................. 4 Approvals......................................................................................................................... 4 Equipment Under Test (EUT) Description...................................................................... 5 Equipment Under Test..................................................................................................... 5 Peripheral Devices ........................................................................................................... 5 Temperature and Humidity During Testing .................................................................... 6 2.1033(c)(3) User’s Manual ............................................................................................ 6 2.1033(c)(4) Type of Emissions ...................................................................................... 6 2.1033(c)(5) Frequency Range ........................................................................................ 6 2.1033(c)(6) Operating Power ......................................................................................... 6 2.1033(c)(7) Maximum Power Rating............................................................................. 6 2.1033(c)(8) DC Voltages ............................................................................................... 6 2.1033(c)(9) Tune-Up Procedure .................................................................................... 6 2.1033(c)(10) Schematics and Circuitry Description ...................................................... 6 2.1033(c)(11) Label and Placement................................................................................. 6 2.1033(c)(12) Submittal Photos....................................................................................... 6 2.1033(c)(13) Modulation Information ........................................................................... 6 2.1033(c)(14)/2.1046/22.913 - RF Power Output .......................................................... 7 2.1033(c)(14)/2.1047(b) - Modulation - Audio Frequency Response............................. 9 2.1033(c)(14)/2.1047(b) - Modulation Limiting Response ............................................. 9 2.1033(c)(14)/2.1049(i)/22.917 - Occupied Bandwidth .................................................. 9 2.1033(c)(14)/2.1051/22.917 - Spurious Emissions at Antenna Terminal...................... 15 2.1033(c)(14)/2.1053/22.917 - Field Strength of Spurious Radiation............................. 30 2.1033(c)(14)/2.1055/ - Frequency Stability ................................................................... 33 15.109 – Radiated Emissions – Receiver/Digital ............................................................ 33 Appendix C: Customer Data............................................................................................ 37 Page 3 of 38 Report No.: FC02-096 CKC Laboratories, Inc. has received Certificates of Accreditation from the following agencies: A2LA (USA); BSMI (Taiwan); Nemko (Norway); and GOST (Russia). CKC Laboratories, Inc has received test site Registration Acceptance from the following agencies: FCC (USA); VCCI (Japan); and Industry Canada. CKC Laboratories, Inc. has received Letters of Acceptance through an MRA for the following agencies: ACA/NATA (Australia); SABS (South Africa); SWEDAC (Sweden); Radio Communications Agency (RA); HOKLAS (Hong Kong); Bakom (Swiss); BIPT (Belgium); Denmark Telestyrelsen; RvA (Netherlands); SEE (Luxembourg) SITTEL (Bolivia); and UKAS (UK). ADMINISTRATIVE INFORMATION DATE OF TEST: October 8-9, 2002 DATE OF RECEIPT: October 8, 2002 PURPOSE OF TEST: To demonstrate the compliance of the Single Channel Amplifier, NTGS86AB with the requirements for FCC Part 22 and Part 15 Subpart B Section 15.109 Class B devices. TEST METHOD: ANSI C63.4 (1992) and Part 22 FREQUENCY RANGE TESTED: 10 MHz - 10 GHz MANUFACTURER: Powerwave Technologies 1801 E. St. Andrew Place Santa Ana, CA 92705 REPRESENTATIVE: Jeffrey Dale TEST LOCATION: CKC Laboratories, Inc. 5473A Clouds Rest Mariposa, CA 95338 Page 4 of 38 Report No.: FC02-096 SUMMARY OF RESULTS As received, the Powerwave Technologies Single Channel Amplifier, NTGS86AB was found to be fully compliant with the following standards and specifications: United States ! FCC Part 22 and Part 15 Subpart B Section 15.109 Class B using: ! ANSI C63.4 (1992) method Canada ! RSS-131 (see matrix below) FCCCanadaDescription 1.1307 / 2.1093RSS 131 (3.6) / RSS 102RF Exposure Requirements 22.917 / 2.1049RSS 131 (5.1)Occupied Bandwidth N/ARSS 131 (5.1)Passband Gain requirements 22.913 / 2.1046RSS 131 (5.2) 1,2,3 RF Power Output Inter-modulation TestRSS 131 (5.3)Amplifier Non-Linearity 22.917RSS 131 (5.4)Field Strength of Spurious Radiation N/ARSS 131 (5.5)Frequency Stability for Band Translators CONDITIONS FOR COMPLIANCE No modification…

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Direct Connect Radiated Emissions - Front View Radiated Emissions - Back View