Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Paradigm Manuals
  4. Amplifier
  5. MAF800-100S
  6. User manual

Paradigm MAF800-100S User Manual

Multi-carrier power amplifier
Hide thumbs

Advertisement

Quick Links

Download this manual
REPORT
RC055097/28116
APPENDIX A
SERVICE/OPERATING MANUAL

Advertisement

loading
Need help?

Need help?

Do you have a question about the MAF800-100S and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Paradigm MAF800-100S

Summary of Contents for Paradigm MAF800-100S

  • Page 1 REPORT RC055097/28116 APPENDIX A SERVICE/OPERATING MANUAL...
  • Page 2 MAF800-100S MULTI-CARRIER POWER AMPLIFIER USER MANUAL...

  • Page 3: Table Of Contents

    Table Of Contents Page Section 1 General Description ......................1 Section 2 Specifications ........................2 Section 3 Multi-Carrier Power Amplifier Principals of Operation............3 Principals of Operation ......................4 Principals of Operation ......................5 Principals of Operation…………………………………………………….6 Section 4 Operating Instructions......................7 Operating Instructions………………………………………………………8 Section 5 Installation Instructions......................9 Installation Instructions......................10 Installation Instructions......................11...

  • Page 4: General Description

    Section 7. Troubleshooting 1.2 General Description The MAF800-100S is a linear, feed forward power amplifier that operates in the 25 MHz frequency range from 869 MHz to 894 MHz. The average output power of the amplifier is 100 Watts average AMPS, CDMA, CDMA 2000, 1xEV-DO, GSM, TDMA, and EDGE.

  • Page 5: Specifications

    Section 3 Principals of Operation 3.1 Introduction This section contains the functional description of the MAF800-100S multi-carrier power amplifier. 3.2 RF Input Signal The maximum composite input power shall not exceed – 4 dBm. The reference source signal shall not exceed the base station manufacture minimum requirements for intermodulation distortion.
  • Page 6 3.4 Amplifier Functional Description The MAF800-100S amplifier is a linear, feed-forward power amplifier that operates in the 25 MHz frequency band from 869 MHz -894 MHz. The amplifier is designed to operate in an instantaneous bandwidth of 25 MHz. Each amplifier is a self-contained plug in module and is functionally independent of the other amplifier module.
  • Page 7 MAF800-100S Block Diagram...
  • Page 8 The main amplifier employs class AB amplification for maximum efficiency. The error amplifier and feed forward loops are employed to correct signal non-linearity introduced by the class AB main amplifier. The error amplifier operates in class AB mode. The RF input signals are amplified by a preamp and coupled to an attenuator and phase shifted by 180 degrees and amplified in the pre-main amplifier.

  • Page 9: Operating Instructions

    4.2 Function of Amplifier Module Controls Primary +27 Vdc power for the MAF800-100S amplifiers is applied via the 50-amp circuit breaker on the front panel of the amplifier. A reset switch is located below the LED on the front panel. This switch resets the amplifier module in the event of a minor alarm.
  • Page 10 4.3 Alarm Definition ALARM CATEGORY MCPA MCPA CONDITION MODULE DISABLE SIGNAL Over PWR Critical Disable High MCPA module output power > 150 Watts Over PWR Critical Disable High Input power > - 4 dBm High TEMP Minor Enable High temperature detected High TEMP Critical Disable...
  • Page 11 This section contains unpacking, inspection, installation instructions and recommendations for the MAF800-100S MCPA. It is important that the user perform the following tasks correctly and in good faith. Carefully read all materials in this section prior to equipment unpacking or installation.
  • Page 12 Circuit breakers should be thermal type, capable of handling the anticipated in rush current. 5.3 Air Conditioning Each MAF800-100S MCPA will generate approximately 1900 BTU of heat. When using more than one amplifier it is recommended that a thermal analysis be performed. Ensuring proper cooling will extend the Mean Time Before Failure of the unit.

  • Page 13: Installation Instructions

    CAUTION Before applying power, make sure that all connectors to the MAF800-100S are secure. Make sure that the input and output of the amplifier is terminated to 50 ohms. Do not operate the system without a load attached.

  • Page 14: Maintenance

    5. Connect external ALARM interface to external summary alarm board in host radio base station. 6. Before installing the MAF800-100S MCPA into the sub-rack, inspect the 21-pin-D-sub combo connector on the rear of each amplifier. Verify that all pins are straight, no pins are recessed, and that the alignment shield is not bent.
  • Page 15 Check RF connectors ensure connectors are tight Annual performance test as outlined in Performance Tests 12 months paragraph 6.4 Inspect for debris. Remove dust with soft Clean Fans/Heat Sinks 3 months cloth, brush or vacuum cleaner. 6.3 Test Equipment Required for Test Test equipment required to test the amplifier is listed in table 6-2.
  • Page 16 Table 6-2 Test Equipment Required Nomenclature Manufacturer Model Network Analyzer Agilent 8753 ET Spectrum Analyzer Agilent 8560E Power Meter Agilent E4418B Power Meter/Sensor Agilent 437B / 8481A Signal Generator/ESG Agilent E4432B Directional Coupler Agilent 778D Attenuator Weinschel Corp 53-30-34 Attenuator Narda 766-20 6.4 Performance Test...
  • Page 17 RES BW (100 kHz) Video BW (100 kHz) Measure IMD and record data on Table 6-3. 6.7 Gain Test Disconnect spectrum analyzer from the MAF800-100S. Connect Network Analyzer to MCPA. Set Network Analyzer as follows: Normalize Network Analyzer for gain and return loss.
  • Page 18 Table 6-3 MAF800-100S MCPA Test Data Sheet Date_________________________ Module S/N___________________ TEST CONDITIONS: Load and Source Impedance: 50 Ohms VSWR: < 1.2:1 Supply Voltage: +27 Vdc Temperature: Room Temperature TEST SPECIFICATION DATA Spurious Emission Voltage = +27 Vdc -57 dBc RF Gain...
  • Page 19 6.1 Field Replacement of the MAF800-100S The MAF800-100S MCPA can be replaced in the field on the site by a qualified technician with experience maintaining RF power amplifiers and radio equipment. To replace a power amplifier module, proceed as follows: Set ON/OFF switch on front of amplifier to OFF position.

  • Page 20: Troubleshooting

    Troubleshooting Shooting 7.1 Introduction This section contains a list of problems that may occur. Paradigm Wireless Systems has suggested corrective action that may correct the problem. If the suggested corrective action does not eliminate the problem, please contact your Paradigm Wireless Systems representative for further instructions.