Paradigm MAF800-100S User Manual
REPORT RC055097/28116
APPENDIX A
SERVICE/OPERATING MANUAL
MAF800-100S
MULT I-CARRIER
POWER
AMPLIFIER
USER MANUAL
Ta ble Of Con tents
Page
Section 1 No.
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 Instructio ns...........................................................................................................7
Operating Instructio ns………………………………………………………8
Section 5
Installation Instructio ns.........................................................................................................9
Installation Instructio ns........................................................................................................10
Installation Instructio ns........................................................................................................11
Section 6
Maintenance.........................................................................................................................12
Maintenance.........................................................................................................................13
Maintenance.........................................................................................................................14
Maintenance.........................................................................................................................15
Maintenance.........................................................................................................................16
Section 7
Troubleshooting……………………………………………………………17
Section 1
Am plifier System Descrip tion
1.1 Introduction
This manual contains information and procedures for installation, operation, and maintenance of Paradigm
Wireless Systems MAF800-100S multi-carrier cellular amplifier. This manual is organized into the
following sections:
Section 1. Amplifier System Description
Section 2. Specifications
Section 3. Principals of Operation
Section 4. Operating Instructions
Section 5. Installation
Section 6. Maintenance
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. The amplifier is designed to operate in a
maximum of two continuous modulations or a total instantaneous bandwidth of 25 MHz. The amplifier can
simultaneously transmit multiple frequencies, with a better than –13 dBm third order intermodulation
distortion. The amplifier is designed and suited for use in CDMA, TDMA, EDGE and GSM radio base
stations. A sub-rack is employed to combine the outputs of up to (4) MAF800-100S amplifiers. Each plugin module operates in parallel to produce a high peak output power and fail safe redundancy for trouble free
operation with minimum maintenance. A multi-color LED detects when a fault condition has occurred
within the amplifier. The LED will turn from GREEN to RED during an amplifier fault condition.
Each amplifier has a status connector that allows the host system to monitor the amplifier module
performance. Monitoring of the amplifiers is done through the D-subminiature connector on the back of the
MAF800-100S amplifiers. The front panel of the MAF800-100S amplifier has an ON/OFF circuit breaker.
Primary +27 Vdc power for the MAF 800-100S amplifiers is provided through the sub-rack assembly.
The sub-rack contains the fan assembly for cooling each amplifier. Cooling fans are used to pull air through
the heat sinks. Air movement across the heat sinks dissipates the heat generated by the amplifiers. Constant
airflow ensures the amplifiers performance to specifications.
Section 2
Gain Variation over Temperature 0.3 dB
MAF800-100S Electrical Specification
Parameter Specification
Frequency 869-894 MHz
RF Gain 58 dB
Gain Flatness 0.5 dB
Intermodulation Distortion
≤
-13 dBm
1
Out of Band Spurious
Input Power -4 dBm
Output Power 100 Watts
Modulation Type AMPS, CDMA, CDMA 2000, TDMA, EDGE, GSM, 1x
Operating Instantaneous Bandwidth 25 MHz
Input Return Loss
Output Return Loss
Output Protection Mismatched Protected
Duty Cycle Continuous
Vd c Input P o wer +2 7 Vd c
Operating Current 24 amps per amplifier
≤
-13 dBm
EV-DO
≥ 15 dB
≥ 15 dB
MAF800-100S Environmental Specifications:
Parameter Specification
Operating Temperature
Storage Temperature
Operating Humidity 5%- 95% Relative Humidity (Non-condensing)
Storage Humidity 5%-95% Relative Humidity (Non-condensing)
RF Input / Output Connector D-Sub, Hybrid, Plug-in Type RF Connector: PKZ
Status / Alarm / Control / DC Input Connector 21 Pin D-Subminiature Combo Connector
Dimensions
Weight
0° C. to 50° C.
-40° C. to + 80° C.
26-0020 series straight plug (Phoenix Co.)
Section 3
Principals of Operati on
3.1 In troduction
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. For proper loop
balance, the out of band components of the input signal shall not exceed –40 dBc. The input VSWR should
be 2:1 maximum
3.3 RF Output Load
The load impedance should be equal to or better than 1.5:1 in the operating band for good power transfer to
the load. If the amplifier is operated into a filter, it will maintain its distortion characteristics outside the
signal band even if the VSWR is infinite. Provided the reflected power does not exceed one-watt. A
parasitic signal of less than one-watt incident on the output will not cause distortion at a higher level than
the normal forward distortion
2
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. The amplifier modules are designed for parallel operation to achieve high peak
power output, and for redundancy in unmanned remote locations. Each amplifier in the system can
simultaneously transmit multiple carrier frequencies, at an average total power output of 100 Watts, with
better than –13 dBm intermodulation distortion.
All phase and gain corrections are performed on the signal (s) in the individual amplifier module. Each
amplifier module has an alarm board that monitors the amplifier performance. If a failure or fault occurs in
the amplifier module a multi-color LED will change from GREEN to RED. This will be displayed on the
front of the individual amplifier front panel.
3.5 MAF800-100S Amplifier Module
The amplifier module has an average output of 100 Watts power with intermodulation products suppressed
to better than -13 dBm. The amplifier provides an amplified output signal with constant gain and phase by
adding approximately 25 dB of distortion cancellation on the output signal. Continuously comparing active
paths with passive references, and correcting for small variations through RF feedback control maintain
constant gain and phase. The amplifier module is comprised of:
Preamplifiers
Main Amplifiers
Error Amplifier
Two feed-forward loops with phase–shift and gain controls
DC/DC power regulator
Alarm monitoring, control and LED display lamp
3
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