Powerwave Technologies MCA9129-90-A Installation & Service Manual

Section 1 General Description

1-1 Introduction
This manual contains information and procedures for installation, operation, and maintenance of
Powerwave's MCA9129-90MCA9129-90-A
ized into six sections as follows:
Section 1. General Description
Section 2. Installation
Section 3. Operating Instructions
Section 4. Principles of Operation
Section 5. Maintenance
Section 6 Troubleshooting
1-2 General Description
The MCA9129-90MCA9129-90-A
operates in the 25 MHz frequency band from 869 MHz to 894 MHz. The amplifier can simultane-
ously transmit multiple frequencies, with better than -65 dBc third order intermodulation distortion
(IMD) at 100 watts output, or –60 dBc IMD at 120 watts output. It is designed for use in an ampli-
fier system that is modular in design, and is ideally suited for use in AMPS/TDMA/CDMA base
stations. When used in a subrack employing four
system offers up to 360 watts output at
–65dBc IMD performance level (430 watts output at –60dBc IMD). The plug-in Model
90MCA9129-90-A amplifier modules can each provide 120 watts of power and function com-
pletely independently of each other. The amplifier modules are designed for parallel operation to
produce high peak power output and backup redundancy for remote applications. All solid-state,
the system is designed to provide trouble-free operation with minimum maintenance. The sys-
tem's modular construction and unique and highly effective LED-based operational status and
fault indicators help minimize downtime. The turn-on and turn-off sequences of voltages are fully
automatic, as is overload protection and recycling. Inadvertent operator damage from front panel
manipulation is virtually impossible.
Each amplifier module has a status connector that allows the host system to monitor the amplifier
module performance. The front panel of each amplifier module has unit level status/fault indica-
tors and an RF on/off/reset switch. Primary power for the amplifier is +27 Vdc. Cooling for each
plug-in amplifier module is provided by three fans, two mounted on the front and one on the rear
of the module. The fans draw outside air through the front of the module and exhaust hot air out
through the rear of the module.
1-3 Functional and Physical Specifications
Functional and physical specifications for the amplifier are listed in tables 1-2 and 1-3.
1-4 Equipment Changes
Powerwave Technologies, Inc. reserves the right to make minor changes to the equipment, in-
cluding but not necessarily limited to component substitution and circuitry changes. Changes that
impact this manual may subsequently be incorporated in a later revision of this manual. To that
end, we ask that you, our customer, share with us any information acquired in field situations that
would enhance this manual.
Ó Copyright Powerwave Technologies, Inc., July 2001. All rights reserved
All specifications are subject to change without notice. Contact the factory for complete performance data.
044-05060 Rev. AC
MCA9129-90-A
multicarrier cellular amplifier. The manual is organ-
(see figure 1-1) is a linear, feed-forward power amplifier that
MCA9129-90MCA9129-90-A
1-1
Installation & Service Manual
amplifiers, the
MCA9129-
July 2001November 2002