User's Manual

G3S-800-140 Installation & Service Manual
044-05095 Rev. A 1-1 February 2001
Section 1 General Description
1-1 Introduction
This manual contains information and procedures for installation, operation, and maintenance of
Powerwave’s G3S-800-140 multicarrier cellular amplifier. The manual is organized into six sec-
tions 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 G3S-800-140 (see figure 1-1) is a linear, feed-forward power amplifier that operates in the 25
MHz frequency band from 869 MHz to 894 MHz. The amplifier can simultaneously transmit multi-
ple frequencies, with better than -60 dBc third order intermodulation distortion (IMD). It is de-
signed for use in an amplifier system that is modular in design, and is ideally suited for use in
AMPS/TDMA/CDMA/CDPD/W-CDMA base stations. The plug-in Model G3S-800-140 amplifier
modules can each provide 140 watts of power and function completely independently of each
other. The amplifier modules are designed for parallel operation to produce high peak power out-
put and backup redundancy for remote applications. All solid-state, the system is designed to
provide trouble-free operation with minimum maintenance. The system'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.
The 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 four fans, two mounted on the front and two 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 table 1-2.
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.