User's Manual

G3L-2129-140 MCPA Introduction
044-05369 Rev A 1-1
Chapter 1
Product Description
Introduction
This manual contains information and procedures for the installation, operation, and maintenance of the
G3L-2129-140 Multi-Carrier Power Amplifier (MCPA).
Scope of Manual
This manual is intended for use by service technicians familiar with similar types of equipment. It contains
service information required for the equipment described and is current as of the printing date. Changes which
occur after the printing date may be incorporated by a complete manual revision or alternatively as additions.
The manual is organized into the following chapters:
Product Description
The MCPA shown in Figure 1-1 MCPA Front and Rear Views is a linear, feed-forward multi-carrier power
amplifier that operates in a 60 MHz frequency band from 2110 MHz to 2170 MHz with an instantaneous
bandwidth of 45 MHz. The instantaneous bandwidth is the maximum frequency band in which any two or more
signals can occupy. The instantaneous bandwidth of the MCPA is set automatically.
The MCPA is modular in design and ideally suited for use in CDMA, W-CDMA, and LTE base stations. The
MCPA provides a gain of 63 dB to supply a 140 watt output. Refer to Figure 1-2 MCPA Functional Block
Diagram for the MCPA functional block diagram. Refer to Chapter 5 for the MCPA specifications.
Functional Description
The MCPA is a self-contained module typically operated in parallel with other identical MCPAs as part of a
subrack assembly.
The MCPA consists of the following major functions:
❑ Preamplifier
❑ Main and error amplifiers
❑ Feed-forward loop control circuits
❑ Pilot tone generator
❑ Controller
Chapter 1 - Product Description
Chapter 2 - Controls and Indicators
Chapter 3 - Installation
Chapter 4 - Maintenance
Chapter 5 - Specifications
DRAFT