User's Manual

044-05210 Rev. A 1-1
Chapter 1
Product Description
1.1 Introduction
This manual contains information and procedures for the installation, operation, and maintenance of
the EHP19 Integrated Power Transceiver (IPT).
1.2 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:
• Chapter 1 - Product Description
• Chapter 2 - Installation
• Chapter 3 - Operation
• Chapter 4 - Maintenance
• Chapter 5 - Specifications and Drawings
1.3 Functional Description
The IPT is a high efficiency RF single channel power amplifier with an internal analog pre-distorter for
use with the Radio Base Station (RBS) digital pre-distorter system for RF output linearity. The IPT has
an operational bandwidth of 60 MHz from 1930 MHz to 1990 MHz producing a typical output of 60.2
watts (47.8 dBm). The IPT is shown in
Figure 1-1. Detailed functional and physical specifications for
the IPT are listed in Chapter 5.
1.3.1 RF Interface
The IPT RF interfaces consist of the TX OUT port located on the top of the IPT front panel and the
RX0 and RX1 ports located on the bottom of the IPT front panel.
1.3.2 Main Transceiver
The following circuits are part of the main transceiver section.
1.3.2.1 Customer Interface/CPRI Input
The incoming serial data stream from the customer interface (DRIC) front panel connector is applied
to a Serialiser-Deserialiser (SerDes), converted into a parallel format and decoded. The customer
interface also includes processing of the frame alignment, byte alignment and chip alignment,
including delay adjustment. A clock acts as the frequency reference for the entire transmitter. The
clock is extracted from the incoming signal using a phase locked loop (PLL). There are two outputs