Service Manual

GSM-204-323
RF equipment detail
31st Oct 01
Technical Description: Horizon macro outdoor
68P02902W02-A
CONTROLLED INTRODUCTION
Tech. 5–1
RF equipment detail
Overview of RF
equipment
This chapter describes the functional operation of the Radio Frequency (RF)
modules used in the cabinet.
The RF equipment provides a transmit and receive path between the Mobile
Station (MS) and the cabinet transceiver. All descriptions are presented at a
block diagram level.
RF modules
The following RF modules are described in this chapter:
 Compact Transceiver Unit (CTU).
 Sectorized Universal Receiver Front-end (SURF) module (for receive
path), both single and dual band variants.
 Several types of transmit block, with the generic name of Tx block. Tx
blocks are used for various configurations of the transmit path, depending
on the number of antennas, transceivers and functionality.
RF general information and loopback test function
The following additional information is presented in this chapter:
 General definition of transmit and receive functions in this RF equipment
detail section.
 An RF overview and RF test function description in the next section.
 An explanation of CTU frequency hopping in a section immediately after
the CTU section.
These sections are intended to assist the reader in understanding the
information on the RF modules.
RF
specifications
All equipment meets or exceeds ETSI regulations. Frequency information is
listed in the Specifications part of this manual.