User's Manual
044-05207 Rev A 1-1
Chapter 1
Product Description
Introduction
This manual contains information and procedures for installation, operation, and maintenance of the Rack
Mount Radio module as part of the Nexus FT Rack Mount Repeater. In this manual, the Nexus FT Rack Mount
Radio is referred to as the RMR. The manual is organized into chapters as follows:
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.
Overview
The RMR is a repeater designed to be part of a Distributed Antenna System (DAS). The components are
mounted on a 19” rack and are intended for use in an in-door, temperature controlled environment.
As part of a DAS, the RMR extends coverage into uncovered areas in wireless mobile systems such as base
station fringe areas, tunnels, convention centers, airports, and buildings. It receives, amplifies, and transmits
signals to/from a Base Transceiver Station (BTS) and to/from Mobile Stations (MS) with both directions being
served simultaneously.
The RMR unit is a dual wide band, bi-directional, RF amplifier with two separate donor ports and a common
(duplexed) service port per band. It connects to an Optical to RF Distribution Unit (ORD) where RF signals are
combined or split and converted to an optical signal in the Uplink direction. In the Downlink direction, optical
signals are converted to RF and split to RF outputs. Two separate full duplex fibers handle signal transport
between the BTS Master Unit and the ORD. The DL signal and the UL signal combine onto one optical fiber
through a Wavelength Division Multiplexer (WDM). Wide band 4-way combiners handle RF splitting and
combining. The UL ouput signal is connected to the ORD via RF coax cable, converted to light, and sent via
fiber toward the BTS.
A Wireless Portal module distributes the DL/UL signals to/from the DAS.
The RMR is microprocessor controlled with alarm and operational status LEDs visible on the front. Cooling is
provided through forced air fans. Operational parameters, such as gain and power levels are set using a PC
running Powerwave OM-Online software which communicates with the RMRs either locally or remotely via
modem. Remote operation can be accomplished via PSTN or a GSM net. The Operation and Maintenance
System (OMS) provides for Network Operations Center (NOC) configuration and alarm monitoring.
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Chapter 1- Product Description
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Chapter 2- Controls and Indicators
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Chapter 3- Installation
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Chapter 4- Maintenance
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Chapter 5- Specifications