Powerwave Technologies 5JS0120 Users manual

COVERAGE SOLUTIONS

INSTALLATION AND SERVICE MANUAL

044-05326 REV. B JULY 2010

NEXUS FT RACK MOUNT RADIO

© 2010 Powerwave Technologies Incorporated. All rights reserved.

Powerwave Technologies and the Powerwave logo are registered trademarks.

Powerwave Technologies Inc. reserves the right to make changes to documentation and equipment, including but not limited to com­ponent substitution and circuitry changes. Changes that impact this document may be subsequently incorporated in a later revision
of this document.

This Powerwave product is designed to operate within the Normal Operating (typical operating) ranges or conditions specified in this
document. Operation of this equipment beyond the specified ranges in this document may cause (1) spurious emissions that violate
regulatory requirements; (2) the equipment to be automatically removed from service when maximum thresholds are exceeded; or
(3) the equipment to not perform in accordance with its specifications. It is the Operator's responsibility to ensure this equipment is
properly installed and operated within Powerwave operating specifications to obtain proper performance from the equipment and to
comply with regulatory requirements.

The rated output power of a Nexus FT is for multiple carriers. As long as the composite power does not exceed the rated power
(20W for North America), derating is not required for multiple carriers. For situations where regulatory requirements require reduced
interference to adjacent band users, the rating would have to be reduced by 3 dB. This power reduction is to be by means of input
power or gain reduction and not by an attenuator at the output of the device. Input power is rated at 115/230VAC, 50/60Hz, and
should be protected based on the power and fuse specifications in Chapter 5 of this manual. Power strips should, at a minimum,
conform to this requirement to prevent equipment damage and possible overload.

Federal Communications Commission (FCC)

This device complies with the technical standards governing mobile radio devices in accordance with FCC Rules. This device is
intended to facilitate the reception and transmission of mobile radio devices in the cellular, PCS or other mobile services, and its
operation by end users or others requires carrier consent under FCC rules. This equipment has been tested and found to comply
with the limits for a Class A digital device, pursuant to CRF47 part 15 of the FCC rules. This equipment is also certified to CRF47 part
22 (cellular), part 24 (PCS) and part 90 (iDEN800 and iDEN900) of the FCC Rules depending on the band of operation. Changes or
modifications not expressly approved by Powerwave Technologies, Inc. for compliance could void the user’s authority to operate this
equipment. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own
expense.

Industry Canada

The measured Canadian RF output power for the RH905022/13B is 46.3dBm.

European Requirements

The Powerwave Nexus FT apparatus introduced in EU markets are certified to ESTI EN 300 609-4 (GSM900 and DCS1800) and
ESTI EN 301 908-11 (WCDMA).

Powerwave Technologies Inc., 1801 East St. Andrew Place, CA 92705 Santa Ana, USA.
Phone [phone] – Fax [phone] – Internet www.powerwave.com

Revision Record

Revision Letter Date of Change Reason for Change

Rev A September 2008 Initial release

Rev B July 2010 Updated manual to show new FT RMR product

044-05326 Rev B iii

Nexus FT RM RMR

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iv

044-05326 Rev B

Nexus FT RM RMR Table of Contents

TABLE OF CONTENTS

Warning, Cautions, and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Human Exposure to RF Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Repeater Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Installation and Maintenance of Antenna Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Radiation Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

Electrostatic Discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

Chapter 1 - Product Description

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Cabinet Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Rack Mount Radio module (RMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Chapter 2 - Indicators

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Chapter 3 - Installation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

RMR Cabinet Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Rack Mounting the RMR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Downlink and Uplink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Service and WLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Main Power and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Initial Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Chapter 4 - Maintenance

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Clearing Alarm Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Field Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Fan Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

NetWay Manager (NWM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Return For Service Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Obtaining an RMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Repackaging for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Chapter 5 - Specifications

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

044-05326 Rev B v

Table of Contents Nexus FT RM RMR

List of Figures

1-1 Powerwave Nexus FT RM rack- fully equipped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1-2 Nexus FT Rack Mount Radio (RMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2-1 External Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

3-1 Downlink and Uplink Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3-2 RMR Service and WLI Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3-3 RMR Main Power and Grounding Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

4-1 Fan Assembly Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-2 Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

List of Tables

3-1 Downlink and Uplink Connection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3-2 RMR Service and WLI Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3-3 RMR Main Power and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3-4 Initial Status Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

4-1 Recommended Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 Alarm Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-3 Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

5-1 RMR Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

vi 044-05326 Rev B

Preface

Warning, Cautions, and Notes

Warnings, Cautions, and Notes are found throughout this manual where applicable. The associated icons in
warnings and cautions are used to quickly identify a potential condition that could result in the consequences
described below if precautions are not taken. Notes clarify and provide additional information to assist the
user.

WARNING: The warning symbol means danger. You are in a situation that could cause bodily

injury or death. Before you work on any equipment, be aware of the hazards involved with elec-

trical and RF circuitry and be familiar with standard practices for preventing accidents.

CAUTION: The caution symbol means the potential exists for equipment damage or loss of

data.

NOTE: Notes contain helpful suggestions or references to material not covered in the document.

Safety

Any personnel involved in installation, operation, or service of units included in a Powerwave repeater
system must understand and follow the points below:

❑ Powerwave Nexus FT Rack Mount Radios (RMR) are designed to receive and amplify signals from

one or more base stations and retransmit the signals to one or more mobile stations. They also act
the other way round, that is to receive signals from one or more mobile stations, then amplify and
retransmit the signals to the base stations. Powerwave Nexus FT RMR systems must be used
exclusively for this purpose and nothing else.

❑ Units supplied from the mains must be connected to grounded outlets and in conformity with the local

prescriptions.

❑ Power supply units supplied from the mains contain dangerous voltage that can cause electric shock.

Disconnect the mains prior to any work in such a unit. Local regulations are to be followed when
servicing such units. Only authorized service personnel are allowed to service units while the mains
are connected.

❑ All RF transmitting units, including Nexus FT RMRs, will generate radio signals and thereby give rise

to electromagnetic fields that may be hazardous to the health of any person who is extensively
exposed close to an antenna.

Human Exposure to RF Radiation

Safe distances must be kept when working around antennas. The following paragraphs describe the
cautions to be aware of during the installation and maintenance of antenna systems and how to calculate
safety distances needed for RF radiation at different antenna power and frequencies.

Repeater Antennas

To be able to receive and transmit signals, a repeater is connected to a donor antenna directed towards the
base station and a service antenna directed towards the coverage area. A fiber optic cable from the base
station might, however, be substituted for the donor antenna.

Installation and Maintenance of Antenna Systems

Installation and maintenance of all antenna systems must be performed with respect to the radiation
exposure limits for public areas. The antenna radiation level is affected by the output power, antenna gain,
and transmission devices such as cables, connectors, splitters and feeders. Also have in mind the system
minimum coupling loss, typically between 25 dB and 35 dB, is determined by a standard with the purpose
to protect base stations from noise and other performance dropping effects.

044-05326 Rev B vii

Electrostatic Discharge (ESD) Nexus FT RM RMR

Radiation Exposure

The World Health Organization (WHO) and International Commission on Non-Ionising Radiation Protection
(ICNIRP) have determined recommendations for radiation exposure. ICNIRP recommends not to exceed
the following radiation power for public exposure:

Frequency Radiation power

800/900 MHz 4.5W/m²
1800/1900 MHz 9.0W/m²
2100 MHz 10.0W/m²

For antennas larger than 20cm the maximum radiation power can be calculated by using the following
formula:

S = Radiation power in W/m²
P = Output power in W
r = Distance between antenna and human in meters

S= P/(4

πr

2

)

Electrostatic Discharge (ESD)

ESD can severly damage essential parts of the equipment if not handled carefully. Parts on
Printed Circuit Board Assemblies (PCBA) as well as other parts in the equipment are
sensitive to ESD. Never touch the PCBA or uninsulated conductor surfaces unless
absolutely necessary.

If you must handle the PCBAs or uninsulated conductor surfaces, use ESD protective
equipment or first touch the chassis with your hand. Never let your clothes touch PCBAs or
uninsulated conductor surfaces and always store PCBAs in ESD-safe bags.

viii 044-05326 Rev B

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:

❑

Chapter 1- Product Description

❑

Chapter 2- Indicators

❑

Chapter 3- Installation

❑

Chapter 4- Maintenance

❑

Chapter 5- Specifications

Scope of Manual

This manual is intended for use by service technicians familiar with similar types of equipment. It contains
required service information for the RMR 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 in. rack and are intended for use in an indoor, 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).

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 aFiber Base Distribution Unit (FBU) that combines, splits and
converts RF signals to an optical signal in the Uplink (UL) direction. In the Downlink (DL) direction, the FBU
converts optical signals to RF signals and splits the signal to RF outputs. Two separate full-duplex fibers handle
signal transport between the BTS Master Unit and the FBU. See the Fiber Base Unit Installation and Service
Manual (part number 044-05348) for more details. The DL signal and the UL signal combine onto one optical
fiber through a Wavelength Division Multiplexer (WDM). Wideband 4-way combiners handle RF splitting and
combining. The UL output signal is connected to the FBU 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 are set using a PC running Powerwave OM-Online
software which communicates with the RMRs through the FBU or through a system solution. Remote operation
can be accomplished via Public Switched Telephone Network (PSTN) or a GSM net. The Operation and
Maintenance System (OMS) provides for Network Operations Center (NOC) configuration and alarm
monitoring.

044-05326 Rev B 1-1

Rack Mount Radio module (RMR) Nexus FT RMR

Typical RMR position

Cabinet Design

The Nexus FT RMR modules are intended to be mounted in a 482 mm (19 in) cabinet at least 600 mm (23 in)
deep, similar to the one shown Figure 1-1.I

Figure 1-1 Powerwave Nexus FT RM rack- fully equipped

Rack Mount Radio module (RMR)

RMRs can handle multiple carriers over a wide band. The cabinet can be equipped with up to four RMRs.

Figure 1-2 Nexus FT Rack Mount Radio (RMR)

1-2 044-05326 Rev B

Chapter 2

Red

Amber

Indicators

Introduction

This chapter contains descriptions of the controls, indicators, and connectors for the Nexus FT RMR.

Indicators

Figure 2-1 External Indicators

The LEDs, shown in Figure 2-1, provide easy identification of a fault in the system. The amber operation LED
lights up approximately 15 seconds after the main power is switched on. When the LED is steady, the RMR is
ready for operation. The red alarm LED indicates a system error alarm when flashing and a critical alarm
when steady.

044-05326 Rev B 2-1

Indicators Nexus FT RMR

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2-2 044-05326 Rev B

Chapter 3

Installation

Introduction

This chapter contains unpacking, inspection, and installation instructions for installing and powering up the
Nexus FT RMR.

Site Survey

Powerwave recommends that a site survey be performed prior to equipment ordering or installation.
Performing a detailed site survey reduces or eliminates installation and turn-up delays. Pay particular
attention to power plant capacity, cooling needs, floor space, and RF/DC cabling/breaker requirements.
Cabinet dimensions and weights are listed in Chapter 5.

Unpacking and Inspection

This equipment has been operated, tested, and calibrated at the factory. Carefully open the container to
remove the equipment. Retain all packing material so it can be reassembled in the event the unit must be
returned to the factory. Perform the following steps:

❑ Visually inspect equipment for damage that may have occurred during shipment. If possible, in the

presence of the delivery person, if possible.

❑ Check for evidence of water damage, bent or warped chassis, loose screws or nuts, or extraneous

packing material in connectors.

If the equipment is damaged, file a claim with the carrier once the extent of the damage is assessed.

If the equipment must be returned to the factory, please contact the factory for a Return Material Authorization
(RMA). See Chapter 4.

RMR Cabinet Location

The RMR is designed for use in an indoor, temperature controlled environment mounted in a 19 inch cabinet.
Ensure the rear of the unit is supported properly.The RMR should be placed in an area that is free of
obstructions, easily accessible, and allows for proper air-flow and ventilation.

Rack Mounting the RMR

1. Set the RMR in the required position.

2. Align the mounting holes with the holes on the rack.

3. Insert the four mounting screws and tighten until secure.

4. Ensure the rear of the unit is supported properly.

044-05326 Rev B 3-1

Connections Nexus FT RMR

Fiber cable

Service 2

Service 1

Connections

Downlink and Uplink

RF and fiber cable connections should be verified both internally and externally before powering up the
equipment. Verify these connections with the as-built drawings and documents for your specific system
configuration. Table 3-1 and Figure 3-1 show the steps to connect the RMR module to the Nexus Fiber Base
Unit (FBU) at the head end.

Table 3-1 Connection Procedure

Step Action

1 Connect a fiber cable between the RMR fiber terminal and a head end device, such as the FBU.

2 Connect an RF cable between the customer’s system and the Service 1 and Service 2 ports on the

RMR.

Figure 3-1 RMR to FBU and Service 1/2 Connections

3-2 044-05326 Rev B

Nexus FT RMR Connections

Power cable

Ground Cable

Main Power and Grounding

Local regulations need to be followed for the main power connection. Nexus FT RMRs are approved in
accordance with EN and UL/cUL regulations. This is, however, only valid if a classified power cord is used.
For the Nexus FT RMR to meet these regulations you must select one of the following classified and
approved cord types:

❑ EN – H 05 W5 - F HMR
❑ UL – AWM Style 2587
❑ CSA– AWM 1 A/B 11 A/B

WARNING: For Nexus FT RMRs supplied from the main power source, the main outlet must be
grounded.

Table 3-2 RMR Main Power and Grounding

Step Action

1 Connect a power cable between the RMR and an appropriate power supply.

2 Connect a ground cable between the ground terminal on the RMR and an appropriate ground at the

installation site.

Figure 3-2 RMR Main Power and Grounding Connections

044-05326 Rev B 3-3

Commissioning Nexus FT RMR

Commissioning

Before proceeding, carefully read the Safety section and check all connections made during the installation.
Ensure cables are properly tightened and not damaged.

The RMR can be configured locally with OM-Online by connecting a standard serial cable from the COM port
on the PC to the P31 PC port (RS-232) located on the front of the RMR. Details on using OM-Online are
described in the OM-Online User Manual - Connecting a PC for Local Access

Initial Startup

To complete the initial start-up of the Nexus FT RMR, follow the steps listed in Table 3-4.

Table 3-3 Initial Statup Procedure

Step Action

1 Turn main power on.

2 Check the LEDs on the RMR. Refer to Figure 2-1 in Chapter 2 for correct power up indications.

NOTE: When optimizing RMRs, offset the UL gain 20 dB less than the DL gain as a starting point.

Always monitor the UL pass bands for noise levels and/or IMDs when optimizing and commission­ing.

3-4 044-05326 Rev B

Chapter 4

Maintenance

Introduction

This chapter contains periodic maintenance and performance test procedures for the Nexus FT RMR.

Periodic Maintenance

Periodic maintenance requirements are listed in Table 4-1, as well as the intervals at which the tasks should
be performed.

Table 4-1 Recommended Periodic Maintenance

Task Interval Action

Inspection of cables
and connectors

Clean cooling fans 12 months Clean any dirt or debris that may potentially block air flow.

Clean equipment Clean as required depending on operating environment.

12 months Inspect power, RF, and Fiber cables for signs of damage or wear

(frayed insulation, cracks, punctures, etc.) Check connections to be
sure they are tight.

Optional Perform cable sweeps.

Troubleshooting

The sections that follow contain a list of problems that could occur and a few suggested actions that might
correct each problem. If the suggested corrective action does not eliminate the problem, please contact your
Powerwave field representative or help line for further instruction.

Clearing Alarm Faults

Table 4-2 lists the alarms that can be generated in the Nexus FT RMR. Critical, Error, and Warning alarms are
sent automatically from a Nexus FT RMR to OM-Online, stored and then viewed in the Alarm window.

Table 4-2 Alarm Troubleshooting

ID Alarm Text Alarm Unit Alarm Description

1 Power PSM Critical PSM does not work properly. A sum signal from the PSM

indicates that at least one voltage output has dropped. If no mains
breakdown relay is used, then the alarm will also be sent at mains
breakdown

Ceasing PSM. Ceasing is sent if the PSM works at start-up, and there is a

corresponding critical PSM alarm logged in the Events log. The
RMR will restart when the power is back and this alarm will be
sent

Ceasing The cause of the alarm has ceased

044-05326 Rev B 4-1

Troubleshooting Nexus FT RMR

Table 4-2 Alarm Troubleshooting (Continued)

ID Alarm Text Alarm Unit Alarm Description

2 RMR restart CU None Power on start, or user ordered reboot. Logged to indicate a

normal power up, or a restart ordered by the operator

Warning Software error restart, 1st – 7th time. Restart 1st to 7th time during

a 14 day period. The counter is reset every 14th day, counted
from power up

Error Software error restart 8th – 10th time. Restart 8th to 10th time

during the 14 day period. At the 11th time, the SW bank will be
blocked and not used anymore until a user ordered reset is
performed, or power is switched off/on

3Mains

breakdown

4 Alarm reset CU None Alarm reset by the user. All alarms are reset. The cause of the

5 Local bus

error

6 Main bkd w

backup

7Err in AD-

converter

8 New unit

detected

9 Inst. unit lost Error Compared to the last power on, the CU lacks at least one

External Critical The mains power is gone. Used with an external relay indicating

mains breakdown. The external relay should be connected to
External Alarm 1 and the RMR configured to indicate this alarm. If
no relay is used, a mains breakdown will be reported as a PSM
fault

Ceasing The mains power is back. Sent if there is a corresponding critical

mains breakdown alarm logged in the Events Log. The RMR will
restart when the power is back

alarm will be re-evaluated and reported, if still active

WBA #,
MCPA#

External Error Used to indicate that the mains is no longer available. RMR is

Error Error when communicating on the bus. The CU has no contact

with the WBA, or MCPA PCBA, which is taken out of service

powered by external battery backup unit. Suggested remedy:
Check the mains power

Ceasing The cause of the alarm has ceased

Warning The analog-to-digital converter on the CU PCBA does not give

reliable values

None Compared to the last power on, the CU has recognized at least

one additional hardware unit

hardware unit

10 EEPROM

error

11 Log memory

fault

12 High temp CU Warning The CU PCBA temperature is higher than 90°C

13 REFO error Error Significant REFO drift or error detected by CU

14 Ext REFO

error

CU Error EEP read or write fail. Data cannot be written or read from the

EEPROM on the CU PCBA. User parameters are stored in the
EEPROM

Error Log memory fault. Indicates that the log memory on the CU PCBA

is faulty. The RMR will not work. Not available in all CU software
versions

Ceasing The CU PCBA temperature has fallen below 90°C

Warning Suggested remedy: Check the reference source and the cables

4-2 044-05326 Rev B

Nexus FT RMR Troubleshooting

Table 4-2 Alarm Troubleshooting (Continued)

ID Alarm Text Alarm Unit Alarm Description

15 CU battery

fault

16 SW load error CU Error Software load error. An error has occurred during a software load

17 Log cleared CU None Log memory has been cleared. The check sum in the Events Log

18 RTC restarted CU None The time is changed by the operator (logged to keep track of

19 RTC error Error RTC does not operate. The CU has detected an error in the RTC

20 Door open

alarm

CU Warning CU RAM battery fault. The battery for the RAM on the CU PCBA

has a voltage outside the normal 2.7 to 3.5 Volt. An alarm may be
initiated at start-up if the RMR has been stored out of power for a
long time. Suggested remedy: Ensure jumper P3 on the CU PCBA
is mounted to charge the battery

Ceasing The cause of the alarm has ceased

process. The flash memory does not contain a proper software.
Suggested remedy: Check the CU software using the OM-Online
SW Manager. Do NOT restart the RMR

memory is faulty. The log is cleared. Can be caused by a bad
RAM battery backup or low voltage to the RAM

changes made to the RTC)

Warning Time reset to 1994-01-01. The RTC was unable to keep track of

the time and did a reset. Suggested remedy: Ensure jumper P3 on
the CU PCBA is mounted to charge the battery

operation which makes the time unreliable. Suggested remedy:
Replace the CU PCBA

External Config The door has been open 30 seconds without disabling the alarm

Ceasing The door has been closed 30 seconds, or the alarm is disabled

21 External

alarm 1

22 External

alarm 2

23 Fan failure

alarm 3

24 Fan failure

alarm 4

34 Login failed None Invalid RMR password

40 Battery fault RCU, FON

External Config External alarm input EA1 active more than 1 second

Ceasing External alarm input EA1 no longer active

External Config External alarm input EA2 active more than 1 second

Ceasing External alarm input EA2 no longer active

External Config External alarm input EA3 active more than 1 second

Ceasing External alarm input EA3 no longer active

External Config External alarm input EA4 active more than 1 second

Ceasing External alarm input EA4 no longer active

Error The backup battery on the RCU or the FON PCBA does not work

charger

Ceasing The cause of the alarm has ceased

properly. Suggested remedy: Check cables or replace battery

044-05326 Rev B 4-3

Troubleshooting Nexus FT RMR

Table 4-2 Alarm Troubleshooting (Continued)

ID Alarm Text Alarm Unit Alarm Description

42 Antenna

isolation

48 Battery

backup fault

70 Bad table

alarm

71 Table not

found

72 Table

database
error

80 Antenna

SWR alarm

WBA #,
Channel #,
UL/DL

External Error If a battery backup unit alarm is connected to external alarm 2,

CU Error Requested table contains incorrect information (SW error)

CU Error Requested table not found in the database (SW or calibration

CU Error Table database not found (calibration error)

Donor
antenna
service
antenna

Warning Low antenna isolation. The antenna isolation is lower than the

gain set. Gain is reduced by 10dB – 13dB below the oscillation
point. Suggested remedy: Decrease gain or increase antenna
isolation

Error Low antenna isolation at lowest gain. The gain has been reduced

as much as possible but the oscillation still remains. The amplifier
is turned off. Suggested remedy: Decrease gain or increase
antenna isolation

Ceasing Normal operation again, that is no oscillation can be detected

13dB above the gain set

then the operator can configure the RMR to display this alarm
when the battery backup unit indicates alarm

Ceasing The cause of the alarm has ceased

error)

Error Too low antenna return loss, caused either by cables, connectors,

or antenna problems.

Suggested remedy: Check antenna and cables

90 FON power

alarm

245 Not In

Allowed Area

Ceasing The cause of the alarm has ceased

FON RF Error A DC voltage on a FON PCBA is out of range. Suggested remedy:

Replace the FON PCBA.

Ceasing The cause of the alarm has ceased

CU None RMR is moved from the operating area and the RF HW is

switched on or off

4-4 044-05326 Rev B

Nexus FT RMR Field Replaceable Units

Remove these screws

Field Replaceable Units

The fan assembly is the only field replaceable unit. If any other components fail, please contact Powerwave
for service.

Fan Removal and Replacement

Refer to Table 4-3 and figures 4-1 and 4-2.

Table 4-3 Fan Removal

Step Action

1 Disconnect power from the RMR.

2 Remove four retaining screws from the fan assembly housing. See Figure 4-1.

3 Remove the fan assembly and disconnect the plug. See Figure 4-2.

4 Install the new fan assembly in reverse order.

Figure 4-1 Fan Assembly Screws

Figure 4-2 Fan Assembly

044-05326 Rev B 4-5

NetWay Manager (NWM) Nexus FT RMR

NetWay Manager (NWM)

NWM is a Powerwave software package for network management. NWM can be used to access repeaters for
alarm reception, radio parameter configuration, software downloading, and scheduling activities.

Return For Service Procedures

When returning products to Powerwave, the following procedures will ensure optimum response.

Obtaining an RMA

A Return Material Authorization (RMA) number must be obtained prior to returning equipment to the factory
for service. Pease contact our Repair Department at [phone] to obtain this number, or FAX your
request to [phone]. Failure to obtain this RMA number may result in delays in receiving repair
service.

Repackaging for Shipment

To ensure safe shipment of the unit, it is recommended that the original package designed for shipping the
unit be reused. If it is not available, contact Powerwave’s Customer Service Department at 1-800-797-9283,
[phone] or by e-mail at [e-mail] for packing material.

4-6 044-05326 Rev B

Introduction

This chapter provides specifications for the Nexus FT RMR.

Table 5-1: RMR Specifications

Electrical

Frequency band UL 824 to 849 MHz (Cellular)

806 to 824 MHz (800 iDEN)
896 to 902 MHz (900 iDEN)
1850 to 1910 MHz (PCS)

Frequency band DL 869 to 894 MHz (Cellular)

851 to 869 MHz (800 iDEN)
935 to 941 MHz (900 iDEN)
1930 to 1990 MHz (PCS)

Max absolute delay <300 ns

Gain adjustment range (in 1 dB steps) 30 dB

Chapter 5

Specifications

Gain

Uplink
Downlink
Variation
*These are typical values and may vary due
to cable length.

Instantaneous bandwidth 25 MHz (Cellular)

Uplink AGC limit 0 dBm at FON input

Downlink AGC limit 43 dBm at antenna port

Return Loss 11 dB (Service Port), 14 dB (Donor Port)

Downlink, Spurious and Emissions level -13 dBm/1 MHz (FCC)

Downlink power +46.3 dBm RMS (20 Watts)

Noise figure excluding Uplink 4 dB

Power supply voltage 85 - 265VAC

35 to 60 dB typical - Excluding fiber link
45 to 70 dB typical - Excluding fiber link
Typically ± 1.5 dB versus temperature
± 2.0 dB versus DL frequency
± 0.5 dB versus DL output power
± 0.5 dB versus input voltage
± 2.0 dB versus UL frequency

18 MHz (800 iDEN)
5 MHz (900 iDEN)
60 MHz (PCS)
45 MHz (AWS)

Current Rating .6A RMS

Maximum Current Draw (Dual Band) 6.5 A @115 VAC

3 A @ 230 VAC

044-05326 Rev B 5-1

Introduction Nexus FT RMR

Table 5-1: RMR Specifications (Continued)

Recommend Fuse Size 10 - 20 A for AC Voltage

Power consumption 420 W typical, 600 W max

Impedance

Input
Output

Mechanical

Dimensions (W x H x D in inches) 403 x 265.9 x 551 mm (15.9 x 10.5x 21.7 in)

Weight < 30 kg (66 lbs)

Service Antenna port connector Female N-Type

Donor Port Connector SMA

Environmental

Operating Temperature Range -0 °C to +55 °C (32°F to +131°F)

Altitude -142 m to 4000 m (-466 ft. to 13100 ft.

Casing class IP21

Not Applicable
50 Ω

5-2 044-05326 Rev B