Huawei BTS3902E U1900 Users Guide

BTS3902E WCDMA

Installation Guide

Issue Draft A

Date 2011-06-30

HUAWEI TECHNOLOGIES CO., LTD.

No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: http://www.huawei.com

Email: support@huawei.com

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BTS3902E WCDMA Installation Guide About This Document

About This Document

Purpose

This document describes the procedures for installing a BTS3902E in different scenarios. It also provides checklists for hardware installation.

Product Version

The following table lists the product version related to this document.

Product Name

BTS3902E WCDMA (referred to as BTS3902E in this document)

Intended Audience

This document is intended for:

l Base station installation engineers

Organization

1 Changes in the BTS3902E WCDMA Installation Guide

This chapter describes the changes in the BTS3902E WCDMA Installation Guide.

2 Installation Preparations

Product Version

V200R013

This chapter describes instrument preparations, and skills and qualifications that installation engineers must possess.

3 Information About the Installation

This chapter describes the information that you must be familiar with before installing a BTS3902E, including the BTS3902E exterior, ports, installation options, physical supports, and installation clearance requirements.

4 Unpacking the Equipment

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About This Document

BTS3902E WCDMA

Installation Guide

Unpack and check the delivered equipment to ensure that all the materials are included and intact.

5 Obtaining the ESN

The Electronic Serial Number (ESN) is a unique identifier of a Network Element (NE). Record the ESN for later commissioning of the base station before installation.

6 Installation Process

The BTS3902E installation process involves installing a BTS3902E and related cables, checking the BTS3902E hardware installation, and powering on the BTS3902E.

7 Installing a BTS3902E

This section describes the procedures for installing a BTS3902E. The BTS3902E can be installed on a pole, wall, or wood pole depending on the installation environment.

8 Installing an AC Surge Protection Box and Related Cables

This chapter describes the dimensions, installation clearance requirements, and installation options of an AC surge protection box. It also describes the procedure for installing the surge protection box. An AC surge protection box can be configured when a BTS3902E is installed outdoors.

Conventions

9 Installing Cables

This chapter describes the procedure and precautions for installing the PGND cables, power cables, and transmission cables for a BTS3902E in various scenarios. Based on actual requirements, and it also describes how to install an optional monitoring signal cable as required.

Symbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol

Description

Indicates a hazard with a high level of risk, which if not avoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, which if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if not avoided, could result in equipment damage, data loss, performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or save time.

Provides additional information to emphasize or supplement important points of the main text.

General Conventions

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BTS3902E WCDMA Installation Guide About This Document

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New

Examples of information displayed on the screen are in Courier New.

Command Conventions

The command conventions that may be found in this document are defined as follows.

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated by

vertical bars. One item is selected or no item is selected.

{ x | y | ... }

Optional items are grouped in braces and separated by vertical bars. A minimum of one item or a maximum of all items can be selected.

[ x | y | ... ]

Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.

Convention

Description

Boldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder.

Keyboard Operations

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About This Document

BTS3902E WCDMA

Installation Guide

The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means

the two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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BTS3902E WCDMA Installation Guide Contents

Contents

About This Document...................................................................................................................iii

1 Changes in the BTS3902E WCDMA Installation Guide....................................................1-1

2 Installation Preparations...........................................................................................................2-1

2.1 Tools and Instruments.....................................................................................................................................2-2

2.2 Skills and Requirements for Onsite Personnel................................................................................................2-3

3 Information About the Installation........................................................................................3-1

3.1 BTS3902E Exterior.........................................................................................................................................3-2

3.2 BTS3902E Ports..............................................................................................................................................3-3

3.3 BTS3902E Indicators......................................................................................................................................3-5

3.4 BTS3902E Installation Options......................................................................................................................3-6

3.5 Installation Clearance Requirements...............................................................................................................3-9

4 Unpacking the Equipment.......................................................................................................4-1

5 Obtaining the ESN.....................................................................................................................5-1

6 Installation Process....................................................................................................................6-1

7 Installing a BTS3902E................................................................................................................7-1

7.1 Mounting Kits for Installing a BTS3902E......................................................................................................7-2

7.2 Installing a BTS3902E on a Pole with the Diameter of 60 mm to 114 mm (2.36 in. to 4.49 in.)...................7-3

7.3 Installing a BTS3902E on a Pole with the Diameter of 114 mm to 400 mm (4.49 in. to 15.75 in.)...............7-5

7.4 Installing a BTS3902E on a Wall....................................................................................................................7-9

7.5 Installing a BTS3902E on a Wood Pole........................................................................................................7-13

8 Installing an AC Surge Protection Box and Related Cables..............................................8-1

8.1 Dimensions and Installation Clearance Requirements of an AC Surge Protection Box.................................8-2

8.2 Installation Options of an AC Surge Protection Box......................................................................................8-3

8.3 Installing an AC Surge Protection Box...........................................................................................................8-6

8.4 Installing Cables for an AC Surge Protection Box.......................................................................................8-11

9 Installing Cables.........................................................................................................................9-1

9.1 Cabling Requirements.....................................................................................................................................9-3

9.2 Cable Connections...........................................................................................................................................9-4

9.3 Installing a PGND Cable and Equipotential Cable.........................................................................................9-8

9.4 Installing a BTS3902E Power Cable.............................................................................................................9-11

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BTS3902E WCDMA

Contents

9.5 (Optional) Installing a BTS3902E RF Jumper..............................................................................................9-13

9.6 Installing Transmission Cables.....................................................................................................................9-16

9.6.1 Installing an FE/GE Cable....................................................................................................................9-16

9.6.2 Installing an FE/GE Fiber Optic Cable................................................................................................9-17

9.6.3 Installing an FE/GE Fiber Optic Cable for Cascading.........................................................................9-19

9.6.4 (Optional) Installing the Monitoring Signal Cable..............................................................................9-20

9.7 Installing the Housing...................................................................................................................................9-21

9.7.1 (Optional) Installing a Camouflage Shell.............................................................................................9-21

9.7.2 Installing the Upper Housing...............................................................................................................9-24

9.8 Checking the BTS3902E Hardware Installation...........................................................................................9-25

9.9 Performing a Power-On Check on the BTS3902E........................................................................................9-27

9.10 Appendix.....................................................................................................................................................9-28

9.10.1 Adding OT Terminals to the Power Cable Connected to the AC Surge Protection Box...................9-28

9.10.2 Installing a Ground Clip.....................................................................................................................9-30

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BTS3902E WCDMA Installation Guide Figures

Figures

Figure 3-1 BTS3902E.......................................................................................................................................... 3-2

Figure 3-2 Dimensions of a BTS3902E without a housing..................................................................................3-2

Figure 3-3 Dimensions of a BTS3902E with a housing and antennas.................................................................3-3

Figure 3-4 Positions of the BTS3902E ports and indicators................................................................................3-4

Figure 3-5 Diameter of a pole.............................................................................................................................. 3-7

Figure 3-6 BTS3902E installed on a pole............................................................................................................3-7

Figure 3-7 Diameter of a pole.............................................................................................................................. 3-7

Figure 3-8 BTS3902E installed on a pole............................................................................................................3-8

Figure 3-9 BTS3902E installed on a wall............................................................................................................3-9

Figure 3-10 BTS3902E installed on a wood pole................................................................................................ 3-9

Figure 3-11 Recommended installation clearance for a single BTS3902E........................................................3-10

Figure 3-12 Minimum installation clearance for a single BTS3902E................................................................3-10

Figure 3-13 Recommended installation clearance for two BTS3902Es installed side by side..........................3-11

Figure 3-14 Minimum installation clearance for two BTS3902Es installed side by side..................................3-11

Figure 3-15 Recommended installation clearance for two BTS3902Es installed in a vertical line...................3-12

Figure 3-16 Minimum installation clearance for two BTS3902Es installed in a vertical line...........................3-13

Figure 5-1 Obtaining the ESN..............................................................................................................................5-2

Figure 6-1 Process of installing the BTS3902E...................................................................................................6-2

Figure 7-1 Rear of a BTS3902E...........................................................................................................................7-2

Figure 7-2 Mounting bracket assembly for installing a BTS3902E.....................................................................7-2

Figure 7-3 Adapting plate assembly for installing a BTS3902E..........................................................................7-3

Figure 7-4 Installing the bracket assembly...........................................................................................................7-4

Figure 7-5 Securing the bracket assembly onto the pole......................................................................................7-4

Figure 7-6 Installing the BTS3902E on the main mounting bracket................................................................... 7-5

Figure 7-7 Installing the adapting plate assembly ...............................................................................................7-6

Figure 7-8 Installing the hose clamps...................................................................................................................7-7

Figure 7-9 Securing the hose clamp.....................................................................................................................7-8

Figure 7-10 Installing the BTS3902E on the main mounting bracket................................................................. 7-8

Figure 7-11 Installing the adapting plate assembly .............................................................................................7-9

Figure 7-12 Marking the anchor points..............................................................................................................7-10

Figure 7-13 Drilling a hole and installing an expansion bolt assembly.............................................................7-11

Figure 7-14 Fitting the mounting piece on the expansion bolt...........................................................................7-12

Figure 7-15 Installing the BTS3902E on the main mounting bracket...............................................................7-13

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BTS3902E WCDMA

Figures

Figure 7-16 Drilling holes..................................................................................................................................7-14

Figure 7-17 Installing the adapting plate assembly ...........................................................................................7-15

Figure 7-18 Securing the securing pieces...........................................................................................................7-16

Figure 7-19 Tightening nuts...............................................................................................................................7-17

Figure 7-20 Installing the BTS3902E on the main mounting bracket...............................................................7-18

Figure 8-1 Dimensions of an AC surge protection box........................................................................................8-2

Figure 8-2 Recommended installation clearance for an AC surge protection box...............................................8-2

Figure 8-3 Minimum installation clearance for an AC surge protection box.......................................................8-3

Figure 8-4 Diameter of a pole..............................................................................................................................8-3

Figure 8-5 AC surge protection box installed on a pole.......................................................................................8-4

Figure 8-6 Diameter of a pole..............................................................................................................................8-4

Figure 8-7 AC surge protection box installed on a pole.......................................................................................8-5

Figure 8-8 AC surge protection box installed on a wall.......................................................................................8-5

Figure 8-9 AC surge protection box installed on a wood pole.............................................................................8-6

Figure 8-10 Installing the AC surge protection box on a pole.............................................................................8-6

Figure 8-11 Marking the anchor points................................................................................................................8-7

Figure 8-12 Installing an expansion bolt..............................................................................................................8-8

Figure 8-13 Installing an AC surge protection box..............................................................................................8-8

Figure 8-14 Drilling holes....................................................................................................................................8-9

Figure 8-15 Installing the AC surge protection box on the wood pole..............................................................8-10

Figure 8-16 Tightening the nuts.........................................................................................................................8-11

Figure 8-17 Opening the cover plate of the AC surge protection box...............................................................8-12

Figure 8-18 Cable connections of the AC surge protection box........................................................................8-12

Figure 8-19 Closing the cover plate of the AC surge protection box.................................................................8-13

Figure 8-20 Securing AC power cables.............................................................................................................8-14

Figure 8-21 Installing the PGND cable and equipotential cable........................................................................8-14

Figure 9-1 Cable connections of a single BTS3902E implementing transmission over an electrical port..........9-5

Figure 9-2 Cable connections of a single BTS3902E implementing transmission over an optical port..............9-6

Figure 9-3 Cable connections of a single BTS3902E implementing POE over an electrical port and transmission

using a fiber optic cable........................................................................................................................................9-7

Figure 9-4 Cable connections of two BTS3902Es implementing transmission and cascading using fiber optic cables

...............................................................................................................................................................................9-8

Figure 9-5 Installing the BTS3902E PGND cable...............................................................................................9-9

Figure 9-6 Installing an OT terminal in the correct manner...............................................................................9-10

Figure 9-7 Installing the PGND cable and equipotential cable..........................................................................9-10

Figure 9-8 Installing an OT terminal in the correct manner...............................................................................9-11

Figure 9-9 Connection of the power cable between the BTS3902E and power equipment...............................9-12

Figure 9-10 Connection of the BTS3902E power cable to the surge protection box.........................................9-13

Figure 9-11 Installing the BTS3902E RF jumper..............................................................................................9-14

Figure 9-12 Wrap the connector of the BTS3902E RF jumper..........................................................................9-14

Figure 9-13 Waterproofing a dustproof cap.......................................................................................................9-15

Figure 9-14 Installing the FE/GE cable .............................................................................................................9-17

Figure 9-15 Installing the optical module..........................................................................................................9-18

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BTS3902E WCDMA Installation Guide Figures

Figure 9-16 Installing the FE/GE fiber optic cable............................................................................................9-18

Figure 9-17 Tightening the round connector......................................................................................................9-19

Figure 9-18 Installing an optical module...........................................................................................................9-20

Figure 9-19 Installing the FE/GE Fiber Optic Cable ........................................................................................9-20

Figure 9-20 Installing the monitoring signal cable............................................................................................9-21

Figure 9-21 Loosening the screws from the housing.........................................................................................9-22

Figure 9-22 Moving the upper housing..............................................................................................................9-22

Figure 9-23 Installing the camouflage shell.......................................................................................................9-23

Figure 9-24 Tightening the screws.....................................................................................................................9-24

Figure 9-25 Closing the housing and tightening the screws..............................................................................9-25

Figure 9-26 BTS3902E power-on check procedure...........................................................................................9-27

Figure 9-27 Cable diagram on labels.................................................................................................................9-28

Figure 9-28 Leading the power cable through corrugated pipes .......................................................................9-29

Figure 9-29 Joining corrugated pipes ................................................................................................................9-29

Figure 9-30 Determining the length of the power cable ....................................................................................9-30

Figure 9-31 Stripping the specified length of the sheath and shield layer.........................................................9-30

Figure 9-32 Stripping the sheath off each core wire .........................................................................................9-30

Figure 9-33 Adding OT terminals......................................................................................................................9-30

Figure 9-34 Stripping the sheath off the FE/GE cable.......................................................................................9-31

Figure 9-35 Tightening the screws on a ground clip..........................................................................................9-31

Figure 9-36 Wrapping waterproof tape and PVC insulation tape .....................................................................9-32

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BTS3902E WCDMA Installation Guide Tables

Tables

Table 3-1 BTS3902E ports and indicators...........................................................................................................3-4

Table 3-2 BTS3902E indicators...........................................................................................................................3-5

Table 9-1 Specifications of the BTS3902E PGND cable and equipotential cable...............................................9-8

Table 9-2 Specifications of the BTS3902E power cable....................................................................................9-11

Table 9-3 Checklist for the BTS3902E Hardware Installation...........................................................................9-25

Table 9-4 Checklist for the installation of an AC surge protection box.............................................................9-26

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BTS3902E WCDMA Installation Guide 1 Changes in the BTS3902E WCDMA Installation Guide

1 Changes in the BTS3902E WCDMA

Installation Guide

This chapter describes the changes in the BTS3902E WCDMA Installation Guide.

Draft A (2011-06-30)

This is the draft.

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1-1

BTS3902E WCDMA Installation Guide 2 Installation Preparations

2 Installation Preparations

About This Chapter

This chapter describes instrument preparations, and skills and qualifications that installation engineers must possess.

2.1 Tools and Instruments

All required tools and instruments must be ready before the installation.

2.2 Skills and Requirements for Onsite Personnel

Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions.

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2 Installation Preparations

2.1 Tools and Instruments

All required tools and instruments must be ready before the installation.

BTS3902E WCDMA

Installation Guide

Hammer drill (with a φ 12 bit, φ 14 bit, and φ 18 bit)

Heat gun Phillips screwdriver (M3 to

Rubber mallet COAX crimping tool Wire stripper

Utility knife Wire clippers Adjustable wrench (capacity

Electrostatic discharge (ESD) gloves

M6)

Vacuum cleaner

Flat-head screwdriver (M3 to M6)

≥ 32 mm [1.26 in.])

Level Torque screwdriver

5 mm (0.2 in.)

(M3 to M6)

Combination wrench

Capacity: 17 mm [0.67 in.] or 21 mm [0.83 in.]

Inner hexagon wrench Measuring tape

Torque wrench

Capacity: 17 mm (0.67 in.) or 21 mm (0.83 in.)

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BTS3902E WCDMA Installation Guide 2 Installation Preparations

Multimeter

Marker (diameter ≤ 10 mm [0.39 in.])

—

2.2 Skills and Requirements for Onsite Personnel

Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions.

Before the installation, pay attention to the following items:

l The customer's technical engineers must be trained by Huawei and be familiar with the

proper installation and operation methods.

l The number of onsite personnel depends on the engineering schedule and installation

environment. Generally, only three to five onsite personnel are necessary.

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BTS3902E WCDMA Installation Guide 3 Information About the Installation

3 Information About the Installation

About This Chapter

3.1 BTS3902E Exterior

Th BTS3902E has a modular design with its ports on the bottom.

3.2 BTS3902E Ports

The BTS3902E ports are on the bottom, and the indicators are in the indicator on the front.

3.3 BTS3902E Indicators

A BTS3902E has six indicators, which indicate the running status of the BTS3902E.

3.4 BTS3902E Installation Options

This section describes the BTS3902E installation options. A BTS3902E can be installed on a pole, wall, or wood pole.

3.5 Installation Clearance Requirements

This section describes the clearance requirements for installing a BTS3902E on a pole, wall, or wood pole.

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3 Information About the Installation

3.1 BTS3902E Exterior

Th BTS3902E has a modular design with its ports on the bottom.

Figure 3-1 shows the BTS3902E. The BTS3902E on the left has a housing, and the BTS3902E

on the right does not have a housing. The camouflage shell is optional.

Figure 3-1 BTS3902E

BTS3902E WCDMA

Installation Guide

(1) Upper housing (2) Camouflage shell (3) BTS3902E

Figure 3-2 shows the dimensions of a BTS3902E without a housing, and Figure 3-3shows the

dimensions of a BTS3902E with a housing.

Figure 3-2 Dimensions of a BTS3902E without a housing

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Figure 3-3 Dimensions of a BTS3902E with a housing and antennas

3.2 BTS3902E Ports

The BTS3902E ports are on the bottom, and the indicators are in the indicator on the front.

Figure 3-4 shows the positions of the BTS3902E ports and indicators.

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3 Information About the Installation

Figure 3-4 Positions of the BTS3902E ports and indicators

BTS3902E WCDMA

Installation Guide

Table 3-1 describes the BTS3902E ports and indicators.

Table 3-1 BTS3902E ports and indicators

Item

Label Description

Ports ANTA_TX/RX TX/RX port A

ANTB_TX/RX TX/RX port B

ANTC_SON SON antenna port

ETH FE/GE electrical port

OPT0 FE/GE optical port

OPT1 FE/GE optical port

MON Environment monitoring port for an RS485

input and four dry contact inputs.

PWR Power supply port

DBG Port for commissioning, clock test, or

software upgrade

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Item Label Description

Indicators RUN For details, see BTS3902E Indicators.

ALM

ACT

VSWR

O/E

3.3 BTS3902E Indicators

A BTS3902E has six indicators, which indicate the running status of the BTS3902E.

For details about the indicator positions on the BTS3902E panel, see BTS3902E Ports.

Table 3-2 describes BTS3902E indicators.

Table 3-2 BTS3902E indicators

Indicator

RUN Green Steady on There is power supply, but the BTS3902E is

ALM Red Steady on Alarms are generated, and the BTS3902E

Color Status Description

faulty.

Off There is no power supply, or the BTS3902E

is faulty.

Blinking (on for 1s and off for 1s)

Blinking (on for

0.125s and off for

0.125s)

Blinking (on for 1s and off for 1s)

The BTS3902E is working properly.

Software is being loaded to the BTS3902E, or the BTS3902E is not started.

must be replaced.

Alarms are generated. The alarms may be caused by the faults on the related boards or ports. Therefore, the necessity for BTS3902E replacement is uncertain.

Off No alarm is generated.

ACT Green Steady on The BTS3902E is working properly with TX

channels enabled.

Blinking (on for 1s and off for 1s)

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The BTS3902E is working properly with TX channels disabled.

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3 Information About the Installation

Indicator Color Status Description

VSWR Red Off No VSWR alarm is generated.

BTS3902E WCDMA

Installation Guide

Blinking red (on for 1s and off for 1s)

Steady red VSWR alarms are generated on the

Blinking red (on for 0.125s and off for 0.125s)

O/E Green Steady on The OPT1 or ETH port is connected

Blinking (on for

0.125s and off for

0.125s)

Off The OPT1 or ETH port is connected

O Green Steady on The OPT0 port is connected properly.

Blinking (on for

0.125s and off for

0.125s)

VSWR alarms are generated on the ANTB_TX/RX port.

ANTA_TX/RX port.

VSWR alarms are generated on the ANTA_TX/RX and ANTB_TX/RX ports.

properly.

The OPT1 or ETH port is transmitting or receiving data.

improperly.

The OPT0 port is transmitting or receiving data.

Off The OPT0 port is connected improperly.

3.4 BTS3902E Installation Options

This section describes the BTS3902E installation options. A BTS3902E can be installed on a pole, wall, or wood pole.

Installing a BTS3902E on a Pole with the Diameter of 60 mm to 114 mm (2.36 in. to

4.49 in.)

Figure 3-5 shows the diameter of a pole for installing a BTS3902E.

CAUTION

l The recommended diameter is 80 mm (3.15 in.).

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Figure 3-5 Diameter of a pole

Figure 3-6 shows a BTS3902E installed on a pole.

Figure 3-6 BTS3902E installed on a pole

Installing a BTS3902E on a Pole with the Diameter of 114 mm to 400 mm (4.49 in. to 15.75 in.)

Figure 3-7 shows the diameter of a pole for installing a BTS3902E.

Figure 3-7 Diameter of a pole

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3 Information About the Installation

Figure 3-8 shows a BTS3902E installed on a pole.

Figure 3-8 BTS3902E installed on a pole

BTS3902E WCDMA

Installation Guide

Installing a BTS3902E on a Wall

The wall on a BTS3902E is installed must meet the following requirements:

l When a single BTS3902E is installed, the wall has a capacity of bearing at least four times

the weight of the BTS3902E.

l Expansion bolts must be tightened to 30 N·m (265.52 lbf·in.) to ensure the bolts work

properly and the wall remains intact without cracks in it.

Figure 3-9 shows a BTS3902E installed on a wall.

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