Huawei RRU3232-3650F Users Guide

RRU3232

Installation Guide

Issue 05

Date 2011-10-20

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.

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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About This Document

About This Document

Purpose

This document describes the process of installing a DC RRU3232 (referred to as RRU in this document).

Product Version

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

Product Name

Product Version

 

 

DBS3900 LTE

V100R003C00 and later versions

 

 

Intended Audience

This document is intended for:

Base station installation engineers

Organization

1 Changes in the RRU3232 Installation Guide

This chapter describes the changes in the RRU3232 Installation Guide.

2 Installation Preparations

This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills and prerequisites that installation engineers must have.

3 Information About the Installation

Before installing an RRU, you must be familiar with its exterior, ports, installation options, physical supports, and installation clearance requirements.

4 Unpacking the Equipment

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

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About This Document

 

5 Installation Process

The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU.

6 Installing the RRU

This chapter describes the procedure for installing the RRU. The RRU can be installed on a pole, U-steel, angle steel, or wall. The procedure for installing the RRU varies depending on installation options.

7 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

8 Checking the RRU Hardware Installation

After an RRU is installed, check the hardware installation.

9 Powering On an RRU

After all the devices are installed, check the power-on status of an RRU.

10 Appendix

This section describes the procedure for adding an easy power receptacle (pressfit type) connector.

Conventions

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

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

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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

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

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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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Contents

Contents

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

 

ii

1 Changes in the RRU3232 Installation Guide...........................................................................

1

2 Installation Preparations..............................................................................................................

 

4

2.1

Reference Documents.........................................................................................................................................

 

5

2.2

Tools and Instruments........................................................................................................................................

 

5

2.3

Skills and Requirements for Onsite Personnel...................................................................................................

6

3 Information About the Installation...........................................................................................

7

3.1

RRU Exterior......................................................................................................................................................

 

8

3.2

RRU Ports...........................................................................................................................................................

 

8

3.3

RRU Indicators.................................................................................................................................................

 

10

3.4

Installation Options...........................................................................................................................................

 

12

3.5

Installation Clearance Requirements of an RRU..............................................................................................

16

 

3.5.1 Installation Clearance for a Single RRU.................................................................................................

17

 

3.5.2 Installation Clearance for Multiple RRUs...............................................................................................

18

 

3.5.3 Installation Spacing Between RRUs........................................................................................................

22

4 Unpacking the Equipment.........................................................................................................

 

25

5 Installation Process.....................................................................................................................

 

27

6 Installing the RRU.......................................................................................................................

 

28

6.1

Mounting Kits for an RRU...............................................................................................................................

 

30

6.2

Installing the RRU on a Pole............................................................................................................................

 

30

 

6.2.1 Installing a Single RRU...........................................................................................................................

 

33

 

6.2.2 Installing Two RRUs...............................................................................................................................

 

35

 

6.2.3 Installing Multiple RRUs.........................................................................................................................

38

6.3

Installing the RRU on U-steel..........................................................................................................................

 

41

6.4

Installing the RRU on Angle Steel...................................................................................................................

44

6.5

Installing the RRU on a Wall...........................................................................................................................

 

47

6.6

Hoisting the RRU and Mounting Kits onto a Tower........................................................................................

52

7 Installing RRU Cables................................................................................................................

 

56

7.1

Cabling Requirements......................................................................................................................................

 

58

7.2

Cable Connections............................................................................................................................................

 

59

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Contents

7.3

Installation Process...........................................................................................................................................

63

7.4

RRU Cable List................................................................................................................................................

64

7.5

Installing an RRU PGND Cable.......................................................................................................................

65

7.6

Installing an RRU RF Jumper..........................................................................................................................

67

7.7

Installing an RRU Alarm Cable........................................................................................................................

69

7.8

Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable.........................................................

70

7.9

Opening the Cover Plate of an RRU Cabling Cavity.......................................................................................

72

7.10

Installing an RRU power cable.......................................................................................................................

74

7.11

Installing a CPRI Fiber Optic Cable...............................................................................................................

76

7.12

Installing an SFP High-Speed Cable for Cascading RRUs............................................................................

78

7.13

Closing the Cover Plate of an RRU Cabling Cavity......................................................................................

79

8 Checking the RRU Hardware Installation..............................................................................

82

9 Powering On an RRU.................................................................................................................

83

10 Appendix.....................................................................................................................................

84

10.1

Adding an Easy Power Receptacle (Pressfit Type) Connector to the RRU Power Cable on the RRU Side

................................................................................................................................................................................

 

 

85

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1 Changes in the RRU3232 Installation Guide

1Changes in the RRU3232 Installation Guide

This chapter describes the changes in the RRU3232 Installation Guide.

05 (2011-10-20)

This is the fifth official release.

Compared with issue 04 (2011-09-15), this issue does not add any information.

Compared with issue 04 (2011-09-15), this issue incorporates the following changes:

Topic

Change Description

 

 

7.6 Installing an RRU RF Jumper

Deleted the information about the external

 

filter.

 

 

Compared with issue 04 (2011-09-15), this issue omits the following topic:

Installing an SFP high-speed cable for cascaded RRUs

04 (2011-09-15)

This is the fourth official release.

Compared with issue 03 (2011-07-15), this issue does not add any information.

Compared with issue 03 (2011-07-15), this issue incorporates the following changes:

Topic

Change Description

 

 

9 Powering On an RRU

Optimized the description of the RRU power-

 

on check.

 

 

Compared with issue 03 (2011-07-15), this issue does not remove any information.

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1 Changes in the RRU3232 Installation Guide

03 (2011-07-15)

This is the third official release.

Compared with issue 02 (2011-06-10), this issue does not add any information.

Compared with issue 02 (2011-06-10), this issue incorporates the following change:

Topic

Change Description

 

 

3.5.2 Installation Clearance for Multiple

Optimized the clearance requirements for

RRUs

multiple RRUs installed on a wall in standard

 

mode.

 

 

Compared with issue 02 (2011-06-10), this issue does not remove any information.

02 (2011-06-10)

This is the second official release.

Compared with issue 01 (2011-05-15), this issue does not add any information.

Compared with issue 01 (2011-05-15), this issue incorporates the following change:

Topic

Change Description

 

 

3.1 RRU Exterior

Optimized the RRU exterior.

 

 

Compared with issue 01 (2011-05-15), this issue does not remove any information.

01(2011-05-15)

This is the first official release.

Compared with draft A (2011-03-15), this issue does not add any information.

Compared with draft A (2011-03-15), this issue incorporates the following changes:

Topic

Change Description

 

 

Installing an RRU RF Jumper

Optimized the procedure for waterproofing

 

the connectors on the RRU RF jumper.

 

 

3.3 RRU Indicators

Optimized the status and meanings of CPRI

 

indicators.

 

 

Installation Clearance Requirements of an

Added the installation clearance

RRU

requirements for an RRU equipped with

 

external filters.

 

 

Installing an RRU RF Jumper

Added the procedure for installing an RRU

 

RF jumper when the RRU is equipped with

 

external filters.

 

 

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1 Changes in the RRU3232 Installation Guide

 

Compared with draft A (2011-03-15), this issue does not remove any information.

Draft A (2011-03-15)

This is the draft.

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2 Installation Preparations

2Installation Preparations

About This Chapter

This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills and prerequisites that installation engineers must have.

2.1 Reference Documents

Before the installation, you must be familiar with reference documents.

2.2 Tools and Instruments

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

2.3 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 Reference Documents

Before the installation, you must be familiar with reference documents.

The following reference documents are required during RRU installation:

RRU3232 Hardware Description

RRU3232 Hardware Maintenance Guide

DBS3900 Installation Guide

OCB User Guide

This document describes the RRU installation on a pole, U-steel, angle steel, or wall. If RRUs are installed on the IFS06, the following reference document is required:

DBS3900 (ICR) Installation Guide

2.2Tools and Instruments

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

Hammer drill (a φ 14 bit)

ESD gloves

Vacuum cleaner

 

 

 

Heat gun

Phillips screwdriver (M3 to

Flat-head screwdriver (M3 to

 

M6)

M6)

 

 

 

Rubber mallet

COAX crimping tool

Wire stripper

 

 

 

Utility knife

Cable cutter

Adjustable wrench (capacity

 

 

32 mm [1.26 in.])

 

 

 

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Level

Torque screwdriver

Torque wrench

 

 

 

Capacity: 17 mm [0.67 in.], 21

 

 

 

mm [0.82 in.], and 32 mm

 

 

5 mm

[1.26 in.]

 

 

Combination wrench

 

 

 

 

 

(M3 to M6)

 

 

 

 

Capacity: 17 mm [0.67 in.], 21

 

 

(M3 to M6)

mm [0.82 in.], and 32 mm

 

 

[1.26 in.]

 

 

 

 

 

Multimeter

Marker (diameter 10 mm

Measuring tape

 

 

[0.39 in.])

 

 

 

 

 

2.3 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:

The customer's technical engineers must be trained by Huawei and be familiar with the proper installation and operation methods.

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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3 Information About the Installation

3Information About the Installation

About This Chapter

Before installing an RRU, you must be familiar with its exterior, ports, installation options, physical supports, and installation clearance requirements.

3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

3.2 RRU Ports

This section describes RRU ports positioned on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel.

3.3 RRU Indicators

This section describes six indicators on an RRU. They indicate the running status.

3.4 Installation Options

This section describes RRU installation options. An RRU can be installed on a pole, U-steel, angle steel, or wall.

3.5 Installation Clearance Requirements of an RRU

This section describes the requirements for the installation clearance of a single RRU and multiple RRUs and the requirements for the installation spacing between RRUs.

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3 Information About the Installation

3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

Figure 3-1 shows an RRU.

The RRU on the left has a housing, and the RRU on the right does not have a housing.

Figure 3-1 RRU exterior

Figure 3-2 shows RRU dimensions.

Figure 3-2 RRU dimensions

3.2 RRU Ports

This section describes RRU ports positioned on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel.

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Figure 3-3 shows RRU ports on the panels.

Figure 3-3 RRU ports on the panels

Table 3-1 describes RRU ports and indicators on the panels.

Table 3-1 RRU ports and indicators on the panels

Item

Label

Description

 

 

 

(1) Ports at the bottom

ANT0-ANT3

TX/RX port. ANT0 port supports RET signal

 

 

transmission.

 

 

 

 

RET/EXT_ALM

Communication port for the RET antenna or

 

 

port for alarm reporting, supporting RET

 

 

signal transmission

 

 

 

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Item

Label

Description

 

 

 

 

 

(2) Ports in the cabling

CPRI0/IR0

Optical port

 

cavity

 

 

 

CPRI1/IR1

 

 

 

 

 

 

 

 

 

 

RTN(+)

Power supply socket

 

 

 

 

 

 

NEG(-)

 

 

 

 

 

 

(3) Indicators

RUN

For details, see 3.3 RRU Indicators.

 

 

 

 

 

 

ALM

 

 

 

 

 

 

 

ACT

 

 

 

 

 

 

 

VSWR

 

 

 

 

 

 

 

CPRI0/IR0

 

 

 

 

 

 

 

CPRI1/IR1

 

 

 

 

 

NOTE

When only two RF ports on the RRU are required to transmit RF signals, ports ANT0 and ANT1 are used by default.

The port for transmitting RET signals is determined by the software.

3.3 RRU Indicators

This section describes six indicators on an RRU. They indicate the running status.

For detailed positions of RRU indicators, see 3.2 RRU Ports.

Table 3-2 describes RRU indicators.

Table 3-2 RRU indicators

Label

Color

Status

Description

 

 

 

 

RUN

Green

On

There is power supply, but the module

 

 

 

is faulty.

 

 

 

 

 

 

Off

There is no power supply, or the

 

 

 

module is faulty.

 

 

 

 

 

 

Blinking (on for 1s and off

The module is working properly.

 

 

for 1s)

 

 

 

 

 

 

 

Blinking (on for 0.125s and

Software is being loaded to the

 

 

off for 0.125s)

module, or the module is not started.

 

 

 

 

ALM

Red

On

Alarms are generated, and the module

 

 

 

must be replaced.

 

 

 

 

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Label

Color

Status

Description

 

 

 

 

 

 

 

 

Off

No alarm is generated.

 

 

 

 

 

 

 

 

Blinking (on for 1s and off

Alarms are generated. The alarms

 

 

 

for 1s)

may be caused by the faults on the

 

 

 

 

related boards or ports. Therefore, the

 

 

 

 

necessity for module replacement is

 

 

 

 

uncertain.

 

 

 

 

 

 

ACT

Green

On

The module is working properly with

 

 

 

 

TX channels enabled.

 

 

 

 

 

 

 

 

Blinking (on for 1s and off

The module is working properly with

 

 

 

for 1s)

TX channels disabled.

 

 

 

 

 

 

VSWR

Red

Off

No VSWR alarm is generated.

 

 

 

 

 

 

 

 

On

VSWR alarms are generated.

 

 

 

 

 

 

CPRI0/

Red and

Steady green

The CPRI link is available.

 

IR0

green

 

 

 

Steady red

An optical module fails to transmit or

 

 

 

 

 

 

 

receive signals because the optical

 

 

 

 

module is faulty or the fiber optic

 

 

 

 

cable is broken.

 

 

 

 

 

 

 

 

Blinking red (on for 1s and

The CPRI link is out of lock because

 

 

 

off for 1s)

of mutual lock of dual-mode clock

 

 

 

 

sources or mismatched data rates over

 

 

 

 

CPRI ports (you are advised to check

 

 

 

 

the system configuration to identify

 

 

 

 

the fault).

 

 

 

 

 

 

 

 

Off

The SFP module is not properly

 

 

 

 

installed, or the optical module is

 

 

 

 

powered off.

 

 

 

 

 

 

CPRI1/

Red and

Steady green

The CPRI link is available.

 

IR1

green

 

 

 

Steady red

An optical module fails to transmit or

 

 

 

 

 

 

 

receive signals because the optical

 

 

 

 

module is faulty or the fiber optic

 

 

 

 

cable is broken.

 

 

 

 

 

 

 

 

Blinking red (on for 1s and

The CPRI link is out of lock because

 

 

 

off for 1s)

of mutual lock of dual-mode clock

 

 

 

 

sources or mismatched data rates over

 

 

 

 

CPRI ports (you are advised to check

 

 

 

 

the system configuration to identify

 

 

 

 

the fault).

 

 

 

 

 

 

 

 

Off

The SFP module is not properly

 

 

 

 

installed, or the optical module is

 

 

 

 

powered off.

 

 

 

 

 

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3 Information About the Installation

3.4 Installation Options

This section describes RRU installation options. An RRU can be installed on a pole, U-steel, angle steel, or wall.

Installing an RRU on a Pole

Figure 3-4 shows the diameter of pole for installing an AAU3801.

Figure 3-4 Diameter of a pole

CAUTION

The diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm (4.49 in.). The recommended diameter is 80 mm (3.15 in.).

If the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of two RRUs can be installed on the pole and the side-mounted installation is not recommended.

If three or more RRUs must be installed on a pole in centralized mode, the diameter of the pole must range from 76 mm (2.99 in.) mm to 114 mm (4.49 in.).

Figure 3-5 shows an RRU installed on a pole.

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Figure 3-5 RRU installed on a pole

Installing an RRU on U-steel

Figure 3-6 shows U-steel specifications.

Figure 3-6 U-steel specifications

CAUTION

It is recommended that only one RRU be installed on U-steel.

The vertical deviation angle of U-steel must be less than or equal to 10 degrees, as shown in

Figure 3-7.

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Figure 3-7 Requirements for the vertical deviation angle of U-steel or angle steel

(1) RRU

(2) U-steel or angle steel

Figure 3-8 shows an RRU installed on U-steel.

Figure 3-8 RRU installed on U-steel

Installing an RRU on Angle Steel

Figure 3-9 shows angle steel specifications.

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Figure 3-9 Angle steel specifications

CAUTION

It is recommended that only one RRU be installed on angle steel.

The vertical deviation angle of angle steel must be less than or equal to 10 degrees, as shown in Figure 3-7.

Figure 3-10 shows an RRU installed on angle steel.

Figure 3-10 RRU installed on angle steel

Installing an RRU on a Wall

The wall on which RRUs are installed must meet the following requirements:

When a single RRU is installed, the wall has a capacity of bearing at least four times the weight of the RRU.

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.

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CAUTION

The brackets cannot be combined when RRUs are installed on a wall, as shown in Figure 3-11.

Figure 3-11 Correct placement of brackets

Figure 3-12 shows an RRU installed on a wall.

Figure 3-12 RRU installed on a wall

3.5 Installation Clearance Requirements of an RRU

This section describes the requirements for the installation clearance of a single RRU and multiple RRUs and the requirements for the installation spacing between RRUs.

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NOTE

 

 

 

 

 

 

 

 

 

The recommended installation clearance ensures normal running and provides an appropriate space for

 

 

 

Operation and Maintenance (O&M). If there is sufficient space, leave the recommended installation

 

 

 

clearance.

 

 

 

The minimum installation clearance ensures normal running and heat dissipation, but OM activities such

 

 

 

as checking indicator status and opening the maintenance cavity cannot be properly conducted. If the

 

 

 

installation space is restricted, leave the minimum installation clearance.

3.5.1 Installation Clearance for a Single RRU

This section describes the recommended and minimum installation clearance for a single RRU.

Recommended Installation Clearance for a Single RRU

Figure 3-13 shows the recommended installation clearance for a single RRU.

Figure 3-13 Recommended installation clearance for a single RRU

Minimum Installation Clearance for a Single RRU

Figure 3-14 shows the minimum installation clearance for a single RRU.

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Figure 3-14 Minimum installation clearance for a single RRU

Minimum Installation Clearance for a Single RRU Installed on a Tower

Figure 3-15 shows the minimum installation clearance for a single RRU installed on a tower.

Figure 3-15 Minimum installation clearance for a single RRU installed on a tower

3.5.2 Installation Clearance for Multiple RRUs

This section describes the recommended and minimum installation clearance for multiple RRUs.

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Recommended Installation Clearance for Multiple RRUs Installed in Centralized Mode

Figure 3-16 shows the recommended installation clearance for multiple RRUs installed in centralized mode.

Figure 3-16 Recommended installation clearance for multiple RRUs installed in centralized mode

Minimum Installation Clearance for Multiple RRUs Installed in Centralized Mode

Figure 3-17 shows the minimum installation clearance for multiple RRUs installed in centralized mode.

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Figure 3-17 Minimum installation clearance for multiple RRUs installed in centralized mode

Recommended Clearance for Multiple RRUs Installed on a Wall in Standard Mode

Figure 3-18 shows the recommended clearance for multiple RRUs installed on a wall in standard mode.

Figure 3-18 Recommended clearance for multiple RRUs installed on a wall in standard mode

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Minimum Clearance for Multiple RRUs Installed on a Wall in Standard Mode

Figure 3-19 shows the minimum clearance for multiple RRUs installed on a wall in standard mode.

Figure 3-19 Minimum clearance for multiple RRUs installed on a wall in standard mode

Recommended Clearance for Multiple RRUs Side-Mounted on a Wall

Figure 3-20 shows the recommended clearance for multiple RRUs side-mounted on a wall.

Figure 3-20 Recommended clearance for multiple RRUs side-mounted on a wall

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