Huawei Technologies QISRRU3952-850M RemoteRadio Unit User Manual

RRU3952 (850M)

Installation Guide

Issue

Date

Draft A

2014-12-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2014. 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 a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address:

Website:

Email:

Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China http://www.huawei.com

[email protected]

Issue Draft A (2014-12-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

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RRU3952 (850M)

Installation Guide About This Document

About This Document

Purpose

This document describes the process of installing a DC blade RRU3952(850M) (referred to as

RRU in this document).

Product Versions

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

Product Name

DBS3900

Solution Version l SRAN8.0 and later versions l GBSS15.0 and later versions l RAN15.0 and later versions l eRAN6.0 and later versions

Product Version

V100R008C00 and later versions

Intended Audience

This document is intended for:

Base station installation engineers

Organization

1 Changes in RRU3952(850M) Installation Guide

This section describes the changes in the RRU3952(850M) Installation Guide.

2 Installation Preparations



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RRU3952 (850M)


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, indicators, installation options and installation clearance requirements.

4 Unpacking the Equipment

This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact.

5 Installation Process

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

6 (Optional) Installing the Plastic Shells of the RRU

This section describes the procedure for installing the plastic shells of the RRU.

7 Hoisting an RRU and Related Cables onto a Tower

This section describes the procedure for hoisting an RRU and related cables onto a tower and the precautions that must be taken.

8 Installing the RRU

This chapter describes the procedure for installing the RRU. The procedure for installing the

RRU varies depending on installation options.

9 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

10 Checking the RRU Hardware Installation

After an RRU is installed, check the hardware installation.

11 Powering On an RRU

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

12 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.



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RRU3952 (850M)


Symbol Description

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

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

NOTICE is used to address practices not related to personal injury.

Calls attention to important information, best practices and tips.

NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration.

General Conventions

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

Convention

Times New Roman

Boldface

Italic

Courier New

Description

Normal paragraphs are in Times New Roman.

Names of files, directories, folders, and users are in boldface . For example, log in as user root .

Book titles are in italics .

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

Boldface

Italic

Description

The keywords of a command line are in boldface .

Command arguments are in italics .



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RRU3952 (850M)


Convention

[ ]

{ x | y | ... }

[ x | y | ... ]

{ x | y | ... }

[ x | y | ... ] *

*

Description

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

Optional items are grouped in braces and separated by vertical bars. One item is selected.

Optional items are grouped in brackets and separated by vertical bars. One item is selected or no item is selected.

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.

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

Boldface

>

Description

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.

Format

Key

Key 1 + Key 2

Key 1 , Key 2

Description

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

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

+ A means the three keys should be pressed concurrently.

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.



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Installation Guide

Action

Click

Double-click

Drag

About This Document

Description

Select and release the primary mouse button without moving the pointer.

Press the primary mouse button twice continuously and quickly without moving the pointer.

Press and hold the primary mouse button and move the pointer to a certain position.



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Installation Guide Contents

Contents

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

1 Changes in RRU3952(850M) Installation Guide.....................................................................1

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

2.1 Reference Documents.....................................................................................................................................................3

2.2 Tools and Instruments....................................................................................................................................................3

2.3 Skills and Requirements for Onsite Personnel...............................................................................................................5

3 Information About the Installation...........................................................................................6

3.1 RRU Exterior..................................................................................................................................................................7

3.2 RRU Ports.......................................................................................................................................................................8

3.3 RRU Indicators.............................................................................................................................................................10

3.4 Installation Scenarios....................................................................................................................................................12

3.5 Installation Clearance Requirements of an RRU..........................................................................................................23

3.5.1 Clearance for a Single RRU......................................................................................................................................23

3.5.2 Clearance for Three or More RRUs...........................................................................................................................28

3.5.3 Installation Spacing Between RRUs..........................................................................................................................31

4 Unpacking the Equipment.........................................................................................................34

5 Installation Process.....................................................................................................................36

6 (Optional) Installing the Plastic Shells of the RRU..............................................................37

7 Hoisting an RRU and Related Cables onto a Tower............................................................40

7.1 Hoisting an RRU onto a Tower....................................................................................................................................41

7.2 Hoisting Fiber Optic Cables onto a Tower...................................................................................................................44

7.3 Hoisting Power Cables onto a Tower...........................................................................................................................47

8 Installing the RRU.......................................................................................................................50

8.1 Mounting Kits for an RRU...........................................................................................................................................51

8.2 Installing the RRU on a Pole........................................................................................................................................52

8.2.1 Installing a Single RRU.............................................................................................................................................52

8.2.2 Installing Two RRUs.................................................................................................................................................55

8.2.3 Installing Three or More RRUs.................................................................................................................................61

8.3 Installing an RRU on U-steel .......................................................................................................................................66



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8.4 Installing an RRU on Angle Steel................................................................................................................................71

8.5 Installing an RRU on a Wall.........................................................................................................................................76

8.6 Installing an RRU on an IFS06.....................................................................................................................................82

9 Installing RRU Cables................................................................................................................89

9.1 Cabling Requirements..................................................................................................................................................91

9.2 RRU Cable Connections...............................................................................................................................................97

9.3 Installing RRU Cables................................................................................................................................................102

9.4 RRU Cables................................................................................................................................................................103

9.5 Installing an RRU PGND Cable.................................................................................................................................105

9.6 Installing an RRU RF Jumper....................................................................................................................................106

9.7 Installing an Inter-RRU RF Cable..............................................................................................................................109

9.8 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable...................................................................110

9.9 Installing an RRU Alarm Cable..................................................................................................................................112

9.10 Opening the Cover Plate of an RRU Cabling Cavity...............................................................................................114

9.11 Installing a CPRI Optical Cable...............................................................................................................................115

9.12 Installing an RRU Power Cable................................................................................................................................117

9.13 Closing the Cover Plate of an RRU Cabling Cavity................................................................................................120

10 Checking the RRU Hardware Installation..........................................................................122

11 Powering On an RRU.............................................................................................................123

12 Appendix...................................................................................................................................125

12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side......................126



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RRU3952 (850M)

Installation Guide 1 Changes in RRU3952(850M) Installation Guide

1

Changes in RRU3952(850M) Installation

Guide

This section describes the changes in the RRU3952(850M) Installation Guide.

Draft A (2015-01-15)

This is a draft.



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RRU3952 (850M)

Installation Guide 2 Installation Preparations

2

Installation 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

You must prepare the following tools and instruments 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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2.1 Reference Documents

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

The following reference documents are required during RRU installation: l RRU3952(850M) Hardware Description l DBS3900 Installation Guide l OCB User Guide l OCB-01M User Guide

2.2 Tools and Instruments

You must prepare the following tools and instruments before the installation.

Hammer drill (a φ12 bit) ESD gloves Vacuum cleaner

Heat gun

Rubber mallet

Phillips screwdriver (M3 to

M6)

Flat-head screwdriver (M3 to

M6)

COAX crimping tool Wire stripper



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Utility knife

Level

Multimeter

Cable cutter

Torque screwdriver

2 Installation Preparations

Adjustable wrench (size ≥ 32 mm [1.26 in.])

Torque wrench

Size: 16 mm (0.63 in.) and 32 mm (1.26 in.)

Combination wrench

Size: 16 mm (0.63 in.) and 32 mm (1.26 in.)

Torque socket

5 mm

5 mm

(M3 to M6)

(M3 to M6)

Marker (diameter ≤ 10 mm

[0.39 in.])

Measuring tape

Inner hexagon wrench Fixed pulley

5 mm

Hydraulic pliers -

Lifting sling



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RRU3952 (850M)


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: 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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RRU3952 (850M)

Installation Guide 3 Information About the Installation

3

Information About the Installation


Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation options 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 ports 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 of the RRU.

3.4 Installation Scenarios

An RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios must meet heat-dissipation and waterproofing requirements of the RRU.

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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RRU3952 (850M)


3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

Figure 3-1

shows the exterior of an RRU.

Figure 3-1 RRU exterior

Figure 3-2

shows RRU dimensions.

Figure 3-2 RRU dimensions

You can obtain the RRU frequency band and power supply information from the configuration label on the cover plate and obtain the RRU name from the nameplate on the side of RRU that

accommodates the conversion bracket. Figure 3-3 shows the positions of the configuration label

and nameplate on the RRU.



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NOTE

The actual label and nameplate may differ from what is shown in the figure.

Figure 3-3 Positions of the label and nameplate

(1) Configuration label

(4) Power supply module

(2) Nameplate

(5) Module name -

(3) Frequency band

3.2 RRU Ports

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

Figure 3-4

shows the ports on the RRU panels.



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Figure 3-4 Ports on the RRU1 panels

3 Information About the Installation

Table 3-1

describes ports and indicators on the RRU panels.

Table 3-1 Ports and indicators on the RRU panels

Item

(1) Bottom ports

Silkscreen

ANT_TX/RXA

Remarks

TX/RX port A, supporting RET signal transmission

ANT_TX/RXB TX/RX port B, supporting RET signal transmission

ANT_RXC

ANT_RXD

EXT_ALM

TX/RX port C

TX/RX port D

Alarm monitoring port used for monitoring one RS485 signal and two dry contact signals



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Item Silkscreen

RET

RX_IN/OUT

(2) Ports in the cabling cavity

RTN(+)

NEG(-)

CPRI0

(3) Indicator

CPRI1

RUN

ALM

ACT

VSWR

CPRI0

CPRI1


Remarks

Communication port for the RET antenna, supporting RET signal transmission

Interconnection port

Power supply socket, for details about RRU power cable experience and specifications, see RRU Power Cable.

Optical/electrical port 0, connected to the

BBU

Optical/electrical port 1, connected to the

BBU

For details, see 3.3 RRU Indicators .

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

l Connect the CPRI0 port to the BBU by default in the single-mode scenario.

3.3 RRU Indicators

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

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

Table 3-2

describes RRU indicators.

Table 3-2 RRU Indicators

Indicator Color

RUN Green

Status

Steady on

Steady off

Meaning

The power input is available, but the board is faulty.

No power input is available or the board is faulty.



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Indicator

ALM

ACT

VSWR

CPRI0

CPRI1

Color

Red

Green

Red

Red and green

Red and green

Status

Blinking (on for

1s and off for 1s)

Meaning

The board is running properly.

Blinking (on for

0.125s and off for

0.125s)

Steady on

The board software is being loaded or the board is not working.

Alarms are generated, and the module must be replaced.

Blinking (on for

1s and off for 1s)

Steady off

Steady on

Blinking (on for

1s and off for 1s)

Steady off

Alarms are generated. The alarms may be caused by faults on the related board or ports.

Therefore, you need to locate the fault before deciding whether to replace the module.

No alarms are generated.

The board is working properly when TX channels are enabled or software is being loaded to a board that is not started.

The board is running with TX channels disabled.

No voltage standing wave ratio (VSWR) alarm is generated.

Blinking (on for

1s and off for 1s)

Steady on

Blinking (on for

0.125s and off for

0.125s)

VSWR alarms are generated on the

ANT_TX/RXA and ANT_TX/RXB ports.

Steady green

Steady red


ANT_TX/RXB port.


ANT_TX/RXA port.

Blinking red (on for 1s and off for

1s)

The CPRI link is running properly.

An optical module fails to receive or transmit signals possibly because the optical module is faulty or the optical fiber is broken.

The CPRI link is out of lock because of faults on the mutual lock of dual-mode clock sources or mismatched data rates on CPRI ports.

Steady off

Steady green

The optical module cannot be detected or is powered off.

The CPRI link is running properly.



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Indicator Color Status

Steady red

Blinking red (on for 1s and off for

1s)

Steady off

Meaning

An optical module fails to receive or transmit signals possibly because the optical module is faulty or the optical fiber is broken.

The CPRI link is out of lock because of faults on the mutual lock of dual-mode clock sources or mismatched data rates on CPRI ports.

The optical module cannot be detected or is powered off.

3.4 Installation Scenarios

An RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios must meet heat-dissipation and waterproofing requirements of the RRU.

Requirements for the Installation Scenarios

Application scenarios:

To ensure proper heat dissipation of the RRU, the following requirements must be met: l The RRU cannot be installed in an enclosed cabinet without a cooling system.

l The RRU cannot be installed in an enclosed camouflage box.

l The RRU cannot be installed in an enclosed equipment room without a cooling system.

l When multiple RRUs are installed in centralized mode, the minimum clearance

requirements must be met. For details about the minimum clearance requirements, see 3.5.2

Clearance for Three or More RRUs and

3.5.3 Installation Spacing Between RRUs .

l RRU mounting kits in assembled installation mode are not allowed in indoor scenarios.

NOTICE

If the RRU is inappropriately installed, heat dissipation of the RRU deteriorates and the RRU may not work properly, as shown in

Figure 3-5

.



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Installation Guide

Figure 3-5 inappropriately installed RRU


Correct installation methods: l The installation supports' specifications described in this document are only based on the exterior and dimensions of the mounting kits. Before installing equipment, assess the strength and reliability of the installation support to determine whether it can bear the weight of the equipment.

l If an AC RRU consists of a 18 L blade RRU and an OPM15M, this AC RRU cannot be installed in side-mounted mode.

l To ensure the heat dissipation of the RRU and waterproofing of the ports at the bottom of the RRU, the vertical deviation angle of an RRU must be less than or equal to 10 degrees, as shown

Figure 3-6

.

l On a tower, an RRU can be installed on a pole, angle steel, or U-steel. The side-mounted installation mode (one side instead of the rear of an RRU is mounted on the support) is recommended for RRUs on the main pole secured on a tower. This installation mode allows multiple RRUs to be installed next to each other at the same level on a pole. When the horizontal distance between the main and auxiliary poles on a tower is equal to or greater than 810 mm (23.62 in.), the side-mounted mode is recommended for installing RRUs on the auxiliary pole to meet the minimum clearance requirements. Otherwise, the standard mode is recommended for installing RRUs on the auxiliary pole.



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RRU3952 (850M)


Figure 3-6 Requirements for the vertical deviation angle of an RRU

(1) RRU (2) Installation support (pole, U-steel, angle steel, or wall)

Installing an RRU on a Pole

Figure 3-7

shows the diameter of a pole for installing an RRU.

Figure 3-7 Diameter of a pole

NOTICE l 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.).

l When the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of three RRUs can be installed on the pole and the side-mounted installation is recommended.

l Only a pole whose diameter ranges from 76 mm (2.99 in.) to 114 mm (4.49 in.) supports more than three RRUs.

l The recommended thickness of the pole wall is 3.5 mm (0.14 in.) or above.

Figure 3-8

shows a single RRU installed on a pole.



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Figure 3-8 A single RRU installed on a pole


Figure 3-9

shows two RRUs installed on a pole.

Figure 3-9 Two RRUs installed on a pole

Figure 3-10

,

Figure 3-11

, and

Figure 3-12

show multiple RRUs installed on a pole.



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Figure 3-10 Three RRUs installed on a pole


Figure 3-11 Four RRUs installed on a pole



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Figure 3-12 Six RRUs installed on a pole


Installing an RRU on U-Steel

Figure 3-13

shows U-steel specifications.

Figure 3-13 U-steel specifications

NOTICE

U-steel only supports the standard or reverse installation of a single RRU.

Figure 3-14

shows an RRU installed on U-steel.



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Figure 3-14 RRU installed on U-steel


Installing an RRU on Angle Steel

Figure 3-15

shows angle steel specifications.

Figure 3-15 Angle steel specifications

NOTICE

Angle steel only supports the standard or reverse installation of a single RRU.

Figure 3-16

shows an RRU installed on angle steel.



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Installation Guide

Figure 3-16 RRU installed on angle steel


Installing an RRU on a Wall

The wall for installing RRUs must meet the following requirements: l For each RRU, the wall must be able to bear a weight four times heavier than the RRU's weight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

l Expansion bolts must be tightened to 30 N•m to ensure that the bolts work properly and the wall remains intact.

NOTICE l The standard installation is recommended for RRUs installed on a wall.

l When RRUs are installed on a wall in side-mounted mode, do not combine mounting brackets

for multiple RRUs, as shown in Figure 3-17 .

Figure 3-17 Correct installation of mounting brackets for multiple RRUs installed on a wall in side-mounted mode



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RRU3952 (850M)

Installation Guide

Figure 3-18

shows an RRU installed on a wall.

Figure 3-18 RRU installed on a wall


Installing an RRU on an IFS06 l The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for heights of RRUs.

l The IFS06 supports at least three RRUs when the ambient temperature is higher than or equal to the lowest operating temperature of the RRUs and at least 5°C (41°F) lower than the highest operating temperature of the RRUs. The IFS06 supports a maximum of six

RRUs when the ambient temperature is higher than or equal to the lowest operating temperature of the RRUs and at least 10°C (50°F) lower than the highest operating temperature of the RRUs.

NOTE

For details about the operating temperature of the RRUs, see section "Technical Specifications of

RRUs" in 3900 Series Base Station Technical Description .

NOTICE

The mounting brackets for multiple RRUs cannot be combined when the RRUs are installed on

an IFS06, as shown in Figure 3-19 .



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RRU3952 (850M)


Figure 3-19 Correct installation of mounting brackets for RRUs installed on an IFS06

Figure 3-20

and

Figure 3-21

show RRUs installed on an IFS06.



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Installation Guide

Figure 3-20 Three RRUs installed on an IFS06


(1) Height-restricted scenario (2) Height-unrestricted scenario



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Installation Guide

Figure 3-21 Six RRUs installed on an IFS06


(1) Height-restricted scenario (2) Height-unrestricted scenario

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.

3.5.1 Clearance for a Single RRU

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



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RRU3952 (850M)


NOTICE

If an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm or more as recommended) away from the bitumen ground. The following describes the space requirements for installing a single RRU on the non-bitumen ground.

NOTE l The recommended clearances ensure normal running and provide appropriate space for operation and maintenance (O&M). If the installation space is sufficient, leave the recommended clearances after installing the equipment.

l The minimum clearance ensures normal running and heat dissipation, but O&M activities such as checking indicator status and opening the cabling cavity cannot be properly conducted. If the installation space is restricted, leave the minimum clearance after installing the equipment.

Clearance for a Single RRU in Side-Mounted Mode

Figure 3-22

shows the clearance for a single RRU in side-mounted mode.



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RRU3952 (850M)


Figure 3-22 Clearance for a single RRU in side-mounted mode

Clearance for a Single RRU in Standard or Reverse Mode

Figure 3-23

shows the clearance for a single RRU in standard or reverse mode.



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RRU3952 (850M)


Figure 3-23 Clearance for a single RRU in standard or reverse mode

Clearance for a Single Tower-Mounted RRU

Figure 3-24 and Figure 3-25

show the minimum clearances for a single RRU in side-mounted mode and standard or reverse mode on a tower.



26

RRU3952 (850M)


Figure 3-24 Minimum clearance for a single RRU in side-mounted mode on a tower

Figure 3-25 Minimum clearance for a single RRU in standard or reverse mode on a tower



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RRU3952 (850M)


3.5.2 Clearance for Three or More RRUs

This section describes the recommended and minimum clearances for three or more RRUs.

NOTICE

If an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm or more as recommended) away from the bitumen ground. The following describes the space requirements for installing multiple RRUs on the non-bitumen ground.

NOTE l The recommended clearances ensure normal running and provide appropriate space for operation and maintenance (O&M). If the installation space is sufficient, leave the recommended clearances after installing the equipment.

l The minimum clearance ensures normal running and heat dissipation, but O&M activities such as checking indicator status and opening the cabling cavity cannot be properly conducted. If the installation space is restricted, leave the minimum clearance after installing the equipment.

Recommended Clearances for Three or More RRUs Installed in Centralized Mode

Figure 3-26

shows the recommended clearances for three or more RRUs installed in centralized mode.

Figure 3-26 Recommended clearances for three or more RRUs installed in centralized mode



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RRU3952 (850M)


Minimum Clearances for Three or More RRUs Installed in Centralized Mode

Figure 3-27

shows the minimum clearances for three or more RRUs installed in centralized mode.

Figure 3-27 Minimum clearances for three or more RRUs installed in centralized mode

Recommended Clearances for Three or More RRUs Installed in Standard Mode on a Wall

Figure 3-28

shows the recommended clearances for three or more RRUs installed in standard mode on a wall.



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RRU3952 (850M)


Figure 3-28 Recommended clearances for three or more RRUs installed in standard mode on a wall

Minimum Clearances for Three or More RRUs Installed in Standard Mode on a

Wall

Figure 3-29 shows the minimum clearances for three or more RRUs installed in standard mode

on a wall.

Figure 3-29 Minimum clearances for three or more RRUs installed in standard mode on a wall



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RRU3952 (850M)


Recommended Clearances for Three or More RRUs Installed in Side-Mounted

Mode on a Wall

Figure 3-30

shows the recommended clearances for three or more RRUs installed in sidemounted mode on a wall.

Figure 3-30 Recommended clearances for three or more RRUs installed in side-mounted mode on a wall

3.5.3 Installation Spacing Between RRUs

This section describes the horizontal and vertical spacing between RRUs.

Recommended Horizontal Spacing Between RRUs

Figure 3-31

shows the recommended horizontal spacing between RRUs.

Figure 3-31 Recommended horizontal spacing between RRUs



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RRU3952 (850M)


Minimum Horizontal Spacing Between RRUs

Figure 3-32

shows the minimum horizontal spacing between RRUs.

Figure 3-32 Minimum horizontal spacing between RRUs

Recommended Vertical Spacing Between RRUs

Figure 3-33

shows the recommended vertical spacing between RRUs.

Figure 3-33 Recommended vertical spacing between RRUs



32

RRU3952 (850M)


Minimum Vertical Spacing Between RRUs

Figure 3-34

shows the minimum vertical spacing between RRUs.

Figure 3-34 Minimum vertical spacing between RRUs



33

RRU3952 (850M)

Installation Guide 4 Unpacking the Equipment

4

Unpacking the Equipment

This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact.

Context

NOTE

When transporting, moving, or installing the equipment, components, or parts, you must: l Prevent them from colliding with doors, walls, shelves, or other objects.

l Wear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweatsoaked gloves, or dirty gloves.

NOTICE l After a cabinet or an BBU is unpacked, it must be powered on within 7 days.

l After an RRU is unpacked, it must be powered on within 24 hours.

Procedure

Step 1 Check the total number of articles in each case according to the packing list.

If ...

Then ...

The total number tallies with the packing list

Go to

Step 2

.

The total number does not tally with the packing list

Find out the cause and report any missing articles to the local Huawei office.

Step 2 Check the exterior of the packing case.



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RRU3952 (850M)

Installation Guide 4 Unpacking the Equipment

If ...

The outer packing is intact

Then ...

Go to

Step 3

.

The outer packing is severely damaged or soaked

Find out the cause and report it to the local

Huawei office.

Step 3 Check the type and quantity of the equipment in the cases according to the packing list.

If ...

Then ...

Types and quantity of the article tally with those on the packing list

Sign the Packing List with the customer.

Either shipment shortage, wrong shipment or damaged articles.

Report to the local Huawei office.

CAUTION l To protect the equipment and prevent damage to the equipment, you are advised to keep the unpacked equipment and packing materials indoors, take photos of the stocking environment, packing case or carton, packing materials, and any rusted or eroded equipment, and then file the photos.

l Verify that the insulation layers of all RRU cables are intact. If the insulation layers are damaged or broken, water will penetrate into the cables, which may cause damages to RRUs or human injury.

----End



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RRU3952 (850M)

Installation Guide 5 Installation Process

5

Installation Process

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

Figure 5-1

shows the installation process.

Figure 5-1 Process of installing an RRU



36

RRU3952 (850M)

Installation Guide 6 (Optional) Installing the Plastic Shells of the RRU

6

(Optional) Installing the Plastic Shells of the

RRU

This section describes the procedure for installing the plastic shells of the RRU.

Context

An RRU is equipped with a plastic shell only when necessary.

Procedure

Step 1 Use an M6 Phillips screwdriver to loosen the two screws on the metal sheet of the RRU and

remove the metal sheet, as shown in Figure 6-1 .

Figure 6-1 Removing the metal sheet

(1) Screw

Issue Draft A (2014-12-30)

(2) Metal sheet

Huawei Proprietary and Confidential


37

RRU3952 (850M)

Installation Guide

Step 2 Install a buckle on each side at the bottom of the RRU, and use an M4 torque wrench to tighten

the screws on the buckles to 1.4 N·m (12.39 lbf·in.), as shown in Figure 6-2

.

Figure 6-2 Installing buckles at the bottom

6 (Optional) Installing the Plastic Shells of the RRU

(1) Buckle (2) Screw

Step 3 Use four hex screws to secure the plastic shells onto the RRU and use an M6 hex key wrench

to tighten the screws to 2.8 N·m (24.78 lbf·in.), as shown in Figure 6-3 .



38

RRU3952 (850M)

Installation Guide 6 (Optional) Installing the Plastic Shells of the RRU

Figure 6-3 Installing the plastic shells of the RRU

----End



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RRU3952 (850M)

Installation Guide 7 Hoisting an RRU and Related Cables onto a Tower

7

Hoisting an RRU and Related Cables onto a

Tower


This section describes the procedure for hoisting an RRU and related cables onto a tower and the precautions that must be taken.

7.1 Hoisting an RRU onto a Tower

This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or angle steel.

7.2 Hoisting Fiber Optic Cables onto a Tower

This section describes the procedure for hoisting fiber optic cables onto a tower and the precautions that must be taken.

7.3 Hoisting Power Cables onto a Tower

This section describes the procedure for hoisting power cables onto a tower and the precautions that must be taken.



40

RRU3952 (850M)


7.1 Hoisting an RRU onto a Tower

This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or angle steel.

Prerequisites

When the RRU is powered by an AC/DC power module, you need to install the AC/DC power module onto the RRU before hoisting them onto a tower. For detailed operations, see AC/DC

Power Module User Guide or OPM15M User Guide .

NOTICE l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.

l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage during the installation.

Procedure

Step 1 After climbing up to the tower, technician A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley.

Step 2 Technician C binds the mounting kits using the lifting sling and traction sling on the ground, as shown in

Figure 7-1

. Then technician B pulls the lifting sling downwards, and technician C pulls the traction sling outwards to protect the mounting kits from colliding with the tower.

Figure 7-1 Binding mounting kits for the RRU



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RRU3952 (850M)


(1) Lifting sling (2) Traction sling

Step 3 Technician A catches the mounting kits and then unties the slings.

Step 4 Install the mounting kits. For detailed operations, see steps 1 to 3 in

8.2.1 Installing a Single

RRU .

Step 5

Technician C binds the RRU using the lifting sling and traction sling, as shown in Figure 7-2 .

The binding methods in

Figure 7-3

and

Figure 7-4

are incorrect.

Figure 7-2 Binding the RRU

(1) Handle (2) Lifting sling

Figure 7-3 Incorrect binding method (1)

(3) Traction eye (4) Traction sling



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RRU3952 (850M)

Installation Guide

Figure 7-4 Incorrect binding method (2)

7 Hoisting an RRU and Related Cables onto a Tower

Step 6

Hoist the RRU onto the tower, as shown in Figure 7-5 . Technician B pulls the lifting sling

downwards, and technician C pulls the traction sling outwards to protect the RRU from colliding with the tower.

Figure 7-5 Hoisting the RRU onto the tower

(1) Lifting sling


(2) Fixed pulley



(3) Traction sling

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RRU3952 (850M)


NOTICE l The load-bearing capacity of each sling must be greater than 200 kg (441 lb) and the diameter of each sling must be less than 25 mm (0.98 in.).

l When hoisting each device onto a tower, protect them from colliding with the tower.

l Hoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.

l Do not hoist any thing by the traction eye.

Step 7 Technician A catches the RRU hoisted onto the tower.

Step 8 Technician A installs the RRU onto the main bracket and uses an inner hexagon torque screwdriver to tighten the captive screw into the hole of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.). For detailed operations, see steps 4 and 5 in

8.2.1 Installing a Single

RRU .

Step 9 Untie the lifting sling and traction sling.

NOTE

The procedure for hoisting the RRU and its mounting kits onto the tower is for your reference only.

----End

7.2 Hoisting Fiber Optic Cables onto a Tower

This section describes the procedure for hoisting fiber optic cables onto a tower and the precautions that must be taken.

Context

Cabling requirements for power cables are met. For details, see 9.1 Cabling Requirements

.

Procedure

Step 1

Hoist the fiber optic cables onto the tower, as shown in Figure 7-6 .



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RRU3952 (850M)


Figure 7-6 Hoisting fiber optic cables onto the tower

(1) Lifting sling (2) Fixed pulley (3) Traction sling

NOTICE

Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU or

BBU based on the labels on both ends of the cables and determine the hoisting direction.

1.

After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley.

2.

Installation engineer B places the fiber coiler for coiling fiber optic cables on the fiber spools, and installation engineer D lead the lifting sling through the stretch sling of the fiber optic cables and use the other sling as a traction sling to secure the cables 4 m (13.12 ft) away from the lifting sling, as shown in

Figure 7-7

.



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RRU3952 (850M)

Installation Guide

Figure 7-7 Binding fiber optic cables

7 Hoisting an RRU and Related Cables onto a Tower

(1) Lifting sling (2) Stretch sling (3) Traction sling

NOTICE

Do not remove the stretch sling and protection pipe or bind fiber optic cables using one

sling, as shown in Figure 7-8 .

Figure 7-8 Incorrect binding method

3.

Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m (49.21

ft) per minute to coil the fiber optic cables.

4.

Installation engineer C pulls the lifting sling downwards, and installation engineer D pulls the traction sling outwards to protect the fiber optic cables from colliding with the tower.



46

RRU3952 (850M)


Step 2 Secure the fiber optic cables to the tower vertically using cable clips.

Step 3 Remove the lifting sling, traction sling, and protection pipe.

NOTE

The procedure for hoisting the fiber optic cables onto the tower is for your reference only.

----End

7.3 Hoisting Power Cables onto a Tower

This section describes the procedure for hoisting power cables onto a tower and the precautions that must be taken.

Context

Cabling requirements for power cables are met. For details, see 9.1 Cabling Requirements

.

The procedure for adding a connector to the RRU power cable on the RRU side is done under the tower.

Procedure

Step 1 Hoist the power cables onto the tower, as shown in

Figure 7-9

.

Figure 7-9 Hoisting power cables onto the tower

(1) Lifting sling


(2) Fixed pulley



47

RRU3952 (850M)


1.

After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley.

2.

Installation engineer B secures three cable ties to the power cable connector, and then

secures the power cable to the lifting sling, as shown in Figure 7-10

.

NOTE

The connector on the power cable in the figure is only an example. The actual connector may vary according to the situation.

Figure 7-10 Binding cable ties

3.

Installation engineer B wraps the power cable connector with a layer of PVC insulation tape, as shown in

Figure 7-11

.

NOTE

Wrap the PVC insulation tape from 30 mm (1.18 in.) away from one end of the connector until it reaches the other end of the connector. The total length of the wrapped connector is 100 mm (3.94

in.).



48

RRU3952 (850M)


Figure 7-11 Wrapping the PVC insulation tape

4.

Installation engineer C pulls the lifting sling downwards, and installation engineer B pulls the other end of the lifting sling outwards to protect the power cables from colliding with the tower.

Step 2 Secure the power cables to the tower vertically using cable clips.

Step 3 Remove the cable ties, PVC insulation tape, and lifting sling.

NOTE

The procedure for hoisting the power cables onto the tower is for your reference only.

----End



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RRU3952 (850M)

Installation Guide 8 Installing the RRU

8

Installing the RRU


This chapter describes the procedure for installing the RRU. The procedure for installing the

RRU varies depending on installation options.

8.1 Mounting Kits for an RRU

This section describes the bracket assembly and the attachment plate for an RRU.

8.2 Installing the RRU on a Pole

One or more RRUs can be installed on a pole.

8.3 Installing an RRU on U-steel

This section describes the procedure and precautions for installing an RRU on U-steel. An RRU can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows only one RRU to be installed in standard or reverse mode.

8.4 Installing an RRU on Angle Steel

This section describes the procedure and precautions for installing an RRU on angle steel. An

RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel allows only one RRU to be installed in standard or reverse mode.

8.5 Installing an RRU on a Wall

This section describes the procedure and precautions for installing an RRU on a wall.

8.6 Installing an RRU on an IFS06

This section describes the procedure and precautions for installing an RRU on an IFS06.



50

RRU3952 (850M)


8.1 Mounting Kits for an RRU

This section describes the bracket assembly and the attachment plate for an RRU.

Figure 8-1

shows the front and side of an RRU.

Figure 8-1 Front and side view of an RRU

(1) Front view (2) Side view

Figure 8-2

shows the bracket assembly for an RRU.

Figure 8-2 18 L blade RRU mounting kit

(3) Attachment plate

(1) Plastic cap (2) Standard M10 nut (3) Spring washer (4) Thick flat washer (5) Square-neck bolt



51

RRU3952 (850M)


(6) Hoist clamp on the main bracket

(7) Main bracket (8) Inner hexagon screw

(9) Pole installation bracket

(10) Auxiliary bracket

8.2 Installing the RRU on a Pole

One or more RRUs can be installed on a pole.

8.2.1 Installing a Single RRU

This section describes the procedure and precautions for installing a single RRU on a pole.

Prerequisites

Before you install an RRU on a pole secured on a tower, the RRU and its mounting brackets are hoisted onto the tower. For details, see


.

The hoist clamp on the main bracket is secured properly.

NOTICE l Do not stand an RRU upright because the RF ports cannot support the weight of the RRU.

l Place a foam pad or cardboard under an RRU to protect the RRU housing from damage during the installation.

Procedure

Step 1 Determine a position for installing the mounting brackets.

l If the RRU is installed on a tower, determine a position for installing the mounting brackets according to the instructions in


.

l If the RRU is installed on the ground, determine a position for installing the mounting

brackets according to Figure 8-3 .



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RRU3952 (850M)

Installation Guide

Figure 8-3 Distance between the mounting brackets and the ground

8 Installing the RRU

NOTE

As shown in the figure above, it is recommended that the mounting kits be installed at a position

1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only

the 3.5 Installation Clearance Requirements of an RRU needs to be provided.

Step 2

Install the RRU mounting brackets, as shown in Figure 8-4 .

Figure 8-4 Installing the RRU mounting brackets

NOTE

Ensure that the arrows on the mounting brackets are pointing up.

1.

Adjust the position of the nut and remove the square-neck bolt at the open end from the slot on the auxiliary bracket.

2.

Slide the mounting brackets onto the pole horizontally and insert the square-neck bolt into the slot.



53

RRU3952 (850M)


Step 3 Use a 16 mm (0.63 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so that

the mounting brackets are secured onto the pole, as shown in Figure 8-5 .

NOTICE

Tighten the nuts on the two square-neck bolts simultaneously. After the main and auxiliary brackets are secured properly, measure the spacing between the brackets on both sides and ensure that the spacing is the same on the two sides.

Figure 8-5 Securing the RRU mounting brackets

(1) Plastic cap

Step 4

Install the RRU onto the main bracket, as shown in Figure 8-6

.



54

RRU3952 (850M)

Installation Guide

Figure 8-6 Installing the RRU onto the main bracket


Step 5 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in

Figure 8-7

.

Figure 8-7 Securing the captive screw into the connection hole

----End

8.2.2 Installing Two RRUs

This section describes the procedure and precautions for installing two RRUs on a pole.



55

RRU3952 (850M)

Installation Guide

Prerequisites





Procedure

Step 1 Install the first RRU onto the main bracket, as shown in

Figure 8-8

. For details, see 8.2.1

Installing a Single RRU

.

Figure 8-8 Installing the first RRU onto the main bracket

Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracket and pole installation brackets on the second set of mounting brackets, and remove the main

bracket, as shown in Figure 8-9 .



56

RRU3952 (850M)

Installation Guide

Figure 8-9 Removing the RRU main bracket


(1) Main bracket (2) Pole installation bracket

Step 3

Install the removed main bracket on one side of the first main bracket, as shown in Figure

8-10

.

NOTICE

The second main bracket must be installed, with the open ends of U-shaped slots on both sides facing downwards.

Figure 8-10 Installing the second main bracket

(1) Removed main bracket



57

RRU3952 (850M)


NOTE

The main mounting bracket for installing a blade RRU can connect to the main mounting bracket for

installing a common RRU in the scenarios of adding RRUs, as shown in Figure 8-11 .

Figure 8-11 Connect to the main mounting bracket for installing a common RRU

(1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU

Step 4

Install the second RRU onto the main bracket, as shown in Figure 8-12 .



58

RRU3952 (850M)

Installation Guide

Figure 8-12 Installing the second RRU onto the main bracket


NOTICE

After installing each RRU on its main bracket, use an inner hexagon torque screwdriver to tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.)

so that the attachment plate and main bracket are firmly secured, as shown in Figure 8-13



59

RRU3952 (850M)

Installation Guide



Step 5

Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 8-14 .

Figure 8-14 Installing the sheet metal tab

(1) Screw (2) Sheet metal tab

1.

Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from the handle of the second RRU and remove the screw.



60

RRU3952 (850M)


2.

Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to the handle of the second RRU. Then, rotate the sheet metal tab to align the vacant hole in the sheet metal tab with a hole on the top of the first RRU.

3.

Insert the removed screw into the hole on the top of the first RRU and use an M6 torque screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).

----End

8.2.3 Installing Three or More RRUs

This section describes the procedure and precautions for installing three or more RRUs on a pole.

Prerequisites




Context

A pole supports three, four, or six RRUs. The procedures for installing them are the same. The following provides an example for the procedure of installing four RRUs on a pole.

Procedure

Step 1

Install two RRUs, as shown in Figure 8-15

. For detailed installation process, see 8.2.2 Installing

Two RRUs .



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RRU3952 (850M)

Installation Guide

Figure 8-15 Two RRUs installed on a pole


Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracket and pole installation brackets on the second set of mounting brackets, and remove the main

bracket, as shown in Figure 8-16 .

Figure 8-16 Removing the RRU main bracket


Step 3 Install the third main bracket and install the third RRU onto the third main bracket. Then, use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket for the RRU to 5 N·m (44.25 lbf·in.), as shown in

Figure

8-17

.



62

RRU3952 (850M)


NOTICE

The third main bracket must be installed, with the open ends of U-shaped slots on both sides facing downwards.

Figure 8-17 Installing the third RRU onto the third main bracket

NOTE

The main mounting bracket for installing a blade RRU can connect to the main mounting bracket for

installing a common RRU in the scenarios of adding RRUs, as shown in Figure 8-18 .



63

RRU3952 (850M)


Figure 8-18 Connect to the main mounting bracket for installing a common RRU

(1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU

Step 4

Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 8-19 .

Figure 8-19 Installing the sheet metal tab

(1) Screw (2) Sheet metal tab

1.

Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from the handle of the first RRU and remove the screw.

2.

Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to the handle of the first RRU. Then, rotate the sheet metal tab to align the vacant hole in the sheet metal tab with a hole on the top of the third RRU.



64

RRU3952 (850M)


3.

Insert the removed screw into the hole on the top of the third RRU and use an M6 torque screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).

Step 5 Install the second set of RRU mounting brackets at least 80 mm (3.15 in.) above or below the first set of RRU mounting brackets, as shown in

Figure 8-20

.

Figure 8-20 Installing the second set of RRU mounting brackets

Step 6 Install the fourth RRU onto the fourth main bracket, use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in

Figure 8-21

.



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RRU3952 (850M)

Installation Guide

Figure 8-21 Installing the fourth RRU on the fourth main bracket


----End

8.3 Installing an RRU on U-steel

This section describes the procedure and precautions for installing an RRU on U-steel. An RRU can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows only one RRU to be installed in standard or reverse mode.

Prerequisites

Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets are hoisted onto the tower. For details, see


.




Context

Figure 8-22

shows the top view of an RRU installed on U-steel.



66

RRU3952 (850M)


NOTICE

When the width of the narrower edges of the U-steel is less than 40 mm (1.57 in.), only the a and b modes are supported.

Figure 8-22 Top view of an RRU

(1) U-steel

Procedure


l If the RRU is installed on a tower, determine a position for installing the mounting brackets according to the instructions in


.

l If the RRU is installed on the ground, determine a position for installing the mounting brackets according to the instructions in

Figure 8-23

.



67

RRU3952 (850M)

Installation Guide



NOTE




Step 2



NOTE


1.




68

RRU3952 (850M)


2.

Slide the mounting brackets onto the U-steel horizontally and insert the square-neck bolt into the slot.

Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so that

the mounting brackets are secured onto the U-steel, as shown in Figure 8-25 .

NOTICE

Tighten the nuts on the two square-neck bolts simultaneously. After the main and auxiliary brackets are secured properly, measure the spacing between the brackets on both sides and ensure that the spacing is the same on the two sides.


(1) Plastic cap

Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the

RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws to 5 N·m (44.25 lbf·in.), as shown in

Figure 8-26

.



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RRU3952 (850M)

Installation Guide

Figure 8-26 Installing the attachment plate onto the rear of the RRU


Step 5

Install the RRU onto the main bracket, as shown in Figure 8-27 .



Figure 8-28

.



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RRU3952 (850M)

Installation Guide



----End

8.4 Installing an RRU on Angle Steel

This section describes the procedure and precautions for installing an RRU on angle steel. An

RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel allows only one RRU to be installed in standard or reverse mode.

Prerequisites

Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets are hoisted onto the tower. For details, see


.




Context

Figure 8-29

shows the top view of an RRU installed on angle steel.



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RRU3952 (850M)

Installation Guide

Figure 8-29 Top view of an RRU


(1) Angle steel

Procedure


l If the RRU is installed on angle steel secured on a tower, determine a position for installing

the mounting brackets according to the instructions in 3.5.1 Clearance for a Single

RRU .

l If the RRU is installed on angle steel secured on the ground, determine a position for

installing the mounting brackets according to Figure 8-30 .




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RRU3952 (850M)


NOTE




Step 2



NOTE


1.


2.

Slide the mounting brackets onto the angle steel horizontally and insert the square-neck bolt into the slot.

Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so that the mounting brackets are secured onto the angle steel, as shown in

Figure 8-32

.

NOTICE

Tighten the nuts on the two square-neck bolts synchronously. After the main and auxiliary brackets are secured properly, measure the spacing between the brackets on both sides and ensure that the spacing is the same on the two sides.



73

RRU3952 (850M)

Installation Guide



(1) Plastic cap



Figure 8-33

.




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RRU3952 (850M)

Installation Guide

Step 5





Figure 8-35

.




75

RRU3952 (850M)


----End

8.5 Installing an RRU on a Wall

This section describes the procedure and precautions for installing an RRU on a wall.

Prerequisites




Context

The wall on which RRUs are installed must meet the following requirements: l For each RRU, the wall must be able to bear a weight four times heavier than the RRU's weight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

l Expansion bolts must be tightened to 30 N·m to ensure that the bolts work properly and the wall remains intact.

Procedure

Step 1 Disassemble the RRU mounting brackets, as shown in

Figure 8-36

.



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RRU3952 (850M)

Installation Guide

Figure 8-36 Disassembling the RRU mounting brackets


(1) Main bracket

(5) Flat washer

(2) Square-neck bolt

(6) Spring washer


(7) Nut


(8) Plastic screw cap

1.

Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws on the pole installation bracket, and remove the main bracket from the pole installation bracket.

2.

Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove the plastic screw cap, nuts, spring washers, flat washers, square-neck bolts, and pole installation bracket from the auxiliary bracket.

Step 2 Place the pole installation bracket against the wall, use a level to verify that the pole installation

bracket is placed horizontally, and then mark anchor points with a marker, as shown in Figure

8-37

.



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RRU3952 (850M)

Installation Guide

Figure 8-37 Marking anchor points


(1) Level (2) Pole installation bracket (3) RRU

NOTE

As shown in the figure above, it is recommended that the pole installation bracket be installed at a position

1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only the

3.5 Installation Clearance Requirements of an RRU

needs to be provided.

Step 3

Drill holes at the anchor points, and then insert expansion anchor bolts, as shown in Figure

8-38

.

Figure 8-38 Drilling holes and inserting expansion anchor bolts

(1) M10×80 bolt


(2) Nut (3) Spring washer (4) Flat washer (5) Expansion sleeve



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RRU3952 (850M)


1.

Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points with the depth ranging from 55 mm (2.17 in.) to 60 mm (2.36 in.), use a vacuum cleaner to clear the dust out from inside and around the holes, and measure the distances between holes. If any of the hole is beyond the acceptable range, mark a new anchor point and drill a new hole.

NOTICE

Take proper safety measures to protect your eyes and respiratory tract against the dust before drilling holes.

2.

Tighten the expansion anchor bolts slightly and place one vertically into each hole.

3.

Use a rubber mallet to pound the expansion anchor bolt until it goes into the hole completely.

4.

Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer, and flat washer in sequence.

NOTICE

After dismantling an expansion anchor bolt, ensure that the top of the expansion sleeve is on the same level as the wall. Otherwise, the device cannot be installed on the wall evenly and securely.

Step 4 Install the pole installation bracket on the expansion anchor bolts, place the flat washers, spring washers, and nuts through the expansion anchor bolts in sequence, and then use a 16 mm (0.63

in.) torque socket to tighten the nuts to 30 N·m (265.52 lbf·in.), as shown in Figure 8-39 .

Figure 8-39 Installing the pole installation bracket on the expansion anchor bolts



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RRU3952 (850M)


NOTICE

Ensure that the arrows on the pole installation bracket are pointing up.

Step 5 Install the main bracket onto the pole installation bracket using four M6x16 inner hexagon screws, and use an inner hexagon torque screwdriver to tighten the inner hexagon screws to 5

N·m (44.25 lbf·in.) so that the main bracket and pole installation bracket are firmly secured, as shown in

Figure 8-40

.

Figure 8-40 Installing the main bracket




Figure 8-41

.



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Installation Guide



Step 7




Figure 8-43

.



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Installation Guide



----End

8.6 Installing an RRU on an IFS06

This section describes the procedure and precautions for installing an RRU on an IFS06.

Prerequisites




Context l The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for heights of RRUs.

l RRUs can be installed on an IFS06 when the ambient temperature is higher than or equal to the lowest operating temperature of the RRUs and at least 5°C (41°F) lower than the highest working temperature of the RRU. In this scenario, the IFS06 supports at least three

RRUs. The IFS06 supports a maximum of six RRUs when the ambient temperature is higher



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Installation Guide 8 Installing the RRU than or equal to the lowest operating temperature of the RRUs and at least 10°C (50°F) lower than the highest operating temperature of the RRU.

NOTE

For details about the operating temperature of the RRUs, see section "Technical Specifications of

RRUs" in 3900 Series Base Station Technical Description .

l Install RRUs in the sequence from bottom to top and from left to right.

l This section describes how to install an RRU in height-unrestricted scenarios. The procedure for installing an RRU in height-restricted scenarios is the same as that in heightunrestricted scenarios.

l When installing the pole installation bracket, you need to use the M10x50 bolts delivered with the IFS06.

l Rubber washers are easily compressed or broken, whereas do not need to be replaced.

Procedure

Step 1 Disassemble the RRU mounting brackets, as shown in

Figure 8-44

.

Figure 8-44 Disassembling the RRU mounting brackets

(1) Main bracket

(5) Flat washer

(2) Square-neck bolt

(6) Spring washer


(7) Nut


(8) Plastic screw cap

1.

Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws on the pole installation bracket, and remove the main bracket from the pole installation bracket.

2.

Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove the plastic screw cap, nuts, spring washers, flat washers, square-neck bolts, and pole installation bracket from the auxiliary bracket.

Step 2 Use the M10x50 bolts delivered with the IFS06 to secure the pole installation bracket to the

IFS06, and then use an M10 torque socket wrench to secure the bolts to 30 N·m (265.52 lbf·in.).



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RRU3952 (850M)


NOTICE

Ensure that the arrows on the pole installation bracket are pointing up.

Install the pole installation bracket, as shown in

Figure 8-45

.

Figure 8-45 Installing the pole installation bracket in height-unrestricted scenarios

(1) Spring washer (2) Rubber washer

Step 3 Attach the main bracket to the pole installation bracket, and use an inner hexagon screwdriver to tighten four M6x16 screws to 5 N·m (44.25 lbf·in.) so that the main bracket and pole installation bracket are firmly secured, as shown in

Figure 8-46 .



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Installation Guide

Figure 8-46 Installing the main bracket



Step 4 Attach the RRU to the main bracket, and then use an inner hexagon screwdriver to tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so

that the attachment plate and main bracket are firmly secured, as shown in Figure 8-47

.



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Installation Guide



Step 5

Install the RRUs on the lower level from left to right, as shown in Figure 8-48 .



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Figure 8-48 Installing RRUs on the lower level


Step 6 Optional: Optional: When the ambient temperature is equal to or higher than the lowest operating temperature of the RRU and at least 10°C (10°F) lower than the highest operating temperature of the RRU, repeat the preceding steps to install the RRUs on the higher level, as shown in

Figure 8-49

.



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Installation Guide

Figure 8-49 Installing RRUs on the higher level


----End



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RRU3952 (850M)

Installation Guide 9 Installing RRU Cables

9

Installing RRU Cables



9.1 Cabling Requirements

Cables must be routed according to the specified cabling requirements to prevent signal interference.

9.2 RRU Cable Connections

This section describes RRU cable connections.

9.3 Installing RRU Cables


9.4 RRU Cables


9.5 Installing an RRU PGND Cable

This section describes the procedure for installing an RRU PGND cable.

9.6 Installing an RRU RF Jumper

This section describes the procedure for installing an RRU RF jumper.

9.7 Installing an Inter-RRU RF Cable

This section describes the procedure for installing an inter-RRU RF cable.

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

This section describes the procedures for installing an RRU AISG multi-wire cable and AISG extension cable.

9.9 Installing an RRU Alarm Cable

This section describes the procedure for installing an RRU alarm cable.

9.10 Opening the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for opening the cover plate of an RRU cabling cavity.

9.11 Installing a CPRI Optical Cable

This section describes the procedure for installing a CPRI optical cable.

9.12 Installing an RRU Power Cable



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RRU3952 (850M)


This section describes the procedure for installing an RRU power cable.

9.13 Closing the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for closing the cover plate of an RRU cabling cavity.



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RRU3952 (850M)


9.1 Cabling Requirements

Cables must be routed according to the specified cabling requirements to prevent signal interference.

NOTE

If a cable listed below is not required, skip the routing requirements of the cable.

General Cabling Requirements

Requirements for Bending Radius l The bending radius of the 7/8'' feeder must be more than 250 mm (9.84 in.), and the bending radius of the 5/4'' feeder must be more than 380 mm (14.96 in.).

l The bending radius of the 1/4'' jumper must be more than 35 mm (1.38 in.). The bending radius of the super-flexible 1/2'' jumper must be more than 50 mm (1.97 in.), and the bending radius of the ordinary 1/2'' jumper must be more than 127 mm (5 in.).

l The bending radius of the power cable or PGND cable must be at least three times the diameter of the cable.

l The bending radius of a fiber optic cable is at least 20 times the diameter of the fiber optic cable, and the minimum bending radius of the breakout cable at each end of the fiber optic cable is 30 mm (1.18 in.).

l The bending radius of the E1/T1 cable must be at least three times the diameter of the cable.

l The bending radius of the signal cable must be at least five times the diameter of the cable.

Requirements for Cable Binding l The same types of cable must be bound together.

l Different types of cable must be separately routed with the minimum spacing of 30 mm

(1.18 in.) and cannot be entangled.

l The cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.

l Cable ties are installed in the same direction, and those at the same horizontal line must be in a straight line.

l The excess of indoor cable ties is trimmed off, and the excess of outdoor cable ties allows about 5 mm (0.2 in.), without remaining rough edges.

l Labels or nameplates must be attached to both ends, joints, or turns of cables after they are installed.

Security Requirements l Cables should be placed away from sharp objects or wall burrs. If these positions are inevitable, protect the cables with protection pipes.

l Cables must be routed away from heat sources, or heat-insulation materials are added between cables and heat sources.

l Sufficient slack (recommended for about 0.1 m [0.33 ft]) is provided in cables at turns or the position close to a device, facilitating cable and device maintenance.

Indoor Cabling Requirements l Cables are routed indoors through the feeder window.



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RRU3952 (850M)

Installation Guide 9 Installing RRU Cables l Drip loops must be made outside the feeder window, and the requirements for the minimum bending radius are met.

l When cables are routed indoors, engineers are required indoors for cooperation.

l The feeder window must be waterproofed.

Outdoor Cabling Requirements l Cables routed outdoors must be led through a pipe when they may be damaged.

l AC power cables, transmission cables, and cables buried in the ground must be protected.

l If cables at the cabinet bottom need to be routed through a pipe along the ground, lead the pipe into the cabinet base for about 30 mm (1.18 in.) to 50 mm (1.97 in.), not into the cabinet. Block the pipe with waterproof tape or silicon gel, and secure the pipe to the cable hole at the cabinet bottom with metal piece.

l If cables at the cabinet bottom need to be routed through a pipe along the metal cable trough, do not lead the pipe into the cabinet base. The cable trough must be sealed and routed through the cable hole at the cabinet bottom.

l When routing RRU cables, ensure that the highest positions of the routes of all RRU cables

(except RF cables and AISG cables) must be lower than the bottom of the RRU.

l Cables are secured with cable clips.

l Cables are routed neatly along the specified cabling direction and secured with cable clips.

l The positions for cable clips are determined onsite. For example, the cable clips for the

7/8" feeder are installed at the spacing of 1.5 m (4.92 ft) to 2 m (6.56 ft) in the same direction, and the cable clips for the power cables are installed at the spacing of 1.5 m (4.92 ft) to 2 m (6.56 ft) in the same direction.

l Cable clips must be vertical with cables, and the cables in a cable clip must be parallel.

l After routing cables neatly and correctly, tighten the screws on cable clips.

Secure cables on the cable tray, as shown in Figure 9-1 .



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Installation Guide

Figure 9-1 Securing cables on the cable tray

9 Installing RRU Cables

Secure cables on the tower, as shown in

Figure 9-2

.



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Installation Guide

Figure 9-2 Securing cables on the tower


Special Cabling Requirements

Cabling Requirements for Power Cables l Power cables must be installed in the position specified in engineering design documents.

l If the length of power cables is insufficient, replace the cables rather than adding connectors or soldering joints to lengthen the cables.

l Cables must be routed by only qualified and trained personnel before all preparations are made.

l Cables are routed in an untangled and orderly fashion.

l If DC power cables need to be routed on the tower platform, lay out the cables on the guardrail with the shortest distance and route the cables along the guardrail.



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RRU3952 (850M)

Installation Guide 9 Installing RRU Cables l If DC power cables need to be routed close to a device on the tower, secure the cables to the guardrail or pole with cable clips. The device cannot be far away from the position for securing the cables.

Cabling Requirements for PGND Cables l PGND cables for the base station must be connected to the same ground bar.

l PGND cables must be buried in the ground or routed indoors. They should not be routed overhead before they are led into the equipment room.

l The exterior of the coaxial wire and the shield layer of the shielded cable must have proper electrical contact with the metal surface of the equipment to which they are connected.

l PGND cables and signal cables must be installed in an untangled and orderly fashion. A certain distance must be reserved between them to prevent interference from each other.

l Fuses or switches must not be installed on the PGND cables.

l Other devices must not be used for electrical connections of the PGND cables.

l All the metal parts in the housing of the equipment must be reliably connected to the ground terminal.

Cabling Requirements for E1 Cables l E1 cables must not cross power cables, PGND cables, or RF cables when routed. If transmission cables are routed with power cables, PGND cables, or RF cables in parallel, the spacing between them must be greater than 30 mm (1.18 in.).

l E1 cables are routed straightly and bound neatly with cable ties.

l Sufficient slack is provided in E1 cables at turns.

l E1 cables cannot be squeezed by the cabinet door when routed through the cabinet, as shown in

Figure 9-3

.

Figure 9-3 E1 cables routed through the cabinet

Cabling Requirements for Fiber Optic Cables l Fiber optic cables must be routed by at least three qualified and trained personnel before all preparations are made.

l Fiber optic cables are used within the temperature range of -40°C to 60°C. If the current temperature is out of the range, make protection measures or route the cables again.

l Cables are routed in an untangled and orderly fashion.



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RRU3952 (850M)

Installation Guide 9 Installing RRU Cables l Do not bind fiber optic cables at turns.

l Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the cables away from sharp objects.

l When fiber optic cables are routed, the excess of the cables must be coiled around special devices, such as a fiber coiler.

l An unarmored fiber optic cable must be bound using binding straps. If a fiber optic patch cord needs to be secured in a cabinet or a piece of equipment, use binding straps to bind it and then use cable ties to secure the binding straps to the cabinet or equipment. Ensure that the fiber optic cables can flexibly move in the cable ties. Do not bend the fiber optic cables sharply. The following figure shows how to bind the fiber optic cables correctly.

Figure 9-4 Binding fiber optic cables l When coiling fiber optic cables, apply even strength. Do not bend the cables with force.

l Vacant optical connectors must be covered with dustproof caps.

l Fiber optic cables cannot be squeezed by the cabinet door when routed through the cabinet, as shown in

Figure 9-5

, Figure 9-6 and Figure 9-7 .

Figure 9-5 CPRI fiber optic cables routed through the cabinet (1)



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RRU3952 (850M)

Installation Guide

Figure 9-6 CPRI fiber optic cables routed through the cabinet (2)


Figure 9-7 FE/GE cables routed through the cabinet l If fiber optic cables need to be routed on the tower platform, lay out the cables on the guardrail with the shortest distance and route the cables along the guardrail.

l If fiber optic cables need to be routed close to a device on the tower, secure the cables to the guardrail or pole with cable clips. The device cannot be far away from the position for securing the cables.

l If the fiber optic cables close to a device are too long, coil the excess of the cables and secure them on the tower.

9.2 RRU Cable Connections


NOTE

The RRU does not support power cable cascading.

Figure 9-8

shows the cable connections of a single-mode RRU.



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RRU3952 (850M)

Installation Guide

Figure 9-8 Cable connections of a single-mode RRU


(1) RRU PGND cable

(4) RRU AISG extension cable

(7) RRU alarm cable -

(2) RRU RF jumper

(5) RRU power cable

-

(3) RRU AISG multi-wire cable

(6) CPRI optical fiber

Figure 9-9

shows the cable connections of a multimode RRU.



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Installation Guide

Figure 9-9 Cable connections of a multimode RRU


(1) RRU PGND cable

(4) RRU AISG extension cable

(7) RRU alarm cable -

(2) RRU RF jumper

(5) RRU power cable

-


(6) CPRI optical fiber

Figure 9-10

shows the cable connections of multiple single-mode RRUs.



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Installation Guide

Figure 9-10 Cable connections of multiple single-mode RRUs


(1) RRU PGND cable

(4) CPRI optical fiber -

(2) RRU RF jumper

-


Figure 9-11

shows the cable connections of multiple multimode RRUs.



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Installation Guide

Figure 9-11 Cable connections of multiple multimode RRUs


Figure 9-12

shows inter-RRU cable connections.



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Installation Guide

Figure 9-12 Inter-RRU cable connections


(1) PGND cable

(4) CPRI fiber optic cable

(2) RRU RF jumper

(5) RRU power cable -

(3) Inter-RRU RF cable

NOTE l An RRU3952(850M) can be interconnected with an RRU3804 or RRU3801E in the same sector using

RX_IN/OUT ports.

l When an RRU3952(850M) is interconnected with an RRU3804 or RRU3801E, the ANT_TX/RXA port on the RRU3952(850M) and the ANT_TX/RXA port on the RRU3804 or RRU3801E must be connected to the same antenna.

l When an RRU3952(850M) is interconnected with an RRU3804 or RRU3801E, the ANT_RXC port on the RRU3952(850M) and the ANT_RXB port on the RRU3804 or RRU3801E do not need to be connected to an antenna.

9.3 Installing RRU Cables


Figure 9-13

shows the procedure for installing RRU cables.



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Installation Guide

Figure 9-13 Procedure for installing RRU cables


9.4 RRU Cables


Table 9-1

lists RRU cables.



103

RRU3952 (850M)


Table 9-1 RRU cables

Cable One End

Connector

RRU PGND Cable OT terminal

(M6, 16 mm 2 or

0.025 in.

2 )

RRU Power Cable Tool-less female connector

(pressfit type)

Installation

Position

Ground terminal on the RRU

NEG(-) and

RTN(+) ports on the RRU

RRU Alarm Cable DB15 male

CPRI Fiber Optic

Cable (RRU working in multimode scenarios)

CPRI Fiber Optic

Cable (RRU working in singlemode scenarios) connector

DLC connector CPRI0 port on the RRU

CPRI1 port on the RRU

DLC connector

EXT_ALM port on the

RRU

CPRI0 port on the RRU

RRU RF Jumper DIN male connector

RRU AISG Multi-

Wire Cable

DB9 waterproof male connector

RF ports on the RRU

RET port on the RRU

RRU AISG

Extension Cable

Standard AISG male connector

The Other End

Connector Installation

Position

OT terminal

(M8, 16 mm 2

0.025 in.

2 )

Depending on the power supply equipment

or

Ground terminal on the ground bar

External power equipment

Cord end terminal

External alarm device

DLC connector CPRI port on a board in the

BBU

DLC connector CPRI port on a board in the

BBU

DIN male connector

Standard AISG female connector

Standard AISG female connector

Antenna system

Standard AISG male connector on the RCU or on the AISG extension cable

Standard AISG male connector on the RCU

Inter-RRU RF

Cable

DB2W2 connector

Standard

AISG female connector on the AISG multi-wire cable

RX_IN/OUT port on the

RRU

DB2W2 connector

RX_IN/OUT port on the RRU



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RRU3952 (850M)


9.5 Installing an RRU PGND Cable

This section describes the procedure for installing an RRU PGND cable.

Context

The cross-sectional area of an RRU PGND cable is 16 mm 2 (0.025 in.

2 ). The cable has an M6

OT terminal at one end and an M8 terminal at the other end.

Procedure

Step 1 According to the actual cable route, cut the PGND cable into a proper length to prepare an RRU

PGND cable. Then, add an OT terminal at each end of the cable according to the instructions in

Assembling the OT Terminal and the Power Cable.

Step 2 Install the RRU PGND cable.

Connect the M6 OT terminal at one end of the PGND cable to the ground terminal at the RRU

bottom and the M8 OT terminal at the other end to the external ground bar, as shown in Figure

9-14

.

Figure 9-14 Installing an RRU PGND cable

NOTE

Crimp OT terminals in correct positions, as shown in

Figure 9-15

.



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RRU3952 (850M)

Installation Guide

Figure 9-15 Correct position of an OT terminal


Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label.

----End

9.6 Installing an RRU RF Jumper

This section describes the procedure for installing an RRU RF jumper.

Procedure

Step 1 Connect the DIN male connector at one end of the RRU RF jumper to the ANT port on the RRU,

and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure

9-16

.

Figure 9-16 Installing an RRU RF jumper



106

RRU3952 (850M)


NOTICE

On AC-powered electric railways, such as high-speed railways, when leaky cables are connected to RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRU

RF jumpers and the leaky cables to protect the RRUs against damage.

Step 2 Connect the other end of the RF jumper to the external antenna system.

Step 3

Waterproof the connectors of the RF jumper by referring to Figure 9-17 .

Figure 9-17 Waterproofing a connector of the RF jumper

(1) Waterproof tape (2) PVC insulation tape

NOTE l Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its original length.

l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.

l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps more than 50% of the preceding layer. Ensure that neighboring layers are stuck to each other.

l Ensure that the adhesive surface of the tape overlaps the lower layer.

l When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).

1.

Wrap three layers of waterproof tape on the connector, first from bottom up, then from top down, and finally from bottom up. Start wrapping the connector at a position 50 mm (1.97

in.) away below the bottom of the connector to the top of the connector, first from bottom up, then from top down, and finally from bottom up. Cut off the redundant tape after three layers are wrapped. Wrap each layer of tape around the connector tightly.



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RRU3952 (850M)


2.

Wrap three layers of PVC insulation tape. Start the wrapping at a position 30 mm (1.18 in.) away below the bottom of the waterproof tape to the top of the connector, first from bottom up, then from top down, and finally from bottom up. Cut off the redundant tape after three layers are wrapped. Wrap each layer of tape around the connector tightly.

3.

Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away from one end of the PVC insulation tape.

Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must be waterproofed, as shown in

Figure 9-18

.

NOTICE

Do not remove dustproof caps from vacant antenna connectors.

Figure 9-18 Waterproofing a dustproof cap

(1) Dustproof cap (2) Waterproof tape (3) PVC insulation tape

NOTE l Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its original length.

l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.

l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps more than 50% of the preceding layer. Ensure that neighboring layers are stuck to each other.

l Ensure that the adhesive surface of the tape overlaps the lower layer.

l When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).

1.

Verify that dustproof caps are not removed.

2.

Wrap three layers of waterproof tape on the connector, first from bottom up, then from top down, and finally from bottom up. Wrap each connector with three layers of waterproof tape, from bottom up, then from top down, and finally from bottom up. Do not cut the tape until all the three layers of the tape are already wrapped. Cut off the redundant tape after three layers are wrapped. Wrap each layer of tape around the connector tightly.

3.

Wrap three layers of PVC insulation tape. Wrap each connector with three layers of waterproof tape, from bottom up, then from top down, and finally from bottom up. Do not



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RRU3952 (850M)

Installation Guide 9 Installing RRU Cables cut the tape until all the three layers of the tape are already wrapped. Cut off the redundant tape after three layers are wrapped. Wrap each layer of tape around the connector tightly.

4.

Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away from one end of the PVC insulation tape.

Step 5

Route the cables according to the instructions in 9.1 Cabling Requirements

, and then use cable ties to bind the cables.

Step 6 Label the installed cables according to the instructions in Attaching a Sign Plate Label.

Step 7 Attach color-coding to the installed RF jumper according to the instructions in Attaching the

Color Ring.

----End

9.7 Installing an Inter-RRU RF Cable

This section describes the procedure for installing an inter-RRU RF cable.

Procedure

Step 1 Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RX_IN/OUT port and remove the dustproof cap.

Step 2 Connect the DB2W2 connector at one end of the RF cable to the RX_IN/OUT port of an RRU,

and connect the other end to the RX_IN/OUT port of the other RRU, as shown in Figure

9-19

.

Figure 9-19 Installing an inter-RRU RF cable



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RRU3952 (850M)


Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the DB2W2 connector to

0.4 N·m (3.54 lbf·in.).

Step 4



Step 5 Label the installed cables according to the instructions in Attaching an L-Shaped Label.

----End

9.8 Installing an RRU AISG Multi-Wire Cable and AISG

Extension Cable

This section describes the procedures for installing an RRU AISG multi-wire cable and AISG extension cable.

Context

When the distance between an RRU and a Remote Control Unit (RCU) is longer than 5 m (16.4

ft.), an AISG multi-wire cable is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable.

Procedure l Install an AISG multi-wire cable that is not configured with an AISG extension cable.

1.

Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RET port and remove the dustproof cap.

2.

Link the waterproofed DB9 connector at one end the AISG multi-wire cable to the

RET port on the RRU bottom, as shown in Figure 9-20 .

Figure 9-20 Installing an RRU AISG multi-wire cable



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RRU3952 (850M)


3.

Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof

DB9 connector to 0.4 N·m (3.54 lbf·in.).

4.

Connect the other end of the cable to the standard AISG male connector on the RCU.

5.



6.

Label the installed cables according to the instructions in Attaching an L-Shaped

Label.

l Install an AISG multi-wire cable that is configured with an AISG extension cable.

1.

Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RET port and remove the dustproof cap.

2.

Link the waterproofed DB9 connector at one end of the AISG multi-wire cable to the

RET port on the RRU bottom, and link the other end to the standard AISG male

connector of the AISG extension cable, as shown in Figure 9-21

.

Figure 9-21 Installing an RRU AISG multi-wire cable

3.

Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof

DB9 connector to 0.4 N·m (3.54 lbf·in.).

4.

Connect the other end of the AISG extension cable to the standard AISG male connector on the RCU, as shown in

Figure 9-22

.



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RRU3952 (850M)

Installation Guide

Figure 9-22 Installing an RRU AISG extension cable


5.



6.

Label the installed cables according to the instructions in Attaching an L-Shaped

Label.

----End

9.9 Installing an RRU Alarm Cable

This section describes the procedure for installing an RRU alarm cable.

Procedure

Step 1 Use an M3 Phillips screwdriver to loosen the screws on the dustproof cap on the EXT_ALM port and remove the dustproof cap.

Step 2 Connect the waterproof DB15 connector at one end of the RRU alarm cable to the

EXT_ALM

port on the RRU, as shown in Figure 9-23 .



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RRU3952 (850M)

Installation Guide

Figure 9-23 Installing an RRU alarm cable


NOTE

Install the waterproof DB15 male connector on the RRU alarm cable with caution, preventing the pin assignment from being damaged.

Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB15 male connector to 0.4 N·m (3.54 lbf·in.).

Step 4 Connect the eight cord end terminals at the other end to external alarm devices.

NOTE

Use insulating adhesive tapes to wrap cord end terminals that are not in use and fix them at a proper position based on the onsite situations. This prevents false alarm reporting and equipment damage due to contact of exposed cables.

Figure 9-24

shows the method for handling cord end terminals not in use.

Figure 9-24 Method for handling cord end terminals that are not in use



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RRU3952 (850M)


Step 5




----End

9.10 Opening the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for opening the cover plate of an RRU cabling cavity.

Procedure

Step 1 Wear ESD gloves.

NOTICE

Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components.

Step 2 Use an M5 Phillips screwdriver to loosen the three screws on the cover plate of the RRU cabling

cavity, and open the cover plate, as shown in Figure 9-25

.

Figure 9-25 Opening the cover plate of the RRU cabling cavity

(1) Cover plate (2) Cabling cavity (3) Clip

(4) Cable trough for the power cable (5) Waterproof block (6) Cable trough for the fiber optical cable



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RRU3952 (850M)


Step 3 Loosen the screws on the clip using an M4 Phillips screwdriver, and open the clip, as shown in

Figure 9-26

.

NOTE

Open the clip only for the associated cable.

Figure 9-26 Opening clips

Step 4 Remove the waterproof block.

NOTE

Remove only the waterproof blocks for the cables to be installed.

----End

9.11 Installing a CPRI Optical Cable

This section describes the procedure for installing a CPRI optical cable.

Prerequisites

Before the installation, single-mode optical modules can be distinguished from multimode optical modules in either of the following ways: l SM and MM labels on an optical module: SM indicates a single-mode optical module, and

MM indicates a multimode optical module.

l Color of the puller on an optical module: Blue indicates a single-mode optical module, and black or gray indicates a multimode optical module.



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RRU3952 (850M)


NOTICE

The optical modules to be installed must match CPRI rates.

Context l A CPRI optical cable transmits CPRI signals between a BBU and an RRU.

Procedure

Step 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on the

RRU and the other optical module into the CPRI port on the BBU, and raise the pullers, as shown in

Figure 9-27

.

Figure 9-27 Installing an optical module

NOTICE

The performance of an optical module that is exposed to the air for more than 20 minutes may be abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical module within 20 minutes.

Step 2 Connect the end labeled 1A and 1B of the optical cable to the optical module on the RRU side, as shown in

Figure 9-28

.



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Figure 9-28 Installing a CPRI optical cable


NOTICE

To avoid any damage to optical cables, the cables connected to the RRU must be installed

according to the installation process. For details about the installation process, see 9.3 Installing

RRU Cables

.

Step 3 Connect the end labeled 2A and 2B of the optical cable to the optical module on the BBU side.

Step 4




----End

9.12 Installing an RRU Power Cable

This section describes the procedure for installing an RRU power cable.

Prerequisites l A tool-less female connector (pressfit type) is added to the RRU power cable on the RRU

side. For details, see 12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the

RRU Power Cable on the RRU Side

.



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RRU3952 (850M)

Installation Guide 9 Installing RRU Cables l A connector or OT terminals are added to the RRU power cable on the power device side.

For details, see DBS3900 Installation Guide .

Context

If a power device provided by the customer is used, the recommended specification of the circuit breaker on this power device is 15 A to 30 A.

Table 9-2

describes the RRU power cable.

Table 9-2 RRU power cable

Cable

RRU power cable

On the RRU

Side

On the

Power

Device Side

Tool-less female connector

(pressfit type)

Tool-less female connector

(pressfit type)

EPC5 connector

Pow er

Devi ce

Color

EPU A cable with a black jacket and two wires inside

DCD

U-11

B l North American standards: The

RTN(+) wire is black and the

NEG(-) wire is blue.

DCD

U-12

B l European standards: The RTN

(+) wire is brown and the NEG

(-) wire is blue.

CAUTION

When installing the RRU power cable, connect the power cable to the RRU connector first and then to the power equipment connector. Incorrect connection sequence or reverse connection of positive and negative poles may damage the RRU or cause personal injury.

Procedure

Step 1 Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to the

power supply socket on the RRU, as shown in Figure 9-29 .



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Installation Guide

Figure 9-29 Installing an RRU power cable


NOTICE

Ensure that the exposed shield layer of the power cable is properly tightened using the clip.

Step 2 Connect the connector at the other end of the RRU power cable to the corresponding position on the power device.

NOTE l A DCDU-11B/DCDU-12B can supply power to a maximum of six RRUs. Ensure that the RRU power cable is connected to one of LOAD0 to LOAD5 ports on the DCDU-11B/DCDU-12B.

l One EPU can supply power to a maximum of six RRUs. Ensure that the RRU power cable is connected to one of RRU0 to RRU5 ports on the EPU.

l When the RRU power cable is connected to the EPU, the blue core wire in the tool-less female connector

(pressfit type) is connected to the upper port on the EPU, and the black/brown core wire is connected to the lower port on the EPU.

Step 3



Step 4 Label the installed cables according to the instructions in Attaching a Cable-Tying Label.

----End



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RRU3952 (850M)


9.13 Closing the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for closing the cover plate of an RRU cabling cavity.

Procedure

Step 1 Close the clips for the installed cables. Use an M4 torque screwdriver to tighten the screws on each clip to 1.4 N·m (12.39 lbf·in.), as shown in

Figure 9-30

.

NOTICE

Ensure that the exposed shield layer of the power cable is properly tightened using the clip.

Figure 9-30 Closing clips

Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in

Figure

9-31

.

NOTICE

Ensure that cables and waterproof blocks are properly inserted into troughs.



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Installation Guide

Figure 9-31 Correct placement of waterproof blocks


Step 3 Close the cover plate of the RRU cabling cavity. Use an M5 torque screwdriver to partially tighten the screws on the cover plate in the sequence shown in

Figure 9-32

. Then tighten the screws to 2 N·m (17.7 lbf·in.) in the same sequence.

Figure 9-32 Closing the cover plate of an RRU cabling cavity

Step 4 Take off the ESD gloves, and pack up all the tools.

----End



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Installation Guide 10 Checking the RRU Hardware Installation

10

Checking the RRU Hardware

Installation

After an RRU is installed, check the hardware installation.

Table 10-1 provides the checklist for the RRU hardware installation.

2

3

4

Table 10-1 Checklist for the RRU hardware installation

SN Item

1 The position for each device conforms to the engineering drawing and meets the space requirement. Sufficient space is reserved for equipment maintenance.

5

6

The RRU is securely installed.

The cover plate is securely installed on the RRU cabling cavity.

Waterproof blocks are securely installed in vacant cable troughs of the RRU cabling cavity, and the cover plate for the cabling cavity is securely installed. In addition, vacant RF ports are covered with dustproof caps and the caps are tightened.

There are no connectors or joints on each power cable or PGND cable.

7

8

9

The terminals at two ends of each power cable or PGND cable are securely soldered or crimped.

None of power cables and PGND cables can be short-circuited or reversely connected. In addition, these cables are not damaged or broken.

Power cables and PGND cables are separately bound from other cables.

10

11

The protection grounding of the RRU and the surge protection grounding of the building share one group of ground conductors.

The connectors of each signal cable are intact and securely linked, and these cables are not damaged or broken.

Labels are correct, legible, and complete at both ends of each cable, feeder, and jumper.



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Installation Guide 11 Powering On an RRU

11

Powering On an RRU

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

NOTICE

After you unpack an RRU, you must power on it within 24 hours. If you power off the RRU for maintenance, you must restore power to the RRU within 24 hours.

Figure 11-1

shows the RRU power-on check process.

NOTE

For details about how to power on an RRU, see Powering On an RRU. For details about how to power off an RRU, see section "Powering-Off the RRU" in RRU Maintenance Guide .



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Installation Guide

Figure 11-1 RRU power-on check process

11 Powering On an RRU

(a) The normal input voltage of an RRU is -48 V DC. The voltage of the external power supply should range from -36 V DC to -57 V DC.

(b) The RUN indicator on the RRU is on for 1s and off for 1s. The ALM indicator is steady off.



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Installation Guide 12 Appendix

12

Appendix


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

12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the

RRU Side

This section describes the procedure for adding a tool-less female connector (pressfit type) to the RRU power cable on the RRU side.



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Installation Guide 12 Appendix

12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side

This section describes the procedure for adding a tool-less female connector (pressfit type) to the RRU power cable on the RRU side.

Context

Figure 12-1

shows the cable diagram on labels.

Figure 12-1 Cable diagram on labels

(1) Cable diagram on labels

Procedure

Step 1 Determine the length of the power cable for different operations based on the labels, as shown in

Figure 12-2

.

Figure 12-2 Determining the length of the power cable

Step 2

Strip the specified length of the sheath off the power cable, as shown in Figure 12-3

.



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Installation Guide

Figure 12-3 Stripping the specified length of sheath

12 Appendix

Step 3 Strip a specified length of sheath off each core wire. The length must be consistent with the length of the notch in the tool-less female connector (pressfit type), as shown in

Figure 12-4

.

Figure 12-4 Stripping the sheath off each core wire

Figure 12-5 Matched length

Step 4 Add a tool-less female connector (pressfit type) to two core wires.

1.

Tighten the screws using a Phillips screwdriver, as shown in

Figure 12-6

.



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RRU3952 (850M)

Installation Guide

Figure 12-6 Tightening screws

12 Appendix

2.

Connect the blue core wire labeled NEG(-) to the port and the black/brown core wire labeled RTN(+) to the + port on the tool-less female connector (pressfit type), and then tighten the screws using a Phillips screwdriver, and then use a torque screwdriver to tighten

the M4 screws to 1.4 N·m (12.39 lbf·in.), as shown in Figure 12-7 .

DANGER

Do not reversely connect the positive and negative poles. Reverse connection of positive and negative poles may result in equipment malfunctions or personal injury. Therefore, check the power cable connection before powering on the RRU.

Figure 12-7 Adding a tool-less female connector (pressfit type) to two core wires

Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as shown in

Figure 12-8

.



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Installation Guide

Figure 12-8 Stripping the sheath off the power cable

12 Appendix

NOTICE

Each core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm

(0.059 [in.]), as shown in Figure 12-9 .

Figure 12-9 Inserting core wires into the tool-less female connector (pressfit type)

----End



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Huawei Technologies QISRRU3952-850M RemoteRadio Unit User Manual

Installation Guide

About This Document

Purpose

Intended Audience

Organization

Contents

Changes in RRU3952(850M) Installation

Guide

Installation Preparations

About This Chapter

2.1 Reference Documents

2.2 Tools and Instruments

2.3 Skills and Requirements for Onsite Personnel

Information About the Installation

About This Chapter

3.1 RRU Exterior

3.2 RRU Ports

3.3 RRU Indicators

3.4 Installation Scenarios

3.5 Installation Clearance Requirements of an RRU

Unpacking the Equipment

Installation Process

(Optional) Installing the Plastic Shells of the

RRU

Hoisting an RRU and Related Cables onto a

Tower

About This Chapter

7.1 Hoisting an RRU onto a Tower

7.2 Hoisting Fiber Optic Cables onto a Tower

7.3 Hoisting Power Cables onto a Tower

Installing the RRU

About This Chapter

8.1 Mounting Kits for an RRU

8.2 Installing the RRU on a Pole

8.3 Installing an RRU on U-steel

8.4 Installing an RRU on Angle Steel

8.5 Installing an RRU on a Wall

8.6 Installing an RRU on an IFS06

Installing RRU Cables

About This Chapter

9.1 Cabling Requirements

9.2 RRU Cable Connections

9.3 Installing RRU Cables

9.4 RRU Cables

9.5 Installing an RRU PGND Cable

9.6 Installing an RRU RF Jumper

9.7 Installing an Inter-RRU RF Cable

9.8 Installing an RRU AISG Multi-Wire Cable and AISG

Extension Cable

9.9 Installing an RRU Alarm Cable

9.10 Opening the Cover Plate of an RRU Cabling Cavity

9.11 Installing a CPRI Optical Cable

9.12 Installing an RRU Power Cable

9.13 Closing the Cover Plate of an RRU Cabling Cavity

Checking the RRU Hardware

Installation

Powering On an RRU

Appendix

About This Chapter

12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side

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