Huawei RRU3642 800M Users Guide

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RRU3642

V400

Installation Guide

Issue 01

Date 2011-12-27

HUAWEI TECHNOLOGIES CO., LTD.

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

Trademarks and Permissions

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

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

Notice

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

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

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: http://www.huawei.com

Email: support@huawei.com

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RRU3642 Installation Guide About This Document

About This Document

Overview

This document describes the procedure for installing a direct current (DC) RRU3642 (referred to as RRU in this document). RRU is short for remote radio unit.

Product Version

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

Product Name

DBS3900 V400

Intended Audience

This document is intended for:

l Base station installation engineers

Organization

1 Changes in the RRU3642 Installation Guide

This chapter describes changes in the RRU3642 Installation Guide.

Product Version

2 Installation Preparations

Before the installation, you must obtain all reference documents and required tools and instruments, and have been trained on installation skills.

3 Information About the Installation

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

4 Unpacking the Equipment

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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 the RRU.

6 Installing the RRU

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

7 Installing RRU Cables

This section describes the procedures for installing remote radio unit (RRU) cables.

8 Checking the RRU Hardware Installation

After an RRU is installed, check the hardware installation.

9 Powering On an RRU

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

Conventions

10 Appendix

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

Symbol Conventions

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

Symbol

Description

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

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

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

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

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

General Conventions

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

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RRU3642 Installation Guide About This Document

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New

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

Command Conventions

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

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

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

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

vertical bars. One item is selected.

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

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

{ x | y | ... }

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

[ x | y | ... ]

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

GUI Conventions

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

Convention

Description

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

are in boldface. For example, click OK.

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

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

Keyboard Operations

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

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RRU3642 Installation Guide About This Document

Format Description

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

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

+A means the three keys should be pressed concurrently.

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

the two keys should be pressed in turn.

Mouse Operations

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

Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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RRU3642 Installation Guide Contents

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

1 Changes in the RRU3642 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...................................................................................................4

3 Information About the Installation...........................................................................................5

3.1 RRU Exterior......................................................................................................................................................6

3.2 RRU Ports...........................................................................................................................................................6

3.3 RRU Indicators...................................................................................................................................................9

3.4 Installation Options...........................................................................................................................................10

3.5 Installation Clearance Requirements of an RRU..............................................................................................15

3.5.1 Installation Clearance for a Single RRU.................................................................................................15

3.5.2 Installation Clearance for Multiple RRUs...............................................................................................17

3.5.3 Installation Spacing Between RRUs........................................................................................................20

4 Unpacking the Equipment.........................................................................................................24

5 Installation Process.....................................................................................................................26

6 Installing the RRU.......................................................................................................................27

6.1 Mounting Kits for an RRU...............................................................................................................................29

6.2 Installing the RRU on a Pole............................................................................................................................29

6.2.1 Installing a Single RRU...........................................................................................................................32

6.2.2 Installing Two RRUs...............................................................................................................................34

6.2.3 Installing Multiple RRUs.........................................................................................................................37

6.3 Installing the RRU on U-steel..........................................................................................................................40

6.4 Installing the RRU on Angle Steel...................................................................................................................44

6.5 Installing the RRU on a Wall...........................................................................................................................47

6.6 Hoisting an RRU onto a Tower........................................................................................................................51

7 Installing RRU Cables................................................................................................................55

7.1 Cabling Requirements......................................................................................................................................57

7.2 Cable Connections............................................................................................................................................62

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RRU3642 Installation Guide Contents

7.3 Installation Process...........................................................................................................................................65

7.4 RRU Cable List................................................................................................................................................65

7.5 Installing the RRU PGND Cable......................................................................................................................68

7.6 Installing an RRU RF Jumper..........................................................................................................................69

7.7 Installing an Inter-RRU RF Cable....................................................................................................................72

7.8 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable.........................................................73

7.9 Opening the Cover Plate of an RRU Cabling Cavity.......................................................................................75

7.10 Installing an RRU power cable.......................................................................................................................77

7.11 Installing a CPRI Fiber Optic Cable...............................................................................................................79

7.12 Installing an RRU Alarm Cable......................................................................................................................81

7.13 Closing the Cover Plate of an RRU Cabling Cavity......................................................................................82

8 Checking the RRU Hardware Installation..............................................................................84

9 Powering On an RRU.................................................................................................................85

10 Appendix.....................................................................................................................................86

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

................................................................................................................................................................................87

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RRU3642 Installation Guide 1 Changes in the RRU3642 Installation Guide

1 Changes in the RRU3642 Installation Guide

This chapter describes changes in the RRU3642 Installation Guide.

Draft A (2011-12-30)

This is the draft.

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RRU3642 Installation Guide 2 Installation Preparations

2 Installation Preparations

About This Chapter

Before the installation, you must obtain all reference documents and required tools and instruments, and have been trained on installation skills.

2.1 Reference Documents

Before the installation, you must familiarize yourself with the information in the following documents:

2.2 Tools and Instruments

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

2.3 Skills and Requirements for Onsite Personnel

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

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RRU3642 Installation Guide 2 Installation Preparations

2.1 Reference Documents

Before the installation, you must familiarize yourself with the information in the following documents:

l RRU3642 Hardware Description

l RRU Hardware Maintenance Guide

l DBS3900 Installation Guide

l OCB User Guide

2.2 Tools and Instruments

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

Hammer drill (a φ 14 bit)

Heat gun Phillips screwdriver (M3 to

Rubber mallet COAX crimping tool Wire stripper

Utility knife Cable cutter Adjustable wrench (capacity

ESD gloves Vacuum cleaner

Flat-head screwdriver (M3 to

M6)

≥ 32 mm [1.26 in.])

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RRU3642 Installation Guide 2 Installation Preparations

Level Torque screwdriver

5 mm

(M3 to M6)

Multimeter

Marker (diameter ≤ 10 mm [0.39 in.])

Torque wrench

Capacity: 17 mm [0.67 in.], 21 mm [0.82 in.], and 32 mm [1.26 in.]

Combination wrench

Capacity: 17 mm [0.67 in.], 21 mm [0.82 in.], and 32 mm [1.26 in.]

Measuring tape

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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RRU3642 Installation Guide 3 Information About the Installation

3 Information About the Installation

About This Chapter

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

3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

3.2 RRU Ports

This section describes the ports on the remote radio unit (RRU) panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel.

3.3 RRU Indicators

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

3.4 Installation Options

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

3.5 Installation Clearance Requirements of an RRU

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

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RRU3642 Installation Guide 3 Information About the Installation

3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

Figure 3-1 shows an RRU.

Figure 3-1 RRU exterior

Figure 3-2 shows RRU dimensions.

Figure 3-2 RRU dimensions

3.2 RRU Ports

This section describes the ports on the remote radio unit (RRU) panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel.

Figure 3-3 shows RRU ports on the panels.

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Figure 3-3 RRU ports on the panels

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

Table 3-1 RRU ports and indicators on the panels

Item

Label Description

(1) Ports at the bottom ANT_TX/RXA TX/RX port A, transmitting remote electrical

tilt (RET) signals

ANT_RXC RX port C

ANT_RXD Port RX port D

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Item Label Description

ANT_TX/RXB TX/RX port B

RX_IN/OUT Port for connecting to the inter-RRU radio

frequency (RF) cable

RET RET antenna port, transmitting RET signals

(2) Ports in the cabling

RTN (+) Power supply port

cavity

NEG (-)

CPRI0 Optical/electrical port 0

CPRI1 Optical/electrical port 1

EXT_ALM Port for alarm reporting

(3) Indicators RUN See RRU Indicators.

ALM

ACT

VSWR

CPRI0/IR0

CPRI1/IR1

NOTE

The port for transmitting RET signals is configured using software.

Table 3-2 lists the combination of RF ports.

Table 3-2 Combination of RF ports

TX/RX Channel

Number of RF Ports Combination of RF ports

One 1T2R channel 2 Combination of ANT_TX/

2 Combination of ANT_TX/

Two 1T2R channels 4 Combination of ANT_TX/

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RXA and ANT_TX/RXA ports

RXB and ANT_RXD ports

RXA and ANT_RXB ports

RXA and ANT_RXC ports and combination of ANT_TX/RXB and ANT_RXD ports

RRU3642 Installation Guide 3 Information About the Installation

TX/RX Channel Number of RF Ports Combination of RF ports

2T2R channel 2 Combination of ANT_TX/

RXA and ANT_TX/RXB ports

3.3 RRU Indicators

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

For detailed positions of RRU indicators, see RRU Ports.

Table 3-3 describes RRU indicators.

Table 3-3 RRU indicators

Label Color Status Description

RUN Green On There is power supply, but the module is

faulty.

Off There is no power supply, or the module is

faulty.

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

Blinking (on for

0.125s and off for

0.125s)

ALM Red On Alarms are generated, and the module must

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

Off No alarm is generated.

ACT Green On The module is working properly with TX

The module is working properly.

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

be replaced.

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

channels enabled.

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

VSWR Red Off No VSWR alarm is generated.

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

On VSWR alarms are generated on the

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The module is working properly with TX channels disabled.

VSWR alarms are generated on the ANT_TX/RXB port.

ANT_TX/RXA port.

RRU3642 Installation Guide 3 Information About the Installation

Label Color Status Description

CPRI0/IR0 Red and

green

CPRI1/IR1 Red and

green

Blinking (on for

0.125s and off for

0.125s)

Steady green The CPRI link is available.

Steady red An optical module fails to transmit or receive

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

Off The SFP module is not properly installed, or

Steady green The CPRI link is available.

Steady red An optical module fails to transmit or receive

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

VSWR alarms are generated on the ANT_TX/RXA and ANT_TX/RXB ports.

signals because the optical module is faulty or the fiber optic cable is broken.

The CPRI link is out of lock because of mutual lock of dual-mode clock sources or mismatched data rates over CPRI ports (you are advised to check the system configuration to identify the fault).

the optical module is powered off.

signals because the optical module is faulty or the fiber optic cable is broken.

The CPRI link is out of lock because of mutual lock of dual-mode clock sources or mismatched data rates over CPRI ports (you are advised to check the system configuration to identify the fault).

3.4 Installation Options

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

Installing an RRU on a Pole

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

Off The SFP module is not properly installed, or

the optical module is powered off.

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-4 Diameter of a pole

CAUTION

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 If the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of

two RRUs can be installed on the pole and the side-mounted installation is not recommended.

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

Figure 3-5 RRU installed on a pole

Installing an RRU on U-steel

Figure 3-6 shows U-steel specifications.

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-6 U-steel specifications

CAUTION

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

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

Figure 3-7.

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

(1) RRU

(2) U-steel or angle steel

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

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-8 RRU installed on U-steel

Installing an RRU on Angle Steel

Figure 3-9 shows angle steel specifications.

Figure 3-9 Angle steel specifications

CAUTION

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

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

in Figure 3-7.

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

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-10 RRU installed on angle steel

Installing an RRU on a Wall

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

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

weight of the RRU.

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

properly and the wall remains intact without cracks in it.

CAUTION

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

3-11.

Figure 3-11 Correct placement of brackets

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

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-12 RRU installed on a wall

3.5 Installation Clearance Requirements of an RRU

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

NOTE

The recommended installation clearance ensures normal running and provides an appropriate space for Operation and Maintenance (O&M). If there is sufficient space, leave the recommended installation clearance.

The minimum installation clearance ensures normal running and heat dissipation, but OM activities such as checking indicator status and opening the maintenance cavity cannot be properly conducted. If the installation space is restricted, leave the minimum installation clearance.

3.5.1 Installation Clearance for a Single RRU

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

Recommended Installation Clearance for a Single RRU

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

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-13 Recommended installation clearance for a single RRU

Minimum Installation Clearance for a Single RRU

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

Figure 3-14 Minimum installation clearance for a single RRU

Minimum Installation Clearance for a Single RRU Installed on a Tower

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

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RRU3642 Installation Guide 3 Information About the Installation

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

3.5.2 Installation Clearance for Multiple RRUs

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

Recommended Installation Clearance for Multiple RRUs Installed in Centralized Mode

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

centralized mode.

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RRU3642 Installation Guide 3 Information About the Installation

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

Minimum Installation Clearance for Multiple RRUs Installed in Centralized Mode

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

mode.

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

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RRU3642 Installation Guide 3 Information About the Installation

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

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

mode.

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

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

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

mode.

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RRU3642 Installation Guide 3 Information About the Installation

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

Recommended Clearance for Multiple RRUs Side-Mounted on a Wall

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

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

3.5.3 Installation Spacing Between RRUs

This section describes the horizontal and vertical installation spacing between RRUs.

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RRU3642 Installation Guide 3 Information About the Installation

Recommended Horizontal Spacing Between RRUs

Figure 3-21 shows the recommended horizontal spacing between RRUs.

Figure 3-21 Recommended horizontal spacing between RRUs

Minimum Horizontal Spacing Between RRUs

Figure 3-22 shows the minimum horizontal spacing between RRUs.

Figure 3-22 Minimum horizontal spacing between RRUs

Recommended Vertical Spacing Between RRUs

Figure 3-23 shows the recommended vertical spacing between RRUs.

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Figure 3-23 Recommended vertical spacing between RRUs

Minimum Vertical Spacing Between RRUs

Figure 3-24 shows the minimum vertical spacing between RRUs.

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RRU3642 Installation Guide 3 Information About the Installation

Figure 3-24 Minimum vertical spacing between RRUs

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RRU3642 Installation Guide 4 Unpacking the Equipment

4 Unpacking the Equipment

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

Context

NOTE

Procedure

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

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, sweat-

soaked gloves, or dirty gloves.

CAUTION

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.

If ...

The total number tallies with the packing list

Then ...

Go to Step 2.

The total number does not tally with the packing list

Step 2 Check the exterior of the packing case.

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

RRU3642 Installation Guide 4 Unpacking the Equipment

If ... Then ...

The outer packing is intact Go to Step 3.

The outer packing is severely damaged or soaked

Find out the cause and report it to the local Huawei office.

The vibrating indicator is red Stop unpacking the wooden crate, and then

report it to the transportation company.

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

Sign the Packing List with the customer.

those on the packing list

There is any shipment shortage or wrong shipment

Fill in and submit the Cargo Shortage and Mishandling Report.

Articles are damaged. Fill in and submit the Article Replacement

Report.

WARNING

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.

----End

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RRU3642 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 the RRU.

Figure 5-1 shows the process of installing an RRU.

Figure 5-1 Process of installing an RRU

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RRU3642 Installation Guide 6 Installing the RRU

6 Installing the RRU

About This Chapter

CAUTION

l Do not stand the RRU upright because the load-bearing capacity of the RF ports at the RRU

bottom is low.

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

during the installation.

6.1 Mounting Kits for an RRU

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

6.2 Installing the RRU on a Pole

One or more RRUs can be installed on a pole.

6.3 Installing the RRU on U-steel

This section describes the procedure for installing the RRU on U-steel and the precautions that must be taken during the installation. The RRU installed on U-steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on U-steel.

6.4 Installing the RRU on Angle Steel

This section describes the procedure for installing the RRU on angle steel and the precautions that must be taken during the installation. The RRU installed on angle steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on angle steel.

6.5 Installing the RRU on a Wall

This section describes the procedure for installing the RRU on a wall and the precautions that must be taken during the installation.

6.6 Hoisting an RRU onto a Tower

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RRU3642 Installation Guide 6 Installing the RRU

Before installing an RRU on a tower, bind the RRU and mounting kits and then hoist them onto the tower. The RRU can be installed on a pole, U-steel, or angle steel. This section describes the procedure for hoisting the RRU and mounting kits onto the tower and the precautions that must be taken.

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RRU3642 Installation Guide 6 Installing the RRU

6.1 Mounting Kits for an RRU

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

Figure 6-1 shows the front and rear view of an RRU.

Figure 6-1 Front and rear view of an RRU

(1) Cover plate (2) Attachment plate

Figure 6-2 shows the bracket assembly for an RRU.

Figure 6-2 Bracket assembly for an RRU

(1) Auxiliary mounting bracket

(2) Dual-nut bolt assembly (3) Main mounting bracket (4) Hoist clamp on the

main mounting bracket

6.2 Installing the RRU on a Pole

One or more RRUs can be installed on a pole.

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Figure 6-3 shows a single RRU installed on a pole.

Figure 6-3 A single RRU installed on a pole

Figure 6-4 shows two RRUs installed on a pole.

Figure 6-4 Two RRUs installed on a pole

Figure 6-5, Figure 6-6, and Figure 6-7 show more than two RRUs installed on a pole.

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Figure 6-5 Three RRUs installed on a pole in centralized mode

Figure 6-6 Four RRUs installed on a pole in centralized mode

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Figure 6-7 Six RRUs installed on a pole in centralized mode

6.2.1 Installing a Single RRU

This section describes the procedure for installing a single RRU on a pole and the precautions that must be taken during the installation.

Prerequisite

Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.6 Hoisting an RRU onto a Tower.

The hoist clamp on the main mounting bracket is secured properly.

Procedure

Step 1 Determine a position for installing the main mounting bracket.

l If the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a Single

RRU to determine a position.

l If the RRU must be installed on the ground, see Figure 6-8 to determine a position.

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Figure 6-8 Distance between the main mounting bracket and the ground

Step 2 Fit one end of the auxiliary mounting bracket to one dual-nut bolt assembly of the main mounting

bracket.

Step 3 Install the bracket assembly on the pole, and then fit the other end of the auxiliary mounting

bracket to the other dual-nut bolt assembly, as shown in Figure 6-9.

Figure 6-9 Installing the bracket assembly

NOTE

Verify that the arrow on the main mounting bracket is pointing up.

Step 4 Using a torque wrench, tighten the nuts to 40 N·m (354.03 lbf·in.) to secure the bracket assembly

onto the pole, as shown in Figure 6-10.

CAUTION

Tighten the two dual-nut bolt assemblies alternatively. 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.

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Figure 6-10 Securing the bracket assembly onto the pole

Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure

6-11.

Figure 6-11 Installing the RRU on the main mounting bracket

----End

6.2.2 Installing Two RRUs

This section describes the procedure for installing two RRUs on a pole and the precautions that must be taken during the installation.

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Procedure

Step 1 Install the first RRU, as shown in Figure 6-12. For details, see 6.2.1 Installing a Single RRU.

Figure 6-12 Installing the first RRU

Step 2 Install the other main mounting bracket on the auxiliary mounting bracket to secure the second

RRU, as shown in Figure 6-13.

Figure 6-13 Installing the second main mounting bracket

Step 3 Interchange the cover plate and plastic screws in the front and the attachment plate and stainless

steel screws at the rear of the second RRU, as shown in Figure 6-14.

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Figure 6-14 Interchanging the cover plate in the front and the attachment plate at the rear of the second RRU

1. Remove the attachment plate from the RRU rear using an inner hexagon screwdriver.

2. Remove the cover plate from the RRU front, and use a Phillips screwdriver to remove the plastic screws from the RRU.

3. Install the plastic screws onto the RRU rear, and tighten the screws to 0.25 N·m (2.21 lbf·in.) using a torque screwdriver.

4. Install the cover plate onto the RRU rear.

5. Install the attachment plate onto the RRU front, and tighten the stainless steel screws on the attachment plate to 5 N·m (44.25 lbf·in.) using a torque screwdriver.

Step 4 Install the second RRU on the main mounting bracket, as shown in Figure 6-15.

Figure 6-15 Installing the second RRU on the main mounting bracket

----End

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6.2.3 Installing Multiple RRUs

The section describes the procedure for installing multiple RRUs on a pole and the precautions that must be taken during the installation.

Context

A pole supports the installation of three, four, or six RRUs. The procedures for installing them are the same. Following is the procedure of installing four RRUs on a pole.

Procedure

Step 1 Install one set of bracket assembly on a pole. For details, see 6.2.1 Installing a Single RRU.

Step 2 Interchange the attachment plate and stainless steel screws at the RRU rear and the cover plate

and plastic screws on the RRU side, as shown in Figure 6-16.

Figure 6-16 Interchanging the attachment plate at the RRU rear and the cover plate on the RRU side

1. Remove the attachment plate from the RRU rear using an inner hexagon screwdriver.

2. Remove the cover plate from the RRU side, and use a Phillips screwdriver to remove the plastic screws from the RRU.

3. Install the plastic screws onto the RRU rear, and tighten the screws to 0.25 N·m (2.21 lbf·in.) using a torque screwdriver.

4. Install the cover plate onto the RRU rear.

5. Install the attachment plate onto the RRU side, and tighten the stainless steel screws on the attachment plate to 5 N·m (44.25 lbf·in.) using a torque screwdriver.

Step 3 Install the first RRU on the main mounting bracket, as shown in Figure 6-17.

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Figure 6-17 Installing the first RRU on the main mounting bracket

Step 4 Install the second main mounting bracket on the side of the first main mounting bracket, as

shown in Figure 6-18.

Figure 6-18 Installing the second main mounting bracket

Step 5 Install the second RRU on the second main mounting bracket, as shown in Figure 6-19.

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Figure 6-19 Installing the second RRU on the second main mounting bracket

Step 6 Install the third main mounting bracket, and then install the third RRU on the main mounting

bracket, as shown in Figure 6-20.

Figure 6-20 Installing the third RRU on the third main mounting bracket

Step 7 Install the fourth main mounting bracket, as shown in Figure 6-21.

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Figure 6-21 Installing the fourth main mounting bracket

Step 8 Install the fourth RRU on the fourth main mounting bracket, as shown in Figure 6-22.

Figure 6-22 Installing the fourth RRU on the fourth main mounting bracket

----End

6.3 Installing the RRU on U-steel

Prerequisite

Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.6 Hoisting an RRU onto a Tower.

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The hoist clamp on the main mounting bracket is secured properly.

Context

Figure 6-23 shows the top view of the RRU installed on U-steel.

Figure 6-23 Top view of the RRU

Procedure

Step 1 Determine a position for installing the main mounting bracket.

(1) U-steel

l If the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a Single

RRU to determine a position.

l If the RRU must be installed on the ground, see Figure 6-24 to determine a position.

Figure 6-24 Distance between the main mounting bracket and the ground

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NOTE

It is recommended that the main mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above the ground.

Step 2 Fit one end of the auxiliary mounting bracket to one dual-nut bolt assembly of the main mounting

bracket.

Step 3 Install the bracket assembly on U-steel, and then fit the other end of the auxiliary mounting

bracket to the other dual-nut bolt assembly, as shown in Figure 6-25.

Figure 6-25 Installing the bracket assembly

NOTE

Verify that the arrow on the main mounting bracket is pointing up.

Step 4 Using a torque wrench, tighten the nuts to 40 N·m (354.03 lbf·in.) to secure the bracket assembly

onto the U-steel, as shown in Figure 6-26.

CAUTION

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Figure 6-26 Securing the bracket assembly onto U-steel

Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure

6-27.

Figure 6-27 Installing the RRU on the main mounting bracket

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Figure 6-28 Installing the RRU on the main mounting bracket

----End

6.4 Installing the RRU on Angle Steel

Prerequisite

Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.6 Hoisting an RRU onto a Tower.

The hoist clamp on the main mounting bracket is secured properly.

Context

Figure 6-29 shows the top view of the RRU installed on angle steel.

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Figure 6-29 Top view of the RRU

(1) Angle steel

Procedure

Step 1 Determine a position for installing the main mounting bracket.

l If the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a Single

RRU to determine a position.

l If the RRU must be installed on the ground, see Figure 6-30 to determine a position.

Figure 6-30 Distance between the main mounting bracket and the ground

NOTE

It is recommended that the main mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above the ground.

Step 2 Fit one end of the auxiliary mounting bracket to one dual-nut bolt assembly of the main mounting

bracket.

Step 3 Install the bracket assembly on angle steel, and then fit the other end of the auxiliary mounting

bracket to the other dual-nut bolt assembly, as shown in Figure 6-31.

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Figure 6-31 Installing the bracket assembly

NOTE

Verify that the arrow on the main mounting bracket is pointing up.

Step 4 Using a torque wrench, tighten the nuts to 40 N·m (354.03 lbf·in.) to secure both the bracket

assembly onto the angle steel, as shown in Figure 6-32.

CAUTION

Figure 6-32 Securing the bracket assembly onto angle steel

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Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure

6-33.

Figure 6-33 Installing the RRU on the main mounting bracket

----End

6.5 Installing the RRU on a Wall

This section describes the procedure for installing the RRU on a wall and the precautions that must be taken during the installation.

Prerequisite

The hoist clamp on the main mounting bracket is secured properly.

Context

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

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

weight of the RRU.

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

properly and the wall remains intact without cracks in it.

Procedure

Step 1 Place the auxiliary mounting bracket against the installation position, use a level to verify that

the auxiliary mounting bracket is placed horizontally, and then mark anchor points with a marker, as shown in Figure 6-34.

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Figure 6-34 Marking anchor points

(1) Auxiliary mounting bracket (2) RRU

NOTE

It is recommended that the auxiliary mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above the ground.

Figure 6-35 Expansion bolt assembly

(1) M10x65 bolt

(2) Spring washer 10 (3) Plastic tube (4) Flat washer 10 (5) Expansion tube

Step 2 Drill holes at the anchor points, and then insert expansion bolt assemblies, as shown in Figure

6-36.

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Figure 6-36 Drilling a hole and inserting an expansion bolt assembly

1. Use a hammer drill with a φ14 bit to drill holes vertically at the marked anchor points. Ensure that the depth of each hole ranges from 55 mm (2.17 in.) to 60 mm (2.36 in.).

WARNING

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

2. Hit the expansion bolt with a rubber mallet until the expansion tube completely enters the hole.

3. Tighten an expansion bolt slightly and place it vertically into each hole.

4. Remove the M10x65 bolt, spring washer, plastic tube, and flat washer from each expansion bolt assembly in sequence.

NOTE

After completely removing an expansion bolt, store the plastic tube properly.

5. Hammer the bolt into the wall.

CAUTION

Do not hammer the expansion bolt entirely into the wall. Instead, leave 20 mm (0.79 in.) to 30 mm (1.18 in.) of the expansion bolt outside the wall.

Step 3 Fit the auxiliary mounting bracket on the expansion bolt, and then use a torque wrench (17 mm

[0.67 in.]) to tighten the expansion bolt to 30 N·m (265.52 lbf·in.), as shown in Figure 6-37.

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Figure 6-37 Fitting the auxiliary mounting bracket on expansion bolts

CAUTION

Verify that the arrow on the auxiliary mounting bracket is pointing up.

Step 4 Loosen the screws on the main mounting bracket and store them properly.

Step 5 Install the main mounting bracket, as shown in Figure 6-38.

Figure 6-38 Installing the main mounting bracket

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Step 6 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure

6-39.

Figure 6-39 Installing the RRU

----End

6.6 Hoisting an RRU onto a Tower

Prerequisite

Place a foam pad or cardboard on the ground to protect the housing of the RRU from damage before the binding. Do not stand the RRU upright because the load-bearing capacity of the RF ports at the RRU bottom is low.

CAUTION

When installed on a tower, only one RRU can be installed in standard mode or reverse mode, and two RRUs can be installed on a pole in back-to-back mode. RRUs cannot be installed on the side, and the brackets for more than two RRUs cannot be combined.

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Procedure

Step 1 Bind the RRU and mounting kits properly using a lifting sling, as shown in Figure 6-40.

Figure 6-40 Binding mounting kits for the RRU

Step 2 Lead one sling through the lifting eye and RRU handle and use the sling as a lifting sling, and

lead the other sling through the RRU handle and use the sling as a traction sling, as shown in

Figure 6-41.

Figure 6-41 Binding the RRU

(1) Lifting sling

(2) Lifting eye (3) Traction sling (4) Handle

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CAUTION

l Each sling has a maximum load-bearing capacity of 200 kg (441 lb), the diameter of the sling

must be less than 25 mm (0.98 in.), and the angle at the top of the traction sling [by the knot] must not be greater than 60 degrees.

l When hoisting the RRU and mounting kits onto the tower, protect them from colliding with

the ground and tower.

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

l Do not hoist the RRU by the handle or lifting eye only, as shown in Figure 6-42 and Figure

6-43.

Figure 6-42 Incorrect binding method

Figure 6-43 Incorrect binding method

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Step 3 Hoist the RRU and mounting kits onto the tower respectively, as shown in Figure 6-44.

NOTE

Hoist mounting kits onto the tower and then install the mounting kits before hoisting the RRU onto the tower. When hoisting the mounting kits and RRU, protect them from colliding with the tower.

Figure 6-44 Hoisting the RRU onto the tower

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

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 C binds the RRU using the lifting sling and secures the traction sling to the RRU handle.

3. Installation engineer B pulls the lifting sling downwards, and installation engineer C pulls the traction sling outwards to protect the RRU and mounting kits from colliding with the tower.

4. Installation engineer A catches the RRU, install the RRU on the main mounting bracket until the RRU snaps shut, and then unties the sling.

NOTE

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

----End

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RRU3642 Installation Guide 7 Installing RRU Cables

7 Installing RRU Cables

About This Chapter

This section describes the procedures for installing remote radio unit (RRU) cables.

7.1 Cabling Requirements

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

7.2 Cable Connections

This section describes the remote radio unit (RRU) cable connections.

7.3 Installation Process

This section describes the process of installing RRU cables.

7.4 RRU Cable List

This section provides a remote radio unit (RRU) cable list.

7.5 Installing the RRU PGND Cable

This section describes the procedure for installing a remote radio unit (RRU) protection ground (PGND) cable.

7.6 Installing an RRU RF Jumper

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

7.7 Installing an Inter-RRU RF Cable

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

7.8 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.

7.9 Opening the Cover Plate of an RRU Cabling Cavity

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

7.10 Installing an RRU power cable

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

7.11 Installing a CPRI Fiber Optic Cable

This section describes the procedure for installing a CPRI fiber optic cable.

7.12 Installing an RRU Alarm Cable

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

7.13 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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7.1 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.

l Drip loops must be made outside the feeder window, and the requirements for the minimum

bending radius are met.

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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 3 m (9.84 ft.) to 5 m (16.4 ft.), 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 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 m (3.28 ft.) to 1.5 m (4.92 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 7-1.

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Figure 7-1 Securing cables on the cable tray

Secure cables on the tower, as shown in Figure 7-2.

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Figure 7-2 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.

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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.

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.

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.

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 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.

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.

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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.

7.2 Cable Connections

This section describes the remote radio unit (RRU) cable connections.

NOTE

RRU power cables cannot be cascaded.

Figure 7-3 shows the cable connections of a single RRU in a base station in CDMA only (CO)

mode. CDMA is short for Code Division Multiple Access.

Figure 7-3 Cable connections of a single RRU in a base station in CO mode

1. Protection ground (PGND) cable

4. AISG extension cable for the RRU 5. RRU power cable 6. Common public radio interface

7. RRU alarm cable - -

2. Radio frequency (RF) jumper 3. Antenna Interface Standards Group

Figure 7-4 shows the cable connections of a single RRU in a base station in CDMA+UMTS

(CU) or CDMA+LTE (CL) mode. UMTS is short for Universal Mobile Telecommunications System. LTE is short for Long Term Evolution.

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(AISG) multi-wire cable for the RRU

(CPRI) optical fiber

RRU3642 Installation Guide 7 Installing RRU Cables

Figure 7-4 Cable connections of a single RRU in a base station in CU or CL mode

1. PGND cable 2. RF jumper 3. AISG multi-wire cable for the RRU

4. AISG extension cable for the RRU 5. RRU power cable 6. CPRI optical fiber

7. RRU alarm cable - -

Figure 7-5 shows the cable connections of multiple RRUs in a base station in CO mode.

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Figure 7-5 Cable connections of multiple RRUs in a base station in CO mode

1. PGND cable 2. RF jumper 3. RRU power cable

4. CPRI optical fiber - -

Figure 7-6 shows the cable connections of multiple RRUs in a base station in CU or CL mode.

Figure 7-6 Cable connections of multiple RRUs in a base station in CU or CL mode

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7.3 Installation Process

This section describes the process of installing RRU cables.

Figure 7-7 shows the process of installing RRU cables.

Figure 7-7 Process of installing RRU cables

7.4 RRU Cable List

This section provides a remote radio unit (RRU) cable list.

Table 7-1 lists RRU cables.

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Table 7-1 RRU cable list

Cable One End The Other End

RRU PGND Cable

RRU power cable

RRU alarm cable

Connector Installation

Position

M6 OT terminal with a crosssectional area of

Ground terminal on the RRU

16 mm2 (0.02 in.

or 6 AWG)

Easy power receptacle (pressfit type)

NEG(-) and RTN(+) ports on the RRU

connector

DB15 connector EXT_ALM

port on the RRU

Connector Installation

Position

M8 OT terminal with a cross-

Ground terminal on the ground bar

sectional area of 16 mm2 (0.02 in.

or 6 AWG)

Easy power receptacle (pressfit type) connector

One of six ports (RRU0-RRU5) on the embedded power subrack unit (EPU)

One of six ports (LOAD0LOAD5) on the direct current distribution unit-11B (DCDU-11B)

Cord end terminal

External alarm device

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Cable One End The Other End

Multi-mode common public radio interface (CPRI) optical fiber

Connector Installation

Position

DLC connector CPRI0 port on

the RRU

CPRI1 port on the RRU

Connector Installation

Position

DLC connector Code Division

Multiple Access (CDMA) +Universal Mobile Telecommunications System (UMTS) mode

SFP port on the HCPM or HECM in the baseband unit (BBU)

CPRI port on the WBBP in the BBU

CDMA+Long Term Evolution (LTE) mode

SFP port on the Huawei Enhanced Radio Terminal (HERT) channel processing module (HCPM) or HERT enhance channel processing (HECM) in the BBU

CPRI port on the LTE baseband processing unit (LBBP) in the BBU

Single-mode CPRI optical

DLC connector CPRI0 port on

the RRU

fiber

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DLC connector CDMA only (CO)

mode

SFP port on the HCPM or HECM in the BBU

RRU3642 Installation Guide 7 Installing RRU Cables

Cable One End The Other End

RRU radio frequency (RF) jumper

Inter-RRU RF cable

AISG multiwire cable for the RRU

RRU AISG extension cable

Connector Installation

Position

DIN male connector

DB2W2 connector

Waterproof DB9 male connector

Standard AISG male connector

ANT_TX/ RXA or ANT_TX/ RXB port on the RRU

RX_IN/OUT port on the RRU

RET port on the RRU

Standard AISG female connector on the AISG multi-wire cable

Connector Installation

Position

DIN male connector

DB2W2 connector

Standard AISG female connector

Antenna system

RX_IN/OUT port on the RRU

Standard AISG male connector on the remote control unit (RCU) or on the AISG extension cable

Standard AISG male connector on the RCU

7.5 Installing the RRU PGND Cable

This section describes the procedure for installing a remote radio unit (RRU) protection ground (PGND) cable.

Context

The cross-sectional area of the RRU3642 PGND cable is 16 mm2 (0.02 in.2 or 6 AWG). One end of the cable is terminated with an M6 OT terminal, and other end is terminated with an M8 OT terminal.

Procedure

Step 1 Prepare an RRU PGND cable.

1. Cut off the extra length of a PGND cable based on the required cable route.

2. Install an OT terminal on each end of the cable by referring to Assembling the OT Terminal and the Power Cable.

Step 2 Install the RRU PGND cable.

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Connect the M6 OT terminal at one end of the PGND cable to the ground terminal at the bottom of the RRU, and connect the M8 OT terminal at the other end of the PGND cable to the external ground bar, as shown in Figure 7-8.

Figure 7-8 Installing the RRU PGND cable

NOTE

You must correctly crimp the OT terminals in the direction shown in Figure 7-9.

Figure 7-9 Direction for crimping OT terminals

Step 3 Label the installed cable by referring to Attaching a Cable-Tying Label.

----End

7.6 Installing an RRU RF Jumper

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

Procedure

Step 1 Link the DIN connector at one end of the RF jumper to the ANT port and use a torque wrench

to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure 7-10.

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Figure 7-10 Installing an RRU RF jumper

CAUTION

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 Link 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 7-11.

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Figure 7-11 Waterproofing a connector of the RF jumper

(1) Waterproof tape

NOTE

l Before wrapping waterproof tape, stretch the tape evenly until the width of the tape is half of its original

width.

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.

(2) PVC insulation tape

1. Wrap each connector with three layers of waterproof tape, from bottom up, then from top down, and finally from bottom up. Start the wrapping at the position 50 mm (1.97 in.) away from the bottom of the connector. Do not cut the tape until all the three layers of the tape are already wrapped. Wrap each layer of tape around the connector tightly.

2. Wrap each connector with three layers of PVC insulation tape, from bottom up, then from top down, and finally from bottom up. Start the wrapping at the position 30 mm (1.18 in.) away from the bottom of the connector. Do not cut the tape until all the three layers of the tape are already wrapped. Wrap each layer of tape around the connector tightly.

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

waterproofed, as shown in Figure 7-12.

CAUTION

Do not remove dustproof caps from vacant antenna connectors.

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Figure 7-12 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 width of the tape is half of its original

width.

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.

1. Verify that dustproof caps are not removed.

2. Wrap each dustproof cap 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. Wrap each layer of tape around the cap tightly.

3. Wrap each dustproof cap with three layers of PVC insulation 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. Wrap each layer of tape around the connector tightly.

Step 5 Lay out the jumper by referring to 7.1 Cabling Requirements, and then bind the jumper using

cable ties.

Step 6 Label the installed jumper by referring to Attaching a Sign Plate Label.

Step 7 Attach colored insulation tapes to the jumper by referring to Attaching the Color Ring.

----End

7.7 Installing an Inter-RRU RF Cable

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

Procedure

Step 1 Link the DB2W2 connector at one end of the RF cable to the RX_IN/OUT port of an RRU, and

link the other end to the RX_IN/OUT port of the other RRU, as shown in Figure 7-13.

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Figure 7-13 Installing an inter-RRU RF cable

Step 2 Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable

ties.

Step 3 Label the installed cable by referring to Attaching an L-Shaped Label.

----End

7.8 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. 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 7-14.

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Figure 7-14 Installing an RRU AISG multi-wire cable

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

3. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable

using cable ties.

4. Label the installed cable by referring to Attaching an L-Shaped Label.

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

1. 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 7-15.

Figure 7-15 Installing an RRU AISG multi-wire cable

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2. Connect the other end of the AISG extension cable to the standard AISG male

connector on the RCU, as shown in Figure 7-16.

Figure 7-16 Installing an RRU AISG multi-wire cable

3. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable

using cable ties.

4. Label the installed cable by referring to Attaching an L-Shaped Label.

----End

7.9 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.

CAUTION

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

Step 2 Loosen the protection screw on the cover plate of the RRU cabling cavity using an M4 Phillips

screwdriver, and then lower the handle to open the cover plate, as shown in Figure 7-17.

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Figure 7-17 Opening the cover plate of the RRU cabling cavity

(1) Protection screw

Figure 7-18 shows the RRU cabling cavity.

Figure 7-18 RRU cabling cavity

(1) Cover plate

(4) Cable trough for the power cable

(2) Cable diagram on labels (3) Cable trough for the fiber optic

(5) Cable trough for the alarm cable (6) Waterproof block

cable

(7) Clip (8) Cabling cavity -

Step 3 Loosen the screws on the clip, and open the clip, as shown Figure 7-19.

NOTE

Open the clip only for the associated cable.

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Figure 7-19 Opening clips

----End

7.10 Installing an RRU power cable

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

Prerequisite

l An easy power receptacle (pressfit type) connector is added to the RRU power cable on

the RRU side. For details, see 10.1 Adding an Easy Power Receptacle (Pressfit Type)

Connector to the RRU Power Cable on the RRU Side.

l A connector or OT terminals are added to the RRU power cable on the power device side.

For details, see the DBS3900 Installation Guide.

Context

The cross-sectional area of the RRU power cable is 6 mm2 (0.009 in.2).

Procedure

l Install an RRU power cable that feeds power to an RRU from a DCDU-11B when the

DCDU-11B is configured.

1. Link the easy power receptacle (pressfit type) connector at one end of the RRU power

cable to the power supply socket on the RRU, as shown in Figure 7-20.

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Figure 7-20 Installing an RRU power cable

CAUTION

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

2. Link the easy power receptacle (pressfit type) connector at the other end of the RRU

power cable to the LOAD0 port on the DCDU-11B.

NOTE

One DCDU-11B can supply power to a maximum of six RRUs. The RRU power cable can be connected to any wiring terminal from LOAD0 to LOAD5 on the DCDU-11B.

3. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable

using cable ties.

4. Label the installed cable by referring to Attaching a Cable-Tying Label.

l Install an RRU power cable that feeds power to an RRU from an EPU when the EPU is

configured.

1. Link the easy power receptacle (pressfit type) connector at one end of the RRU power

cable to the power supply socket on the RRU, as shown in Figure 7-20.

2. Link the easy power receptacle (pressfit type) connector at one end of the RRU power

cable to the RRU0 port on the EPU subrack.

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NOTE

l The blue core wire in the easy power receptacle (pressfit type) connector is linked to the

left port on the EPU subrack, and the black/brown core wire is linked to the right port on the EPU subrack.

l The EPU can supply power to a maximum of six RRUs. The RRU power cable can be

connected to any of RRU0 to RRU5 ports on the EPU.

3. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable

using cable ties.

4. Label the installed cable by referring to Attaching a Cable-Tying Label.

----End

7.11 Installing a CPRI Fiber Optic Cable

This section describes the procedure for installing a CPRI fiber optic cable.

Prerequisite

Before the installation, single-mode optical modules can be distinguished from multi-mode 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 multi-mode optical module.

l Color of the puller on an optical module: Blue indicates a single-mode optical module, and

black or gray indicates a multi-mode optical module.

Context

Procedure

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

CAUTION

The optical modules to be installed must match CPRI rates.

A CPRI fiber optic cable transmits CPRI signals between a BBU and an RRU.

For details about CPRI fiber optic cable connections, see the descriptions of connections for the CPRI fiber optic cable in the BBU3900 Hardware Description.

RRU and the other optical module into the CPRI port on the BBU, and then raise the pullers, as shown in Figure 7-21.

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Figure 7-21 Installing an optical module

CAUTION

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 fiber optic cable to the optical module on the RRU

side, as shown in Figure 7-22.

Figure 7-22 Installing a CPRI fiber optic cable

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CAUTION

Install the fiber optic cable in the cable clip near the power cable to leave some slack at the bend. Tighten the screws on the cable clip to 1.4 N·m (12.39 lbf·in.).

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

side.

Step 4 Lay out the fiber optic cable by referring to 7.1 Cabling Requirements, and then bind the cable

using cable ties.

Step 5 Label the fiber optic cable by referring to Attaching an L-Shaped Label.

----End

7.12 Installing an RRU Alarm Cable

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

Procedure

Step 1 Link the DB15 connector at one end of the RRU alarm cable to the EXT_ALM port on the RRU,

and link the eight cord end terminals at the other end to the external alarm device, as shown in

Figure 7-23.

Figure 7-23 Installing an RRU alarm cable

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Step 2 Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable

ties.

Step 3 Label the installed cable by referring to Attaching an L-Shaped Label.

----End

7.13 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 clips and tighten the screws on each clip to 1.4 N·m (12.39 lbf·in.) using a torque

screwdriver, as shown in Figure 7-24.

Figure 7-24 Closing clips

CAUTION

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

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

7-25.

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Figure 7-25 Correct placement of waterproof blocks

Step 3 Close the cover plate of the RRU cabling cavity and tighten the screws on the cover plate to 0.8

N·m (7.08 lbf·in.) using a torque screwdriver, as shown in Figure 7-26.

Figure 7-26 Closing the cover plate of the RRU cabling cavity

(1) Protection screw

CAUTION

l Before tightening the screws on the cover plate, ensure that cables and waterproof blocks are

properly inserted into troughs.

l Tighten the screws on the cover plate in the sequence shown in the figure.

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

----End

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RRU3642 Installation Guide 8 Checking the RRU Hardware Installation

8 Checking the RRU Hardware Installation

After an RRU is installed, check the hardware installation.

Table 8-1 provides the checklist for the RRU hardware installation.

Table 8-1 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.

2 The RRU is securely installed.

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

4 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.

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

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

or crimped.

7 None of power cables and PGND cables can be short-circuited or reversely

connected. In addition, these cables are not damaged or broken.

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

9 The protection grounding of the RRU and the surge protection grounding of the

building share one group of ground conductors.

10 The connectors of each signal cable are intact and securely linked, and these cables

are not damaged or broken.

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

jumper.

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RRU3642 Installation Guide 9 Powering On an RRU

9 Powering On an RRU

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

CAUTION

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 9-1 shows the RRU power-on check process.

Figure 9-1 RRU power-on check process

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RRU3642 Installation Guide 10 Appendix

10 Appendix

About This Chapter

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

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

the RRU Side

This section describes the procedure for adding an easy power receptacle (pressfit type) connector to the RRU power cable on the RRU side.

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RRU3642 Installation Guide 10 Appendix

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

This section describes the procedure for adding an easy power receptacle (pressfit type) connector to the RRU power cable on the RRU side.

Procedure

Step 1 Figure 10-1 shows the cable diagram on labels.

Figure 10-1 Cable diagram on labels

(1) Cable diagram on labels

Step 2 Determine the length of the power cable for different operations based on the labels, as shown

in Figure 10-2.

Figure 10-2 Determining the length of the power cable

Step 3 Strip the specified length of the sheath off the power cable, as shown in Figure 10-3.

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RRU3642 Installation Guide 10 Appendix

Figure 10-3 Stripping the specified length of sheath

Step 4 Strip a specified length of sheath off each core wire. The length must be consistent with the

length of the notch in the easy power receptacle (pressfit type) connector, as shown in Figure

10-4.

Figure 10-4 Stripping the sheath off each core wire

Figure 10-5 Matched length

Step 5 Add an easy power receptacle (pressfit type) connector to two core wires.

1. Tighten the screws using a Phillips screwdriver, as shown in Figure 10-6.

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RRU3642 Installation Guide 10 Appendix

Figure 10-6 Tightening screws

2. Connect the blue core wire labeled NEG(-) to the - port and the black/brown core wire labeled RTN(+) to the + port on the easy power receptacle (pressfit type) connector, and then tighten the screws using a Phillips screwdriver, as shown in Figure 10-7.

Figure 10-7 Adding an easy power receptacle (pressfit type) connector to two core wires

Step 6 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as

shown in Figure 10-8.

Figure 10-8 Stripping the sheath off the power cable

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RRU3642 Installation Guide 10 Appendix

CAUTION

Each core wire is exposed outside the easy power receptacle (pressfit type) connector for 1.5 mm (0.059 [in.]), as shown in Figure 10-9.

Figure 10-9 Inserting core wires into the easy power receptacle (pressfit type) connector

----End

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Huawei RRU3642 800M Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Document

Contents

1 Changes in the RRU3642 Installation Guide

2 Installation Preparations

2.1 Reference Documents

2.2 Tools and Instruments

2.3 Skills and Requirements for Onsite Personnel

3 Information About the Installation

3.1 RRU Exterior

3.2 RRU Ports

3.3 RRU Indicators

3.4 Installation Options

3.5 Installation Clearance Requirements of an RRU

3.5.1 Installation Clearance for a Single RRU

3.5.2 Installation Clearance for Multiple RRUs

3.5.3 Installation Spacing Between RRUs

4 Unpacking the Equipment

5 Installation Process

6 Installing the RRU

6.1 Mounting Kits for an RRU

6.2 Installing the RRU on a Pole

6.2.1 Installing a Single RRU

6.2.2 Installing Two RRUs

6.2.3 Installing Multiple RRUs

6.3 Installing the RRU on U-steel

6.4 Installing the RRU on Angle Steel

6.5 Installing the RRU on a Wall

6.6 Hoisting an RRU onto a Tower

7 Installing RRU Cables

7.1 Cabling Requirements

7.2 Cable Connections

7.3 Installation Process

7.4 RRU Cable List

7.5 Installing the RRU PGND Cable

7.6 Installing an RRU RF Jumper

7.7 Installing an Inter-RRU RF Cable

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

7.9 Opening the Cover Plate of an RRU Cabling Cavity

7.10 Installing an RRU power cable

7.11 Installing a CPRI Fiber Optic Cable

7.12 Installing an RRU Alarm Cable

7.13 Closing the Cover Plate of an RRU Cabling Cavity

8 Checking the RRU Hardware Installation

9 Powering On an RRU

10 Appendix

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