Huawei Technologies RRU3841 Remote Radio Unit User Manual Installation Guide

Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide

Contents

Installation Guide

RRU3841Installation GuideIssue Draft ADate 2012-01-10HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent 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. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase 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 representationsof any kind, either express or implied.The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial BaseBantian, LonggangShenzhen 518129People's Republic of ChinaWebsite: http://www.huawei.comEmail: support@huawei.comIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.i
About This DocumentPurposeThis document describes the process of installing a DC RRU3841 (referred to as RRU in thisdocument).Product VersionThe following table lists the product version related to this document.Product Name Product VersionDBS3900 LTE V100R004C00 and later versions Intended AudienceThis document is intended for:Base station installation engineersOrganization1 Changes in the RRU3841 Installation GuideThis chapter describes the changes in the RRU3841 Installation Guide.2 Installation PreparationsThis chapter describes the reference documents, tools, and instruments that must be ready beforethe installation. In addition, it specifies the skills and prerequisites that installation engineersmust have.3 Information About the InstallationBefore installing an RRU, you must be familiar with its exterior, ports, installation options,physical supports, and installation clearance requirements.4 Unpacking the EquipmentUnpack and check the delivered equipment to ensure that all the materials are included and intact.RRU3841Installation Guide About This DocumentIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.ii
5 Installation ProcessThe installation process involves installing an RRU and RRU cables, checking the RRUhardware installation, and powering on the RRU.6 Hoisting an RRU and Related Cables onto a TowerThis section describes the procedure for hoisting an RRU and related cables onto a tower andthe precautions that must be taken.7 Installing the RRUThis 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 oninstallation options.8 Installing RRU CablesThis chapter describes the procedure for installing RRU cables.9 Checking the RRU Hardware InstallationAfter an RRU is installed, check the hardware installation.10 Powering On an RRUAfter all the devices are installed, check the power-on status of an RRU.11 AppendixThis section describes the procedure for adding an easy power receptacle (pressfit type)connector.ConventionsSymbol ConventionsThe symbols that may be found in this document are defined as follows.Symbol DescriptionIndicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.Indicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.Indicates a tip that may help you solve a problem or savetime.Provides additional information to emphasize or supplementimportant points of the main text. RRU3841Installation Guide About This DocumentIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iii
General ConventionsThe general conventions that may be found in this document are defined as follows.Convention DescriptionTimes New Roman Normal paragraphs are in Times New Roman.Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.Italic Book titles are in italics.Courier New Examples of information displayed on the screen are inCourier New. Command ConventionsThe command conventions that may be found in this document are defined as follows.Convention DescriptionBoldface 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 byvertical bars. One item is selected.[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.{ x | y | ... }*Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.[ x | y | ... ]*Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected. GUI ConventionsThe GUI conventions that may be found in this document are defined as follows.Convention DescriptionBoldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.>Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder. RRU3841Installation Guide About This DocumentIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iv
Keyboard OperationsThe keyboard operations that may be found in this document are defined as follows.Format DescriptionKey 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 meansthe two keys should be pressed in turn. Mouse OperationsThe mouse operations that may be found in this document are defined as follows.Action DescriptionClick Select and release the primary mouse button without movingthe pointer.Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.Drag Press and hold the primary mouse button and move thepointer to a certain position.RRU3841Installation Guide About This DocumentIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.v
ContentsAbout This Document.....................................................................................................................ii1 Changes in the RRU3841 Installation Guide...........................................................................12 Installation Preparations..............................................................................................................22.1 Reference Documents.........................................................................................................................................32.2 Tools and Instruments........................................................................................................................................32.3 Skills and Requirements for Onsite Personnel...................................................................................................43 Information About the Installation...........................................................................................53.1 RRU Exterior......................................................................................................................................................63.2 RRU Ports...........................................................................................................................................................63.3 RRU Indicators...................................................................................................................................................83.4 Installation Options...........................................................................................................................................103.5 Installation Clearance Requirements of an RRU..............................................................................................143.5.1 Installation Clearance for a Single RRU.................................................................................................153.5.2 Installation Clearance for Multiple RRUs...............................................................................................163.5.3 Installation Spacing Between RRUs........................................................................................................204 Unpacking the Equipment.........................................................................................................235 Installation Process.....................................................................................................................256 Hoisting an RRU and Related Cables onto a Tower............................................................266.1 Hoisting an RRU onto a Tower........................................................................................................................276.2 Hoisting Fiber Optic Cables onto a Tower.......................................................................................................306.3 Hoisting Power Cables onto a Tower...............................................................................................................337 Installing the RRU.......................................................................................................................357.1 Mounting Kits for an RRU...............................................................................................................................367.2 Installing the RRU on a Pole............................................................................................................................367.2.1 Installing a Single RRU...........................................................................................................................397.2.2 Installing Two RRUs...............................................................................................................................417.2.3 Installing Multiple RRUs.........................................................................................................................447.3 Installing the RRU on U-steel..........................................................................................................................477.4 Installing the RRU on Angle Steel...................................................................................................................507.5 Installing the RRU on a Wall...........................................................................................................................53RRU3841Installation Guide ContentsIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vi
8 Installing RRU Cables................................................................................................................588.1 Cabling Requirements......................................................................................................................................608.2 Cable Connections............................................................................................................................................658.3 Installation Process...........................................................................................................................................668.4 RRU Cable List................................................................................................................................................678.5 Installing an RRU PGND Cable.......................................................................................................................688.6 Installing an RRU RF Jumper..........................................................................................................................708.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable.........................................................728.8 Opening the Cover Plate of an RRU Cabling Cavity.......................................................................................758.9 Installing an RRU power cable.........................................................................................................................778.10 Installing a CPRI Fiber Optic Cable...............................................................................................................788.11 Installing an RRU Alarm Cable......................................................................................................................808.12 Closing the Cover Plate of an RRU Cabling Cavity......................................................................................819 Checking the RRU Hardware Installation..............................................................................8410 Powering On an RRU...............................................................................................................8511 Appendix.....................................................................................................................................8611.1 Adding an Tool-less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side...........87RRU3841Installation Guide ContentsIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vii
1 Changes in the RRU3841 Installation GuideThis chapter describes the changes in the RRU3841 Installation Guide.Draft A (2012-01-10)This is the draft.RRU3841Installation Guide 1 Changes in the RRU3841 Installation GuideIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.1
2 Installation PreparationsAbout This ChapterThis chapter describes the reference documents, tools, and instruments that must be ready beforethe installation. In addition, it specifies the skills and prerequisites that installation engineersmust have.2.1 Reference DocumentsBefore the installation, you must be familiar with reference documents.2.2 Tools and InstrumentsAll tools and instruments required for RRU installation must be ready before the installation.2.3 Skills and Requirements for Onsite PersonnelOnsite personnel must be qualified and trained. Before performing any operation, onsitepersonnel must be familiar with correct operation methods and safety precautions.RRU3841Installation Guide 2 Installation PreparationsIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.2
2.1 Reference DocumentsBefore the installation, you must be familiar with reference documents.The following reference documents are required during RRU installation:lRRU3841 Hardware DescriptionlDBS3900 Installation GuidelOCB User Guide2.2 Tools and InstrumentsAll tools and instruments required for RRU installation must be ready before the installation.Hammer drill (a φ 14 bit) ESD gloves Vacuum cleanerHeat gun Phillips screwdriver (M3 toM6)Flat-head screwdriver (M3 toM6)Rubber mallet COAX crimping tool Wire stripperUtility knife Cable cutter Adjustable wrench (capacity≥ 32 mm [1.26 in.])RRU3841Installation Guide 2 Installation PreparationsIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.3
Level Torque screwdriver5 mm(M3 to M6)(M3 to M6)Torque wrenchCapacity: 17 mm [0.67 in.], 21mm [0.82 in.], and 32 mm[1.26 in.]Combination wrenchCapacity: 17 mm [0.67 in.], 21mm [0.82 in.], and 32 mm[1.26 in.]Multimeter Marker (diameter ≤ 10 mm[0.39 in.])Measuring tape 2.3 Skills and Requirements for Onsite PersonnelOnsite personnel must be qualified and trained. Before performing any operation, onsitepersonnel must be familiar with correct operation methods and safety precautions.Before the installation, pay attention to the following items:lThe customer's technical engineers must be trained by Huawei and be familiar with theproper installation and operation methods.lThe number of onsite personnel depends on the engineering schedule and installationenvironment. Generally, only three to five onsite personnel are necessary.RRU3841Installation Guide 2 Installation PreparationsIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.4
3 Information About the InstallationAbout This ChapterBefore installing an RRU, you must be familiar with its exterior, ports, installation options,physical supports, and installation clearance requirements.3.1 RRU ExteriorThis section describes the exterior and dimensions of an RRU.3.2 RRU PortsThis section describes RRU ports positioned on the RRU panels. An RRU has a bottom panel,cabling cavity panel, and indicator panel.3.3 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status.3.4 Installation OptionsThis 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 RRUThis section describes the requirements for the installation clearance of a single RRU andmultiple RRUs and the requirements for the installation spacing between RRUs.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.5
3.1 RRU ExteriorThis 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 PortsThis section describes RRU ports positioned on the RRU panels. An RRU has a bottom panel,cabling cavity panel, and indicator panel.Figure 3-3 shows RRU ports on the panels.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.6
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 panelsItem Label Description(1) Ports at the bottom ANT_TX/RXA TX/RX port A, supporting RET signaltransmissionANT_TX/RXC TX/RX port CANT_TX/RXD TX/RX port DRRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.7
Item Label DescriptionANT_TX/RXB TX/RX port BRX_IN/OUT This port is blocked.RET Communication port for the RET antenna,supporting RET signal transmission(2) Ports in the cablingcavityRTN(+) Power supply socketNEG(-)CPRI0 Optical/electrical port 0CPRI1 Optical/electrical port 1EXT_ALM Port for alarm reporting(3) Indicators RUN For details, see 3.3 RRU Indicators.ALMACTVSWRCPRI0/IR0CPRI1/IR1 NOTEThe port for transmitting RET signals is determined by the software.3.3 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status.For detailed positions of RRU indicators, see 3.2 RRU Ports.Table 3-2 describes RRU indicators.Table 3-2 RRU indicatorsLabel Color Status DescriptionRUN Green On There is power supply, but the module isfaulty.Off There is no power supply, or the module isfaulty.Blinking (on for1s and off for 1s)The module is working properly.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.8
Label Color Status DescriptionBlinking (on for0.125s and off for0.125s)Software is being loaded to the module, orthe module is not started.ALM Red On Alarms are generated, and the module mustbe replaced.Blinking (on for1s and off for 1s)Alarms are generated. The alarms may becaused by the faults on the related boards orports. Therefore, the necessity for modulereplacement is uncertain.Off No alarm is generated.ACT Green On The module is working properly with TXchannels enabled.Blinking (on for1s and off for 1s)The module is working properly with TXchannels disabled.VSWR Red Off No VSWR alarm is generated.Blinking (on for1s and off for 1s)VSWR alarms are generated on theANT_TX/RXB port.On VSWR alarms are generated on theANT_TX/RXA port.Blinking (on for0.125s and off for0.125s)VSWR alarms are generated on theANT_TX/RXA and ANT_TX/RXB ports.CPRI0/IR0 Red andgreenSteady green The CPRI link is available.Steady red An optical module fails to transmit or receivesignals because the optical module is faultyor the fiber optic cable is broken.Blinking red (onfor 1s and off for1s)The CPRI link is out of lock because ofmutual lock of dual-mode clock sources ormismatched data rates over CPRI ports (youare advised to check the system configurationto identify the fault).Off The SFP module is not properly installed, orthe optical module is powered off.CPRI1/IR1 Red andgreenSteady green The CPRI link is available.Steady red An optical module fails to transmit or receivesignals because the optical module is faultyor the fiber optic cable is broken.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.9
Label Color Status DescriptionBlinking red (onfor 1s and off for1s)The CPRI link is out of lock because ofmutual lock of dual-mode clock sources ormismatched data rates over CPRI ports (youare advised to check the system configurationto identify the fault).Off The SFP module is not properly installed, orthe optical module is powered off. 3.4 Installation OptionsThis section describes RRU installation options. An RRU can be installed on a pole, U-steel,angle steel, or wall.Installing an RRU on a PoleFigure 3-4 shows the diameter of pole for installing an RRU.Figure 3-4 Diameter of a pole CAUTIONlThe diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm (4.49in.). The recommended diameter is 80 mm (3.15 in.).lIf the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum oftwo 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.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.10
Figure 3-5 RRU installed on a pole Installing an RRU on U-steelFigure 3-6 shows U-steel specifications.Figure 3-6 U-steel specifications CAUTIONlIt is recommended that only one RRU be installed on U-steel.lThe vertical deviation angle of U-steel must be less than or equal to 10 degrees, as shown inFigure 3-7.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.11
Figure 3-7 Requirements for the vertical deviation angle of U-steel or angle steel(1) RRU (2) U-steel or angle steel Figure 3-8 shows an RRU installed on U-steel.Figure 3-8 RRU installed on U-steel Installing an RRU on Angle SteelFigure 3-9 shows angle steel specifications.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.12
Figure 3-9 Angle steel specifications CAUTIONlIt is recommended that only one RRU be installed on angle steel.lThe vertical deviation angle of angle steel must be less than or equal to 10 degrees, as shownin Figure 3-7.Figure 3-10 shows an RRU installed on angle steel.Figure 3-10 RRU installed on angle steel Installing an RRU on a WallThe wall on which RRUs are installed must meet the following requirements:lWhen a single RRU is installed, the wall has a capacity of bearing at least four times theweight of the RRU.lExpansion bolts must be tightened to 30 N·m (265.52 lbf·in.) to ensure the bolts workproperly and the wall remains intact without cracks in it.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.13
CAUTIONThe brackets cannot be combined when RRUs are installed on a wall, as shown in Figure3-11.Figure 3-11 Correct placement of brackets Figure 3-12 shows an RRU installed on a wall.Figure 3-12 RRU installed on a wall 3.5 Installation Clearance Requirements of an RRUThis section describes the requirements for the installation clearance of a single RRU andmultiple RRUs and the requirements for the installation spacing between RRUs.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.14
NOTEThe recommended installation clearance ensures normal running and provides an appropriate space forOperation and Maintenance (O&M). If there is sufficient space, leave the recommended installationclearance.The minimum installation clearance ensures normal running and heat dissipation, but OM activities suchas checking indicator status and opening the maintenance cavity cannot be properly conducted. If theinstallation space is restricted, leave the minimum installation clearance.3.5.1 Installation Clearance for a Single RRUThis section describes the recommended and minimum installation clearance for a single RRU.Recommended Installation Clearance for a Single RRUFigure 3-13 shows the recommended installation clearance for a single RRU.Figure 3-13 Recommended installation clearance for a single RRU Minimum Installation Clearance for a Single RRUFigure 3-14 shows the minimum installation clearance for a single RRU.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.15
Figure 3-14 Minimum installation clearance for a single RRU Minimum Installation Clearance for a Single RRU Installed on a TowerFigure 3-15 shows the minimum installation clearance for a single RRU installed on a tower.Figure 3-15 Minimum installation clearance for a single RRU installed on a tower 3.5.2 Installation Clearance for Multiple RRUsThis section describes the recommended and minimum installation clearance for multiple RRUs.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.16
Recommended Installation Clearance for Multiple RRUs Installed in CentralizedModeFigure 3-16 shows the recommended installation clearance for multiple RRUs installed incentralized mode.Figure 3-16 Recommended installation clearance for multiple RRUs installed in centralizedmode Minimum Installation Clearance for Multiple RRUs Installed in Centralized ModeFigure 3-17 shows the minimum installation clearance for multiple RRUs installed in centralizedmode.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.17
Figure 3-17 Minimum installation clearance for multiple RRUs installed in centralized mode Recommended Clearance for Multiple RRUs Installed on a Wall in Standard ModeFigure 3-18 shows the recommended clearance for multiple RRUs installed on a wall in standardmode.Figure 3-18 Recommended clearance for multiple RRUs installed on a wall in standard mode RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.18
Minimum Clearance for Multiple RRUs Installed on a Wall in Standard ModeFigure 3-19 shows the minimum clearance for multiple RRUs installed on a wall in standardmode.Figure 3-19 Minimum clearance for multiple RRUs installed on a wall in standard mode Recommended Clearance for Multiple RRUs Side-Mounted on a WallFigure 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 wallRRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.19
3.5.3 Installation Spacing Between RRUsThis section describes the horizontal and vertical installation spacing between RRUs.Recommended Horizontal Spacing Between RRUsFigure 3-21 shows the recommended horizontal spacing between RRUs.Figure 3-21 Recommended horizontal spacing between RRUs Minimum Horizontal Spacing Between RRUsFigure 3-22 shows the minimum horizontal spacing between RRUs.Figure 3-22 Minimum horizontal spacing between RRUs Recommended Vertical Spacing Between RRUsFigure 3-23 shows the recommended vertical spacing between RRUs.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.20
Figure 3-23 Recommended vertical spacing between RRUs Minimum Vertical Spacing Between RRUsFigure 3-24 shows the minimum vertical spacing between RRUs.RRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.21
Figure 3-24 Minimum vertical spacing between RRUsRRU3841Installation Guide 3 Information About the InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.22
4 Unpacking the EquipmentUnpack and check the delivered equipment to ensure that all the materials are included and intact.ContextNOTEWhen transporting, moving, or installing the equipment, components, or parts, you must:lPrevent them from colliding with doors, walls, shelves, or other objects.lWear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweat-soaked gloves, or dirty gloves.CAUTIONlAfter a cabinet or an BBU is unpacked, it must be powered on within 7 days.lAfter an RRU is unpacked, it must be powered on within 24 hours.ProcedureStep 1 Check the total number of articles in each case according to the packing list.If ... Then ...The total number tallies with the packinglistGo to Step 2.The total number does not tally with thepacking listFind out the cause and report any missingarticles to the local Huawei office.Step 2 Check the exterior of the packing case.RRU3841Installation Guide 4 Unpacking the EquipmentIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.23
If ... Then ...The outer packing is intact Go to Step 3.The outer packing is severely damaged orsoakedFind out the cause and report it to the localHuawei office.The vibrating indicator is red Stop unpacking the wooden crate, and thenreport 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 withthose on the packing listSign the Packing List with the customer.There is any shipment shortage or wrongshipmentFill in and submit the Cargo Shortage andMishandling Report.Articles are damaged. Fill in and submit the Article ReplacementReport.WARNINGTo protect the equipment and prevent damage to the equipment, you are advised to keep theunpacked 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 thephotos.----EndRRU3841Installation Guide 4 Unpacking the EquipmentIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.24
5 Installation ProcessThe installation process involves installing an RRU and RRU cables, checking the RRUhardware installation, and powering on the RRU.Figure 5-1 shows the process of installing an RRU.Figure 5-1 Process of installing an RRU RRU3841Installation Guide 5 Installation ProcessIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.25
6 Hoisting an RRU and Related Cables onto aTowerAbout This ChapterThis section describes the procedure for hoisting an RRU and related cables onto a tower andthe precautions that must be taken.6.1 Hoisting an RRU onto a TowerBefore installing an RRU on a tower, bind the RRU and mounting kits and then hoist them ontothe tower. The RRU can be installed on a pole, U-steel, or angle steel. This section describes theprocedure for hoisting the RRU and mounting kits onto the tower and the precautions that mustbe taken.6.2 Hoisting Fiber Optic Cables onto a TowerThis section describes the procedure for hoisting fiber optic cables onto a tower and theprecautions that must be taken.6.3 Hoisting Power Cables onto a TowerThis section describes the procedure for hoisting power cables onto a tower and the precautionsthat must be taken.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.26
6.1 Hoisting an RRU onto a TowerBefore installing an RRU on a tower, bind the RRU and mounting kits and then hoist them ontothe tower. The RRU can be installed on a pole, U-steel, or angle steel. This section describes theprocedure for hoisting the RRU and mounting kits onto the tower and the precautions that mustbe taken.PrerequisitePlace a foam pad or cardboard on the ground to protect the housing of the RRU from damagebefore the binding. Do not stand the RRU upright because the load-bearing capacity of the RFports at the RRU bottom is low.CAUTIONWhen 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 onthe side, and the brackets for more than two RRUs cannot be combined.ProcedureStep 1 Bind the RRU and mounting kits properly using a lifting sling, as shown in Figure 6-1.Figure 6-1 Binding mounting kits for the RRUStep 2 Lead one sling through the lifting eye and RRU handle and use the sling as a lifting sling, andlead the other sling through the RRU handle and use the sling as a traction sling, as shown inFigure 6-2.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.27
Figure 6-2 Binding the RRU(1) Lifting sling (2) Lifting eye (3) Traction sling (4) Handle CAUTIONlEach sling has a maximum load-bearing capacity of 200 kg (441 lb), the diameter of the slingmust 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.lWhen hoisting the RRU and mounting kits onto the tower, protect them from colliding withthe ground and tower.lHoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.lDo not hoist the RRU by the handle or lifting eye only, as shown in Figure 6-3 and Figure6-4.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.28
Figure 6-3 Incorrect binding method Figure 6-4 Incorrect binding method Step 3 Hoist the RRU and mounting kits onto the tower respectively, as shown in Figure 6-5.NOTEHoist mounting kits onto the tower and then install the mounting kits before hoisting the RRU onto thetower. When hoisting the mounting kits and RRU, protect them from colliding with the tower.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.29
Figure 6-5 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 towerplatform 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 slingto the RRU handle.3. Installation engineer B pulls the lifting sling downwards, and installation engineer C pullsthe traction sling outwards to protect the RRU and mounting kits from colliding with thetower.4. Installation engineer A catches the RRU, install the RRU on the main mounting bracketuntil the RRU snaps shut, and then unties the sling.NOTEThe procedure for hoisting the RRU onto the tower is for your reference only.----End6.2 Hoisting Fiber Optic Cables onto a TowerThis section describes the procedure for hoisting fiber optic cables onto a tower and theprecautions that must be taken.ContextCabling requirements for power cables are met. For details, see 8.1 Cabling Requirements.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.30
ProcedureStep 1 Lead one sling through the stretch sling of the fiber optic cables and use the sling as a liftingsling, and use the other sling as a traction sling to secure the cables 4 m (13.12 ft.) away fromthe lifting sling, as shown in Figure 6-6.Figure 6-6 Binding fiber optic cables(1) Lifting sling (2) Stretch sling (3) Traction sling CAUTIONDo not remove the stretch sling and protection pipe or bind fiber optic cables using one sling,as shown in Figure 6-7.Figure 6-7 Incorrect binding methodRRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.31
Step 2 Hoist the fiber optic cables onto the tower, as shown in Figure 6-8.Figure 6-8 Hoisting fiber optic cables onto the towerCAUTIONBefore hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU orBBU 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 towerplatform support and leads the lifting sling through the fixed pulley.2. Place the fiber coiler for coiling fiber optic cables on the fiber spools, and bind the fiberoptic cables using the lifting sling and traction sling.3. Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft.) to 15 m (49.21ft.) per minute to coil the fiber optic cables.4. Installation engineer C pulls the lifting sling downwards, and installation engineer D pullsthe traction sling outwards to protect the fiber optic cables from colliding with the tower.Step 3 Secure the fiber optic cables to the tower vertically using cable clips.Step 4 Remove the lifting sling, traction sling, and protection pipe.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.32
NOTEThe procedure for hoisting the fiber optic cables onto the tower is for your reference only.----End6.3 Hoisting Power Cables onto a TowerThis section describes the procedure for hoisting power cables onto a tower and the precautionsthat must be taken.ContextCabling requirements for power cables are met. For details, see 8.1 Cabling Requirements.ProcedureStep 1 Wrap a packing bag or tape around power cable connectors, use a sling as a lifting sling to securethe power cables 0.4 m (1.31 ft.) away from the power connectors, and use the other sling as atraction sling to secure the power cables 4.4 m (14.44 ft.) away from the power connectors, asshown in Figure 6-9.Figure 6-9 Binding power cables(1) Lifting sling (2) Traction sling Step 2 Hoist the power cables onto the tower, as shown in Figure 6-10.RRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.33
Figure 6-10 Hoisting power cables onto the tower1. After climbing up to the tower, installation engineer A secures the fixed pulley to the towerplatform support and leads the lifting sling through the fixed pulley.2. Installation engineer C binds the power cables using the lifting sling and traction sling.3. Installation engineer B pulls the lifting sling downwards, and installation engineer C pullsthe traction sling outwards to protect the power cables from colliding with the tower.Step 3 Secure the power cables to the tower vertically using cable clips.Step 4 Remove the lifting sling and traction sling.NOTEThe procedure for hoisting the power cables onto the tower is for your reference only.----EndRRU3841Installation Guide 6 Hoisting an RRU and Related Cables onto a TowerIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.34
7 Installing the RRUAbout This ChapterThis 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 oninstallation options.CAUTIONlDo not stand the RRU upright because the load-bearing capacity of the RF ports at the RRUbottom is low.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.7.1 Mounting Kits for an RRUThis section describes the bracket assembly and the attachment plate for an RRU.7.2 Installing the RRU on a PoleOne or more RRUs can be installed on a pole.7.3 Installing the RRU on U-steelThis section describes the procedure for installing the RRU on U-steel and the precautions thatmust be taken during the installation. The RRU installed on U-steel can be mounted to a toweror placed on the ground. It is recommended that only one RRU be installed on U-steel.7.4 Installing the RRU on Angle SteelThis section describes the procedure for installing the RRU on angle steel and the precautionsthat must be taken during the installation. The RRU installed on angle steel can be mounted toa tower or placed on the ground. It is recommended that only one RRU be installed on anglesteel.7.5 Installing the RRU on a WallThis section describes the procedure for installing the RRU on a wall and the precautions thatmust be taken during the installation.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.35
7.1 Mounting Kits for an RRUThis section describes the bracket assembly and the attachment plate for an RRU.Figure 7-1 shows the front and rear view of an RRU.Figure 7-1 Front and rear view of an RRU(1) Cover plate (2) Attachment plate Figure 7-2 shows the bracket assembly for an RRU.Figure 7-2 Bracket assembly for an RRU(1) Auxiliary mountingbracket(2) Dual-nut bolt assembly (3) Main mounting bracket (4) Hoist clamp on themain mounting bracket 7.2 Installing the RRU on a PoleOne or more RRUs can be installed on a pole.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.36
Figure 7-3 shows a single RRU installed on a pole.Figure 7-3 A single RRU installed on a pole Figure 7-4 shows two RRUs installed on a pole.Figure 7-4 Two RRUs installed on a pole Figure 7-5, Figure 7-6, and Figure 7-7 show more than two RRUs installed on a pole.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.37
Figure 7-5 Three RRUs installed on a pole in centralized mode Figure 7-6 Four RRUs installed on a pole in centralized mode RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.38
Figure 7-7 Six RRUs installed on a pole in centralized mode 7.2.1 Installing a Single RRUThis section describes the procedure for installing a single RRU on a pole and the precautionsthat must be taken during the installation.PrerequisiteBefore you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower.For details, see 6.1 Hoisting an RRU onto a Tower.The hoist clamp on the main mounting bracket is secured properly.ProcedureStep 1 Determine a position for installing the main mounting bracket.lIf the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a SingleRRU to determine a position.lIf the RRU must be installed on the ground, see Figure 7-8 to determine a position.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.39
Figure 7-8 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 mountingbracket.Step 3 Install the bracket assembly on the pole, and then fit the other end of the auxiliary mountingbracket to the other dual-nut bolt assembly, as shown in Figure 7-9.Figure 7-9 Installing the bracket assembly NOTEVerify 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 assemblyonto the pole, as shown in Figure 7-10.CAUTIONTighten the two dual-nut bolt assemblies alternatively. After the main and auxiliary brackets aresecured properly, measure the spacing between the brackets on both sides and ensure that thespacing is the same on the two sides.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.40
Figure 7-10 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 Figure7-11.Figure 7-11 Installing the RRU on the main mounting bracket ----End7.2.2 Installing Two RRUsThis section describes the procedure for installing two RRUs on a pole and the precautions thatmust be taken during the installation.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.41
ProcedureStep 1 Install the first RRU, as shown in Figure 7-12. For details, see 7.2.1 Installing a Single RRU.Figure 7-12 Installing the first RRU Step 2 Install the other main mounting bracket on the auxiliary mounting bracket to secure the secondRRU, as shown in Figure 7-13.Figure 7-13 Installing the second main mounting bracket Step 3 Interchange the cover plate and plastic screws in the front and the attachment plate and stainlesssteel screws at the rear of the second RRU, as shown in Figure 7-14.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.42
Figure 7-14 Interchanging the cover plate in the front and the attachment plate at the rear of thesecond 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 theplastic 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 onthe 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 7-15.Figure 7-15 Installing the second RRU on the main mounting bracket ----EndRRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.43
7.2.3 Installing Multiple RRUsThe section describes the procedure for installing multiple RRUs on a pole and the precautionsthat must be taken during the installation.ContextA pole supports the installation of three, four, or six RRUs. The procedures for installing themare the same. Following is the procedure of installing four RRUs on a pole.ProcedureStep 1 Install one set of bracket assembly on a pole. For details, see 7.2.1 Installing a Single RRU.Step 2 Interchange the attachment plate and stainless steel screws at the RRU rear and the cover plateand plastic screws on the RRU side, as shown in Figure 7-16.Figure 7-16 Interchanging the attachment plate at the RRU rear and the cover plate on the RRUside 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 theplastic 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 theattachment 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 7-17.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.44
Figure 7-17 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, asshown in Figure 7-18.Figure 7-18 Installing the second main mounting bracket Step 5 Install the second RRU on the second main mounting bracket, as shown in Figure 7-19.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.45
Figure 7-19 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 mountingbracket, as shown in Figure 7-20.Figure 7-20 Installing the third RRU on the third main mounting bracket Step 7 Install the fourth main mounting bracket, as shown in Figure 7-21.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.46
Figure 7-21 Installing the fourth main mounting bracket Step 8 Install the fourth RRU on the fourth main mounting bracket, as shown in Figure 7-22.Figure 7-22 Installing the fourth RRU on the fourth main mounting bracket ----End7.3 Installing the RRU on U-steelThis section describes the procedure for installing the RRU on U-steel and the precautions thatmust be taken during the installation. The RRU installed on U-steel can be mounted to a toweror placed on the ground. It is recommended that only one RRU be installed on U-steel.PrerequisiteBefore you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower.For details, see 6.1 Hoisting an RRU onto a Tower.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.47
The hoist clamp on the main mounting bracket is secured properly.ContextFigure 7-23 shows the top view of the RRU installed on U-steel.Figure 7-23 Top view of the RRU(1) U-steel ProcedureStep 1 Determine a position for installing the main mounting bracket.lIf the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a SingleRRU to determine a position.lIf the RRU must be installed on the ground, see Figure 7-24 to determine a position.Figure 7-24 Distance between the main mounting bracket and the groundRRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.48
NOTEIt 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 mountingbracket.Step 3 Install the bracket assembly on U-steel, and then fit the other end of the auxiliary mountingbracket to the other dual-nut bolt assembly, as shown in Figure 7-25.Figure 7-25 Installing the bracket assembly NOTEVerify 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 assemblyonto the U-steel, as shown in Figure 7-26.CAUTIONTighten the two dual-nut bolt assemblies alternatively. After the main and auxiliary brackets aresecured properly, measure the spacing between the brackets on both sides and ensure that thespacing is the same on the two sides.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.49
Figure 7-26 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 Figure7-27.Figure 7-27 Installing the RRU on the main mounting bracket ----End7.4 Installing the RRU on Angle SteelThis section describes the procedure for installing the RRU on angle steel and the precautionsthat must be taken during the installation. The RRU installed on angle steel can be mounted toa tower or placed on the ground. It is recommended that only one RRU be installed on anglesteel.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.50
PrerequisiteBefore you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower.For details, see 6.1 Hoisting an RRU onto a Tower.The hoist clamp on the main mounting bracket is secured properly.ContextFigure 7-28 shows the top view of the RRU installed on angle steel.Figure 7-28 Top view of the RRU(1) Angle steel ProcedureStep 1 Determine a position for installing the main mounting bracket.lIf the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a SingleRRU to determine a position.lIf the RRU must be installed on the ground, see Figure 7-29 to determine a position.Figure 7-29 Distance between the main mounting bracket and the ground RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.51
NOTEIt 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 mountingbracket.Step 3 Install the bracket assembly on angle steel, and then fit the other end of the auxiliary mountingbracket to the other dual-nut bolt assembly, as shown in Figure 7-30.Figure 7-30 Installing the bracket assembly NOTEVerify 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 bracketassembly onto the angle steel, as shown in Figure 7-31.CAUTIONTighten the two dual-nut bolt assemblies alternatively. After the main and auxiliary brackets aresecured properly, measure the spacing between the brackets on both sides and ensure that thespacing is the same on the two sides.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.52
Figure 7-31 Securing the bracket assembly onto angle steel Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure7-32.Figure 7-32 Installing the RRU on the main mounting bracket ----End7.5 Installing the RRU on a WallThis section describes the procedure for installing the RRU on a wall and the precautions thatmust be taken during the installation.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.53
PrerequisiteThe hoist clamp on the main mounting bracket is secured properly.ContextThe wall on which RRUs are installed must meet the following requirements:lWhen a single RRU is installed, the wall has a capacity of bearing at least four times theweight of the RRU.lExpansion bolts must be tightened to 30 N·m (265.52 lbf·in.) to ensure the bolts workproperly and the wall remains intact without cracks in it.ProcedureStep 1 Place the auxiliary mounting bracket against the installation position, use a level to verify thatthe auxiliary mounting bracket is placed horizontally, and then mark anchor points with a marker,as shown in Figure 7-33.Figure 7-33 Marking anchor points(1) Auxiliary mounting bracket (2) RRU NOTEIt is recommended that the auxiliary mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) abovethe ground.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.54
Figure 7-34 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 Figure7-35.Figure 7-35 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.).WARNINGTake proper safety measures to protect your eyes and respiratory tract against the dustbefore drilling holes.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.55
2. Hit the expansion bolt with a rubber mallet until the expansion tube completely enters thehole.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 expansionbolt assembly in sequence.NOTEAfter completely removing an expansion bolt, store the plastic tube properly.5. Hammer the bolt into the wall.CAUTIONDo 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 7-36.Figure 7-36 Fitting the auxiliary mounting bracket on expansion bolts CAUTIONVerify 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 7-37.RRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.56
Figure 7-37 Installing the main mounting bracket Step 6 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure7-38.Figure 7-38 Installing the RRU ----EndRRU3841Installation Guide 7 Installing the RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.57
8 Installing RRU CablesAbout This ChapterThis chapter describes the procedure for installing RRU cables.8.1 Cabling RequirementsCables must be routed according to the specified cabling requirements to prevent signalinterference.8.2 Cable ConnectionsThis section describes the cable connections for a single RRU and multiple RRUs.8.3 Installation ProcessThis section describes the process of installing RRU cables.8.4 RRU Cable ListThis section describes RRU cable connections.8.5 Installing an RRU PGND CableThis section describes the procedure for installing an RRU PGND cable.8.6 Installing an RRU RF JumperThis section describes the procedure for installing an RRU RF jumper.8.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension CableThis section describes the procedures for installing an RRU AISG multi-wire cable and AISGextension cable.8.8 Opening the Cover Plate of an RRU Cabling CavityThis section describes the procedure for opening the cover plate of an RRU cabling cavity.8.9 Installing an RRU power cableThis section describes the procedure for installing an RRU power cable.8.10 Installing a CPRI Fiber Optic CableThis section describes the procedure for installing a CPRI fiber optic cable.8.11 Installing an RRU Alarm CableThis section describes the procedure for installing an RRU alarm cable.8.12 Closing the Cover Plate of an RRU Cabling CavityRRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.58
This section describes the procedure for closing the cover plate of an RRU cabling cavity.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.59
8.1 Cabling RequirementsCables must be routed according to the specified cabling requirements to prevent signalinterference.NOTEIf a cable listed below is not required, skip the routing requirements of the cable.General Cabling RequirementsRequirements for Bending RadiuslThe bending radius of the 7/8'' feeder must be more than 250 mm (9.84 in.), and the bendingradius of the 5/4'' feeder must be more than 380 mm (14.96 in.).lThe bending radius of the 1/4'' jumper must be more than 35 mm (1.38 in.). The bendingradius of the super-flexible 1/2'' jumper must be more than 50 mm (1.97 in.), and the bendingradius of the ordinary 1/2'' jumper must be more than 127 mm (5 in.).lThe bending radius of the power cable or PGND cable must be at least three times thediameter of the cable.lThe bending radius of a fiber optic cable is at least 20 times the diameter of the fiber opticcable, and the minimum bending radius of the breakout cable at each end of the fiber opticcable is 30 mm (1.18 in.).lThe bending radius of the E1/T1 cable must be at least three times the diameter of the cable.lThe bending radius of the signal cable must be at least five times the diameter of the cable.Requirements for Cable BindinglThe same types of cable must be bound together.lDifferent types of cable must be separately routed with the minimum spacing of 30 mm(1.18 in.) and cannot be entangled.lThe cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.lCable ties are installed in the same direction, and those at the same horizontal line must bein a straight line.lThe excess of indoor cable ties is trimmed off, and the excess of outdoor cable ties allowsabout 5 mm (0.2 in.), without remaining rough edges.lLabels or nameplates must be attached to both ends, joints, or turns of cables after they areinstalled.Security RequirementslCables should be placed away from sharp objects or wall burrs. If these positions areinevitable, protect the cables with protection pipes.lCables must be routed away from heat sources, or heat-insulation materials are addedbetween cables and heat sources.lSufficient slack (recommended for about 0.1 m [0.33 ft.]) is provided in cables at turns orthe position close to a device, facilitating cable and device maintenance.Indoor Cabling RequirementslCables are routed indoors through the feeder window.lDrip loops must be made outside the feeder window, and the requirements for the minimumbending radius are met.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.60
lWhen cables are routed indoors, engineers are required indoors for cooperation.lThe feeder window must be waterproofed.Outdoor Cabling RequirementslCables routed outdoors must be led through a pipe when they may be damaged.lAC power cables, transmission cables, and cables buried in the ground must be protected.lIf cables at the cabinet bottom need to be routed through a pipe along the ground, lead thepipe 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 atthe cabinet bottom with metal piece.lIf 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 routedthrough the cable hole at the cabinet bottom.lCables are secured with cable clips.lCables are routed neatly along the specified cabling direction and secured with cable clips.lThe positions for cable clips are determined onsite. For example, the cable clips for the7/8" feeder are installed at the spacing of 1.5 m (4.92 ft.) to 2 m (6.56 ft.) in the samedirection, and the cable clips for the power cables are installed at the spacing of 1 m (3.28ft.) to 1.5 m (4.92 ft.) in the same direction.lCable clips must be vertical with cables, and the cables in a cable clip must be parallel.lAfter routing cables neatly and correctly, tighten the screws on cable clips.Secure cables on the cable tray, as shown in Figure 8-1.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.61
Figure 8-1 Securing cables on the cable tray Secure cables on the tower, as shown in Figure 8-2.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.62
Figure 8-2 Securing cables on the tower Special Cabling RequirementsCabling Requirements for Power CableslPower cables must be installed in the position specified in engineering design documents.lIf the length of power cables is insufficient, replace the cables rather than adding connectorsor soldering joints to lengthen the cables.lCables must be routed by only qualified and trained personnel before all preparations aremade.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.63
lCables are routed in an untangled and orderly fashion.lIf DC power cables need to be routed on the tower platform, lay out the cables on theguardrail with the shortest distance and route the cables along the guardrail.lIf DC power cables need to be routed close to a device on the tower, secure the cables tothe guardrail or pole with cable clips. The device cannot be far away from the position forsecuring the cables.Cabling Requirements for PGND CableslPGND cables for the base station must be connected to the same ground bar.lPGND cables must be buried in the ground or routed indoors. They should not be routedoverhead before they are led into the equipment room.lThe exterior of the coaxial wire and the shield layer of the shielded cable must have properelectrical contact with the metal surface of the equipment to which they are connected.lPGND cables and signal cables must be installed in an untangled and orderly fashion. Acertain distance must be reserved between them to prevent interference from each other.lFuses or switches must not be installed on the PGND cables.lOther devices must not be used for electrical connections of the PGND cables.lAll the metal parts in the housing of the equipment must be reliably connected to the groundterminal.Cabling Requirements for E1 CableslE1 cables must not cross power cables, PGND cables, or RF cables when routed. Iftransmission 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.).lE1 cables are routed straightly and bound neatly with cable ties.lSufficient slack is provided in E1 cables at turns.Cabling Requirements for Fiber Optic CableslFiber optic cables must be routed by at least three qualified and trained personnel beforeall preparations are made.lFiber optic cables are used within the temperature range of -40°C to 60°C. If the currenttemperature is out of the range, make protection measures or route the cables again.lCables are routed in an untangled and orderly fashion.lDo not bind fiber optic cables at turns.lDo not stretch, step on, or place heavy objects on fiber optic cables. Keep the cables awayfrom sharp objects.lWhen fiber optic cables are routed, the excess of the cables must be coiled around specialdevices, such as a fiber coiler.lWhen coiling fiber optic cables, apply even strength. Do not bend the cables with force.lVacant optical connectors must be covered with dustproof caps.lFiber optic cables cannot be squeezed by the cabinet door when routed through the cabinet.lIf fiber optic cables need to be routed on the tower platform, lay out the cables on theguardrail with the shortest distance and route the cables along the guardrail.lIf fiber optic cables need to be routed close to a device on the tower, secure the cables tothe guardrail or pole with cable clips. The device cannot be far away from the position forsecuring the cables.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.64
lIf the fiber optic cables close to a device are too long, coil the excess of the cables andsecure them on the tower.8.2 Cable ConnectionsThis section describes the cable connections for a single RRU and multiple RRUs.NOTEA lower-level RRU obtains power directly from the external power system, but not from an upper-levelRRU using a power cable.Figure 8-3 shows the cable connections for a single RRU.Figure 8-3 Cable connections for a single RRU(1) PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable(4) RRU AISG extension cable (5) RRU power cable (6) CPRI fiber optic cable(7) RRU alarm cable - - Figure 8-4 shows the cable connections for multiple RRUs.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.65
Figure 8-4 Cable connections for multiple RRUs(1) PGND cable (2) RRU RF jumper (3) RRU power cable(4) CPRI fiber optic cable - - 8.3 Installation ProcessThis section describes the process of installing RRU cables.Figure 8-5 shows the process of installing RRU cables.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.66
Figure 8-5 Process of installing RRU cables 8.4 RRU Cable ListThis section describes RRU cable connections.Table 8-1 lists RRU cables.Table 8-1 RRU cablesCable One End The Other EndConnector InstallationPositionConnector InstallationPositionRRU PGNDCableOT terminal (M6,16 mm2 [0.025 in.2])Groundterminal on theRRUOT terminal(M8, 16 mm2[0.025 in.2])Ground terminalon the ground barRRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.67
Cable One End The Other EndConnector InstallationPositionConnector InstallationPositionRRU PowerCableEasy powerreceptacle(pressfit type)connectorNEG(-) andRTN(+) portson the RRUEasy powerreceptacle(pressfit type)connectorOne of RRU0 toRRU5 ports onthe EPUOne of LOAD0 toLOAD5 ports onthe DCDU-11BRRU AlarmCableDB15 connector EXT_ALMport on theRRUCord endterminalExternal alarmdeviceCPRI FiberOptic CableDLC connector CPRI0 port onthe RRUDLC connector CPRI port on theLBBP in the BBURRU RFJumperDIN maleconnectorANT_TX/RXA port onthe RRUANT_TX/RXB port onthe RRUDIN maleconnectorAntenna systemRRU AISGMulti-WireCableWaterproofedDB9 maleconnectorRET port onthe RRUStandard AISGfemale connectorStandard AISGmale connectoron the RCU or onthe AISGextension cableRRU AISGExtensionCableStandard AISGmale connectorStandard AISGfemaleconnector onthe AISGmulti-wirecableStandard AISGfemale connectorStandard AISGmale connectoron the RCU 8.5 Installing an RRU PGND CableThis section describes the procedure for installing an RRU PGND cable.ContextThe cross-sectional area of an RRU PGND cable is 16 mm2 (0.025 in.2). The OT terminals attwo ends of the cable are M6 and M8 terminals respectively.ProcedureStep 1 Prepare an RRU PGND cable.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.68
1. Cut the cable to the required length based on the actual cable route.2. Add an OT terminal to each end of the cable by referring to Assembling the OT Terminaland 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 RRUbottom and the M8 OT terminal at the other end to the external ground bar, as shown in Figure8-6.Figure 8-6 Installing an RRU PGND cable NOTECrimp OT terminals in correct positions, as shown in Figure 8-7.Figure 8-7 Correct position of an OT terminal Step 3 Label the installed cable by referring to Attaching a Cable-Tying Label.----EndRRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.69
8.6 Installing an RRU RF JumperThis section describes the procedure for installing an RRU RF jumper.ProcedureStep 1 Link the DIN connector at one end of the RF jumper to the ANT port and use a torque wrenchto tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure 8-8.Figure 8-8 Installing an RRU RF jumper CAUTIONOn AC-powered electric railways, such as high speed railways, when leaky cables are connectedto RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRURF 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 8-9.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.70
Figure 8-9 Waterproofing a connector of the RF jumper (1) Waterproof tape (2) PVC insulation tapeNOTElBefore wrapping waterproof tape, stretch the tape evenly until the width of the tape is half of its originalwidth.lWrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlapsmore than 50% of the preceding layer.1. Wrap each connector with three layers of waterproof tape, from bottom up, then from topdown, and finally from bottom up. Start the wrapping at the position 50 mm (1.97 in.) awayfrom the bottom of the connector. Do not cut the tape until all the three layers of the tapeare 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 fromtop 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 thetape 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 bewaterproofed, as shown in Figure 8-10.CAUTIONDo not remove dustproof caps from vacant antenna connectors.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.71
Figure 8-10 Waterproofing a dustproof cap(1) Dustproof cap (2) Waterproof tape (3) PVC insulation tapeNOTElBefore wrapping waterproof tape, stretch the tape evenly until the width of the tape is half of its originalwidth.lWrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlapsmore 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 fromtop down, and finally from bottom up. Do not cut the tape until all the three layers of thetape 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, thenfrom top down, and finally from bottom up. Do not cut the tape until all the three layers ofthe tape are already wrapped. Wrap each layer of tape around the connector tightly.Step 5 Lay out the jumper by referring to 8.1 Cabling Requirements, and then bind the jumper usingcable 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.----End8.7 Installing an RRU AISG Multi-Wire Cable and AISGExtension CableThis section describes the procedures for installing an RRU AISG multi-wire cable and AISGextension cable.ContextWhen the distance between an RRU and a Remote Control Unit (RCU) is longer than 5 m (16.4ft.), 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.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.72
ProcedurelInstall 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 theRET port on the RRU bottom, as shown in Figure 8-11.Figure 8-11 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 8.1 Cabling Requirements, and then bind the cableusing cable ties.4. Label the installed cable by referring to Attaching an L-Shaped Label.lInstall 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 theRET port on the RRU bottom, and link the other end to the standard AISG maleconnector of the AISG extension cable, as shown in Figure 8-12.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.73
Figure 8-12 Installing an RRU AISG multi-wire cable 2. Connect the other end of the AISG extension cable to the standard AISG maleconnector on the RCU, as shown in Figure 8-13.Figure 8-13 Installing an RRU AISG multi-wire cable 3. Lay out the cable by referring to 8.1 Cabling Requirements, and then bind the cableusing cable ties.4. Label the installed cable by referring to Attaching an L-Shaped Label.----EndRRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.74
8.8 Opening the Cover Plate of an RRU Cabling CavityThis section describes the procedure for opening the cover plate of an RRU cabling cavity.ProcedureStep 1 Wear ESD gloves.CAUTIONTake proper ESD protection measures, for example, wear ESD gloves, to prevent electrostaticdamage 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 Phillipsscrewdriver, and then lower the handle to open the cover plate, as shown in Figure 8-14.Figure 8-14 Opening the cover plate of the RRU cabling cavity(1) Protection screw Figure 8-15 shows the RRU cabling cavity.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.75
Figure 8-15 RRU cabling cavity(1) Cover plate (2) Cable diagram on labels (3) Cable trough for the fiber opticcable(4) Cable trough for the powercable(5) Cable trough for the alarm cable (6) Waterproof block(7) Clip (8) Cabling cavity - Step 3 Loosen the screws on the clip, and open the clip, as shown Figure 8-16.NOTEOpen the clip only for the associated cable.Figure 8-16 Opening clipsRRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.76
----End8.9 Installing an RRU power cableThis section describes the procedure for installing an RRU power cable.PrerequisitelAn tool-less female connector (pressfit type) is added to the RRU power cable on the RRUside. For details, see 11.1 Adding an Tool-less Female Connector (Pressfit Type) to theRRU Power Cable on the RRU Side.lA connector or OT terminals are added to the RRU power cable on the power device side.For details, see the DBS3900 Installation Guide.ContextThe cross-sectional area of the RRU power cable is 6 mm2 (0.009 in.2).ProcedurelInstall an RRU power cable that feeds power to an RRU from a DCDU-11B when theDCDU-11B is configured.1. Link the tool-less female connector (pressfit type) at one end of the RRU power cableto the power supply socket on the RRU, as shown in Figure 8-17.Figure 8-17 Installing an RRU power cable RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.77
CAUTIONEnsure that the exposed shield layer of the power cable is properly tightened usingthe clip.2. Link the tool-less female connector (pressfit type) at the other end of the RRU powercable to the LOAD0 port on the DCDU-11B.NOTEOne DCDU-11B can supply power to a maximum of six RRUs. The RRU power cable can beconnected to any wiring terminal from LOAD0 to LOAD5 on the DCDU-11B.3. Lay out the cable by referring to 8.1 Cabling Requirements, and then bind the cableusing cable ties.4. Label the installed cable by referring to Attaching a Cable-Tying Label.lInstall an RRU power cable that feeds power to an RRU from an EPU when the EPU isconfigured.1. Link the tool-less female connector (pressfit type) at one end of the RRU power cableto the power supply socket on the RRU, as shown in Figure 8-17.2. Link the tool-less female connector (pressfit type) at one end of the RRU power cableto the RRU0 port on the EPU subrack.NOTElThe blue core wire in the tool-less female connector (pressfit type) is linked to the left porton the EPU subrack, and the black/brown core wire is linked to the right port on the EPUsubrack.lThe EPU can supply power to a maximum of six RRUs. The RRU power cable can beconnected to any of RRU0 to RRU5 ports on the EPU.3. Lay out the cable by referring to 8.1 Cabling Requirements, and then bind the cableusing cable ties.4. Label the installed cable by referring to Attaching a Cable-Tying Label.----End8.10 Installing a CPRI Fiber Optic CableThis section describes the procedure for installing a CPRI fiber optic cable.PrerequisiteBefore the installation, single-mode optical modules can be distinguished from multi-modeoptical modules in either of the following ways:lSM and MM labels on an optical module: SM indicates a single-mode optical module, andMM indicates a multi-mode optical module.lColor of the puller on an optical module: Blue indicates a single-mode optical module, andblack or gray indicates a multi-mode optical module.CAUTIONThe optical modules to be installed must match CPRI rates.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.78
ContextA 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 theCPRI fiber optic cable in the BBU3900 Hardware Description.ProcedureStep 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on theRRU and the other optical module into the CPRI port on the BBU, and then raise the pullers, asshown in Figure 8-18.Figure 8-18 Installing an optical moduleCAUTIONThe performance of an optical module that is exposed to the air for more than 20 minutes maybe abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical modulewithin 20 minutes.Step 2 Connect the end labeled 1A and 1B of the fiber optic cable to the optical module on the RRUside, as shown in Figure 8-19.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.79
Figure 8-19 Installing a CPRI fiber optic cableCAUTIONInstall 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 BBUside.Step 4 Lay out the fiber optic cable by referring to 8.1 Cabling Requirements, and then bind the cableusing cable ties.Step 5 Label the fiber optic cable by referring to Attaching an L-Shaped Label.----End8.11 Installing an RRU Alarm CableThis section describes the procedure for installing an RRU alarm cable.ProcedureStep 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 inFigure 8-20.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.80
Figure 8-20 Installing an RRU alarm cable Step 2 Lay out the cable by referring to 8.1 Cabling Requirements, and then bind the cable using cableties.Step 3 Label the installed cable by referring to Attaching an L-Shaped Label.----End8.12 Closing the Cover Plate of an RRU Cabling CavityThis section describes the procedure for closing the cover plate of an RRU cabling cavity.ProcedureStep 1 Close clips and tighten the screws on each clip to 1.4 N·m (12.39 lbf·in.) using a torquescrewdriver, as shown in Figure 8-21.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.81
Figure 8-21 Closing clips CAUTIONEnsure 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 Figure8-22.Figure 8-22 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 0.8N·m (7.08 lbf·in.) using a torque screwdriver, as shown in Figure 8-23.RRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.82
Figure 8-23 Closing the cover plate of the RRU cabling cavity(1) Protection screw CAUTIONlBefore tightening the screws on the cover plate, ensure that cables and waterproof blocks areproperly inserted into troughs.lTighten 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.----EndRRU3841Installation Guide 8 Installing RRU CablesIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.83
9 Checking the RRU Hardware InstallationAfter an RRU is installed, check the hardware installation.Table 9-1 provides the checklist for the RRU hardware installation.Table 9-1 Checklist for the RRU hardware installationSN Item1The position for each device conforms to the engineering drawing and meets thespace 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 cablingcavity, 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 solderedor crimped.7 None of power cables and PGND cables can be short-circuited or reverselyconnected. 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 thebuilding share one group of ground conductors.10 The connectors of each signal cable are intact and securely linked, and these cablesare not damaged or broken.11 Labels are correct, legible, and complete at both ends of each cable, feeder, andjumper.RRU3841Installation Guide 9 Checking the RRU Hardware InstallationIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.84
10 Powering On an RRUAfter all the devices are installed, check the power-on status of an RRU.CAUTIONAfter you unpack an RRU, you must power on it within 24 hours. If you power off the RRU formaintenance, you must restore power to the RRU within 24 hours.Figure 10-1 shows the RRU power-on check process.Figure 10-1 RRU power-on check processRRU3841Installation Guide 10 Powering On an RRUIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.85
11 AppendixAbout This ChapterThis section describes the procedure for adding an easy power receptacle (pressfit type)connector.11.1 Adding an Tool-less Female Connector (Pressfit Type) to the RRU Power Cable on theRRU SideThis section describes the procedure for adding an tool-less female connector (pressfit type) tothe RRU power cable on the RRU side.RRU3841Installation Guide 11 AppendixIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.86
11.1 Adding an Tool-less Female Connector (Pressfit Type)to the RRU Power Cable on the RRU SideThis section describes the procedure for adding an tool-less female connector (pressfit type) tothe RRU power cable on the RRU side.ProcedureStep 1 Figure 11-1 shows the cable diagram on labels.Figure 11-1 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 shownin Figure 11-2.Figure 11-2 Determining the length of the power cable Step 3 Strip the specified length of the sheath off the power cable, as shown in Figure 11-3.RRU3841Installation Guide 11 AppendixIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.87
Figure 11-3 Stripping the specified length of sheath Step 4 Strip a specified length of sheath off each core wire. The length must be consistent with thelength of the notch in the tool-less female connector (pressfit type), as shown in Figure 11-4.Figure 11-4 Stripping the sheath off each core wire Figure 11-5 Matched length Step 5 Add an tool-less female connector (pressfit type) to two core wires.1. Tighten the screws using a Phillips screwdriver, as shown in Figure 11-6.RRU3841Installation Guide 11 AppendixIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.88
Figure 11-6 Tightening screws 2. Connect the blue core wire labeled NEG(-) to the - port and the black/brown core wirelabeled RTN(+) to the + port on the tool-less female connector (pressfit type), and thentighten the screws using a Phillips screwdriver, as shown in Figure 11-7.Figure 11-7 Adding an tool-less female connector (pressfit type) to two core wires Step 6 Strip the specified length of the sheath off the power cable to expose the intact shield layer, asshown in Figure 11-8.Figure 11-8 Stripping the sheath off the power cable RRU3841Installation Guide 11 AppendixIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.89
CAUTIONEach core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm(0.059 [in.]), as shown in Figure 11-9.Figure 11-9 Inserting core wires into the tool-less female connector (pressfit type) ----EndRRU3841Installation Guide 11 AppendixIssue Draft A (2012-01-10) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.90

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