Huawei Technologies RRU3256-2500 Remote Radio Unit User Manual RRU3252 RRU3256 Installation Guide

Huawei Technologies Co.,Ltd Remote Radio Unit RRU3252 RRU3256 Installation Guide

RRU3256 Installation Guide-EN

DBS3900V100R005C00RRU3252/RRU3256 InstallationGuideIssue Draft ADate 2012-11-30HUAWEI 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 a 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 (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.i
About This DocumentPurposeThis document describes the process of installing a DC RRU3252/RRU3256 (referred to as RRUin this document).Product VersionThe following table lists the product version related to this document.Product Name Product VersionDBS3900 LTE TDD V100R005C00 and later versions Intended AudienceThis document is intended for:Base station installation engineersOrganization1 Change HistoryThis chapter describes changes in the RRU3252/RRU3256 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 that installation engineers must 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 EquipmentThis chapter describes how to unpack and check the delivered equipment to ensure that all thematerials are included and intact.DBS3900RRU3252/RRU3256 Installation Guide About This DocumentIssue Draft A (2012-11-30) 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 the RRU and Cables onto a TowerThis section describes how to hoist the RRU and Cables onto a tower and provides importantnotes about the installation.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 as required.8 Installing RRU CablesThis chapter describes the procedure for installing RRU cables.9 Checking the RRU Hardware InstallationThis section describes how to check RRU hardware installation after the installation is complete.10 Powering On an RRUThis section describes how to check the power-on status of an RRU after all the devices areinstalled.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. DBS3900RRU3252/RRU3256 Installation Guide About This DocumentIssue Draft A (2012-11-30) 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. DBS3900RRU3252/RRU3256 Installation Guide About This DocumentIssue Draft A (2012-11-30) 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.DBS3900RRU3252/RRU3256 Installation Guide About This DocumentIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.v
ContentsAbout This Document.....................................................................................................................ii1 Change History..............................................................................................................................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...........................................................................................................................................................73.3 RRU Indicators...................................................................................................................................................83.4 Installation Options...........................................................................................................................................103.5 Installation Clearance Requirements of an RRU..............................................................................................153.5.1 Clearance for a Single RRU....................................................................................................................153.5.2 Clearance for Multiple RRUs..................................................................................................................173.5.3 Spacing Between RRUs...........................................................................................................................204 Unpacking the Equipment.........................................................................................................235 Installation Process.....................................................................................................................256 Hoisting the RRU and Cables onto a Tower..........................................................................266.1 Hoisting an RRU onto a Tower........................................................................................................................276.2 Hoisting Fiber Optic Cables onto a Tower.......................................................................................................316.3 Hoisting Power Cables onto a Tower...............................................................................................................337 Installing the RRU.......................................................................................................................377.1 Mounting Kits for an RRU...............................................................................................................................387.2 Installing the RRU on a Pole............................................................................................................................387.2.1 Installing a Single RRU...........................................................................................................................437.2.2 Installing Two RRUs...............................................................................................................................467.2.3 Installing Multiple RRUs.........................................................................................................................487.3 Installing the RRU on U-Steel..........................................................................................................................537.4 Installing the RRU on Angle Steel...................................................................................................................577.5 Installing the RRU on a Wall...........................................................................................................................60DBS3900RRU3252/RRU3256 Installation Guide ContentsIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vi
8 Installing RRU Cables................................................................................................................658.1 Cabling Requirements......................................................................................................................................678.2 Cable Connections............................................................................................................................................728.3 Installation Process...........................................................................................................................................758.4 RRU Cable List................................................................................................................................................768.5 Installing an RRU PGND Cable.......................................................................................................................788.6 Installing an RRU RF Jumper..........................................................................................................................798.7 Installing an RRU Alarm Cable........................................................................................................................828.8 Installing an RRU AISG Multi-Wire Cable and an RRU AISG Extension Cable...........................................838.9 Opening the Cover Plate of an RRU Cabling Cavity.......................................................................................868.10 Installing an RRU Power Cable......................................................................................................................888.11 Installing an Optical Fiber Cable ...................................................................................................................898.12 Closing the Cover Plate of an RRU Cabling Cavity......................................................................................919 Checking the RRU Hardware Installation..............................................................................9410 Powering On an RRU...............................................................................................................9511 Appendix.....................................................................................................................................9711.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable...............................98DBS3900RRU3252/RRU3256 Installation Guide ContentsIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vii
1 Change HistoryThis chapter describes changes in the RRU3252/RRU3256 Installation Guide.Draft A (2012-11-30)This is a draft.DBS3900RRU3252/RRU3256 Installation Guide 1 Change HistoryIssue Draft A (2012-11-30) 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 that installation engineers must 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.DBS3900RRU3252/RRU3256 Installation Guide 2 Installation PreparationsIssue Draft A (2012-11-30) 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:lRRU3252/RRU3256 Hardware DescriptionlDBS3900 Installation GuidelOCB-01M User GuideThis document describes the RRU installation on a pole, U-steel, angle steel, or wall. If RRUsare installed on the IFS06, the following reference document is required:lDBS3900 (ICR) Installation Guide2.2 Tools and InstrumentsAll tools and instruments required for RRU installation must be ready before the installation.Hammer drill (φ 12 bit to φ14 bit)Electrostatic discharge(ESD) glovesVacuum cleanerHeat gun Phillips screwdriver (M3 toM6)Flat-head screwdriver (M3 toM6)Rubber mallet Hydraulic pliers Wire stripperUtility knife Cable cutter LevelDBS3900RRU3252/RRU3256 Installation Guide 2 Installation PreparationsIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.3
Adjustable wrench (capacity≥ 32 mm)Torque wrenchCapacity: 17 mm, 21 mm,and 32 mmCombination wrenchCapacity: 17 mm, 21 mm,and 32 mmTorque screwdriver5 mm(M3 to M6)(M3 to M6)Torque socketMultimeter Marker (diameter ≤ 10 mm) 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.DBS3900RRU3252/RRU3256 Installation Guide 2 Installation PreparationsIssue Draft A (2012-11-30) 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 ports on the RRU panels. An RRU has a bottom panel, cabling cavitypanel, 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.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) 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 DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.6
3.2 RRU PortsThis section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavitypanel, and indicator panel.Figure 3-3 shows the ports on the RRU panels.Figure 3-3 Ports on the RRU panels Table 3-1 describes ports and indicators on the RRU panels.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.7
Table 3-1 Ports and indicators on the RRU panelsItem Label Description(1) Ports at the bottom ANT0-ANT3 TX/RX ports. ANT0 port supports RET signaltransmission.RET/EXT_ALM Communication port for the RET antenna orport for alarm reporting, supporting RETsignal transmissionRGPS RGPS port, which is optional.(2) Ports in the cablingcavityCPRI0/IR0 Optical portCPRI1/IR1RTN(+) Power supply socketNEG(-)(3) Indicators RUN For details, see 3.3 RRU Indicators.ALMACTVSWRCPRI0/IR0CPRI1/IR1 NOTEIf only two RF ports are required, ANT0 and ANT1 are used by default.The RET ports to be used are determined by the software configuration.3.3 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status.For the specific positions of RRU indicators, see 3.2 RRU Ports.Table 3-2 describes RRU indicators.Table 3-2 Indicators on the RRULabel Color Status DescriptionRUN Green Steady on There is power supply, but the moduleis faulty.Steady off There is no power supply, or themodule is faulty.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.8
Label Color Status DescriptionBlinking on for 1s and offfor 1sThe module is working properly.Blinking on for 0.125s andoff for 0.125sSoftware is being loaded to themodule, or the module is not started.ALM Red Steady on Alarms are generated, and the modulemust be replaced.Steady off No alarm is generated.Blinking on for 1s and offfor 1sAlarms are generated. The alarmsmay be caused by the faults on therelated modules or ports. Therefore,the necessity for module replacementis uncertain.ACT Green Steady on The module is working properly withTX channels enabled or software isbeing loaded without RRU running.Blinking on for 1s and offfor 1sThe module is working properly withTX channels disabled.VSWR Red Steady off No VSWR alarm is generated.Steady on A VSWR alarm is generated.CPRI0/IR0Red orgreenSteady green The CPRI link is functioningproperly.Steady red An optical module fails to transmit orreceive signals possibly because theoptical module is faulty or the opticalfiber cable is broken.Blinking red on for 1s andoff for 1sThe CPRI link is out of lock possiblybecause of mutual lock of dual-modeclock sources or mismatched datarates over CPRI ports. (You areadvised to check the systemconfiguration to rectify the fault.)Steady off The SFP module is not properlyinstalled, or the optical module ispowered off.CPRI1/IR1Red orgreenSteady green The CPRI link is functioningproperly.Steady red An optical module fails to transmit orreceive signals possibly because theoptical module is faulty or the opticalfiber cable is broken.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.9
Label Color Status DescriptionBlinking red on for 1s andoff for 1sThe CPRI link is out of lock possiblybecause of mutual lock of dual-modeclock sources or mismatched datarates over CPRI ports. (You areadvised to check the systemconfiguration to rectify the fault.)Steady off The SFP module is not properlyinstalled, or the optical module ispowered 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 a metal 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 to 114 mm (2.36 in. to 4.49in.). The recommended diameter is 80 mm (3.15 in.).lIf the diameter of a pole ranges from 60 mm to 76 mm (2.36 in. to 2.99 in.), a maximum ofthree RRUs can be installed on the pole and the side-mounted installation must not beadopted.lIf three or more RRUs must be installed on a pole in centralized mode, the diameter of thepole must range from 76 mm to 114 mm (2.99 in. to 4.49 in.).lThe recommended pole thickness is 3.5 mm (0.14 in.) or thicker.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.10
Figure 3-5 shows an RRU installed on a pole.Figure 3-5 RRU installed on a pole Installing an RRU on U-steelCAUTIONlYou are advised to install only one RRU on the same U-steel or angle steel.lThe angle between the vertical plane and the pole, angle steel, or U-steel must be smallerthan or equal to 10°, as shown in Figure 3-6.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.11
Figure 3-6 Requirement of the angle between the ground and the pole, angle steel, or U-steel(1) RRU (2) Pole, angle steel, or U-steel Figure 3-7 shows U-steel specifications.Figure 3-7 U-steel specifications Figure 3-8 shows an RRU installed on U-steel.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.12
Figure 3-8 RRU installed on U-steel Installing an RRU on Angle SteelFigure 3-9 shows angle steel specifications.Figure 3-9 Angle steel specifications CAUTIONlIt is recommended that only one RRU be installed on one angle steel.lThe vertical deviation angle of angle steel must be less than or equal to 10°, as shown inFigure 3-6.Figure 3-10 shows an RRU installed on angle steel.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.13
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 with a torque of 30 N·m (265.52 lbf·in.) to ensure thebolts work properly and the wall remains intact without cracks in it.CAUTIONThe brackets must not be combined when RRUs are installed on a wall.Figure 3-11 shows an RRU installed on a wall.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.14
Figure 3-11 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.NOTEThe recommended installation clearance ensures normal running and provides an appropriate space forOM. If there is sufficient space, leave the recommended installation clearance.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 Clearance for a Single RRUThis section describes the recommended and minimum clearance for a single RRU.Recommended Clearance for a Single RRUFigure 3-12 shows the recommended clearance for a single RRU.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.15
Figure 3-12 Recommended clearance for a single RRU Minimum Clearance for a Single RRUFigure 3-13 shows the minimum clearance for a single RRU.Figure 3-13 Minimum clearance for a single RRU DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.16
Minimum Clearance for a Single RRU Installed on a TowerFigure 3-14 shows the minimum clearance for a single RRU installed on a tower.Figure 3-14 Minimum clearance for a single RRU installed on a tower 3.5.2 Clearance for Multiple RRUsThis section describes the recommended and minimum clearance for multiple RRUs.Recommended Clearance for Multiple RRUs Installed in Centralized ModeFigure 3-15 shows the recommended clearance for multiple RRUs installed in centralized mode.DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.17
Figure 3-15 Recommended clearance for multiple RRUs installed in centralized mode Minimum Clearance for Multiple RRUs Installed in Centralized ModeFigure 3-16 shows the minimum clearance for multiple RRUs installed in centralized mode.Figure 3-16 Minimum clearance for multiple RRUs installed in centralized mode DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.18
Recommended clearance for multiple RRUs installed on a wall in standard modeFigure 3-17 shows the recommended clearance for multiple RRUs installed on a wall in standardmode.Figure 3-17 Recommended clearance for multiple RRUs installed on a wall in standard mode Minimum clearance for multiple RRUs installed on a wall in standard modeFigure 3-18 shows the minimum clearance for multiple RRUs installed on a wall in standardmode.Figure 3-18 Minimum clearance for multiple RRUs installed on a wall in standard modeDBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.19
Recommended Clearance for Multiple RRUs Side-Mounted on a WallFigure 3-19 shows the recommended clearance for multiple RRUs side-mounted on a wall.Figure 3-19 Recommended clearance for multiple RRUs side-mounted on a wall 3.5.3 Spacing Between RRUsThis section describes the horizontal and vertical installation spacing between RRUs.Recommended horizontal spacing between RRUsFigure 3-20 shows the recommended horizontal spacing between RRUs.Figure 3-20 Recommended horizontal spacing between RRUs DBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.20
Minimum horizontal spacing between RRUsFigure 3-21 shows the minimum horizontal spacing between RRUs.Figure 3-21 Minimum horizontal spacing between RRUs Recommended vertical spacing between RRUsFigure 3-22 shows the recommended vertical spacing between RRUs.Figure 3-22 Recommended vertical spacing between RRUsDBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.21
Minimum vertical spacing between RRUsFigure 3-23 shows the minimum vertical spacing between RRUs.Figure 3-23 Minimum vertical spacing between RRUsDBS3900RRU3252/RRU3256 Installation Guide 3 Information About the InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.22
4 Unpacking the EquipmentThis chapter describes how to unpack and check the delivered equipment to ensure that all thematerials 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.DBS3900RRU3252/RRU3256 Installation Guide 4 Unpacking the EquipmentIssue Draft A (2012-11-30) 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 shockwatch label 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.Either shipment shortage, wrong shipmentor damaged articles.Report to the local Huawei office.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.----EndDBS3900RRU3252/RRU3256 Installation Guide 4 Unpacking the EquipmentIssue Draft A (2012-11-30) 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 RRUDBS3900RRU3252/RRU3256 Installation Guide 5 Installation ProcessIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.25
6 Hoisting the RRU and Cables onto a TowerAbout This ChapterThis section describes how to hoist the RRU and Cables onto a tower and provides importantnotes about the installation.6.1 Hoisting an RRU onto a TowerThis section describes the procedures and precautions for hoisting an RRU and its mounting kitsonto a tower. In tower-mounted scenario, the RRU can be installed on a pole, U-steel, or anglesteel.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.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.26
6.1 Hoisting an RRU onto a TowerThis section describes the procedures and precautions for hoisting an RRU and its mounting kitsonto a tower. In tower-mounted scenario, the RRU can be installed on a pole, U-steel, or anglesteel.PrerequisitesPlace 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 on atower with its side mounted, and the brackets for more than two RRUs cannot be combined.ProcedureStep 1 Hoist the RRU and mounting kits onto the tower respectively, as shown in Figure 6-1.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.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.27
Figure 6-1 Hoisting the RRU onto the tower(1) Lifting sling (2) Fixed pulley (3) Traction sling 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 mounting kits properly using a lifting sling, as shownin Figure 6-2, and binds the RRU using a lifting sling and a traction sling, as shown inFigure 6-3.Figure 6-2 Binding mounting kits for the RRUDBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.28
Figure 6-3 Binding the RRU(1) Lifting sling (2) Lifting eye (3) Traction sling (4) Handle CAUTIONlThe load-bearing capacity of each sling must be greater than 200 kg (441 lb) and thediameter of each sling must be less than 25 mm (0.98 in.). The angle at the top of thelifting sling [by the knot] must not be greater than 60 degrees.lWhen hoisting the RRU and mounting kits onto the tower, protect them from collidingwith the 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 6-4 andFigure 6-5.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.29
Figure 6-4 Incorrect binding method Figure 6-5 Incorrect binding method 3. Installation engineer B pulls the lifting sling downwards, and installation engineer C pullsthe traction sling outwards to protect the RRU from colliding with the tower.Step 2 Installation engineer A catches the RRU, install the RRU on the main bracket until the RRUsnaps shut.Step 3 Remove the lifting sling and traction sling.NOTEThe procedure for hoisting the RRU and mounting kits onto the tower is for your reference only.----EndDBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.30
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.ContextCabling requirements for power cables are met. For details, see Cabling Requirements.ProcedureStep 1 Hoist the fiber optic cables onto the tower, as shown in Figure 6-6.Figure 6-6 Hoisting fiber optic cables onto the tower(1) Lifting sling (2) Fixed pulley (3) Traction slingCAUTIONBefore 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.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.31
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 B places the fiber coiler for coiling fiber optic cables on the fiberspools, and installation engineer D lead the lifting sling through the stretch sling of the fiberoptic cables and use the other sling as a traction sling to secure the cables 4 m (13.12 ft)away from the lifting sling, as shown in Figure 6-7.Figure 6-7 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 onesling, as shown in Figure 6-8.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.32
Figure 6-8 Incorrect binding method 3. Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m (49.21ft) 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 2 Secure the fiber optic cables to the tower vertically using cable clips.Step 3 Remove the lifting sling, traction sling, and protection pipe.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 Cabling Requirements.The procedure for adding a connector to the RRU power cable on the RRU side is done underthe tower.ProcedureStep 1 Hoist the power cables onto the tower, as shown in Figure 6-9.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.33
Figure 6-9 Hoisting power cables onto the tower(1) Lifting sling (2) 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 B secures three cable ties to the power cable connector, and thensecures the power cable to the lifting sling, as shown in Figure 6-10.NOTEThe connector on the power cable in the figure is only an example. The actual connector may varyaccording to the situation.DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.34
Figure 6-10 Binding cable ties 3. Installation engineer B wraps the power cable connector with a layer of PVC insulationtape, as shown in Figure 6-11.NOTEWrap the PVC insulation tape from 30 mm (1.18 in.) away from one end of the connector until itreaches the other end of the connector. The total length of the wrapped connector is 100 mm (3.94in.).DBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.35
Figure 6-11 Wrapping the PVC insulation tape 4. Installation engineer C pulls the lifting sling downwards, and installation engineer B pullsthe other end of the lifting sling outwards to protect the power cables from colliding withthe tower.Step 2 Secure the power cables to the tower vertically using cable clips.Step 3 Remove the cable ties, PVC insulation tape, and lifting sling.NOTEThe procedure for hoisting the power cables onto the tower is for your reference only.----EndDBS3900RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a TowerIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.36
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 as required.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 PoleThis section illustrates the installation of one or more RRUs 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.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.37
7.1 Mounting Kits for an RRUThis section describes the bracket assembly and the attachment plate for an RRU.Figure 7-1 shows the bracket assembly for an RRU.Figure 7-1 Bracket assembly for an RRU(1) Plastic screw cap (2) M10 nut (3) Spring washer (4) Flat washer(5) M10x150 bolt (6) Auxiliary mountingbracket(7) Hoist clamp on the mainmounting bracket(8) Main mounting bracket Figure 7-2 shows the rear view of an RRU.Figure 7-2 Rear view of an RRU(1) Attachment plate 7.2 Installing the RRU on a PoleThis section illustrates the installation of one or more RRUs on a pole.Figure 7-3 shows a single RRU installed on a pole.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.38
Figure 7-3 Single RRU installed on a pole Figure 7-4 shows two RRUs installed on a pole.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.39
Figure 7-4 Two RRUs installed on a pole NOTEIf two RRUs are installed on a pole, the minimum distance between the two sets of mounting kits is theheight of an RRU.Figure 7-5, Figure 7-6, and Figure 7-7 show multiple RRUs installed on a pole.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.40
Figure 7-5 Three RRUs installed on a pole in centralized mode DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.41
Figure 7-6 Four RRUs installed on a pole in centralized mode DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.42
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.PrerequisitesBefore 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 Clearance for a Single RRU to determinea position.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.43
lIf the RRU must be installed on the ground, see Figure 7-8 to determine a position.Figure 7-8 Distance between the main mounting bracket and the ground Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally removeone end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and thendisassemble the mounting kits, as shown in Figure 7-9.Figure 7-9 Removing the M10x150 bolt from the U notch Step 3 Install the bracket assembly on a pole. Then, place the removed end of the bolt into the U notch,as shown in Figure 7-10.Figure 7-10 Bracket assembly installed on a poleDBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.44
Step 4 To secure the bracket assembly to the pole, use a torque wrench with an aperture of 16 mm (0.67in.) to tighten the two M10 nuts with a torque of 40 N·m (354.03 lbf·in.), as shown in Figure7-11.Figure 7-11 Securing the bracket assembly (1) Plastic screw capNOTEDo not remove the plastic screw caps from the bolts on the mounting kits.Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure7-12.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.45
Figure 7-12 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.ProcedureStep 1 Install the first RRU, as shown in Figure 7-13. For details, see 7.2.1 Installing a Single RRU.Figure 7-13 Installing the first RRU DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.46
Step 2 Install the second set of mounting kits, The distance between the two sets of mounting kits mustequal the height of an RRU.Step 3 Remove the attachment plate from the rear of the second RRU and then install it on the RRUfront, as shown in Figure 7-14.Figure 7-14 Removing the attachment plate from the rear of the second RRU and then installingit on the RRU front 1. Remove the attachment plate from the RRU rear using an inner hexagon screwdriver.2. Install the attachment plate to the RRU front, and tighten the stainless steel screws on theattachment plate with a torque of 4.8 N·m (44.25 lbf·in.) using a torque screwdriver.Step 4 Install the second RRU on the main mounting bracket, as shown in .NOTEWhen you install two RRUs in back-to-back mode, ensure that the cabling cavities of these two RRUs facethe same direction.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.47
Figure 7-15 Installing the second RRU on the main mounting bracket(1) RRU installed in standard mode (2) RRU installed in reverse mode (3) Cabling cavity ----End7.2.3 Installing Multiple RRUsThis section describes the procedure for installing multiple remote radio units (RRUs) on a poleand the precautions that must be taken during the installation.ContextThree, four, or six RRUs can be installed on a pole. The procedures for installing them are thesame. Following is the procedure for installing four RRUs on a pole.ProcedureStep 1 Install the first set of mounting kits on a pole. For details, see 7.2.1 Installing a Single RRU.Step 2 Remove an attachment plate from the RRU rear, and install it on one side of the RRU, as shownin Figure 7-16. (Repeat this step to change the positions of all the other attachment plates of theRRU.)DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.48
Figure 7-16 Removing an attachment plate from the RRU rear and installing it on one side ofthe RRU 1. Use an inner hexagon screwdriver to remove the attachment plate from the RRU rear.2. Install the attachment plate on one side of the RRU, and use a torque screwdriver to tightenthe stainless steel screws on the attachment plate with a torque of 5 N·m (44.25 lbf·in.).Step 3 Install the first RRU on the main mounting bracket in the first set of mounting kits, as shown inFigure 7-17.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.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.49
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.Figure 7-19 Installing the second RRU on the main mounting bracket Step 6 Install the third main mounting bracket and the third RRU, as shown in Figure 7-20.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.50
Figure 7-20 Installing the third RRU on the main mounting bracket Step 7 Install the second set of mounting kits, as shown in Figure 7-21. The minimum distance betweenthe two sets of mounting kits is the height of an RRU.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.51
Figure 7-21 Installing the second set of mounting kits Step 8 Install the fourth RRU on the main mounting bracket of the second set of mounting kits, as shownin Figure 7-22.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.52
Figure 7-22 Installing the fourth RRU on the 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.PrerequisitesBefore 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 7-23 shows the top view of the RRU installed on angle steel.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.53
Figure 7-23 Top view of the RRU(1) U-steel NOTEIf the length of the narrow side of U-steel is less than 40 mm (1.57 in.), install an RRU in mode a or modeb shown in Figure 7-23.ProcedureStep 1 Determine a position for installing the main mounting bracket.lIf the RRU is to be installed on a tower, determine the position for installing the mainmounting bracket by referring to 3.5.1 Clearance for a Single RRU.lIf the RRU is to be installed on the ground, determine the position for installing the mainmounting bracket by referring to Figure 7-24.Figure 7-24 Distance between the main mounting bracket and the ground DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.54
NOTEIt is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.)above the ground.Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally removeone end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and thendisassemble the mounting kits, as shown in Figure 7-25.Figure 7-25 Removing the M10x150 bolt from the U notch Step 3 Install the bracket assembly on U-steel. Then, place the removed end of the bolt into the U notch,as shown in Figure 7-26.Figure 7-26 Bracket assembly installed on U-steel Step 4 To secure the bracket assembly to the U-steel, use a torque wrench with an aperture of 16 mm(0.67 in.) to tighten the two M10 nuts with a torque of 40 N·m (354.03 lbf·in.), as shown inFigure 7-27.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.55
Figure 7-27 Securing the bracket assembly (1) Plastic screw capStep 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure7-28.Figure 7-28 Installing the RRU on the main mounting bracketDBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.56
----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.PrerequisitesBefore 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 7-29 shows the top view of the RRU installed on angle steel.Figure 7-29 Top view of the RRU(1) Angle steel ProcedureStep 1 Determine a position for installing the main mounting bracket.lIf the RRU is to be installed on a tower, determine the position for installing the mainmounting bracket by referring to 3.5.1 Clearance for a Single RRU.lIf the RRU is to be installed on the ground, determine the position for installing the mainmounting bracket by referring to Figure 7-30.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.57
Figure 7-30 Distance between the main mounting bracket and the ground NOTEIt is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.)above the ground.Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally removeone end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and thendisassemble the mounting kits, as shown in Figure 7-31.Figure 7-31 Removing the M10x150 bolt from the U notch Step 3 Install the bracket assembly on angle steel. Then, place the removed end of the bolt into the Unotch, as shown in Figure 7-32.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.58
Figure 7-32 Bracket assembly installed on angle steel Step 4 To secure the bracket assembly to the angle steel, use a torque wrench with an aperture of 16mm (0.67 in.) to tighten the two M10 nuts with a torque of 40 N·m (354.03 lbf·in.), as shown inFigure 7-33.Figure 7-33 Securing the bracket assembly (1) Plastic screw capStep 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure7-34.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.59
Figure 7-34 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.PrerequisitesThe 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 with a torque of 15 N·m (265.52 lbf·in.) to ensure thebolts work properly and the wall remains intact without cracks in it.ProcedureStep 1 Remove the plastic screw caps, M10 nuts, spring washers, flat washers, auxiliary brackets, andM10x150 bolts in sequence. Then, use the main mounting bracket to secure the RRU to a wall.Step 2 Place the main mounting bracket against the installation position, use a level to verify that themain mounting bracket is placed horizontally, and then mark anchor points with a marker, asshown in Figure 7-35.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.60
Figure 7-35 Marking the anchor points(1) Main mounting bracket (2) RRU NOTEIt is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above theground.Figure 7-36 Expansion bolt assembly(1) M8x85 bolt (2) Spring washer 8 (3) Plastic tube (4) Flat washer 8 (5) Expansion tube Step 3 Drill holes at the anchor points, and then install expansion bolt assemblies, as shown in Figure7-37.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.61
Figure 7-37 Drilling a hole and installing an expansion bolt assembly 1. Use a hammer drill with a φ12 bit to drill holes vertically at the marked anchor points.Ensure that the depth of each hole ranges from 55 mm to 60 mm (2.17 in. to 2.36 in.).WARNINGTake proper safety measures to protect your eyes and respiratory tract against the dustbefore drilling holes.2. Vertically insert the M8x85 expansion bolts into the mounting holes and use a rubber malletto knock them until they are buried in the holes.3. Partially tighten the expansion bolts clockwise.4. Loosen the expansion bolts counterclockwise and then remove the M8x85 expansion bolts,spring washers, plastic tubes, and flat washers in sequence.NOTEAfter completely removing an expansion bolt, store the plastic tube properly.Step 4 Use the two removed M8x85 expansion bolts to secure the main mounting brackets to the wall.Then, use a torque socket to tighten the nuts of the expansion bolts with a torque of 15 N·m(265.52 lbf·in.), as shown in Figure 7-38.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.62
Figure 7-38 Securing the main mounting bracket to a wall (1) M8x85 expansion bolts (2) Spring washers (3) Flat washersStep 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure7-39.DBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.63
Figure 7-39 Installing the RRU ----EndDBS3900RRU3252/RRU3256 Installation Guide 7 Installing the RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.64
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 Alarm CableThis section describes the procedure for installing an RRU alarm cable.8.8 Installing an RRU AISG Multi-Wire Cable and an RRU AISG Extension CableThis section describes the procedures for installing an RRU AISG multi-wire cable and an RRUAISG extension cable.8.9 Opening the Cover Plate of an RRU Cabling CavityThis section describes the procedure for opening the cover plate of an RRU cabling cavity.8.10 Installing an RRU Power CableThis section describes the procedure for installing an RRU power cable.8.11 Installing an Optical Fiber CableThis section describes the procedure for installing an optical fiber cable.8.12 Closing the Cover Plate of an RRU Cabling CavityDBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.65
This section describes the procedure for closing the cover plate of an RRU cabling cavity.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.66
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, ordinary 1/2'' jumper, super-flexible 1/2'' jumper,and RG-8U jumper must be more than 35 mm (1.38 in.), 127 mm (5 in.), 50 mm (1.97 in.),and 50 mm (1.97 in.), respectively.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.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.67
lDrip loops must be made outside the feeder window, and the requirements for the minimumbending radius are met.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.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.68
Figure 8-1 Securing cables on the cable tray Secure cables on the tower, as shown in Figure 8-2.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.69
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.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.70
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.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.71
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.For the cable connection between an RRU and an RGPS antenna (optional), refer to the document deliveredwith the RGPS antenna. For the cable connection between an RRU and an AUF (optional), refer to thedocument delivered with the AUF.Figure 8-3 shows the cable connections adopted for a single RRU when the alarm monitoringfunction is provided.Figure 8-3 Cable connections for a single RRU (1)(1) PGND cable (2) RRU RF jumper (3) RRU alarm cable(4) CPRI optical fiber cable (5) RRU power cable (6) RGPS signal cable Figure 8-4 shows the cable connections adopted for a single RRU when the remote electricaltilt (RET) function is provided.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.72
Figure 8-4 Cable connections for a single RRU (2)(1) PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable(4) RRU AISG extension cable (5) CPRI optical fiber cable (6) RRU power cable(7) RGPS signal cable Figure 8-5 shows the cable connections adopted for multiple RRUs when the alarm monitoringfunction is provided.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.73
Figure 8-5 Cable connections for multiple RRUs (1)(1) PGND cable (2) RRU RF jumper (3) RRU alarm cable(4) CPRI optical fiber cable or SFP high-speed cable forcascading RRUs(5) RRU power cable (6) RGPS signal cable NOTEIf you must cascade two or more RRUs in the same cell, for example, to expand the capacity, install thealarm cable to the RRU at the last level.Figure 8-6 shows the cable connections adopted for multiple RRUs when the remote electricaltilt (RET) function is provided.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.74
Figure 8-6 Cable connections for multiple RRUs (2)(1) PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable(4) RRU AISG extension cable (5) CPRI optical fiber cable or SFP high-speed cable for cascading RRUs(6) RRU power cable(7) RGPS signal cable 8.3 Installation ProcessThis section describes the process of installing RRU cables.Figure 8-7 shows the process of installing RRU cables.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.75
Figure 8-7 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 Connectedto...Connector Connected to...RRU PGNDCableOT terminal(M6)Groundterminal on theRRUOT terminal(M8)Ground terminalon the ground barRRU PowerCableTool-lessfemaleconnector(pressfit type)NEG(-) andRTN(+) portson the RRUTool-less femaleconnector(pressfit type)One of RRU0 toRRU5 ports onthe EPSDBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.76
Cable One End The Other EndConnector Connectedto...Connector Connected to...OT terminal(M4)One of LOAD0to LOAD5 portson the DCDUOne of LOAD4to LOAD9 portson the PDUCPRI FiberOptic CableDLC connector CPRI0/IR0 porton the RRUDLC connector CPRI port on theLBBP in theBBUCPRI1/IR1 porton the RRUCPRI0/IR0 porton the RRURRU RFJumperType NconnectorANT0 to ANT3ports on theRRUType NconnectorAntenna systemRGPS Jumper(optional)WaterproofedDB15connectorRemote GlobalPositioningSystem (RGPS)port at the RRUbottomRound 12-pinconnectorRGPS antennaSFP High-Speed Cable forCascaded RRUs(optional)SFP20 maleconnectorCPRI1 port onthe RRUSFP20 maleconnectorCPRI0 port onthe RRURRU AlarmCable (optional)WaterproofedDB9 maleconnectorRET/EXT_ALMport on theRRUCord endterminalExternal alarmdeviceRRU AISGMulti-WireCable (optional)WaterproofedDB9 maleconnectorRET/EXT_ALMport on theRRUStandard AISGfemale connectorStandard AISGmale connectoron the remotecontrol unit(RCU) or on theAISG extensioncableRRU AISGExtensionCable (optional)Standard AISGmale connectorStandard AISGfemaleconnector onthe AISG multi-wire cableStandard AISGfemale connectorStandard AISGmale connectoron the RCU DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.77
8.5 Installing an RRU PGND CableThis section describes the procedure for installing an RRU PGND cable.ContextThe minimum cross-sectional area of an RRU PGND cable is 16 mm2 (0.025 in.2). The cablehas an M6 OT terminal at one end and an M8 terminal at the other end.ProcedureStep 1 Prepare an RRU PGND cable.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 Figure8-8.Figure 8-8 Installing an RRU PGND cable NOTECrimp OT terminals in correct directions, as shown in Figure 8-9.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.78
Figure 8-9 Correct direction of an OT terminal Step 3 Label the installed cable by referring to Attaching a Cable-Tying Label.----End8.6 Installing an RRU RF JumperThis section describes the procedure for installing an RRU RF jumper.ContextThe RF ports on the RRU must be connected using RF jumpers to the mapping ANT0 to ANT3ports on the antenna. Figure 8-10shows the mapping relationship between the RF ports and theantenna ports.Figure 8-10 The mapping relationship between the RF ports and the antenna portsNOTEThe port labels in this figure are examples and for reference only. DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.79
ProcedureStep 1 Connect the Type N connector at one end of the RRU RF jumper to the ANT port and use atorque wrench to tighten the connector with a torque of 1 N·m (12.39 lbf·in.), as shown in Figure8-11.Figure 8-11 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-resistant DC blocks must be installed between RRURF jumpers and the leaky cables to protect the RRUs against damage.Step 2 Connect the other end of the RF jumper to the external antenna system.Step 3 Waterproof the connectors of the RF jumper by referring to Figure 8-12.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.80
Figure 8-12 Waterproofing a connector of the RF jumper (1) PVC insulation tape (2) Waterproof tapeNOTElBefore wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice its originallength.lBefore wrapping the PVC insulation tape, do not stretch the PVC insulation tape.lEnsure that each layer of tape overlaps more than 50% of the preceding layer. Stretch and press the tapetightly to avoid wrinkles or spaces. Ensure that the tape is tightly wrapped and stuck and will not fall off.lEnsure that the adhesive surface of the tape overlaps the lower layer.lCable ties, cutting at the position of 3mm ~5mm far from head.1. Wrap each connector with one layer of insulation tape from bottom up.2. Wrap each connector with three layers of waterproof tape, first 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 connector tightly.3. Wrap each connector with three layers of PVC insulation tape, first 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 4 Retain the dustproof caps on vacant antenna connectors and waterproof the dustproof caps, asshown in Figure 8-13.CAUTIONDo not remove dustproof caps from vacant antenna connectors.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.81
Figure 8-13 Waterproofing a dustproof cap(1) Dustproof cap (2) PVC insulation tape (3) Waterproof tapeNOTElBefore wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice its originallength.lBefore wrapping the PVC insulation tape, do not stretch the PVC insulation tape.lEnsure that each layer of tape overlaps more than 50% of the preceding layer. Stretch and press the tapetightly to avoid wrinkles or spaces. Ensure that the tape is tightly wrapped and stuck and will not fall off.lEnsure that the adhesive surface of the tape overlaps the lower layer.lCable ties, cutting at the position of 3mm~5mm far from head. 1. Verify that dustproof caps are not removed.2. Wrap each dustproof cap with one layer of PVC insulation tape from bottom up.3. Wrap each dustproof cap with three layers of waterproof tape, first 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 cap tightly.4. Wrap each dustproof cap with three layers of PVC insulation tape, first from bottom up,then from top down, and finally from bottom up. Do not cut the tape until all the three layersof the tape are already wrapped. Wrap each layer of tape around the connector tightly.Step 5 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable.Step 6 Label the installed cable 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 Alarm CableThis section describes the procedure for installing an RRU alarm cable.ProcedureStep 1 Connect the DB9 connector at one end of the RRU alarm cable to the RET/EXT_ALM port onthe RRU, and connect the eight cord end terminals at the other end to the external alarm device,as shown in Figure 8-14.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.82
Figure 8-14 Installing an RRU alarm cable Step 2 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable.Step 3 Label the installed cable by referring to Attaching an L-Shaped Label.----End8.8 Installing an RRU AISG Multi-Wire Cable and an RRUAISG Extension CableThis section describes the procedures for installing an RRU AISG multi-wire cable and an RRUAISG extension 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.ProcedurelInstall an AISG multi-wire cable that is not configured with an AISG extension cable.1. Connect the waterproofed DB9 connector at one end of the AISG multi-wire cable tothe RET/EXT_ALM port on the bottom of the RRU, as shown in Figure 8-15.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.83
Figure 8-15 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. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind thecable.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. Connect the waterproofed DB9 connector at one end of the AISG multi-wire cable tothe RET/EXT_ALM port on the bottom of the RRU, and the other end of the cable tothe standard AISG male connector of the AISG extension cable, as shown in Figure8-16.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.84
Figure 8-16 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 8-17.Figure 8-17 Installing an RRU AISG multi-wire cable 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind thecable.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.85
4. Label the installed cable by referring to Attaching an L-Shaped Label.----End8.9 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 Use an M4 Phillips screwdriver to loosen the protection screw on the cover plate of the RRUcabling cavity, and pull the handle outwards to open the cover plate, as shown in Figure 8-18.Figure 8-18 Opening the cover plate of the RRU cabling cavity(1) Protection screw Figure 8-19 shows the RRU cabling cavity.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.86
Figure 8-19 RRU cabling cavity(1) Cover plate (2) Cable diagram on label (3) Cable trough for the optical fiber cable(4) Cable trough for the power cable (5) Waterproof block (6) Clip(7) Cabling cavity - - Step 3 Loosen the screws on the clips, and open the clips, as shown Figure 8-20.NOTEOpen the clips only for the cables to be installed.Figure 8-20 Opening clips ----EndDBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.87
8.10 Installing an RRU Power CableThis section describes the procedure for installing an RRU power cable.PrerequisitesA tool-less female connector (pressfit type) is added to the RRU power cable on the RRU side.For details, see 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRUPower Cable.ContextCAUTIONWhen installing the RRU power cable, connect the RRU power cable first to the RRU and thento the power device. Operations in the reverse sequence may cause damage to the componentsand injury of human bodies.ProcedurelInstall an RRU power cable that feeds power to an RRU from a DCDU when the DCDUis configured.1. Connect the tool-less female connector (pressfit type) at one end of the RRU powercable to the power supply socket on the RRU, as shown in Figure 8-21.Figure 8-21 Installing an RRU power cable DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.88
CAUTIONEnsure that the exposed shield layer of the power cable is properly tightened usingthe clip.2. Connect the other end of the RRU power cable to the output terminal on the DCDU.3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind thecable.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 the embedded power system(EPS) when the EPS is configured.1. Connect the tool-less female connector (pressfit type) at one end of the RRU powercable to the power supply socket on the RRU, as shown in Figure 8-21.2. Connect the tool-less female connector (pressfit type) at one end of the RRU powercable to the RRU0 port on the EPS subrack.NOTElThe blue core wire in the tool-less female connector (pressfit type) is connected to the leftport on the EPS subrack, and the black/brown core wire is connected to the right port onthe EPS subrack.lThe EPS can supply power to a maximum of six RRUs. The RRU power cable can beconnected to any of RRU0 to RRU5 ports on the EPS subrack.3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind thecable.4. Label the installed cable by referring to Attaching a Cable-Tying Label.----End8.11 Installing an Optical Fiber CableThis section describes the procedure for installing an optical fiber cable.PrerequisitesBefore the installation, distinguish single-mode optical modules from multi-mode opticalmodules by either of the following means: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 the rates of their corresponding CPRI ports.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.89
ContextA CPRI optical fiber cable transmits CPRI signals between a BBU and an RRU.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 raise the pullers, asshown in Figure 8-22.Figure 8-22 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 optical fiber cable to the optical module on the RRUside, as shown in Figure 8-23.Figure 8-23 Installing an CPRI optical fiber cableDBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.90
CAUTIONTo avoid any damage to optical fiber cables, secure the optical fiber cable in the cable clip nearthe power cable to leave some slack at the bend. Tighten the screws on the cable clip with atorque of 1.4 N·m (12.39 lbf·in.).Step 3 Connect the end labeled 2A and 2B of the optical fiber cable to the optical module on the BBUside.Step 4 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable.Step 5 Label the optical fiber 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 use a torque screwdriver to tighten the screws on each clip with a torque of 1.4N·m (12.39 lbf·in.), as shown in Figure 8-24.Figure 8-24 Closing clips DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.91
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 Figure8-25.Figure 8-25 Correct placement of waterproof blocks Step 3 Close the cover plate of the RRU cabling cavity, and use a torque screwdriver to tighten thescrews on the cover plate with a torque of 1.4 N·m (12.39 lbf·in.), as shown in Figure 8-26.Figure 8-26 Closing the cover plate of the RRU cabling cavity(1) Protection screw CAUTIONBefore tightening the screws on the cover plate, ensure that cables and waterproof blocks areproperly inserted into troughs.DBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.92
Step 4 Take off the ESD gloves, and pack up all the tools.----EndDBS3900RRU3252/RRU3256 Installation Guide 8 Installing RRU CablesIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.93
9 Checking the RRU Hardware InstallationThis section describes how to check RRU hardware installation after the installation is complete.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 waterproofed.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.DBS3900RRU3252/RRU3256 Installation Guide 9 Checking the RRU Hardware InstallationIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.94
10 Powering On an RRUThis section describes how to check the power-on status of an RRU after all the devices areinstalled.Figure 10-1 shows the RRU power-on check process.Figure 10-1 Powering on an RRUDBS3900RRU3252/RRU3256 Installation Guide 10 Powering On an RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.95
NOTElThe RRU is provided with -48 V DC power and the external voltage ranges from -32 V DC to -60 VDC.lWhen the RRU is working properly, the RUN indicator blinks one second on and one second off, andthe ALM indicator is steady off.DBS3900RRU3252/RRU3256 Installation Guide 10 Powering On an RRUIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.96
11 AppendixAbout This ChapterThis section describes the procedure for adding an easy power receptacle (pressfit type)connector.11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power CableThis section describes the procedure for adding an easy power receptacle (pressfit type)connector to an RRU power cable.DBS3900RRU3252/RRU3256 Installation Guide 11 AppendixIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.97
11.1 Adding an Easy Power Receptacle (Pressfit Type)Connector to an RRU Power CableThis section describes the procedure for adding an easy power receptacle (pressfit type)connector to an RRU power cable.ProcedureStep 1 Open the cabling cavity and take out the easy power receptacle (pressfit type) connector. Then,mark the lengths of the power cable for different operations based on the label on the cover ofthe cabling cavity, as shown in Figure 11-1.Figure 11-1 Marking the lengths of the RRU power cable for different operations Step 2 Use a cable cutter and wire stripper to strip off the specified length of the sheath from the powercable, as shown in Figure 11-2.Figure 11-2 Stripping off the specified length of sheath from the power cable Step 3 Strip off the sheath from each core wire, as shown in Figure 11-3.Figure 11-3 Stripping off the sheath from each core wire DBS3900RRU3252/RRU3256 Installation Guide 11 AppendixIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.98
NOTEEnsure that the length of the sheath stripped off from each core wire must match the length of the notch inthe easy power receptacle (pressfit type) connector, as shown in Figure 11-4.Figure 11-4 Stripping off the sheath from each core wire Step 4 Strip off the sheath from the power cable to expose its shield layer, as shown in Figure 11-5.Figure 11-5 Stripping off the sheath from the power cable to expose its shield layer Step 5 Use a Phillips screwdriver to loosen the screws, as shown in Figure 11-6.Figure 11-6 Loosening screwsDBS3900RRU3252/RRU3256 Installation Guide 11 AppendixIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.99
Step 6 Connect the blue core wire labeled NEG(-) to the - port and connect the black core wire labeledRTN(+) to the + port on the easy power receptacle (pressfit type) connector. Then, tighten thescrews, as shown in Figure 11-7.Figure 11-7 Adding an easy power receptacle (pressfit type) connector to a power cable Ensure that only a 1.5 mm (0.06 in.) core wire is exposed out of the connector and that theexposed part cannot be folded, as shown in Figure 11-8.Figure 11-8 Easy power receptacle (pressfit type) connectors installed in different ways CAUTIONIf the wire connections are incorrect, the equipment cannot be powered on. Correctly connectthe wires 10 seconds later.Step 7 Confirm that the core wires are securely connected to the connector, as shown in Figure 11-9.Figure 11-9 Correct installation of an easy power receptacle (pressfit type) connectorDBS3900RRU3252/RRU3256 Installation Guide 11 AppendixIssue Draft A (2012-11-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.100
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