Huawei Technologies RRU3942-850 Remote Radio Unit User Manual Hardware Description

Huawei Technologies Co.,Ltd Remote Radio Unit Hardware Description

Contents

Installation Manual

RRU3942Hardware DescriptionIssue 02Date 2012-06-29HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial BaseBantian, LonggangShenzhen 518129People's Republic of ChinaWebsite: http://www.huawei.comEmail: support@huawei.comIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.i
About This DocumentPurposeThis document provides reference for planning and deploying an RRU3942 (referred to as RRUin this document). It presents the exterior and describes the ports, functions, cable types,connector specifications, and cable connections of the RRU.Product VersionThe following table lists the product version related to this document.Product Name Product VersionDBS3900 V100R004C00 and later versionsDBS3900 GSM V100R013C00 and later versionsDBS3900 WCDMA V200R013C00 and later versionsDBS3900 LTE V100R005C00 and later versions Intended AudienceThis document is intended for:lBase station installation engineerslSystem engineerslSite maintenance engineersOrganization1 Changes in the RRU3942 Hardware DescriptionThis chapter describes the changes in the RRU3942 Hardware Description.2 RRU IntroductionRRU3942Hardware Description About This DocumentIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.ii
This chapter describes the function and exterior of the RRU as well as the ports and indicatorson the RRU.3 RRU CablesThis chapter describes RRU cables.4 RRU Auxiliary DevicesThis chapter describes RRU auxiliary devices.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. 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 ConventionsRRU3942Hardware Description About This DocumentIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iii
The 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. 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.RRU3942Hardware Description About This DocumentIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iv
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.RRU3942Hardware Description About This DocumentIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.v
ContentsAbout This Document.....................................................................................................................ii1 Changes in the RRU3942 Hardware Description....................................................................12 RRU Introduction..........................................................................................................................22.1 RRU Functions...................................................................................................................................................32.2 RRU Exterior......................................................................................................................................................32.3 RRU Ports...........................................................................................................................................................42.4 RRU Indicators...................................................................................................................................................93 RRU Cables...................................................................................................................................113.1 RRU Cable List................................................................................................................................................133.2 RRU PGND Cable............................................................................................................................................153.3 RRU Power Cable............................................................................................................................................163.4 RRU Alarm Cable............................................................................................................................................173.5 CPRI Fiber Optic Cable....................................................................................................................................183.6 RRU RF Jumper...............................................................................................................................................213.7 Inter-RRU RF Cable.........................................................................................................................................223.8 RRU AISG Multi-Wire Cable..........................................................................................................................223.9 RRU AISG Extension Cable............................................................................................................................234 RRU Auxiliary Devices..............................................................................................................254.1 OCB..................................................................................................................................................................26RRU3942Hardware Description ContentsIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vi
1 Changes in the RRU3942 HardwareDescriptionThis chapter describes the changes in the RRU3942 Hardware Description.02 (2012-06-29)This is the second official release.Compared with issue 01 (2012-04-25), this issue does not include any new information.Compared with issue 01 (2012-04-25), this issue includes the following changes:Topic Change Description3.2 RRU PGND Cable Added the length information of the cables.3.3 RRU Power Cable3.7 Inter-RRU RF Cable3.8 RRU AISG Multi-Wire Cable3.9 RRU AISG Extension Cable3.1 RRU Cable List Optimized the contents in this section. Compared with issue 01 (2012-04-25), no information is deleted from this issue.01 (2012-04-25)This is the first official release.Compared with draft A (2012-01-10), this issue does not include any modification.Draft A (2012-01-10)This is a draft.RRU3942Hardware Description 1 Changes in the RRU3942 Hardware DescriptionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.1
2 RRU IntroductionAbout This ChapterThis chapter describes the function and exterior of the RRU as well as the ports and indicatorson the RRU.2.1 RRU FunctionsThis section describes the main functions of the RRU.2.2 RRU ExteriorThis section describes the exterior and dimensions of an RRU.2.3 RRU PortsThis section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavitypanel, and indicator panel.2.4 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status.RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.2
2.1 RRU FunctionsThis section describes the main functions of the RRU.The Remote Radio Unit (RRU) performs the following functions:lReceives downlink baseband data from the BBU and sends uplink baseband data to theBBU.lReceives RF signals from the antenna system, down-converts the signals to intermediatefrequency (IF) signals, amplifies the IF signals, and performs analog-to-digital conversion.The transmit (TX) channel filters downlink signals, performs digital-to-analog conversion,and up-converts RF signals to the TX band.lMultiplexes receive (RX) and TX signals on the RF channel, which enables these signalsto share the same antenna path. It also filters the RX and TX signals.lProvides a built-in Bias Tee (BT). The built-in BT couples RF signals and OOK signalsand transmits them through the TX/RX port A. The built-in BT also supplies power to thetower mounted amplifier (TMA).lThe RRU can be powered by the AC/DC power module. In this case, this RRU is calledAC RRU. For details about the AC/DC power module, see the AC/DC Power Module UserGuide.2.2 RRU ExteriorThis section describes the exterior and dimensions of an RRU.Figure 2-1 shows an RRU.Figure 2-1 RRU exterior Figure 2-2 shows RRU dimensions.RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.3
Figure 2-2 RRU dimensions 2.3 RRU PortsThis section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavitypanel, and indicator panel.Figure 2-3 shows the ports on the RRU panels.RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.4
Figure 2-3 Ports on the RRU panels Table 2-1 describes ports and indicators on the RRU panels.Table 2-1 Ports and indicators on the RRU panelsItem Silkscreen Description(1) Ports at the bottom ANT_TX/RXA TX/RX port A, supporting RET signaltransmissionANT_RXC RX port CANT_RXD Port RX port DRRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.5
Item Silkscreen DescriptionANT_TX/RXB TX/RX port BRX_IN/OUT Port for the inter-RRU RF cableRET Communication port for the RET antenna,supporting RET signal transmission(2) Ports in the cablingcavityRTN(+) Power supply socketNEG(-)CPRI0 Optical/electrical port 0CPRI1 Optical/electrical port 1EXT_ALM Port for alarm reporting(3) Indicators RUN For details, see 2.4 RRU Indicators.ALMACTVSWRCPRI0/IR0CPRI1/IR1 NOTEThe RET ports to be used are determined by the software configuration.Table 2-2 describes how to use RF ports.Table 2-2 UsageProduct Version TX/RXChannelNumberof UsedRF PortsUsage RemarklDBS3900V100R004C00lDBS3900 GSMV100R013C00lDBS3900WCDMAV200R013C001*2T2R 2 ANT_TX/RXA works withANT_TX/RXB.A singlesectorRRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.6
Product Version TX/RXChannelNumberof UsedRF PortsUsage RemarklDBS3900 GSMV100R014C00and later versions1*1T2R 2 It is recommended thatANT_TX/RXA works withANT_RXC.You can also use the ports inthe following ways:ANT_TX/RXB works withANT_RXD.A singlesector1*2T2R 2 ANT_TX/RXA works withANT_TX/RXB.A singlesector2*1T2R 4 ANT_TX/RXA works withANT_RXC and ANT_TX/RXB works withANT_RXD .Two sectorslDBS3900V100R007C00and later versionslDBS3900WCDMAV200R014C00and later versionslDBS3900 LTEV100R005C00and later versions1*1T2R 2 It is recommended thatANT_TX/RXA works withANT_RXC.You can also use the ports inthe following ways:ANT_TX/RXB works withANT_RXD.A singlesector1*2T2R 2 ANT_TX/RXA works withANT_TX/RXB.A singlesector1*2T4R 4 ANT_TX/RXA,ANT_RXC, ANT_TX/RXB, and ANT_RXD worktogether.A singlesector2*1T2R 4 ANT_TX/RXA works withANT_RXC and ANT_TX/RXB works withANT_RXD .Two sectors Figure 2-4 shows the recommended usage of the RF ports on an RRU3942 used for DBS3900V100R004C00, DBS3900 GSM V100R013C00 and DBS3900 WCDMA V200R013C00.RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.7
Figure 2-4 Recommended usage of the RF ports for DBS3900 V100R004C00, DBS3900 GSMV100R013C00 and DBS3900 WCDMA V200R013C00 Figure 2-5 shows the recommended usage of the RF ports on an RRU3942 used for DBS3900GSM V100R014C00 and later versions.Figure 2-5 Recommended usage of the RF ports for DBS3900 GSM V100R014C00 and laterversions Figure 2-6 shows the recommended usage of the RF ports on an RRU3942 used for DBS3900V100R007C00 and later versions, DBS3900 WCDMA V200R014C00 and later versions,DBS3900 LTE V100R005C00 and later versions.RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.8
Figure 2-6 Recommended usage of the RF ports for DBS3900 V100R007C00 and later versions,DBS3900 WCDMA V200R014C00 and later versions, DBS3900 LTE V100R005C00 and laterversions 2.4 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status.For detailed positions of RRU indicators, see 2.3 RRU Ports.Table 2-3 describes RRU indicators.Table 2-3 RRU indicatorsSilkscreenColor Status DescriptionRUN Green Steady on There is power supply, but the module isfaulty.Steady off There is no power supply, or the module isfaulty.Blinking (on for1s and off for 1s)The board is running properly.Blinking (on for0.125s and off for0.125s)Software is being loaded to the module, orthe module is not started.ALM Red Steady on An alarm is generated, and the module mustbe replaced.RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.9
SilkscreenColor Status DescriptionBlinking (on for1s and off for 1s)An alarm is generated. The alarm may becaused by a fault on a related board or port.Therefore, you need to locate the fault beforedeciding whether to replace the module.Steady off No alarm is generated.ACT Green Steady on The module is running properly with TXchannels enabled or the software is beingloaded without RRU running.Blinking (on for1s and off for 1s)The module is running properly with TXchannels disabled.VSWR Red Steady off No Voltage Standing Wave Ratio (VSWR)alarm is generated.Blinking (on for1s and off for 1s)VSWR alarms are generated on theANT_TX/RXB port.Steady on VSWR alarms are generated on theANT_TX/RXA port.Blinking (on for0.125s and off for0.125s)VSWR alarms are generated on theANT_TX/RXA and ANT_TX/RXB ports.CPRI0/IR0 Red orgreenSteady green The CPRI link is functioning properly.Steady red An optical module fails to transmit or receivesignals because the optical module is faultyor the fiber optic cable is broken.Blinking red (onfor 1s and off for1s)The CPRI link is out of lock because ofmutual lock of dual-mode clock sources ormismatched data rates over CPRI ports.Steady off The optical module cannot be detected, or theCPRI cable is not connected properly.CPRI1/IR1 Red orgreenSteady green The CPRI link is functioning properly.Steady red An optical module fails to receive signalsbecause the optical module is faulty or thefiber optic cable is broken.Blinking red (onfor 1s and off for1s)The CPRI link is out of lock because ofmutual lock of dual-mode clock sources ormismatched data rates over CPRI ports.Steady off The optical module cannot be detected, or theCPRI cable is not connected properly. RRU3942Hardware Description 2 RRU IntroductionIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.10
3 RRU CablesAbout This ChapterThis chapter describes RRU cables.3.1 RRU Cable ListThis section describes RRU cable connections.3.2 RRU PGND CableAn RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of theRRU. The maximum length of the RRU PGND cable is 30 m (98.42 ft.).3.3 RRU Power CableThe RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RRU. Themaximum length of the RRU power cable is 50 m (164.04 ft.).3.4 RRU Alarm CableThe RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an externaldevice to an RRU so that the base station monitors the operating status of external devices. Themaximum length of the RRU alarm cable is 5 m (16.40 ft.).3.5 CPRI Fiber Optic CableCPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiberoptic cables. They transmit CPRI signals.3.6 RRU RF JumperThe 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna.3.7 Inter-RRU RF CableAn inter-RRU RF cable connects the RX_IN/OUT ports on two RRUs in the same cell andtransmits RF signals between the RRUs. The maximum length of the inter-RRU RF cable is 2m (6.56 ft.).3.8 RRU AISG Multi-Wire CableAn RRU AISG multi-wire cable connects an RRU and an RCU to transmit control signals froma base station to an RET antenna. When the RRU is connected to the RET antenna, an AISGmulti-wire cable transmits RS485 signals. The maximum length of the AISG multi-wire cableis 5 m (16.40 ft.).3.9 RRU AISG Extension CableRRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.11
When the distance between an RRU and an RCU is longer than 5 m (16.4 ft.), an AISG multi-wire cable is not long enough to connect the RRU and the RCU. In this case, an AISG extensioncable is used to extend the AISG multi-wire cable for transmitting RS485 signals. The maximumlength of the AISG extension cable is 15 m (49.21 ft.).RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.12
3.1 RRU Cable ListThis section describes RRU cable connections.Table 3-1 lists RRU cables.Table 3-1 RRU cablesCable One End The Other EndConnector InstallationPositionConnector InstallationPosition3.2 RRUPGNDCableOT terminal (M6,16 mm2 or 0.025in.2)Groundterminal on theRRUOT terminal(M8, 16 mm2 or0.025 in.2)Ground terminalon the ground bar3.3 RRUPower CableTool-less femaleconnector(pressfit type)NEG(-) andRTN(+) portson the RRUTool-less femaleconnector(pressfit type)One of RRU0 toRRU5 ports onthe EPUOne of LOAD0 toLOAD5 ports onthe DCDU-11B3.4 RRUAlarm CableDB15 maleconnectorEXT_ALMport on theRRUCord endterminalExternal alarmdeviceRRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.13
Cable One End The Other EndConnector InstallationPositionConnector InstallationPosition3.5 CPRIFiber OpticCable (inmulti-modescenarios)DLC connector CPRI0 port onthe RRUCPRI1 port onthe RRUDLC connector GSM+UMTS(GU) modeCPRI port on theGTMU in theBBUCPRI port on theWBBP in theBBUGSM+LTE (GL)modeCPRI port on theGTMU in theBBUCPRI port on theLBBP in the BBUUMTS+LTE(UL) modeCPRI port on theWBBP in theBBUCPRI port on theLBBP in the BBU3.5 CPRIFiber OpticCable (insingle-modescenarios)DLC connector CPRI0 port onthe RRUDLC connector GSM only (LO)modeCPRI port on theGTMU in theBBUUMTS only (LO)modeCPRI port on theWBBP in theBBULTE only (LO)modeCPRI port on theLBBP in the BBU3.6 RRU RFJumperDIN maleconnectorANT_TX/RXA orANT_TX/RXB port onthe RRUDIN maleconnectorAntenna systemRRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.14
Cable One End The Other EndConnector InstallationPositionConnector InstallationPosition3.7 Inter-RRU RFCableDB2W2connectorRX_IN/OUTport on theRRUDB2W2connectorRX_IN/OUT porton the RRU3.8 RRUAISG Multi-Wire CableWaterproofedDB9 maleconnectorRET port onthe RRUStandard AISGfemale connectorStandard AISGmale connectoron the RCU or onthe AISGextension cable3.9 RRUAISGExtensionCableStandard AISGmale connectorStandard AISGfemaleconnector onthe AISGmulti-wirecableStandard AISGfemale connectorStandard AISGmale connectoron the RCU 3.2 RRU PGND CableAn RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of theRRU. The maximum length of the RRU PGND cable is 30 m (98.42 ft.).ExteriorAn RRU PGND cable is green or green and yellow with a cross-sectional area of 16 mm2 (0.025in.2). This cable has an OT terminal at each end. Figure 3-1 shows an RRU PGND cable.Figure 3-1 PGND cable(1) OT terminal (M6, 16 mm2 or 0.025 in.2) (2) OT terminal (M8, 16 mm2 or 0.025 in.2)NOTElIf the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 16 mm2(0.025 in.2) or larger is recommended.lOne OT terminal must be added to each end of the PGND cable onsite.lYou can determine the color of the cable and whether to use corresponding two-hole OT terminalsbased on local regulations. RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.15
Figure 3-2 shows a two-hole OT terminal.Figure 3-2 Two-hole OT terminal 3.3 RRU Power CableThe RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RRU. Themaximum length of the RRU power cable is 50 m (164.04 ft.).ExteriorThe cross-sectional areas of the RRU power cable is 6 mm2 (0.0093 in.2). A tool-less femaleconnector (pressfit type) needs to be added to one end of the power cable and a correspondingterminal needs to be added to the other end. The corresponding terminal is added to the barewire based on the requirements of the connector on the external power device, as shown inFigure 3-3.Figure 3-3 RRU power cable(1) -48 V DC power cable (2) Shield layer (3) Tool-less female connector(pressfit type) Pin AssignmentThe DC power input cable is a 2-wire cable. Table 3-2 and Table 3-3 describe the pin assignmentfor the wires of a DC power input cable.Table 3-2 Pin assignment for the wires of a DC power input cable (North American Standards)Wire ColorNEG(-) BlueRTN(+) Black RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.16
Table 3-3 Pin assignment for the wires of a DC power input cable (European Standards)Wire ColorNEG(-) BlueRTN(+) Brown 3.4 RRU Alarm CableThe RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an externaldevice to an RRU so that the base station monitors the operating status of external devices. Themaximum length of the RRU alarm cable is 5 m (16.40 ft.).ExteriorAn alarm cable has a DB15 male connector at one end and eight cord end terminals at the otherend, as shown in Figure 3-4.Figure 3-4 Alarm cable(1) DB15 male connector (2) Cord end terminal Pin AssignmentTable 3-4 describes the pin assignment for the wires of an RRU alarm cable.Table 3-4 Pin assignment for the wires of an RRU alarm cableRRUAlarmPortPin of theDB15MaleConnectorColor Type Cord EndTerminalDescriptionDrycontactX1.2 White andblueTwistedpairX2 SWITCH_INPUT0+RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.17
RRUAlarmPortPin of theDB15MaleConnectorColor Type Cord EndTerminalDescriptionX1.3 Blue X3 SWITCH_INPUT0-(GND)X1.6 White andorangeTwistedpairX4 SWITCH_INPUT1+X1.7 Orange X5 SWITCH_INPUT1-(GND)RS485 X1.10 White andgreenTwistedpairX6 APM RX-X1.11 Green X7 APM RX+X1.13 White andbrownTwistedpairX8 APM TX-X1.14 Brown X9 APM TX+ 3.5 CPRI Fiber Optic CableCPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiberoptic cables. They transmit CPRI signals.NOTElAn ODF can be used when the distance between a BBU and an RRU or the distance betweeninterconnected RRUs is longer than 100 m (328.08 ft).lA single-mode fiber optic cable connects a BBU to an ODF or connects an ODF to an RRU.The maximum length of a CPRI fiber optic cable is 150 m (492.12 ft) When the fiber opticalcable connects a BBU and an RRU. The length of a CPRI fiber optic cable is 10 m (32.81 ft)when the fiber optical cable connects two RRUs.ExteriorFigure 3-5 shows a fiber optic cable between a BBU and an RRU or between RRUs, with aDLC connector at each end.RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.18
Figure 3-5 Fiber optical cable between a BBU and an RRU or between RRUs(1) DLC connector (2) Branch optical fiber (3) Label on the branch optical fiber When a fiber optical cable connects a BBU and an RRU, the optical fibers on the BBU side andRRU side are 0.34 m (0.013 in.) and 0.03 m (0.0012 in.) long, respectively. When a fiber opticalcable connects two RRUs, the optical fibers on both RRU sides are 0.03 m (0.0012 in.) long.Figure 3-6 shows the connections for a CPRI fiber optic cable between a BBU and an RRU.Figure 3-6 Connections for a CPRI fiber optic cable between a BBU and an RRU(1) CPRI fiber optic cable between a BBU and an RRUFigure 3-7 shows a single-mode fiber optic cable between a BBU and an ODF or between anODF and an RRU, with a DLC connector at one end and an FC connector at the other end.Figure 3-7 Single-mode fiber optic cable between a BBU and an ODF or between an ODF andan RRU(1) DLC connector (2) Branch optical fiber(3) Label on the branch optical fiber (4) FC connector RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.19
When a single-mode fiber optic cable connects a BBU and an ODF, the optical fibers on theBBU side and ODF side are 0.34 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.When a single-mode fiber optic cable connects an ODF and an RRU, the optical fibers on theRRU side and ODF side are 0.03 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.Figure 3-8 shows the connections for a single-mode CPRI fiber optic cable between a BBU andan ODF or between an ODF and an RRU.Figure 3-8 Connections for a single-mode fiber optic cable between a BBU and an ODF orbetween an ODF and an RRU(1) Single-mode CPRI fiber optic cable between a BBUand an ODF(2) Single-mode CPRI fiber optic cable between anODF and an RRUNOTEA CPRI fiber optic cable must be connected to optical modules in the CPRI ports. A multi-mode fiber opticcable and single-mode fiber optic cable are connected to multi-mode optical modules and single-mode opticalmodules, respectively.Pin AssignmentTable 3-5, Table 3-6, and Table 3-7 describe the labels on and recommended connections forfiber optic cables of an optical assembly.Table 3-5 Labels on and recommended connections for optical fibers of an optical assemblybetween a BBU and an RRULabel Connected To1A CPRI RX port on the RRU1B CPRI TX port on the RRU2A TX port on the BBU2B RX port on the BBU RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.20
Table 3-6 Labels on and recommended connections for optical fibers of a fiber optic cablebetween RRUsLabel Connected To1A CPRI RX port on RRU 11B CPRI TX port on RRU 12A CPRI TX port on RRU 02B CPRI RX port on RRU 0 Table 3-7 Labels on and recommended connections for optical fibers of a single-mode opticalassembly between a BBU and an ODF or between an ODF and an RRULabel Connected To1A RX port on the BBU or CPRI RX port on the RRU1B TX port on the BBU or CPRI TX port on the RRU2A ODF2B ODF 3.6 RRU RF JumperThe 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna.NOTElWhen the distance between an RRU and an antenna is within 14 m (45.93 ft.), connect one end of the RFjumper to the ANT-TX/RXA or ANT-TX/RXB port at the RRU bottom, and connect the other end to theantenna.lWhen the distance between the RRU and the antenna exceeds 14 m (45.93 ft.), connect one end of the RFjumper to the ANT-TX/RXA or ANT-TX/RXB port at the RRU bottom, and connect the other end to thefeeder. Then, connect the other end of the feeder to the antenna.lIf the customer prepares the RF jumper, the length of the RF jumper should be as short as possible and notexceed 2 m (6.56 ft.).ExteriorAn RF jumper has a DIN male connector at one end and a customized connector at the otherend.Figure 3-9 shows an RF jumper with a DIN male connector at each end.RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.21
Figure 3-9 RF jumper(1) DIN male connector 3.7 Inter-RRU RF CableAn inter-RRU RF cable connects the RX_IN/OUT ports on two RRUs in the same cell andtransmits RF signals between the RRUs. The maximum length of the inter-RRU RF cable is 2m (6.56 ft.).ExteriorFigure 3-10 shows an inter-RRU RF cable with a DB2W2 connector at each end.Figure 3-10 Inter-RRU RF cable(1) DB2W2 connector 3.8 RRU AISG Multi-Wire CableAn RRU AISG multi-wire cable connects an RRU and an RCU to transmit control signals froma base station to an RET antenna. When the RRU is connected to the RET antenna, an AISGmulti-wire cable transmits RS485 signals. The maximum length of the AISG multi-wire cableis 5 m (16.40 ft.).NOTEAn RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands from abase station and runs the commands to drive the stepper motor. Using a gear, the stepper motor drives theadjustable phase shifter in the antenna and changes the downtilt angle.ExteriorAn AISG multi-wire cable has a waterproofed DB9 male connector at one end and a standardAISG female connector at the other end, as shown in Figure 3-11.RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.22
Figure 3-11 AISG multi-wire cable(1) Waterproofed DB9 male connector (2) Standard AISG female connector Pin AssignmentTable 3-8 describes the pin assignment for the wires of an AISG multi-wire cable.Table 3-8 Pin assignment for the wires of an AISG multi-wire cableX1 End (Pin of theWaterproofedDB9 MaleConnector)X2 End (Pin of theStandard AISGFemale Connector)Color Type DescriptionX1.1 X2.1White andblue Twistedpair +12 VBlueX1.3 X2.3 White andorange TwistedpairRS485 BX1.5 X2.5 Orange RS485 AX1.4 X2.4 White andgreen- GNDX1.9 and X1.4 areinterconnected.- - - GND- X2.1 and X2.6 areinterconnected.- - +12 V- X2.4 and X2.7 areinterconnected.- - GND 3.9 RRU AISG Extension CableWhen the distance between an RRU and an RCU is longer than 5 m (16.4 ft.), an AISG multi-wire cable is not long enough to connect the RRU and the RCU. In this case, an AISG extensionRRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.23
cable is used to extend the AISG multi-wire cable for transmitting RS485 signals. The maximumlength of the AISG extension cable is 15 m (49.21 ft.).ExteriorAn AISG multi-wire cable has a standard AISG male connector at one end and a standard AISGfemale connector at the other end, as shown in Figure 3-12.Figure 3-12 AISG extension cable(1) Standard AISG male connector (2) Standard AISG female connector Pin AssignmentTable 3-9 describes the pin assignment for the wires of an AISG extension cable.Table 3-9 Pin assignment for the wires of an AISG extension cableX1 End (Pinof theStandardAISG MaleConnector)X2 End (Pinof theStandardAISGFemaleConnector)Color Type DescriptionX1.1 X2.1 White and blue Twisted pair +12 VBlueX1.7 X2.7 White and orange Twisted pair DC Return AOrangeX1.3 X2.3 White and green Twisted pair RS485 BX1.5 X2.5 Green RS485 AX1.6 X2.6 White and brown Twisted pair +24 VBrown RRU3942Hardware Description 3 RRU CablesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.24
4 RRU Auxiliary DevicesAbout This ChapterThis chapter describes RRU auxiliary devices.4.1 OCBAn Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.Power cables shipped with RRUs cannot support long-distance power supply. Therefore, whenpower supply is far from the equipment, cables with large core diameters are used, and an OCBconnects these cables and RRU power cables.RRU3942Hardware Description 4 RRU Auxiliary DevicesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.25
4.1 OCBAn Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.Power cables shipped with RRUs cannot support long-distance power supply. Therefore, whenpower supply is far from the equipment, cables with large core diameters are used, and an OCBconnects these cables and RRU power cables.Application Scenario of an OCBFigure 4-1 shows the application scenario of an OCB.Figure 4-1 Application scenario of an OCB For details about the structure, functions, installation, and maintenance of an OCB, see the OCBUser Guide.RRU3942Hardware Description 4 RRU Auxiliary DevicesIssue 02 (2012-06-29) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.26

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