Huawei Technologies RRU3804B4 Distributed NodeB Remote Radio Unit User Manual User Guide

Huawei Technologies Co.,Ltd Distributed NodeB Remote Radio Unit User Guide

Contents

User Manual 3

Figure 3-81 Removing the plastic housingStep 2 Secure the connecting boards on the RRU3804 module, as shown in Figure 3-82.Figure 3-82 Securing the connecting boardsStep 3 Secure the attachment plate on the SRXU, as shown in Figure 3-83.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-67
Figure 3-83 Securing the attachment plate on the SRXUStep 4 Install the SRXU by fitting the tabs on the attachment plate into the anchor slots in the connectingboard, as shown in Figure 3-84.Figure 3-84 Installing the SRXUStep 5 Lead two screws M6 x 20 through the holes in the bottom of the module. Then, secure the SRXUon the connecting boards, as shown in Figure 3-85.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-68 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-85 Securing the SRXU----End3.6.2 Installing the SRXUs on the Two RRU3804sThis describes how to install the SRXUs on the two RRU3804 that are mounted on the metalpole. The procedures for installing the SRXUs on the two RRU3804s in pole or wall installationmode are the same.PrerequisiteThe two RRU3804s are installed.ContextThe SRXU can be installed on the RRU3804 that is in either ordinary or reverse mode. Theprocedures for installing the SRXU on the RRU3804 in ordinary and reverse modes are the same.Figure 3-86 shows the SRXUs installed on the two RRU3804s.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-69
Figure 3-86 SRXUs installed on the two RRU3804sProcedurelSide-mounted installation1. Remove the plastic housing of each RRU3804, as shown in Figure 3-87.Figure 3-87 Removing the plastic housings2. Secure the connecting boards on the RRU3804 module in ordinary mode, as shownin Figure 3-88.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-70 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-88 Securing the connecting boards on the RRU3804 module in ordinarymode3. Secure the attachment plate on the first SRXU, as shown in Figure 3-89.Figure 3-89 Securing the attachment plate on the first SRXURRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-71
4. Install the first SRXU on the RRU3804 in ordinary mode by fitting the tabs on theattachment plate into the anchor slots in the connecting board, as shown in Figure3-90.Figure 3-90 Installing the first SRXU5. Lead two screws M6 x 20 through the holes in the bottom of the module. Then, securethe SRXU on the connecting boards, as shown in Figure 3-91.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-72 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-91 Securing the first SRXU6. Perform the previous steps to install the other SRXU on the RRU3804 in reverse mode.lRear-mounted installation1. Remove the plastic housing of each RRU3804, as shown in Figure 3-92.Figure 3-92 Removing the plastic housings2. Install the two SRXUs by referring to 3.6.1 Installing the SRXU on a SingleRRU3804. The procedure for installing the SRXUs on the two rear-mountedRRU3804s is the same as that for installing the SRXU on the single RRU3804.Figure 3-93 shows the SRXUs installed on the two rear-mounted RRU3804s.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-73
Figure 3-93 SRXUs installed on the two rear-mounted RRU3804s----End3.6.3 Installing the SRXUs on the Three RRU3804sThis describes how to install the SRXUs on the three RRU3804 that are mounted on the metalpole. The procedures for installing the SRXUs on the three RRU3804s in pole or wall installationmode are the same.PrerequisiteThe three RRU3804s are installed.ContextThe SRXU can be installed on the RRU3804 that is in either ordinary or reverse mode. Theprocedures for installing the SRXU on the RRU3804 in ordinary and reverse modes are the same.Figure 3-94 shows the SRXUs installed on the three RRU3804s.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-74 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-94 SRXUs installed on the three RRU3804sProcedureStep 1 Remove the plastic housings of the RRU3804s on the left and right, as shown in Figure 3-95Figure 3-95 Removing the plastic housingsStep 2 Install two SRXUs on the left and right RRU3804s by referring to 3.6.2 Installing the SRXUson the Two RRU3804s. The procedure for installing the SRXUs on these RRU3804s is thesame as that for installing the SRXUs on the two side-mounted RRU3804s.Step 3 Determine the position of the third SRXU as required.NOTEThe third SRXU can be installed on either the left or the right. It is recommended that it be installed on theright. The following description takes installing the third SRXU on the right as an example.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-75
Step 4 Secure the connecting boards on the right SRXU that is already installed, as shown in Figure3-96.Figure 3-96 Securing the connecting boardsStep 5 Secure the attachment plate on the third SRXU.Step 6 Install the third SRXU on the right SRXU by fitting the tabs on the attachment plate into theanchor slots in the connecting board, as shown in Figure 3-97.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-76 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-97 Installing the third SRXUStep 7 Lead two screws M6 x 20 through the holes in the bottom of the module, as shown in Figure3-98. Then, secure the SRXU on the connecting boards.Figure 3-98 Securing the third SRXU----EndRRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-77
3.7 Installing RRU3804 and SRXU CablesThis describes how to install the cables of the RRU3804 and SRXU, remove and install the coverplate of the RRU3804 or SRXU cabling cavity.3.7.1 Cabling Specifications for the NodeBThe power cables and signal cables for the NodeB should be routed in compliance with thecabling specifications to avoid electromagnetic interference to the signals.3.7.2 Connections of RRU3804 and SRXU CablesThis describes the cable connections between the RRU3804, SRXU, and other devices such asBBU3806, external power supply, and antenna system.3.7.3 Installing the PGND Cable of the RRU3804/SRXUThe PGND cable ensures the grounding of the RRU3804/SRXU.3.7.4 Installing the -48 V DC Power Cable of the RRU3804/SRXUThe –48 V DC power cable feeds external –48 V DC power to the RRU3804/SRXU.3.7.5 Installing the RF Jumper of the RRU3804/SRXUThe RF jumper of the RRU3804/SRXU is of two types: antenna jumper and interconnect jumper.The antenna jumper of the RRU3804/SRXU can be connected to the feeder or directly to theantenna. The interconnect jumper transmits RF signals between two RRU3804s/SRXUs.3.7.6 Installing the AISG Multi-Wire Cable of the RRU3804/SRXUThe AISG multi-wire cable connects the RRU3804/SRXU to the RCU.3.7.7 Installing the AISG Extension Cable of the RRU3804/SRXUIf the distance between the RRU3804/SRXU and the RCU is longer than 5 m, an AISG extensioncable is required.3.7.8 Installing the Boolean/RS485 Input Cable of the RRU3804The Boolean/RS485 input cable monitors the external signals.3.7.9 Opening and Closing the Cover Plate of the RRU3804 Cabling CavityBefore installing the –48 V DC power cable, CPRI optical cable, and Boolean input cable, youneed to open the cover plate of the RRU3804 cabling cavity. When the cables are connected tothe module, close the cover plate.3.7.10 Opening and Closing the Cover Plate of the SRXU Cabling CavityBefore installing the CPRI optical cable and PGND cable, you need to open the cover plate ofthe SRXU cabling cavity. When the cables are connected to the module, close the cover plate.3.7.1 Cabling Specifications for the NodeBThe power cables and signal cables for the NodeB should be routed in compliance with thecabling specifications to avoid electromagnetic interference to the signals.General Cabling SpecificationsBending radius of the cables should meet the following specifications:lThe bending radius of the 7/8" feeder should be larger than 250 mm, and that of the 5/4"feeder should be greater than 380 mm.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-78 Huawei Technologies Proprietary Issue 01 (2007-11-29)
lThe bending radius of the 1/4" jumper should be larger than 25 mm, and that of the 1/2"jumper should be larger than 32 mm.lThe bending radius of the signal cable should be at least 5 times larger than its diameterafter the cable is fixed. For the signal cable that is often bent or pulled out/plugged in, thebending radius should be at least 7 times larger than its diameter.lThe bending radius of the optical cable should be at least 20 times larger than its diameter.lThe bending radius of the E1/T1/J1 cable should be at least 7 times larger than its diameterafter the cable is fixed. For the E1/T1/J1 cable that is often bent or pulled out/plugged in,the bending radius should be at least 10 times larger than its diameter.lThe bending radius of the signal cable should be at least 5 times larger than its diameterafter the cable is fixed. For the signal cable that is often bent or pulled out/plugged in, thebending radius should be at least 7 times larger than its diameter.The cables should be bundled as follows:lCables of different types should be routed separately. The cables cannot be coiled.lThe cables should be tightly and neatly bundled. Ensure that the jackets of the cables arenot damaged.lTwo adjacent cable ties should be spaced 200 mm and face the same direction. The cableties at the same horizontal line should be on the straight line. Extra length of cable tiesshould be cut off.lLabels or nameplates should be attached or bundled on the cables after they are installed.The cables should be routed in category as follows:lCables of different types should be routed separately.lCables of different types cannot be crossed.lSpace between cables of different types should be larger than 30 mm when the cables arerouted parallel inside the cabinet. Space between cables of different types should be largerthan 100 mm when the cables are routed parallel outside the cabinet. If such requirementscannot be met, the cables should be separated with specified objects.Special Cabling SpecificationsCabling specifications for routing the power cables and the PGND cables are as follows:lPositions of routing the cables should meet requirements of the engineering design and thegeneral cabling specifications.lIf the cable is not long enough, replace the cable. Do not add connectors or solder joints tolengthen the cable.lInsulating treatment should be done on the cables if they need to be bundled and routed onthe metal cable racks.lDo not install fuses or switches on the cables.lThe -48 V power cable and GND cable should be bundled together.lGrounding points at both ends of the PGND cables should be in proper electric contact andprocessed with antirust treatment.lThe low-voltage AC power cable for the NodeB should be covered with a metallic conduitand be buried in the ground for at least 50 m before they are led into the equipment room.Note that if such cables are shorter than 50 m, they should be completely buried in theRRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-79
ground. If such cables are routed overhead and led into the room, surge protection for theconnector of the AC power cable will be affected.lThe PGND cables should be buried in the ground or routed indoors. The PGND cablesshould not be routed overhead before they are led into the equipment room.The specifications for routing the E1/T1 cables are as follows:lPositions of routing the cables should meet requirements of the engineering design and thegeneral cabling specifications.lThe cables should not be routed overhead outdoors.lIf the cables have to be routed outdoors, the cables should be covered with metallic conduitswhich are reliably grounded at both ends.lIf the cables have to be routed outdoors and it is impossible to install them under the ground,they should be covered and shielded with metallic conduits which are reliably groundedoutdoors or connected to the grounding bar in the room. If the cables are covered withmetallic jackets, ensure that both ends of each jacket are reliably grounded outdoors orconnected to the grounding bar in the room.lExtra length of E1 cables should be reserved when they are curved.lBefore the E1 cables are led out of the cabinet, they should be properly grounded.lThe wires not in use should be grounded in the equipment room.The specifications for routing the optical cables are as follows:lPositions of routing the cables should meet requirements of the engineering design and thegeneral cabling specifications.lExtra length of the optical cable should be reserved at the point that the cable is curved.lDo not stretch the optical cables, step on the cables, or place heavy objects on the cables.Keep the cables away from sharp objects to avoid damage. The optical cable that is curvedor pressed or the optical connector which is damaged cannot be used.lExtra optical cables should be coiled on the specified device such as the fiber coiler. Usemoderate force to coil the optical cables. Do not bend the cables forcibly lest they bedamaged.lPVC corrugated tubes should be used to cover the optical cables for protection purposewhen they are led out of the cabinet.lDustproof caps should be used to cover the optical connectors not in use.lIf one end of the optical cable is connected to an optical device, do not look directly at theend face of the optical connector. Otherwise, your eyes may be hurt.lUse soft materials such as fireproof cotton to fill in the optical connector at the top of thecabinet.lYou need to check whether the optical connector is polluted before installing the cables. Ifit is polluted, it is recommended that you use a fiber cleaner or dustfree cloth to clean theconnector.3.7.2 Connections of RRU3804 and SRXU CablesThis describes the cable connections between the RRU3804, SRXU, and other devices such asBBU3806, external power supply, and antenna system.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-80 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Cable Connections of One RRU3804 with and Without the SRXUFigure 3-99 and Figure 3-100 show the cable connections of one RRU3804 with and withoutthe SRXU.Figure 3-99 Cable connections of one RRU3804 without the SRXUNOTElWhen one RRU3804 is installed, the PGND cable is connected to the grounding bolt on the RRU3804module.lDifferent external power supply devices are used for the RRU3804 depending on field requirements.The external power supply can be an APM, OFB, or SPD40R.lThe AISG multi-wire cable connects the RRU3804 to the RCU. When the distance between theRRU3804 and the RCU is too long, the AISG extension cable is used between the AISG multi-wirecable and the RCU.lThe antenna jumper directly connects the RRU3804 to the antenna. When the distance between theRRU3804 and the antenna is longer than 14 m, the feeder is required.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-81
Figure 3-100 Cable connections of one RRU3804 with the SRXUNOTElWhen the SRXU is installed, the antenna jumper must be connected to the SRXU.Cable Connections of Multiple RRU3804s with and Without the SRXUsFigure 3-101 and Figure 3-102 show the cable connections of multiple RRU3804s with andwithout the SRXUs.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-82 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-101 Cable connections of multiple RRU3804s without the SRXUsNOTElThe interconnect jumper connects two RRU3804s and implements the networking in TX diversitymode.lDifferent external power supply devices are used for the RRU3804 depending on field requirements.The external power supply can be an APM, OFB, or SPD40R.Figure 3-102 Cable connections of multiple RRU3804s with the SRXUsRRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-83
NOTElInterconnect jumper is used to implement the interconnection between combined RRU3804s orbetween combined SRXUs. The interconnection between the RRU3804 and the SRXU, however,cannot be implemented.3.7.3 Installing the PGND Cable of the RRU3804/SRXUThe PGND cable ensures the grounding of the RRU3804/SRXU.ProcedureStep 1 Route the PGND cable by referring to 3.7.1 Cabling Specifications for the NodeB.Step 2 Add an OT terminal to each end of the PGND cable by referring to Assembling the OTTerminal and the Power Cable.NOTEThe 2-hole OT terminal can also be added to the PGND cable. The method of adding a 2-hole OT terminalis the same that of adding an OT terminal.Step 3 Connect the PGND cable according to field requirements.Condition ActionOnly the RRU3804 is installed. Connect one of the OT terminal to thegrounding bolt on the RRU3804 module, asshown in Figure 3-103.Both the RRU3804 and the SRXU areinstalled.Connect a PGND cable between theRRU3804 and the SRXU. Then, connect oneof the OT terminal on the other PGND cableto the grounding bolt on the RRU3804module, as shown in Figure 3-104.Figure 3-103 Connecting the PGND cable (1)3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-84 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-104 Connecting the PGND cable (2)CAUTIONKeep the crimping tube of the OT terminal in the direction shown in Figure 3-105 wheninstalling the OT terminal.Figure 3-105 Connecting the OT terminalStep 4 Connect the other end of the PGND cable to the nearest grounding bolt, depending on theconfiguration of auxiliary devices at the site.----End3.7.4 Installing the -48 V DC Power Cable of the RRU3804/SRXUThe –48 V DC power cable feeds external –48 V DC power to the RRU3804/SRXU.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-85
ContextCAUTIONThe DC power cable that feeds external power to the RRU3804 must be a shielded cable.Otherwise, the RRU3804 is vulnerable to damage caused by lightning stroke.ProcedureStep 1 Route the power cable by referring to 3.7.1 Cabling Specifications for the NodeB.Step 2 Add two OT terminals to one end of the power cable. Figure 3-106 shows the power cable withtwo OT terminals.Figure 3-106 Power cable with two OT terminalsTo add the OT terminals, perform the following steps:1. Determine lengths of power cable for different operation according to the scales on thecover plate of the cabling cavity, as shown in Figure 3-107.Figure 3-107 Determining lengths of power cable for different operation2. Based on the determined lengths, remove the jacket and shielding layer from the powercable. Then, remove the jacket of a specified length from each wire, as shown in Figure3-108.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-86 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-108 Stripping the cable3. Add an OT terminal to each wire by referring to Assembling the OT Terminal and thePower Cable. Figure 3-109 shows the two OT terminals on the power cable.Figure 3-109 Two OT terminals on the power cable4. Remove about 15 mm jacket from the power cable. The shielding layer is exposed, as shownin Figure 3-110.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-87
Figure 3-110 Removing the jacket from the power cableCAUTIONThis step must be performed after the previous steps are complete. Otherwise, theexposed shielding layer would be distorted.Step 3 Remove the waterproof fillers from the cable troughs of the cabling cavity. Route the powercable along its dedicated cable trough. Figure 3-111 shows the cable troughs in the cablingcavity.Figure 3-111 Cable troughs in the cabling cavityStep 4 Open the cover over the terminals for the power cable, as shown in Figure 3-112.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-88 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-112 Opening the coverStep 5 Remove the screw on the strap labeled PGND. Figure 3-112 shows the strap for the power cable.Step 6 Press the strap on the exposed shielding layer of the power cable. Then, tighten the screw.Step 7 Connect the OT terminal on the blue –48 V DC wire to the terminal labeled NEG(-). Connectthe OT terminal on the black or brown GND wire to the terminal labeled RTN(+). Then, tightthe screws.Step 8 Close the cover.Step 9 Bind the –48 V DC power cable to the binding slot in the lower angle piece.NOTEYou can bind all the cables to the binding slots by using cable ties after connecting them in the cablingcavity.Step 10 Connect the other end of the power cable.1. Remove about 50 mm jacket from the power cable.2. Twist the shielding layer of the power cable into one strand, and then wrap the strand withthe heat-shrinkable tube of Ф5, as shown in Figure 3-113.CAUTIONDo not apply too much force lest the shielding layer be broken.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-89
Figure 3-113 Twisting the shielding layer into one strand3. Use a crimping connector to join the shielding layer and the PGND cable, as shown inFigure 3-114.CAUTIONlThe length of the PGND cable is 2 m at most, depending on the field requirements.lSpecial tools are required for crimping the OT terminals.lEnsure that the shielding layer is completely compressed in the crimping connector.NOTEIf the grounding point is less than 100 mm away from the external power supply, directly join theshielding layer and the cord end terminal. In this case, no crimping connector is required.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-90 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-114 Crimping the shielding layer and the PGND cable4. Add an OT terminal to the other end of the PGND cable. For details, refer to Assemblingthe OT Terminal and the Power Cable.5. Wrap the power cable with the heat-shrinkable tube of Ф14 at the point where the shieldinglayer is removed, as shown in Figure 3-115.Figure 3-115 Power cable with the heat-shrinkable tube6. Connect the PGND cable to the shielding grounding bar of the APM.7. Add OT terminals to the blue –48 V wire and the black GND wire, and then connect theOT terminals to the wiring terminals on the power supply.Step 11 Check whether the power cable of the SRXU needs to be installed.Condition ActionThe SRXU is installed. Go to Step 12 to install the power cable of the SRXU.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-91
Condition ActionNo SRXU is installed. Go to Step 14.Step 12 Fix the waterproof DB9 connector at one end of the SRXU power cable to the RET/PWR_SRXUport at the bottom of the RRU3804.Step 13 Fix the waterproof B9 connector at the other end of the SRXU power cable to the PWR_SRXUport at the bottom of the SRXU.Step 14 Label the power cable by referring to Labeling DBS3800 Cables.----End3.7.5 Installing the RF Jumper of the RRU3804/SRXUThe RF jumper of the RRU3804/SRXU is of two types: antenna jumper and interconnect jumper.The antenna jumper of the RRU3804/SRXU can be connected to the feeder or directly to theantenna. The interconnect jumper transmits RF signals between two RRU3804s/SRXUs.ContextIf the distance between the RRU3804/SRXU and the antenna is shorter than 14 m, use an antennajumper of fixed length to connect the RRU3804/SRXU and the antenna.For details of the connections of the RF jumpers in different networking modes, refer to 2.3.7.3RF Cable Connections of the RRU3804.NOTEUse a torque wrench to fasten the DIN connector to 27 N·m.ProcedurelUse the antenna jumper to connect the antenna and the RRU3804/SRXU.NOTEConnect the antenna jumper to the appropriate RF port according to the configurations.Table 3-2 Connecting the antenna jumper to the appropriate RF portCondition ActionOnly the RRU3804 is configured. Connect one end of the antenna jumper tothe RF port on the RRU3804.Both the RRU3804 and the SRXU areconfigured.Connect one end of the antenna jumper tothe RF port on the SRXU. 1. Determine the position to ground the jumper by referring to Location Requirementsfor Grounding the Feeder of the Mini Base Station.2. Install the grounding kit at the determined position by referring to Installing FeederGrounding Kits.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-92 Huawei Technologies Proprietary Issue 01 (2007-11-29)
3. Attach labels at the points 100 mm from each end of the antenna jumper by referringto Labeling the DBS3800 Antenna System.4. Fix the DIN connector of the antenna jumper to the appropriate RF port on theRRU3804/SRXU.5. Wrap the joint with the PVC insulating tape.NOTEWrap the joint spirally upwards, downwards, and then upwards again. In other words, the jointis wrapped with three layers of insulating tape. For every two adjacent tape layers, the tape onthe upper layer overlaps about half the width of the tape on the lower layer.6. Wrap the joint with the waterproof tape in the same way over the PVC insulating tape.Figure 3-116 shows the waterproofed joints.Figure 3-116 Waterproofed joints7. Mount the 50-ohm matched load on the idle RF port. Use the PVC insulating tape andwaterproof tape to wrap the joint between the matched load and the RF port in thesame way as described in the previous steps.lUse the antenna jumper to connect the feeder and the RRU3804/SRXU.1. Decide a proper length of the antenna jumper according to the real cabling.2. Connect one end of the antenna jumper to the feeder according to the configurations.3. Attach labels at the points 100 mm from each end of the antenna jumper by referringto Labeling the DBS3800 Antenna System.4. Connect the antenna jumper to the appropriate RF port according to the configurationsdescribed in Table 3-2.5. Connect the antenna jumper to the RRU3804/SRXU by referring to Step 4 throughStep 7 in the description about using the antenna jumper to connect the antenna to theRRU3804/SRXU.lUse the interconnect jumper to connect two RRU3804s/SRXUs.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-93
CAUTIONInterconnection between combined cabinets is implemented exclusively betweenRRU3804s or between SRXUs.1. Remove the dustproof cap from the RX_IN/OUT port at the bottom of each RRU3804/SRXU.2. Fix the 2W2 connectors at both ends of the interconnect jumper to the RX_IN/OUTports on the two RRU3804s/SRXUs respectively. Then, fasten the screws on theconnectors using a screwdriver.----End3.7.6 Installing the AISG Multi-Wire Cable of the RRU3804/SRXUThe AISG multi-wire cable connects the RRU3804/SRXU to the RCU.ProcedureStep 1 Fix the waterproof DB9 connector at one end of the AISG multi-wire cable to the appropriateport.Condition ActionOnly the RRU3804 is configured. Fix the waterproof DB9 connector to the RET/PWR_SRXU port at the bottom of the RRU3804.Both the RRU3804 and the SRXUare configured.Fix the waterproof DB9 connector to the RET port at thebottom of the SRXU. Step 2 Fix the AISG female connector at the other end of the cable to the AISG male connector of theAISG extension cable or that on the RCU.----End3.7.7 Installing the AISG Extension Cable of the RRU3804/SRXUIf the distance between the RRU3804/SRXU and the RCU is longer than 5 m, an AISG extensioncable is required.ProcedureStep 1 Fix the AISG male connector at one end of the AISG extension cable to the AISG femaleconnector of the AISG multi-wire cable.Step 2 Fix the AISG female connector at the other end to the AISG male connector on the RCU.----End3.7.8 Installing the Boolean/RS485 Input Cable of the RRU3804The Boolean/RS485 input cable monitors the external signals.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-94 Huawei Technologies Proprietary Issue 01 (2007-11-29)
ProcedureStep 1 Fit a protection tube onto the Boolean/RS485 input cable. Ensure that the cable reaches out ofthe protection tube in a proper length.Step 2 Fix the DB15 connector to the RS485/EXT_ALM on the cabling cavity of the RRU3804.Step 3 Remove the waterproof fillers from the cable troughs of the cabling cavity. Route the Boolean/RS485 input cable along its dedicated cable trough. Figure 3-117 shows the cable troughs inthe cabling cavity.Figure 3-117 Cable troughs in the cabling cavityStep 4 Bind the Boolean/RS485 input cable to the binding slot in the lower angle piece.NOTEYou can bind all the cables to the binding slots by using cable ties after connecting them in the cablingcavity.Step 5 Connect the other end of the Boolean/RS485 input cable depending on the configuration ofauxiliary devices at the site.Condition ActionNo SPD40R is used. Connect this end to the port for Boolean alarm signals or RS485 signalson the external equipment.An SPD40R is used. Connect this end to the SPD40R.For details about how to connect the Boolean/RS485 input cable to theSPD40R, refer to the SPD40R User Guide.Step 6 Waterproof both ends of the protection tube.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-95
Step 7 Label the Boolean/RS485 input cable by referring to Labeling DBS3800 Cables.----End3.7.9 Opening and Closing the Cover Plate of the RRU3804 CablingCavityBefore installing the –48 V DC power cable, CPRI optical cable, and Boolean input cable, youneed to open the cover plate of the RRU3804 cabling cavity. When the cables are connected tothe module, close the cover plate.3.7.9.1 Opening the Cover Plate of the RRU3804 Cabling CavityThis describes how to open the cover plate of the RRU3804 cabling cavity before installing the–48 V DC power cable, CPRI optical cable, and Boolean input cable.3.7.9.2 Closing the Cover Plate of the RRU3804 Cabling CavityThis describes how to close the cover plate of the RRU3804 cabling cavity after checking thehardware installation. Opening the Cover Plate of the RRU3804 Cabling CavityThis describes how to open the cover plate of the RRU3804 cabling cavity before installing the–48 V DC power cable, CPRI optical cable, and Boolean input cable.ProcedureStep 1 Loosen the six captive screws on the cabling cavity, as shown in Figure 3-118.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-96 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-118 Loosening the six captive screwsStep 2 Open the cover plate, as shown in Figure 3-119.Figure 3-119 Opening the cover plateRRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-97
CAUTIONWaterproof fillers are pre-installed in the cable troughs. Keep the idle fillers for later use.----End Closing the Cover Plate of the RRU3804 Cabling CavityThis describes how to close the cover plate of the RRU3804 cabling cavity after checking thehardware installation.ProcedureStep 1 Close the cover plate.Step 2 Tighten the screws in the order as shown in Figure 3-120.Figure 3-120 Tightening the screwsCAUTIONUse a torque wrench to fasten the screws to 14 N·m.----End3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-98 Huawei Technologies Proprietary Issue 01 (2007-11-29)
3.7.10 Opening and Closing the Cover Plate of the SRXU CablingCavityBefore installing the CPRI optical cable and PGND cable, you need to open the cover plate ofthe SRXU cabling cavity. When the cables are connected to the module, close the cover plate.3.7.10.1 Opening the Cover Plate of the SRXU Cabling CavityThis describes how to open the cover plate of the SRXU cabling cavity before installing theCPRI optical cable and PGND cable.3.7.10.2 Closing the Cover Plate of the SRXU Cabling CavityThis describes how to close the cover plate of the SRXU cabling cavity after checking thehardware installation. Opening the Cover Plate of the SRXU Cabling CavityThis describes how to open the cover plate of the SRXU cabling cavity before installing theCPRI optical cable and PGND cable.ProcedureStep 1 Loosen the six captive screws on the cabling cavity, as shown in Figure 3-121.Figure 3-121 Loosening the six captive screwsStep 2 Open the cover plate, as shown in Figure 3-122.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-99
Figure 3-122 Opening the cover plateCAUTIONWaterproof fillers are pre-installed in the cable troughs. Keep the idle fillers for later use.----End Closing the Cover Plate of the SRXU Cabling CavityThis describes how to close the cover plate of the SRXU cabling cavity after checking thehardware installation.ProcedureStep 1 Close the cover plate.Step 2 Tighten the screws in the order as shown in Figure 3-123.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-100 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Figure 3-123 Tightening the screwsCAUTIONUse a torque wrench to fasten the screws to 14 N·m.----End3.8 Checking RRU3804 and SRXU Hardware InstallationThis describes how to check the power-on status, hardware installation, and field cleanliness forthe RRU3804 and SRXU.PrerequisitelThe RRU3804 and SRXU hardware is installed.lThe power switch of the primary power supply to the RRU3804 and SRXU is set to OFF.ProcedureStep 1 Check RRU3804 and SRXU hardware installation by referring to 3.8.2 Checklist for RRU3804and SRXU Hardware Installation. Modify the items that fail to comply with the checklist untilthey meet the requirements.Step 2 Check the power-on status of the RRU3804 and SRXU by referring to 3.8.1 Checking thePower-On Status of the RRU3804 and SRXU.Step 3 Check field cleanliness by referring to 3.8.3 Checklist for Field Cleanliness of RRU3804 andSRXU Installation. Modify the items that fail to comply with the checklist until they meet therequirements.----EndRRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-101
3.8.1 Checking the Power-On Status of the RRU3804 and SRXUThis describes how to check the power-on status of the RRU3804 and SRXU through the inputvoltage and LED status.PrerequisitelThe power switch of the primary power supply to the RRU3804 and SRXU is set to OFF.ContextDANGERBefore powering on the equipment, set the power switches to OFF. This ensures bothpersonal and equipment safety.ProcedureStep 1 Measure the power supply voltage of the RRU3804 and SRXU. If DC power is used, the inputvoltage should range from –40 V DC to –60 V DC.Step 2 Turn on the power switch of the RRU3804 and SRXU.DANGERWhen powering on the RRU3804 and SRXU, do not look straight at the port on the ESFPoptical module if the transmission device is not installed.Step 3 Check the status of the RUN LED on the cabling cavity in three to five minutes.Status Description ActionON The module haspower input, yetthe module isfaulty.Power off the RRU3804 and SRXU. Clearthe fault, and then power on the RRU3804and SRXU again.OFF The module hasno power input, orthe module isfaulty.Power off the RRU3804 and SRXU andcheck the input power. If the input poweris normal, you need to clear the fault in theequipment and power on the RRU3804and SRXU again.1s ON, 1s OFF The module isrunning asconfigured.End the check.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-102 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Status Description Action0.5s ON, 0.5s OFF Software is beingloaded to themodule, or themodule is notconfigured.Wait until the software is loaded. If theloading does not end in five minutes,power off the RRU3804 and SRXU andcheck whether the data configuration fileis correct. After the fault is cleared, poweron the module again. ----End3.8.2 Checklist for RRU3804 and SRXU Hardware InstallationThis describes the checklists for equipment installation and cable connections.Checklist for Equipment InstallationTable 3-3 Checklist for equipment installationSN Item1The position of each equipment accords with the engineering design and meetsthe space requirement.2 For the RRU3804 in pole installation mode, the fixture assemblies are tightand steady, and the mounting plate is securely installed without any twist.3 For the RRU3804 in wall installation mode, the holes on the mounting plateare well aligned with those for expansion bolts, and the mounting plate isplaced against the wall securely and evenly.4 In wall installation modes, the RRU3804 is secure and steady.5 The cover plate is fastened to the cabling cavity of the RRU3804/SRXU.6 The empty cable troughs in the cabling cavity of the RRU3804/SRXU arewaterproofed.7 On the RRU3804/SRXU, the RF ports that are not connected with RF cablesare capped and waterproofed.8 The waterproof caps at the bottom of the module are bound with the cablesnearby.9 The housing is properly secured.10 When the RRU3804/SRXU is operational, the LEDs on the door of the ACSPD40R are ON and the door of the AC SPD40R is locked.11 The RRU3804/SRXU surface is clean and neat. The external paint issatisfactory.12 Labels, tags, and nameplates are correct, legible, and complete. RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-103
Checklist for Power Cable and PGND Cable ConnectionsTable 3-4 Checklist for the power cable and PGND cable connectionsSN Item1The PGND cables are yellow or green and yellow, the GND cables are blackor brown, and the –48 V power cables are blue.2 No power cable or PGND cable is short-circuited or reversely connected.3 The power cable and the PGND cable are separated from other cables.4 Labels are attached to both ends of the power cable and PGND cable.5 The power cable or the PGND cable is not scratched or broken.6 No joint lies in the middle of the power cable or the PGND cable.7 No breaking device such as switch and fuse lies in the electric connection ofthe grounding system.8 The redundant part of the power cable or PGND cable is stripped off ratherthan coiled.9 The lugs at both ends of the power cable or the PGND cable are securelysoldered or crimped.10 The bare wires and lug at the wiring terminals are tightly wrapped up by usinginsulating tapes or heat-shrink tubes.11 The flat washers and spring washers are well mounted to all wiring terminals.12 The working ground, protecting ground of the NodeB, and the lightningprotection ground of the building share one group of the grounding bodies. Checklist for Signal Cable ConnectionsTable 3-5 Checklist for signal cable connectionsSN Item1The connectors of signal cables are tight and secure.2 The connectors of signal cables are intact.3 Signal cables are not scratched or broken.4 Signal cables are neatly bound with ties installed at even intervals and to aproper tightness.5 Extra cable ties are cut off. All cuts are smooth without sharp projections.6 The cables layout facilitates maintenance and expansion.7 Both ends of each cable are correctly and clearly labeled.3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-104 Huawei Technologies Proprietary Issue 01 (2007-11-29)
3.8.3 Checklist for Field Cleanliness of RRU3804 and SRXUInstallationAfter the RRU3804 and SRXU is installed, you must check the field cleanliness for betterengineering quality.Table 3-6 Checklist for field cleanlinessSN Item1There are no unnecessary tapes, ties, wastepaper, or packing bags at the site.2 No fingerprints or other smears are left on the surfaces of the RRU3804, SRXU,and other related devices. 3.9 Installing the Housing of the RRU3804 and SRXUAfter the SRXU is fixed to the RRU3804, install the housing after checking the hardwareinstallation.ContextWhen loading the software and commissioning the module, you may need to check the operatingstatus of the module through the cover plate of the cabling cavity. Therefore, you can install thehousing after system commissioning.ProcedureStep 1 Install the housing by fitting the tabs into the anchor slots in the module, as shown in Figure3-124.RRU3804User Guide 3 Installing RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 3-105
Figure 3-124 Installing the housingStep 2 Use two bolts M6 x 14 to secure the housing, as shown in Figure 3-125.Figure 3-125 Securing the housing----End3 Installing RRU3804 and SRXU HardwareRRU3804User Guide3-106 Huawei Technologies Proprietary Issue 01 (2007-11-29)
4 Maintaining RRU3804 and SRXU HardwareAbout This ChapterAfter the RRU3804 and SRXU are deployed, accepted, and put into use, routine maintenanceis performed to ensure the functionality of the modules.4.1 Equipment Maintenance Items for the DBS3800The equipment maintenance items for the DBS3800 involve the fans, surface, cleanliness, andLEDs on the equipment.4.2 Powering On/Off the RRU3804/SRXUThis describes how to power on/off the module. During power-on, the status of the LEDs on themodule should be checked. If the SRXU is fixed to the RRU3804, the modules must be poweredon/off at the same time.4.3 Replacing an RRU3804This describes how to replace an RRU3804. The RRU3804, a remote radio unit, forms aDBS3800 system together with the BBU. Replacing an RRU3804 interrupts all the servicescarried by the RRU3804.4.4 Replacing an SRXUThis describes how to replace an SRXU. The SRXU is a remote radio unit that is used for capacityexpansion of the carriers. It forms a DBS3800 system together with other modules such asRRU3804 and BBU. Replacing an SRXU interrupts all the services carried by the SRXU andthe corresponding RRU3804.4.5 Replacing RRU3804 and SRXU CablesThis describes how to replace the cables of the RRU3804 and SRXU. The faulty cables must bereplaced in time. The cables that can be replaced are the transmission cables, signal cables, andRF cables.RRU3804User Guide 4 Maintaining RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 4-1
4.1 Equipment Maintenance Items for the DBS3800The equipment maintenance items for the DBS3800 involve the fans, surface, cleanliness, andLEDs on the equipment.Equipment Maintenance ItemsTable 4-1 describes the equipment maintenance items for the DBS3800.Table 4-1 Equipment maintenance items for the DBS3800Item Frequency Guidelines Reference StandardFan check (forthe BBU3806only)Weekly,monthly, orquarterlyCheck the fans. No alarm related to the fanis reported.Surface check Monthly orquarterlyCheck whether the surfaceof each equipment isimpaired and whether thelabel of each equipment islegible.-CleanlinesscheckMonthly orquarterlyCheck whether everyequipment is clean.The surface and inside ofthe equipment are clean.LED check Monthly orquarterlyCheck whether the LEDson each equipment arefunctional.For information of theLEDs, refer to DBS3800Hardware Description. 4.2 Powering On/Off the RRU3804/SRXUThis describes how to power on/off the module. During power-on, the status of the LEDs on themodule should be checked. If the SRXU is fixed to the RRU3804, the modules must be poweredon/off at the same time.4.2.1 Powering on the RRU3804/SRXUThis describes how to power on the RRU3804/SRXU. The RRU3804, supplied with –48 V DCpower, feeds power to the SRXU through a power cable.4.2.2 Powering off the RRU3804/SRXUThis describes how to power off the RRU3804/SRXU. The RRU3804/SRXU should be poweredoff if you need to move the equipment or anticipate a territorial blackout or if there is anemergency such as fire hazard, smoke, or water immersion.4.2.1 Powering on the RRU3804/SRXUThis describes how to power on the RRU3804/SRXU. The RRU3804, supplied with –48 V DCpower, feeds power to the SRXU through a power cable.4 Maintaining RRU3804 and SRXU HardwareRRU3804User Guide4-2 Huawei Technologies Proprietary Issue 01 (2007-11-29)
PrerequisiteEnsure that the input voltage to the RRU3804 stays within the range of –37 V DC to –60 V DC.ProcedureStep 1 Turn on the power switch of the external power supply to the RRU3804/SRXU.Step 2 Check the status of the LEDs on the cabling cavity of the RRU3804. Table 4-2 describes theLEDs and their status.Table 4-2 LEDs on the RRU3804LED Color Status DescriptionRUN Green ON The module has power input, yet themodule is faulty.OFF The module has no power input, orthe module is faulty.1s ON, 1s OFF The module is running as configured.0.5s ON, 0.5sOFFSoftware is being loaded to themodule, or the module is notconfigured.ALM Red ON The module is reporting alarms(excluding VSWR-related alarms).OFF The module is operational. Step 3 Check the status of the LEDs on the cabling cavity of the SRXU. Table 4-3 describes the LEDsand their status.Table 4-3 LEDs on the SRXULED Color Status DescriptionRUN Green ON The module has power input, yet themodule is faulty.OFF The module has no power input, orthe module is faulty.1s ON, 1s OFF The module is running as configured.0.5s ON, 0.5sOFFSoftware is being loaded to themodule, or the module is notconfigured.ALM Red ON The module is reporting alarms(excluding VSWR-related alarms).OFF The module is operational.RRU3804User Guide 4 Maintaining RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 4-3
Step 4 Perform the next step based on the status of the LEDs.Condition ActionThe RRU3804/SRXU is operational. End the power-on task.The RRU3804/SRXU is faulty. Clear the fault, and then go to Step 1. ----End4.2.2 Powering off the RRU3804/SRXUThis describes how to power off the RRU3804/SRXU. The RRU3804/SRXU should be poweredoff if you need to move the equipment or anticipate a territorial blackout or if there is anemergency such as fire hazard, smoke, or water immersion.ProcedureTurn off the power switch of the external power supply to the RRU3804/SRXU.----End4.3 Replacing an RRU3804This describes how to replace an RRU3804. The RRU3804, a remote radio unit, forms aDBS3800 system together with the BBU. Replacing an RRU3804 interrupts all the servicescarried by the RRU3804.PrerequisitelThe quantity and models of the faulty RRU3804s are checked, and new RRU3804s areready.lThe installation position of each RRU3804 is recorded.lThe position of each screw on the RRU3804s is recorded.lThe connections of each RRU3804 cable are recorded.lThe tool kit is ready.ContextIt takes about 30 minutes to replace an RRU3804. The time covers the activities of disconnectingthe cables from the faulty RRU3804, connecting the cables to the new RRU3804, and resumingthe services.CAUTIONWear an ESD wrist strap or ESD gloves when performing the operation.4 Maintaining RRU3804 and SRXU HardwareRRU3804User Guide4-4 Huawei Technologies Proprietary Issue 01 (2007-11-29)
ProcedureStep 1 Remove the housing of the RRU3804.NOTEIf the SRXU is fixed to the RRU3804, you also need to remove the SRXU. For details, refer to 4.4 Replacingan SRXU.Step 2 Power off the RRU3804. For details, refer to 4.2.2 Powering off the RRU3804/SRXU.Step 3 Disconnect all the cables from the faulty RRU3804 and take appropriate insulation measuresfor the cables.Step 4 Remove the two screws M6 x 20 at the bottom of the mounting plate.NOTEIf the RRU3804 to be replaced is the right one in two-module centralized mode or the middle one in three-module centralized mode, you also need to remove the multi-purpose attachment plate at the bottom of themounting plate. The right RRU3804 in two-module centralized mode is installed in ordinary mode.Step 5 Unhitch the tabs on the attachment plate from the anchor slots in the mounting plate. Then,remove the RRU3804.Step 6 Remove the three screws M6 x 20 that fasten the attachment plate.Step 7 Take out a new RRU3804.Step 8 Use the three screws M6 x 20 to secure the attachment plate on the new RRU3804.Step 9 Install the RRU3804 module by fitting the tabs on the attachment plate into the anchor slots inthe mounting plate.Step 10 Use the two screws M6 x 20 to secure the RRU3804 on the mounting plate.Step 11 Connect all the cables to the new RRU3804.NOTEIf the SRXU is fixed to the RRU3804, you also need to install the SRXU. For details, refer to 3.6 Installingthe SRXU. Then, connect all the cables to the new RRU3804.Step 12 Power on the RRU3804. For details, refer to 4.2.1 Powering on the RRU3804/SRXU.Step 13 Install the housing.----EndPostrequisiteAfter replacing the faulty RRU3804, check the following items:lThe new RRU3804 is properly installed.lAll the cables on the new RRU3804 are properly connected.lEach screw on the new RRU3804 is installed in the correct position and all screws arefastened.lThe new RRU3804 is functional after being powered on.Contact the Huawei local office to handle the faulty RRU3804.RRU3804User Guide 4 Maintaining RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 4-5
4.4 Replacing an SRXUThis describes how to replace an SRXU. The SRXU is a remote radio unit that is used for capacityexpansion of the carriers. It forms a DBS3800 system together with other modules such asRRU3804 and BBU. Replacing an SRXU interrupts all the services carried by the SRXU andthe corresponding RRU3804.PrerequisitelThe quantity and models of the faulty SRXUs are checked, and new SRXUs are ready.lThe installation position of each SRXU is recorded.lThe position of each screw on the SRXUs is recorded.lThe connections of each SRXU cable are recorded.lThe tool kit is ready.ContextIt takes about 30 minutes to replace an SRXU. The time covers the activities of disconnectingthe cables from the faulty SRXU, connecting the cables to the new SRXU, and resuming theservices.CAUTIONWear an ESD wrist strap or ESD gloves when performing the operation.ProcedureStep 1 Remove the housing.Step 2 Power off the SRXU. For details, refer to 4.2.2 Powering off the RRU3804/SRXU.Step 3 Disconnect all the cables from the faulty SRXU and take appropriate insulation measures forthe cables.Step 4 Remove the two screws M6 x 20.Step 5 Separate the SRXU from the RRU3804.Step 6 Take out a new SRXU.Step 7 Install the new SRXU in its original position.Step 8 Use the two screws M6 x 20 to secure the SRXU on the RRU3804.Step 9 Connect all the cables to the new SRXU.Step 10 Power on the SRXU. For details, refer to 4.2.1 Powering on the RRU3804/SRXU.Step 11 Install the housing.----End4 Maintaining RRU3804 and SRXU HardwareRRU3804User Guide4-6 Huawei Technologies Proprietary Issue 01 (2007-11-29)
PostrequisiteCheck the following items after replacing the faulty SRXU:lThe new SRXU is properly installed.lAll the cables on the new SRXU are properly connected.lEach screw on the new SRXU is installed in the correct position and all screws are fastened.lThe new SRXU is functional after being powered on.Contact the Huawei local office to handle the faulty SRXU.4.5 Replacing RRU3804 and SRXU CablesThis describes how to replace the cables of the RRU3804 and SRXU. The faulty cables must bereplaced in time. The cables that can be replaced are the transmission cables, signal cables, andRF cables.ContextNOTEContact Huawei engineers for confirmation if:lYou choose to prepare the devices, cables, and connectors by yourself.lYou need to cut the cable in specified length.4.5.1 Replacing the CPRI Optical CableReplacing the optical cable interrupts the services carried over the cable.4.5.2 Replacing the RF Jumper of the RRU/SRXUThe RF jumper of the RRU/SRXU is of two types: feeder jumper and interconnect jumper. Youshould power off the RRU/SRXU before replacing the RF jumper.4.5.3 Replacing the AISG Multi-Wire Cable of the RRU/SRXUThe AISG multi-wire cable connects the RRU/SRXU to the Remote Control Unit (RCU). Youshould power off the RRU/SRXU before replacing the AISG multi-wire cable.4.5.4 Replacing the AISG Extension Cable of the RRU/SRXUIf the distance between the RRU/SRXU and the RCU is too long for the AISG multi-wire cableto connect the two devices, an AISG extension cable should be used. You should power off theRRU/SRXU before replacing the AISG extension cable.4.5.1 Replacing the CPRI Optical CableReplacing the optical cable interrupts the services carried over the cable.PrerequisitelThe quantity and types of the faulty optical cables are confirmed, and new optical cablesare ready.lThe new cables are in good condition. Damaged cables cannot be used.lThe connections of each optical cable are recorded.RRU3804User Guide 4 Maintaining RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 4-7
lThe tools and materials are ready. The tools and materials are the ESD wrist strap or gloves,cross screwdriver, straight screwdriver, ESD box or bag, dustfree cotton cloth, fiber cleaner,and key to the cabinet.ContextIt takes about five minutes to replace a CPRI optical cable. The time covers the activities ofremoving the faulty optical cable, installing the new optical cable, and recovering the CPRI links.CAUTIONWear an ESD wrist strap or a pair of ESD gloves when performing the operation.CAUTIONDo not point the optical cable at your eyes after removing the connector of the optical cablefrom the optical module.ProcedureStep 1 Lead the new CPRI optical cable to the peer device along the route of the faulty cable.Step 2 Press the latch on the connector of the faulty optical cable. Then pull the connector out of theoptical module.Step 3 Put the faulty optical cable into an ESD box.Step 4 Plug the connector of the new optical cable into the same optical module according to the labelon the optical cable.Step 5 Bind the new optical cable.----EndPostrequisiteCheck the following items after replacing the faulty CPRI optical cable:lThe new optical cable is well installed and its type is correct.lOn the M2000 or LMT, the related alarms are cleared.Contact the Huawei local office to handle the faulty optical cable.4.5.2 Replacing the RF Jumper of the RRU/SRXUThe RF jumper of the RRU/SRXU is of two types: feeder jumper and interconnect jumper. Youshould power off the RRU/SRXU before replacing the RF jumper.4 Maintaining RRU3804 and SRXU HardwareRRU3804User Guide4-8 Huawei Technologies Proprietary Issue 01 (2007-11-29)
PrerequisitelThe quantity and models of the faulty RF jumpers are confirmed and new RF jumpers areready.lThe tools and materials are ready. The tools and materials are the key to the RRU/SRXUhousing, ESD gloves, and screwdriver.ContextThe RF jumper of the RRU/SRXU is of two types: feeder jumper and interconnect jumper.lThe feeder jumper inputs and outputs RF signals.lThe interconnect jumper transmits RF signals between two RRU/SRXUs.CAUTIONWear an ESD wrist strap or ESD gloves when performing the operation.ProcedureStep 1 Remove the housing.Step 2 Turn off the power switch of the RRU/SRXU.NOTEThis step is omitted in replacing the RF Jumper of the RRU3804/SRXU.Step 3 Remove the faulty RF jumper from the RF port on the RRU/SRXU.Step 4 Remove the faulty RF jumper from the RF port on the antenna system.Step 5 Fix the waterproof connector of the new RF jumper to the RF port on the RRU/SRXU.Step 6 Wrap the joint with the PVC insulating tape.NOTEWrap the joint spirally upwards, downwards, and then upwards again. In other words, the joint is wrappedwith three layers of insulating tape. For every two adjacent tape layers, the tape on the upper layer overlapsabout half the width of the tape on the lower layer.Step 7 Wrap up the waterproof tape with the PVC insulating tape in the same way.Step 8 Mount the 50-ohm matched load on the idle RF port. Use the PVC insulating tape and waterprooftape to wrap the joint between the matched load and the RF port in the same way as describedin the previous steps.Step 9 Connect the RF jumper to the antenna system.Step 10 Turn on the power switch of the RRU/SRXU.NOTEThis step is omitted in replacing the RF Jumper of the RRU3804/SRXU.Step 11 Install the housing after ensuring that the RRU/SRXU is operational.----EndRRU3804User Guide 4 Maintaining RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 4-9
PostrequisiteCheck the following items after replacing the faulty RF jumper:lThe RF jumper is tightly connected to the antenna system.lThe RF jumper is tightly connected to the RRU/SRXU.lThe RRU/SRXU is operational after being powered on.Contact the Huawei local office to handle the faulty RF jumper.4.5.3 Replacing the AISG Multi-Wire Cable of the RRU/SRXUThe AISG multi-wire cable connects the RRU/SRXU to the Remote Control Unit (RCU). Youshould power off the RRU/SRXU before replacing the AISG multi-wire cable.PrerequisitelThe quantity of faulty AISG multi-wire cables is confirmed, and new AISG multi-wirecables are ready.lThe tools and materials are ready. The tools and materials are the key to the RRU/SRXUhousing, ESD gloves, and screwdriver.ContextOne end of the AISG multi-wire cable is a waterproof DB9 connector, and the other end is astandard 8-pin AISG female connector.CAUTIONWear an ESD wrist strap or ESD gloves when performing the operation.ProcedureStep 1 Remove the housing.Step 2 Turn off the power switch of the RRU/SRXU.NOTEThis step is omitted in replacing the AISG multi-wire cable of the RRU3804 or SRXU.Step 3 Remove the waterproof DB9 connector of the faulty AISG multi-wire cable from the RET porton the RRU/SRXU.Step 4 Install the new AISG multi-wire cable. Reference about the installation of a new AISG multi-wire cable is based on the actual configuration of the RRUs.Condition ActionThe RRU3801C is configured. Refer to Installing the AISG Multi-Wire Cable ofthe RRU3801C.4 Maintaining RRU3804 and SRXU HardwareRRU3804User Guide4-10 Huawei Technologies Proprietary Issue 01 (2007-11-29)
Condition ActionThe RRU3804/SRXU is configured. Refer to 3.7.6 Installing the AISG Multi-Wire Cableof the RRU3804/SRXU.Step 5 Turn on the power switch of the RRU/SRXU.Step 6 Install the housing after ensuring that the RRU/SRXU is operational.----EndPostrequisiteCheck the following items after replacing the faulty AISG multi-wire cable:lThe AISG multi-wire cable is tightly connected to the RCU.lThe RRU/SRXU is operational after being powered on.Contact the Huawei local office to handle the faulty AISG multi-wire cable.4.5.4 Replacing the AISG Extension Cable of the RRU/SRXUIf the distance between the RRU/SRXU and the RCU is too long for the AISG multi-wire cableto connect the two devices, an AISG extension cable should be used. You should power off theRRU/SRXU before replacing the AISG extension cable.PrerequisitelThe quantity of the faulty AISG extension cables is confirmed, and new AISG extensioncables are ready.lThe tools and materials are ready. The tools and materials are the key to the RRU/SRXUhousing, ESD gloves, and screwdriver.ContextCAUTIONWear an ESD wrist strap or ESD gloves when performing the operation.ProcedureStep 1 Remove the housing.Step 2 Turn off the power switch of the RRU/SRXU.NOTEThis step is omitted in replacing the AISG extension cable of the RRU3804 or SRXU.Step 3 Remove the AISG female connector of the faulty AISG extension cable from the AISG maleconnector on the RCU.RRU3804User Guide 4 Maintaining RRU3804 and SRXU HardwareIssue 01 (2007-11-29) Huawei Technologies Proprietary 4-11
Step 4 Remove the AISG female connector of the AISG multi-wire cable from the AISG male connectorof the faulty AISG extension cable.Step 5 Fix the AISG male connector of the new AISG extension cable to the AISG female connectorof the AISG multi-wire cable.Step 6 Fix the AISG female connector of the new AISG extension cable to the AISG male connectoron the RCU.Step 7 Turn on the power switch of the RRU/SRXU.Step 8 Install the housing after ensuring that the RRU/SRXU is operational.----EndPostrequisiteCheck the following items after replacing the faulty AISG extension cable:lThe AISG multi-wire cable to the RRU/SRXU is tightly connected to the AISG extensioncable.lThe AISG extension cable is tightly connected to the RCU.lThe RRU/SRXU is operational after being powered on.Contact the Huawei local office to handle the faulty AISG extension cable.4 Maintaining RRU3804 and SRXU HardwareRRU3804User Guide4-12 Huawei Technologies Proprietary Issue 01 (2007-11-29)
IndexCcable requirementcabling specificationgeneral cabling specification, 3-78special cabling specification, 3-78CPRI optical cableBBU3806-RRU, 2-20, 2-31BBU3806C-RRU, 2-21Eequipment maintenance item, 4-2Iinstallationtool and instrument, 3-13Pproduct family, 2-2RreplacingAISG extension cable, 4-11AISG multi-wire cable, 4-10CPRI optical cable, 4-7RF jumper, 4-8RRU3804dimension, 2-10power consumption, 2-10power input, 2-10weight, 2-10SSRXUdimension, 2-15power consumption, 2-15weight, 2-15Uunpacking, 3-12RRU3804User Guide IndexIssue 01 (2007-11-29) Huawei Technologies Proprietary i-1

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