DBS3900 V100R005C00 RRU3252/RRU3256 Installation Guide Issue Draft A Date 2012-11-30 HUAWEI 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 written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
DBS3900 RRU3252/RRU3256 Installation Guide About This Document About This Document Purpose This document describes the process of installing a DC RRU3252/RRU3256 (referred to as RRU in this document). Product Version The following table lists the product version related to this document.
DBS3900 RRU3252/RRU3256 Installation Guide About This Document 5 Installation Process The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU. 6 Hoisting the RRU and Cables onto a Tower This section describes how to hoist the RRU and Cables onto a tower and provides important notes about the installation. 7 Installing the RRU This chapter describes the procedure for installing the RRU.
DBS3900 RRU3252/RRU3256 Installation Guide About This Document General Conventions The general conventions that may be found in this document are defined as follows. Convention Description Times New Roman Normal paragraphs are in Times New Roman. Boldface Names of files, directories, folders, and users are in boldface. For example, log in as user root. Italic Book titles are in italics. Courier New Examples of information displayed on the screen are in Courier New.
DBS3900 RRU3252/RRU3256 Installation Guide About This Document Keyboard Operations The keyboard operations that may be found in this document are defined as follows. Format Description Key Press the key. For example, press Enter and press Tab. Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt +A means the three keys should be pressed concurrently. Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means the two keys should be pressed in turn.
DBS3900 RRU3252/RRU3256 Installation Guide Contents Contents About This Document.....................................................................................................................ii 1 Change History..............................................................................................................................1 2 Installation Preparations..............................................................................................................2 2.1 Reference Documents....
DBS3900 RRU3252/RRU3256 Installation Guide Contents 8 Installing RRU Cables................................................................................................................65 8.1 Cabling Requirements......................................................................................................................................67 8.2 Cable Connections..........................................................................................................................................
DBS3900 RRU3252/RRU3256 Installation Guide 1 Change History 1 Change History This chapter describes changes in the RRU3252/RRU3256 Installation Guide. Draft A (2012-11-30) This is a draft. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 2 Installation Preparations 2 Installation Preparations About This Chapter This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills that installation engineers must have. 2.1 Reference Documents Before the installation, you must be familiar with reference documents. 2.
DBS3900 RRU3252/RRU3256 Installation Guide 2 Installation Preparations 2.1 Reference Documents Before the installation, you must be familiar with reference documents. The following reference documents are required during RRU installation: l RRU3252/RRU3256 Hardware Description l DBS3900 Installation Guide l OCB-01M User Guide This document describes the RRU installation on a pole, U-steel, angle steel, or wall.
DBS3900 RRU3252/RRU3256 Installation Guide 2 Installation Preparations Adjustable wrench (capacity ≥ 32 mm) Torque screwdriver Torque wrench 5 mm Capacity: 17 mm, 21 mm, and 32 mm (M3 to M6) Torque socket Combination wrench (M3 to M6) Capacity: 17 mm, 21 mm, and 32 mm Multimeter Marker (diameter ≤ 10 mm) Measuring tape 2.3 Skills and Requirements for Onsite Personnel Onsite personnel must be qualified and trained.
DBS3900 RRU3252/RRU3256 Installation Guide 3 3 Information About the Installation Information About the Installation About This Chapter Before installing an RRU, you must be familiar with its exterior, ports, installation options, physical supports, and installation clearance requirements. 3.1 RRU Exterior This section describes the exterior and dimensions of an RRU. 3.2 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. 3.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation 3.1 RRU Exterior This section describes the exterior and dimensions of an RRU. Figure 3-1 shows an RRU. Figure 3-1 RRU exterior Figure 3-2 shows RRU dimensions. Figure 3-2 RRU dimensions Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation 3.2 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 3-3 shows the ports on the RRU panels. Figure 3-3 Ports on the RRU panels Table 3-1 describes ports and indicators on the RRU panels. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Table 3-1 Ports and indicators on the RRU panels Item Label Description (1) Ports at the bottom ANT0-ANT3 TX/RX ports. ANT0 port supports RET signal transmission. RET/EXT_ALM Communication port for the RET antenna or port for alarm reporting, supporting RET signal transmission RGPS RGPS port, which is optional.
DBS3900 RRU3252/RRU3256 Installation Guide Label ALM ACT VSWR CPRI0/ IR0 CPRI1/ IR1 Issue Draft A (2012-11-30) Color Red Green Red Red or green Red or green 3 Information About the Installation Status Description Blinking on for 1s and off for 1s The module is working properly. Blinking on for 0.125s and off for 0.125s Software is being loaded to the module, or the module is not started. Steady on Alarms are generated, and the module must be replaced.
DBS3900 RRU3252/RRU3256 Installation Guide Label Color 3 Information About the Installation Status Description Blinking red on for 1s and off for 1s The CPRI link is out of lock possibly because of mutual lock of dual-mode clock sources or mismatched data rates over CPRI ports. (You are advised to check the system configuration to rectify the fault.) Steady off The SFP module is not properly installed, or the optical module is powered off. 3.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-5 shows an RRU installed on a pole. Figure 3-5 RRU installed on a pole Installing an RRU on U-steel CAUTION l You are advised to install only one RRU on the same U-steel or angle steel. l The angle between the vertical plane and the pole, angle steel, or U-steel must be smaller than or equal to 10°, as shown in Figure 3-6.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-6 Requirement of the angle between the ground and the pole, angle steel, or U-steel (1) RRU (2) Pole, angle steel, or U-steel Figure 3-7 shows U-steel specifications. Figure 3-7 U-steel specifications Figure 3-8 shows an RRU installed on U-steel. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-8 RRU installed on U-steel Installing an RRU on Angle Steel Figure 3-9 shows angle steel specifications. Figure 3-9 Angle steel specifications CAUTION l It is recommended that only one RRU be installed on one angle steel. l The vertical deviation angle of angle steel must be less than or equal to 10°, as shown in Figure 3-6. Figure 3-10 shows an RRU installed on angle steel.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-10 RRU installed on angle steel Installing an RRU on a Wall The wall on which RRUs are installed must meet the following requirements: l When a single RRU is installed, the wall has a capacity of bearing at least four times the weight of the RRU. l Expansion bolts must be tightened with a torque of 30 N·m (265.52 lbf·in.) to ensure the bolts work properly and the wall remains intact without cracks in it.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-11 RRU installed on a wall 3.5 Installation Clearance Requirements of an RRU This section describes the requirements for the installation clearance of a single RRU and multiple RRUs and the requirements for the installation spacing between RRUs. NOTE The recommended installation clearance ensures normal running and provides an appropriate space for OM.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-12 Recommended clearance for a single RRU Minimum Clearance for a Single RRU Figure 3-13 shows the minimum clearance for a single RRU. Figure 3-13 Minimum clearance for a single RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Minimum Clearance for a Single RRU Installed on a Tower Figure 3-14 shows the minimum clearance for a single RRU installed on a tower. Figure 3-14 Minimum clearance for a single RRU installed on a tower 3.5.2 Clearance for Multiple RRUs This section describes the recommended and minimum clearance for multiple RRUs.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-15 Recommended clearance for multiple RRUs installed in centralized mode Minimum Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-16 shows the minimum clearance for multiple RRUs installed in centralized mode. Figure 3-16 Minimum clearance for multiple RRUs installed in centralized mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Recommended clearance for multiple RRUs installed on a wall in standard mode Figure 3-17 shows the recommended clearance for multiple RRUs installed on a wall in standard mode.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Recommended Clearance for Multiple RRUs Side-Mounted on a Wall Figure 3-19 shows the recommended clearance for multiple RRUs side-mounted on a wall. Figure 3-19 Recommended clearance for multiple RRUs side-mounted on a wall 3.5.3 Spacing Between RRUs This section describes the horizontal and vertical installation spacing between RRUs.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Minimum horizontal spacing between RRUs Figure 3-21 shows the minimum horizontal spacing between RRUs. Figure 3-21 Minimum horizontal spacing between RRUs Recommended vertical spacing between RRUs Figure 3-22 shows the recommended vertical spacing between RRUs. Figure 3-22 Recommended vertical spacing between RRUs Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Minimum vertical spacing between RRUs Figure 3-23 shows the minimum vertical spacing between RRUs. Figure 3-23 Minimum vertical spacing between RRUs Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 4 Unpacking the Equipment 4 Unpacking the Equipment This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact. Context NOTE When transporting, moving, or installing the equipment, components, or parts, you must: l Prevent them from colliding with doors, walls, shelves, or other objects.
DBS3900 RRU3252/RRU3256 Installation Guide 4 Unpacking the Equipment If ... Then ... The outer packing is intact Go to Step 3. The outer packing is severely damaged or Find out the cause and report it to the local soaked Huawei office. The shockwatch label is red Stop unpacking the wooden crate, and then report it to the transportation company. Step 3 Check the type and quantity of the equipment in the cases according to the packing list. If ... Then ...
DBS3900 RRU3252/RRU3256 Installation Guide 5 Installation Process 5 Installation Process The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU. Figure 5-1 shows the process of installing an RRU. Figure 5-1 Process of installing an RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 6 6 Hoisting the RRU and Cables onto a Tower Hoisting the RRU and Cables onto a Tower About This Chapter This section describes how to hoist the RRU and Cables onto a tower and provides important notes about the installation. 6.1 Hoisting an RRU onto a Tower This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenario, the RRU can be installed on a pole, U-steel, or angle steel. 6.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 6.1 Hoisting an RRU onto a Tower This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenario, the RRU can be installed on a pole, U-steel, or angle steel. Prerequisites Place a foam pad or cardboard on the ground to protect the housing of the RRU from damage before the binding.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-1 Hoisting the RRU onto the tower (1) Lifting sling (2) Fixed pulley (3) Traction sling 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley. 2.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-3 Binding the RRU (1) Lifting sling (2) Lifting eye (3) Traction sling (4) Handle CAUTION l The load-bearing capacity of each sling must be greater than 200 kg (441 lb) and the diameter of each sling must be less than 25 mm (0.98 in.). The angle at the top of the lifting sling [by the knot] must not be greater than 60 degrees.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-4 Incorrect binding method Figure 6-5 Incorrect binding method 3. Installation engineer B pulls the lifting sling downwards, and installation engineer C pulls the traction sling outwards to protect the RRU from colliding with the tower. Step 2 Installation engineer A catches the RRU, install the RRU on the main bracket until the RRU snaps shut. Step 3 Remove the lifting sling and traction sling.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 6.2 Hoisting Fiber Optic Cables onto a Tower This section describes the procedure for hoisting fiber optic cables onto a tower and the precautions that must be taken. Context Cabling requirements for power cables are met. For details, see Cabling Requirements. Procedure Step 1 Hoist the fiber optic cables onto the tower, as shown in Figure 6-6.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley. 2.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-8 Incorrect binding method 3. Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m (49.21 ft) per minute to coil the fiber optic cables. 4. Installation engineer C pulls the lifting sling downwards, and installation engineer D pulls the traction sling outwards to protect the fiber optic cables from colliding with the tower.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-9 Hoisting power cables onto the tower (1) Lifting sling (2) Fixed pulley 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley. 2. Installation engineer B secures three cable ties to the power cable connector, and then secures the power cable to the lifting sling, as shown in Figure 6-10.
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-10 Binding cable ties 3. Installation engineer B wraps the power cable connector with a layer of PVC insulation tape, as shown in Figure 6-11. NOTE Wrap the PVC insulation tape from 30 mm (1.18 in.) away from one end of the connector until it reaches the other end of the connector. The total length of the wrapped connector is 100 mm (3.94 in.).
DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-11 Wrapping the PVC insulation tape 4. Installation engineer C pulls the lifting sling downwards, and installation engineer B pulls the other end of the lifting sling outwards to protect the power cables from colliding with the tower. Step 2 Secure the power cables to the tower vertically using cable clips. Step 3 Remove the cable ties, PVC insulation tape, and lifting sling.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU 7 Installing the RRU About This Chapter This chapter describes the procedure for installing the RRU. The RRU can be installed on a pole, U-steel, angle steel, or wall as required. CAUTION l Do not stand the RRU upright because the load-bearing capacity of the RF ports at the RRU bottom is low. l Place a foam pad or cardboard under an RRU to protect the RRU housing from damage during the installation. 7.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU 7.1 Mounting Kits for an RRU This section describes the bracket assembly and the attachment plate for an RRU. Figure 7-1 shows the bracket assembly for an RRU. Figure 7-1 Bracket assembly for an RRU (1) Plastic screw cap (2) M10 nut (3) Spring washer (5) M10x150 bolt (7) Hoist clamp on the main (8) Main mounting bracket mounting bracket (6) Auxiliary mounting bracket (4) Flat washer Figure 7-2 shows the rear view of an RRU.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-3 Single RRU installed on a pole Figure 7-4 shows two RRUs installed on a pole. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-4 Two RRUs installed on a pole NOTE If two RRUs are installed on a pole, the minimum distance between the two sets of mounting kits is the height of an RRU. Figure 7-5, Figure 7-6, and Figure 7-7 show multiple RRUs installed on a pole. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-5 Three RRUs installed on a pole in centralized mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-6 Four RRUs installed on a pole in centralized mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-7 Six RRUs installed on a pole in centralized mode 7.2.1 Installing a Single RRU This section describes the procedure for installing a single RRU on a pole and the precautions that must be taken during the installation. Prerequisites Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.
DBS3900 RRU3252/RRU3256 Installation Guide l 7 Installing the RRU If the RRU must be installed on the ground, see Figure 7-8 to determine a position. Figure 7-8 Distance between the main mounting bracket and the ground Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally remove one end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and then disassemble the mounting kits, as shown in Figure 7-9.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Step 4 To secure the bracket assembly to the pole, use a torque wrench with an aperture of 16 mm (0.67 in.) to tighten the two M10 nuts with a torque of 40 N·m (354.03 lbf·in.), as shown in Figure 7-11. Figure 7-11 Securing the bracket assembly (1) Plastic screw cap NOTE Do not remove the plastic screw caps from the bolts on the mounting kits.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-12 Installing the RRU on the main mounting bracket ----End 7.2.2 Installing Two RRUs This section describes the procedure for installing two RRUs on a pole and the precautions that must be taken during the installation. Procedure Step 1 Install the first RRU, as shown in Figure 7-13. For details, see 7.2.1 Installing a Single RRU.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Step 2 Install the second set of mounting kits, The distance between the two sets of mounting kits must equal the height of an RRU. Step 3 Remove the attachment plate from the rear of the second RRU and then install it on the RRU front, as shown in Figure 7-14. Figure 7-14 Removing the attachment plate from the rear of the second RRU and then installing it on the RRU front 1.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-15 Installing the second RRU on the main mounting bracket (1) RRU installed in standard mode (2) RRU installed in reverse mode (3) Cabling cavity ----End 7.2.3 Installing Multiple RRUs This section describes the procedure for installing multiple remote radio units (RRUs) on a pole and the precautions that must be taken during the installation. Context Three, four, or six RRUs can be installed on a pole.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-16 Removing an attachment plate from the RRU rear and installing it on one side of the RRU 1. Use an inner hexagon screwdriver to remove the attachment plate from the RRU rear. 2. Install the attachment plate on one side of the RRU, and use a torque screwdriver to tighten the stainless steel screws on the attachment plate with a torque of 5 N·m (44.25 lbf·in.).
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-18 Installing the second main mounting bracket Step 5 Install the second RRU on the second main mounting bracket, as shown in Figure 7-19. Figure 7-19 Installing the second RRU on the main mounting bracket Step 6 Install the third main mounting bracket and the third RRU, as shown in Figure 7-20. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-20 Installing the third RRU on the main mounting bracket Step 7 Install the second set of mounting kits, as shown in Figure 7-21. The minimum distance between the two sets of mounting kits is the height of an RRU. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-21 Installing the second set of mounting kits Step 8 Install the fourth RRU on the main mounting bracket of the second set of mounting kits, as shown in Figure 7-22. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-22 Installing the fourth RRU on the main mounting bracket ----End 7.3 Installing the RRU on U-Steel This section describes the procedure for installing the RRU on U-steel and the precautions that must be taken during the installation. The RRU installed on U-steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on U-steel.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-23 Top view of the RRU (1) U-steel NOTE If the length of the narrow side of U-steel is less than 40 mm (1.57 in.), install an RRU in mode a or mode b shown in Figure 7-23. Procedure Step 1 Determine a position for installing the main mounting bracket. l If the RRU is to be installed on a tower, determine the position for installing the main mounting bracket by referring to 3.5.1 Clearance for a Single RRU.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU NOTE It is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above the ground. Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally remove one end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and then disassemble the mounting kits, as shown in Figure 7-25.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-27 Securing the bracket assembly (1) Plastic screw cap Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-28. Figure 7-28 Installing the RRU on the main mounting bracket Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU ----End 7.4 Installing the RRU on Angle Steel This section describes the procedure for installing the RRU on angle steel and the precautions that must be taken during the installation. The RRU installed on angle steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on angle steel. Prerequisites Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-30 Distance between the main mounting bracket and the ground NOTE It is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above the ground. Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally remove one end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and then disassemble the mounting kits, as shown in Figure 7-31.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-32 Bracket assembly installed on angle steel Step 4 To secure the bracket assembly to the angle steel, use a torque wrench with an aperture of 16 mm (0.67 in.) to tighten the two M10 nuts with a torque of 40 N·m (354.03 lbf·in.), as shown in Figure 7-33. Figure 7-33 Securing the bracket assembly (1) Plastic screw cap Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-34.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-34 Installing the RRU on the main mounting bracket ----End 7.5 Installing the RRU on a Wall This section describes the procedure for installing the RRU on a wall and the precautions that must be taken during the installation. Prerequisites The hoist clamp on the main mounting bracket is secured properly.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-35 Marking the anchor points (1) Main mounting bracket (2) RRU NOTE It is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above the ground. Figure 7-36 Expansion bolt assembly (1) M8x85 bolt (2) Spring washer 8 (3) Plastic tube (4) Flat washer 8 (5) Expansion tube Step 3 Drill holes at the anchor points, and then install expansion bolt assemblies, as shown in Figure 7-37.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-37 Drilling a hole and installing an expansion bolt assembly 1. Use a hammer drill with a φ12 bit to drill holes vertically at the marked anchor points. Ensure that the depth of each hole ranges from 55 mm to 60 mm (2.17 in. to 2.36 in.). WARNING Take proper safety measures to protect your eyes and respiratory tract against the dust before drilling holes. 2.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-38 Securing the main mounting bracket to a wall (1) M8x85 expansion bolts (2) Spring washers (3) Flat washers Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-39. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-39 Installing the RRU ----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8 Installing RRU Cables About This Chapter This chapter describes the procedure for installing RRU cables. 8.1 Cabling Requirements Cables must be routed according to the specified cabling requirements to prevent signal interference. 8.2 Cable Connections This section describes the cable connections for a single RRU and multiple RRUs. 8.3 Installation Process This section describes the process of installing RRU cables. 8.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8.1 Cabling Requirements Cables must be routed according to the specified cabling requirements to prevent signal interference. NOTE If a cable listed below is not required, skip the routing requirements of the cable. General Cabling Requirements Requirements for Bending Radius l The bending radius of the 7/8'' feeder must be more than 250 mm (9.84 in.), and the bending radius of the 5/4'' feeder must be more than 380 mm (14.96 in.).
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables l Drip loops must be made outside the feeder window, and the requirements for the minimum bending radius are met. l When cables are routed indoors, engineers are required indoors for cooperation. l The feeder window must be waterproofed. Outdoor Cabling Requirements l Cables routed outdoors must be led through a pipe when they may be damaged.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-1 Securing cables on the cable tray Secure cables on the tower, as shown in Figure 8-2. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-2 Securing cables on the tower Special Cabling Requirements Cabling Requirements for Power Cables l Power cables must be installed in the position specified in engineering design documents. l If the length of power cables is insufficient, replace the cables rather than adding connectors or soldering joints to lengthen the cables.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables l Cables are routed in an untangled and orderly fashion. l If DC power cables need to be routed on the tower platform, lay out the cables on the guardrail with the shortest distance and route the cables along the guardrail. l If DC power cables need to be routed close to a device on the tower, secure the cables to the guardrail or pole with cable clips. The device cannot be far away from the position for securing the cables.
DBS3900 RRU3252/RRU3256 Installation Guide l 8 Installing RRU Cables If the fiber optic cables close to a device are too long, coil the excess of the cables and secure them on the tower. 8.2 Cable Connections This section describes the cable connections for a single RRU and multiple RRUs. NOTE A lower-level RRU obtains power directly from the external power system, but not from an upper-level RRU using a power cable.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-4 Cable connections for a single RRU (2) (1) PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable (4) RRU AISG extension cable (5) CPRI optical fiber cable (6) RRU power cable (7) RGPS signal cable Figure 8-5 shows the cable connections adopted for multiple RRUs when the alarm monitoring function is provided. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-5 Cable connections for multiple RRUs (1) (1) PGND cable (2) RRU RF jumper (3) RRU alarm cable (4) CPRI optical fiber cable or SFP high-speed cable for cascading RRUs (5) RRU power cable (6) RGPS signal cable NOTE If you must cascade two or more RRUs in the same cell, for example, to expand the capacity, install the alarm cable to the RRU at the last level.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-6 Cable connections for multiple RRUs (2) (1) PGND cable (2) RRU RF jumper (4) RRU AISG extension cable (5) CPRI optical fiber cable or SFP highspeed cable for cascading RRUs (3) RRU AISG multi-wire cable (6) RRU power cable (7) RGPS signal cable 8.3 Installation Process This section describes the process of installing RRU cables. Figure 8-7 shows the process of installing RRU cables.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-7 Process of installing RRU cables 8.4 RRU Cable List This section describes RRU cable connections. Table 8-1 lists RRU cables. Table 8-1 RRU cables Cable One End The Other End Connector Connected to... Connector Connected to...
DBS3900 RRU3252/RRU3256 Installation Guide Cable 8 Installing RRU Cables One End Connector The Other End Connected to... Connector Connected to...
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8.5 Installing an RRU PGND Cable This section describes the procedure for installing an RRU PGND cable. Context The minimum cross-sectional area of an RRU PGND cable is 16 mm2 (0.025 in.2). The cable has an M6 OT terminal at one end and an M8 terminal at the other end. Procedure Step 1 Prepare an RRU PGND cable. 1. Cut the cable to the required length based on the actual cable route. 2.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-9 Correct direction of an OT terminal Step 3 Label the installed cable by referring to Attaching a Cable-Tying Label. ----End 8.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. Context The RF ports on the RRU must be connected using RF jumpers to the mapping ANT0 to ANT3 ports on the antenna. Figure 8-10shows the mapping relationship between the RF ports and the antenna ports.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Procedure Step 1 Connect the Type N connector at one end of the RRU RF jumper to the ANT port and use a torque wrench to tighten the connector with a torque of 1 N·m (12.39 lbf·in.), as shown in Figure 8-11.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-12 Waterproofing a connector of the RF jumper (1) PVC insulation tape (2) Waterproof tape NOTE l Before wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice its original length. l Before wrapping the PVC insulation tape, do not stretch the PVC insulation tape. l Ensure that each layer of tape overlaps more than 50% of the preceding layer.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-13 Waterproofing a dustproof cap (1) Dustproof cap (2) PVC insulation tape (3) Waterproof tape NOTE l Before wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice its original length. l Before wrapping the PVC insulation tape, do not stretch the PVC insulation tape. l Ensure that each layer of tape overlaps more than 50% of the preceding layer.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-14 Installing an RRU alarm cable Step 2 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Step 3 Label the installed cable by referring to Attaching an L-Shaped Label. ----End 8.8 Installing an RRU AISG Multi-Wire Cable and an RRU AISG Extension Cable This section describes the procedures for installing an RRU AISG multi-wire cable and an RRU AISG extension cable.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-15 Installing an RRU AISG multi-wire cable l 2. Connect the other end of the cable to the standard AISG male connector on the RCU. 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. 4. Label the installed cable by referring to Attaching an L-Shaped Label. Install an AISG multi-wire cable that is configured with an AISG extension cable. 1.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-16 Installing an RRU AISG multi-wire cable 2. Connect the other end of the AISG extension cable to the standard AISG male connector on the RCU, as shown in Figure 8-17. Figure 8-17 Installing an RRU AISG multi-wire cable 3. Issue Draft A (2012-11-30) Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 4. 8 Installing RRU Cables Label the installed cable by referring to Attaching an L-Shaped Label. ----End 8.9 Opening the Cover Plate of an RRU Cabling Cavity This section describes the procedure for opening the cover plate of an RRU cabling cavity. Procedure Step 1 Wear ESD gloves. CAUTION Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-19 RRU cabling cavity (1) Cover plate (2) Cable diagram on label (3) Cable trough for the optical fiber cable (4) Cable trough for the power cable (5) Waterproof block (6) Clip (7) Cabling cavity - - Step 3 Loosen the screws on the clips, and open the clips, as shown Figure 8-20. NOTE Open the clips only for the cables to be installed.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8.10 Installing an RRU Power Cable This section describes the procedure for installing an RRU power cable. Prerequisites A tool-less female connector (pressfit type) is added to the RRU power cable on the RRU side. For details, see 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables CAUTION Ensure that the exposed shield layer of the power cable is properly tightened using the clip. l 2. Connect the other end of the RRU power cable to the output terminal on the DCDU. 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. 4. Label the installed cable by referring to Attaching a Cable-Tying Label.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Context A CPRI optical fiber cable transmits CPRI signals between a BBU and an RRU. Procedure Step 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on the RRU and the other optical module into the CPRI port on the BBU, and raise the pullers, as shown in Figure 8-22.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables CAUTION To avoid any damage to optical fiber cables, secure the optical fiber cable in the cable clip near the power cable to leave some slack at the bend. Tighten the screws on the cable clip with a torque of 1.4 N·m (12.39 lbf·in.). Step 3 Connect the end labeled 2A and 2B of the optical fiber cable to the optical module on the BBU side. Step 4 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables CAUTION Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure 8-25. Figure 8-25 Correct placement of waterproof blocks Step 3 Close the cover plate of the RRU cabling cavity, and use a torque screwdriver to tighten the screws on the cover plate with a torque of 1.4 N·m (12.39 lbf·in.
DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Step 4 Take off the ESD gloves, and pack up all the tools. ----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 9 9 Checking the RRU Hardware Installation Checking the RRU Hardware Installation This section describes how to check RRU hardware installation after the installation is complete. Table 9-1 provides the checklist for the RRU hardware installation. Table 9-1 Checklist for the RRU hardware installation SN Item 1 The position for each device conforms to the engineering drawing and meets the space requirement.
DBS3900 RRU3252/RRU3256 Installation Guide 10 Powering On an RRU 10 Powering On an RRU This section describes how to check the power-on status of an RRU after all the devices are installed. Figure 10-1 shows the RRU power-on check process. Figure 10-1 Powering on an RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 10 Powering On an RRU NOTE l The RRU is provided with -48 V DC power and the external voltage ranges from -32 V DC to -60 V DC. l When the RRU is working properly, the RUN indicator blinks one second on and one second off, and the ALM indicator is steady off. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix 11 Appendix About This Chapter This section describes the procedure for adding an easy power receptacle (pressfit type) connector. 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable This section describes the procedure for adding an easy power receptacle (pressfit type) connector to an RRU power cable. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable This section describes the procedure for adding an easy power receptacle (pressfit type) connector to an RRU power cable. Procedure Step 1 Open the cabling cavity and take out the easy power receptacle (pressfit type) connector.
DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix NOTE Ensure that the length of the sheath stripped off from each core wire must match the length of the notch in the easy power receptacle (pressfit type) connector, as shown in Figure 11-4. Figure 11-4 Stripping off the sheath from each core wire Step 4 Strip off the sheath from the power cable to expose its shield layer, as shown in Figure 11-5.
DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix Step 6 Connect the blue core wire labeled NEG(-) to the - port and connect the black core wire labeled RTN(+) to the + port on the easy power receptacle (pressfit type) connector. Then, tighten the screws, as shown in Figure 11-7. Figure 11-7 Adding an easy power receptacle (pressfit type) connector to a power cable Ensure that only a 1.5 mm (0.06 in.
DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix ----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
