RRU3942 Installation Guide Issue Date HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2011. 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.
RRU3942 Installation Guide About This Document About This Document Purpose This document describes the process of installing a DC RRU3942 (referred to as RRU in this document). Product Version The following table lists the product version related to this document.
RRU3942 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 Installing the RRU This chapter describes the procedure for installing the RRU. The RRU can be installed on a pole, U-steel, angle steel, or wall. The procedure for installing the RRU varies depending on installation options.
RRU3942 Installation Guide About This Document 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. Command Conventions The command conventions that may be found in this document are defined as follows.
RRU3942 Installation Guide About This Document 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. Mouse Operations The mouse operations that may be found in this document are defined as follows.
RRU3942 Installation Guide Contents Contents About This Document.....................................................................................................................ii 1 Changes in the RRU3942 Installation Guide...........................................................................1 2 Installation Preparations..............................................................................................................2 2.1 Reference Documents............................................
RRU3942 Installation Guide Contents 7.3 Installation Process...........................................................................................................................................65 7.4 RRU Cable List................................................................................................................................................66 7.5 Installing an RRU PGND Cable...............................................................................................................
RRU3942 Installation Guide 1 1 Changes in the RRU3942 Installation Guide Changes in the RRU3942 Installation Guide This chapter describes the changes in the RRU3942 Installation Guide. 02() This is the second official release.
RRU3942 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 and prerequisites that installation engineers must have. 2.1 Reference Documents Before the installation, you must be familiar with reference documents. 2.
RRU3942 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 RRU3942 Hardware Description l RRU3942 Hardware Maintenance Guide l DBS3900 Installation Guide l OCB User Guide 2.2 Tools and Instruments All tools and instruments required for RRU installation must be ready before the installation.
RRU3942 Installation Guide 2 Installation Preparations Level Torque screwdriver Torque wrench 5 mm Capacity: 17 mm [0.67 in.], 21 mm [0.82 in.], and 32 mm [1.26 in.] Combination wrench (M3 to M6) (M3 to M6) Multimeter Marker (diameter ≤ 10 mm [0.39 in.]) Capacity: 17 mm [0.67 in.], 21 mm [0.82 in.], and 32 mm [1.26 in.] Measuring tape 2.3 Skills and Requirements for Onsite Personnel Onsite personnel must be qualified and trained.
RRU3942 Installation Guide 3 Information About the Installation 3 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 RRU ports positioned on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. 3.
RRU3942 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 3.2 RRU Ports This section describes RRU ports positioned on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 3-3 shows RRU ports on the panels.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-3 RRU ports on the panels Table 3-1 describes RRU ports and indicators on the panels. Table 3-1 RRU ports and indicators on the panels Issue () Item Label Description (1) Ports at the bottom ANT_TX/RXA TX/RX port A, supporting RET signal transmission ANT_RXC RX port C ANT_RXD Port RX port D Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 3 Information About the Installation Item (2) Ports in the cabling cavity (3) Indicators Label Description ANT_TX/RXB TX/RX port B RX_IN/OUT Port for the inter-RRU RF cable RET Communication port for the RET antenna, supporting RET signal transmission RTN(+) Power supply socket NEG(-) CPRI0 Optical/electrical port 0 CPRI1 Optical/electrical port 1 EXT_ALM Port for alarm reporting RUN For details, see 3.3 RRU Indicators.
RRU3942 Installation Guide 3 Information About the Installation Product Version TX/RX Channel Number of Used RF Ports Method Two 1T2R 4 ANT_TX/RXA is used with ANT_RXC, and ANT_TX/RXB is used with ANT_RXD. 2T2R 2 ANT_TX/RXA is used with ANT_TX/ RXB. 3.3 RRU Indicators This section describes six indicators on an RRU. They indicate the running status. For detailed positions of RRU indicators, see 3.2 RRU Ports. Table 3-3 describes RRU indicators.
RRU3942 Installation Guide 3 Information About the Installation Label Color Status Description VSWR Red Off No VSWR alarm is generated. Blinking (on for 1s and off for 1s) VSWR alarms are generated on the ANT_TX/RXB port. On VSWR alarms are generated on the ANT_TX/RXA port. Blinking (on for 0.125s and off for 0.125s) VSWR alarms are generated on the ANT_TX/RXA and ANT_TX/RXB ports. Steady green The CPRI link is available.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-4 Diameter of a pole CAUTION l The diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm (4.49 in.). The recommended diameter is 80 mm (3.15 in.). l If the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of two RRUs can be installed on the pole and the side-mounted installation is not recommended. Figure 3-5 shows an RRU installed on a pole.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-6 U-steel specifications CAUTION l It is recommended that only one RRU be installed on U-steel. l The vertical deviation angle of U-steel must be less than or equal to 10 degrees, as shown in Figure 3-7. Figure 3-7 Requirements for the vertical deviation angle of U-steel or angle steel (1) RRU (2) U-steel or angle steel Figure 3-8 shows an RRU installed on U-steel.
RRU3942 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 angle steel. l The vertical deviation angle of angle steel must be less than or equal to 10 degrees, as shown in Figure 3-7. Figure 3-10 shows an RRU installed on angle steel.
RRU3942 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 to 30 N·m (265.52 lbf·in.) to ensure the bolts work properly and the wall remains intact without cracks in it.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-12 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 Operation and Maintenance (O&M).
RRU3942 Installation Guide 3 Information About the Installation Figure 3-13 Recommended installation clearance for a single RRU Minimum Installation Clearance for a Single RRU Figure 3-14 shows the minimum installation clearance for a single RRU. Figure 3-14 Minimum installation clearance for a single RRU Minimum Installation Clearance for a Single RRU Installed on a Tower Figure 3-15 shows the minimum installation clearance for a single RRU installed on a tower.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-15 Minimum installation clearance for a single RRU installed on a tower 3.5.2 Installation Clearance for Multiple RRUs This section describes the recommended and minimum installation clearance for multiple RRUs. Recommended Installation Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-16 shows the recommended installation clearance for multiple RRUs installed in centralized mode.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-16 Recommended installation clearance for multiple RRUs installed in centralized mode Minimum Installation Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-17 shows the minimum installation clearance for multiple RRUs installed in centralized mode.
RRU3942 Installation Guide 3 Information About the Installation Recommended Clearance for Multiple RRUs Installed on a Wall in Standard Mode Figure 3-18 shows the recommended clearance for multiple RRUs installed on a wall in standard mode. Figure 3-18 Recommended clearance for multiple RRUs installed on a wall in standard mode Minimum Clearance for Multiple RRUs Installed on a Wall in Standard Mode Figure 3-19 shows the minimum clearance for multiple RRUs installed on a wall in standard mode.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-19 Minimum clearance for multiple RRUs installed on a wall in standard mode Recommended Clearance for Multiple RRUs Side-Mounted on a Wall Figure 3-20 shows the recommended clearance for multiple RRUs side-mounted on a wall. Figure 3-20 Recommended clearance for multiple RRUs side-mounted on a wall 3.5.3 Installation Spacing Between RRUs This section describes the horizontal and vertical installation spacing between RRUs.
RRU3942 Installation Guide 3 Information About the Installation Recommended Horizontal Spacing Between RRUs Figure 3-21 shows the recommended horizontal spacing between RRUs. Figure 3-21 Recommended horizontal spacing between RRUs Minimum Horizontal Spacing Between RRUs Figure 3-22 shows the minimum horizontal spacing between RRUs. Figure 3-22 Minimum horizontal spacing between RRUs Recommended Vertical Spacing Between RRUs Figure 3-23 shows the recommended vertical spacing between RRUs.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-23 Recommended vertical spacing between RRUs Minimum Vertical Spacing Between RRUs Figure 3-24 shows the minimum vertical spacing between RRUs. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 3 Information About the Installation Figure 3-24 Minimum vertical spacing between RRUs Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 4 Unpacking the Equipment 4 Unpacking the Equipment 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. l Wear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweatsoaked gloves, or dirty gloves.
RRU3942 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 vibrating indicator 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 ...
RRU3942 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 () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU 6 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. The procedure for installing the RRU varies depending on installation options. CAUTION l Do not stand the RRU upright because the load-bearing capacity of the RF ports at the RRU bottom is low.
RRU3942 Installation Guide 6 Installing the RRU Before installing an RRU on a tower, bind the RRU and mounting kits and then hoist them onto the tower. The RRU can be installed on a pole, U-steel, or angle steel. This section describes the procedure for hoisting the RRU and mounting kits onto the tower and the precautions that must be taken. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU 6.1 Mounting Kits for an RRU This section describes the bracket assembly and the attachment plate for an RRU. Figure 6-1 shows the front and rear view of an RRU. Figure 6-1 Front and rear view of an RRU (1) Cover plate (2) Attachment plate Figure 6-2 shows the bracket assembly for an RRU.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-3 shows a single RRU installed on a pole. Figure 6-3 A single RRU installed on a pole Figure 6-4 shows two RRUs installed on a pole. Figure 6-4 Two RRUs installed on a pole Figure 6-5, Figure 6-6, and Figure 6-7 show more than two RRUs installed on a pole. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-5 Three RRUs installed on a pole in centralized mode Figure 6-6 Four RRUs installed on a pole in centralized mode Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-7 Six RRUs installed on a pole in centralized mode 6.2.1 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. Prerequisite Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.6 Hoisting an RRU onto a Tower. The hoist clamp on the main mounting bracket is secured properly.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-8 Distance between the main mounting bracket and the ground Step 2 Fit one end of the auxiliary mounting bracket to one dual-nut bolt assembly of the main mounting bracket. Step 3 Install the bracket assembly on the pole, and then fit the other end of the auxiliary mounting bracket to the other dual-nut bolt assembly, as shown in Figure 6-9.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-10 Securing the bracket assembly onto the pole Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 6-11. Figure 6-11 Installing the RRU on the main mounting bracket ----End 6.2.2 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.
RRU3942 Installation Guide 6 Installing the RRU Procedure Step 1 Install the first RRU, as shown in Figure 6-12. For details, see 6.2.1 Installing a Single RRU. Figure 6-12 Installing the first RRU Step 2 Install the other main mounting bracket on the auxiliary mounting bracket to secure the second RRU, as shown in Figure 6-13.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-14 Interchanging the cover plate in the front and the attachment plate at the rear of the second RRU 1. Remove the attachment plate from the RRU rear using an inner hexagon screwdriver. 2. Remove the cover plate from the RRU front, and use a Phillips screwdriver to remove the plastic screws from the RRU. 3. Install the plastic screws onto the RRU rear, and tighten the screws to 0.25 N·m (2.21 lbf·in.) using a torque screwdriver. 4.
RRU3942 Installation Guide 6 Installing the RRU 6.2.3 Installing Multiple RRUs The section describes the procedure for installing multiple RRUs on a pole and the precautions that must be taken during the installation. Context A pole supports the installation of three, four, or six RRUs. The procedures for installing them are the same. Following is the procedure of installing four RRUs on a pole. Procedure Step 1 Install one set of bracket assembly on a pole. For details, see 6.2.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-17 Installing the first RRU on the main mounting bracket Step 4 Install the second main mounting bracket on the side of the first main mounting bracket, as shown in Figure 6-18. Figure 6-18 Installing the second main mounting bracket Step 5 Install the second RRU on the second main mounting bracket, as shown in Figure 6-19. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-19 Installing the second RRU on the second main mounting bracket Step 6 Install the third main mounting bracket, and then install the third RRU on the main mounting bracket, as shown in Figure 6-20. Figure 6-20 Installing the third RRU on the third main mounting bracket Step 7 Install the fourth main mounting bracket, as shown in Figure 6-21. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-21 Installing the fourth main mounting bracket Step 8 Install the fourth RRU on the fourth main mounting bracket, as shown in Figure 6-22. Figure 6-22 Installing the fourth RRU on the fourth main mounting bracket ----End 6.3 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.
RRU3942 Installation Guide 6 Installing the RRU The hoist clamp on the main mounting bracket is secured properly. Context Figure 6-23 shows the top view of the RRU installed on U-steel. Figure 6-23 Top view of the RRU (1) U-steel Procedure Step 1 Determine a position for installing the main mounting bracket. l If the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a Single RRU to determine a position.
RRU3942 Installation Guide 6 Installing the RRU NOTE It is recommended that the main mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above the ground. Step 2 Fit one end of the auxiliary mounting bracket to one dual-nut bolt assembly of the main mounting bracket. Step 3 Install the bracket assembly on U-steel, and then fit the other end of the auxiliary mounting bracket to the other dual-nut bolt assembly, as shown in Figure 6-25.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-26 Securing the bracket assembly onto U-steel Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 6-27. Figure 6-27 Installing the RRU on the main mounting bracket Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-28 Installing the RRU on the main mounting bracket ----End 6.4 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.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-29 Top view of the RRU (1) Angle steel Procedure Step 1 Determine a position for installing the main mounting bracket. l If the RRU must be installed on a tower, see 3.5.1 Installation Clearance for a Single RRU to determine a position. l If the RRU must be installed on the ground, see Figure 6-30 to determine a position.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-31 Installing the bracket assembly NOTE Verify that the arrow on the main mounting bracket is pointing up. Step 4 Using a torque wrench, tighten the nuts to 40 N·m (354.03 lbf·in.) to secure both the bracket assembly onto the angle steel, as shown in Figure 6-32. CAUTION Tighten the two dual-nut bolt assemblies alternatively.
RRU3942 Installation Guide 6 Installing the RRU Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 6-33. Figure 6-33 Installing the RRU on the main mounting bracket ----End 6.5 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. Prerequisite The hoist clamp on the main mounting bracket is secured properly.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-34 Marking anchor points (1) Auxiliary mounting bracket (2) RRU NOTE It is recommended that the auxiliary mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above the ground. Figure 6-35 Expansion bolt assembly (1) M10x65 bolt (2) Spring washer 10 (3) Plastic tube (4) Flat washer 10 (5) Expansion tube Step 2 Drill holes at the anchor points, and then insert expansion bolt assemblies, as shown in Figure 6-36.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-36 Drilling a hole and inserting an expansion bolt assembly 1. Use a hammer drill with a φ14 bit to drill holes vertically at the marked anchor points. Ensure that the depth of each hole ranges from 55 mm (2.17 in.) to 60 mm (2.36 in.). WARNING Take proper safety measures to protect your eyes and respiratory tract against the dust before drilling holes. 2.
RRU3942 Installation Guide 6 Installing the RRU Figure 6-37 Fitting the auxiliary mounting bracket on expansion bolts CAUTION Verify that the arrow on the auxiliary mounting bracket is pointing up. Step 4 Loosen the screws on the main mounting bracket and store them properly. Step 5 Install the main mounting bracket, as shown in Figure 6-38. Figure 6-38 Installing the main mounting bracket Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 6 Installing the RRU Step 6 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 6-39. Figure 6-39 Installing the RRU ----End 6.6 Hoisting an RRU onto a Tower Before installing an RRU on a tower, bind the RRU and mounting kits and then hoist them onto the tower. The RRU can be installed on a pole, U-steel, or angle steel.
RRU3942 Installation Guide 6 Installing the RRU Procedure Step 1 Bind the RRU and mounting kits properly using a lifting sling, as shown in Figure 6-40. Figure 6-40 Binding mounting kits for the RRU Step 2 Lead one sling through the lifting eye and RRU handle and use the sling as a lifting sling, and lead the other sling through the RRU handle and use the sling as a traction sling, as shown in Figure 6-41.
RRU3942 Installation Guide 6 Installing the RRU CAUTION l Each sling has a maximum load-bearing capacity of 200 kg (441 lb), the diameter of the sling must be less than 25 mm (0.98 in.), and the angle at the top of the traction sling [by the knot] must not be greater than 60 degrees. l When hoisting the RRU and mounting kits onto the tower, protect them from colliding with the ground and tower. l Hoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.
RRU3942 Installation Guide 6 Installing the RRU Step 3 Hoist the RRU and mounting kits onto the tower respectively, as shown in Figure 6-44. NOTE Hoist mounting kits onto the tower and then install the mounting kits before hoisting the RRU onto the tower. When hoisting the mounting kits and RRU, protect them from colliding with the tower. Figure 6-44 Hoisting the RRU onto the tower (1) Traction sling (2) Lifting sling (3) Fixed pulley 1.
RRU3942 Installation Guide 7 Installing RRU Cables 7 Installing RRU Cables About This Chapter This chapter describes the procedure for installing RRU cables. 7.1 Cabling Requirements Cables must be routed according to the specified cabling requirements to prevent signal interference. 7.2 Cable Connections This section describes the cable connections for a single RRU and multiple RRUs. 7.3 Installation Process This section describes the process of installing RRU cables. 7.
RRU3942 Installation Guide 7 Installing RRU Cables 7.13 Closing the Cover Plate of an RRU Cabling Cavity This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 7 Installing RRU Cables 7.1 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.).
RRU3942 Installation Guide 7 Installing RRU Cables 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. l AC power cables, transmission cables, and cables buried in the ground must be protected.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-1 Securing cables on the cable tray Secure cables on the tower, as shown in Figure 7-2. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-2 Securing cables on the tower Special Cabling Requirements Cabling Requirements for Power Cables Issue () 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. l Cables must be routed by only qualified and trained personnel before all preparations are made.
RRU3942 Installation Guide 7 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.
RRU3942 Installation Guide 7 Installing RRU Cables l If the fiber optic cables close to a device are too long, coil the excess of the cables and secure them on the tower. 7.2 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. Figure 7-3 shows the cable connections for a single RRU in the single-mode scenario.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-4 Cable connections for a single RRU in the multi-mode scenario (1) PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable (4) RRU AISG extension cable (5) RRU power cable (6) CPRI fiber optic cable (7) RRU alarm cable - - Figure 7-5 shows the cable connections for multiple RRUs in the single-mode scenario. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-5 Cable connections for multiple RRUs in the single-mode scenario (1) PGND cable (2) RRU RF jumper (3) RRU power cable (4) CPRI fiber optic cable - - Figure 7-6 shows the CPRI fiber optic cable connections for multiple RRUs in the multi-mode scenario. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-6 CPRI fiber optic cable connections for multiple RRUs in the multi-mode scenario 7.3 Installation Process This section describes the process of installing RRU cables. Figure 7-7 shows the process of installing RRU cables. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-7 Process of installing RRU cables 7.4 RRU Cable List This section describes RRU cable connections. Table 7-1 lists RRU cables. Table 7-1 RRU cables Cable RRU PGND Cable Issue () One End The Other End Connector Installation Position Connector Installation Position OT terminal (M6, 16 mm2 [0.025 in. 2]) Ground terminal on the RRU OT terminal (M8, 16 mm2 [0.025 in.
RRU3942 Installation Guide 7 Installing RRU Cables Cable One End The Other End Connector Installation Position Connector Installation Position Easy power receptacle (pressfit type) connector NEG(-) and RTN(+) ports on the RRU Easy power receptacle (pressfit type) connector One of RRU0 to RRU5 ports on the EPU RRU Alarm Cable DB15 connector EXT_ALM port on the RRU Cord end terminal External alarm device CPRI Fiber Optic Cable (in multimode scenarios) DLC connector CPRI0 port on the RRU D
RRU3942 Installation Guide 7 Installing RRU Cables Cable CPRI Fiber Optic Cable (in singlemode scenarios) One End The Other End Connector Installation Position Connector Installation Position DLC connector CPRI0 port on the RRU DLC connector GSM only (LO) mode CPRI port on the GTMU in the BBU UMTS only (LO) mode CPRI port on the WBBP in the BBU LTE only (LO) mode CPRI port on the LBBP in the BBU RRU RF Jumper DIN male connector ANT_TX/ RXA or ANT_TX/ RXB port on the RRU DIN male connector
RRU3942 Installation Guide 7 Installing RRU Cables Procedure Step 1 Prepare an RRU PGND cable. 1. Cut the cable to the required length based on the actual cable route. 2. Add an OT terminal to each end of the cable by referring to Assembling the OT Terminal and the Power Cable. Step 2 Install the RRU PGND cable. Connect the M6 OT terminal at one end of the PGND cable to the ground terminal at the RRU bottom and the M8 OT terminal at the other end to the external ground bar, as shown in Figure 7-8.
RRU3942 Installation Guide 7 Installing RRU Cables Step 3 Label the installed cable by referring to Attaching a Cable-Tying Label. ----End 7.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. Procedure Step 1 Link the DIN connector at one end of the RF jumper to the ANT port and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure 7-10.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-11 Waterproofing a connector of the RF jumper (1) Waterproof tape (2) PVC insulation tape NOTE l Before wrapping waterproof tape, stretch the tape evenly until the width of the tape is half of its original width. l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps more than 50% of the preceding layer. 1.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-12 Waterproofing a dustproof cap (1) Dustproof cap (2) Waterproof tape (3) PVC insulation tape NOTE l Before wrapping waterproof tape, stretch the tape evenly until the width of the tape is half of its original width. l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps more than 50% of the preceding layer. 1. Verify that dustproof caps are not removed. 2.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-13 Installing an inter-RRU RF cable Step 2 Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable ties. Step 3 Label the installed cable by referring to Attaching an L-Shaped Label. ----End 7.8 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable This section describes the procedures for installing an RRU AISG multi-wire cable and AISG extension cable.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-14 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. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable ties. 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.
RRU3942 Installation Guide 7 Installing RRU Cables 2. Connect the other end of the AISG extension cable to the standard AISG male connector on the RCU, as shown in Figure 7-16. Figure 7-16 Installing an RRU AISG multi-wire cable 3. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable ties. 4. Label the installed cable by referring to Attaching an L-Shaped Label. ----End 7.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-17 Opening the cover plate of the RRU cabling cavity (1) Protection screw Figure 7-18 shows the RRU cabling cavity. Figure 7-18 RRU cabling cavity (1) Cover plate (2) Cable diagram on labels (4) Cable trough for the power cable (5) Cable trough for the alarm cable (6) Waterproof block (7) Clip (8) Cabling cavity (3) Cable trough for the fiber optic cable - Step 3 Loosen the screws on the clip, and open the clip, as shown Figure 7-19.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-19 Opening clips ----End 7.10 Installing an RRU power cable This section describes the procedure for installing an RRU power cable. Prerequisite l An easy power receptacle (pressfit type) connector is added to the RRU power cable on the RRU side. For details, see 10.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to the RRU Power Cable on the RRU Side.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-20 Installing an RRU power cable CAUTION Ensure that the exposed shield layer of the power cable is properly tightened using the clip. 2. Link the easy power receptacle (pressfit type) connector at the other end of the RRU power cable to the LOAD0 port on the DCDU-11B. NOTE One DCDU-11B can supply power to a maximum of six RRUs. The RRU power cable can be connected to any wiring terminal from LOAD0 to LOAD5 on the DCDU-11B. l Issue () 3.
RRU3942 Installation Guide 7 Installing RRU Cables NOTE l The blue core wire in the easy power receptacle (pressfit type) connector is linked to the left port on the EPU subrack, and the black/brown core wire is linked to the right port on the EPU subrack. l The EPU can supply power to a maximum of six RRUs. The RRU power cable can be connected to any of RRU0 to RRU5 ports on the EPU. 3. Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable ties. 4.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-21 Installing an optical module CAUTION The performance of an optical module that is exposed to the air for more than 20 minutes may be abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical module within 20 minutes. Step 2 Connect the end labeled 1A and 1B of the fiber optic cable to the optical module on the RRU side, as shown in Figure 7-22.
RRU3942 Installation Guide 7 Installing RRU Cables CAUTION Install the fiber optic cable in the cable clip near the power cable to leave some slack at the bend. Tighten the screws on the cable clip to 1.4 N·m (12.39 lbf·in.). Step 3 Connect the end labeled 2A and 2B of the fiber optic cable to the optical module on the BBU side. Step 4 Lay out the fiber optic cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable ties.
RRU3942 Installation Guide 7 Installing RRU Cables Step 2 Lay out the cable by referring to 7.1 Cabling Requirements, and then bind the cable using cable ties. Step 3 Label the installed cable by referring to Attaching an L-Shaped Label. ----End 7.13 Closing the Cover Plate of an RRU Cabling Cavity This section describes the procedure for closing the cover plate of an RRU cabling cavity. Procedure Step 1 Close clips and tighten the screws on each clip to 1.4 N·m (12.39 lbf·in.
RRU3942 Installation Guide 7 Installing RRU Cables Figure 7-25 Correct placement of waterproof blocks Step 3 Close the cover plate of the RRU cabling cavity and tighten the screws on the cover plate to 0.8 N·m (7.08 lbf·in.) using a torque screwdriver, as shown in Figure 7-26. Figure 7-26 Closing the cover plate of the RRU cabling cavity (1) Protection screw CAUTION l Before tightening the screws on the cover plate, ensure that cables and waterproof blocks are properly inserted into troughs.
RRU3942 Installation Guide 8 8 Checking the RRU Hardware Installation Checking the RRU Hardware Installation After an RRU is installed, check the hardware installation. Table 8-1 provides the checklist for the RRU hardware installation. Table 8-1 Checklist for the RRU hardware installation Issue () SN Item 1 The position for each device conforms to the engineering drawing and meets the space requirement. Sufficient space is reserved for equipment maintenance. 2 The RRU is securely installed.
RRU3942 Installation Guide 9 Powering On an RRU 9 Powering On an RRU After all the devices are installed, check the power-on status of an RRU. CAUTION After you unpack an RRU, you must power on it within 24 hours. If you power off the RRU for maintenance, you must restore power to the RRU within 24 hours. Figure 9-1 shows the RRU power-on check process. Figure 9-1 RRU power-on check process Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 10 Appendix 10 Appendix About This Chapter This section describes the procedure for adding an easy power receptacle (pressfit type) connector. 10.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to the RRU Power Cable on the RRU Side This section describes the procedure for adding an easy power receptacle (pressfit type) connector to the RRU power cable on the RRU side. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3942 Installation Guide 10 Appendix 10.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to the RRU Power Cable on the RRU Side This section describes the procedure for adding an easy power receptacle (pressfit type) connector to the RRU power cable on the RRU side. Procedure Step 1 Figure 10-1 shows the cable diagram on labels.
RRU3942 Installation Guide 10 Appendix Figure 10-3 Stripping the specified length of sheath Step 4 Strip a specified length of sheath off each core wire. The length must be consistent with the length of the notch in the easy power receptacle (pressfit type) connector, as shown in Figure 10-4. Figure 10-4 Stripping the sheath off each core wire Figure 10-5 Matched length Step 5 Add an easy power receptacle (pressfit type) connector to two core wires. 1.
RRU3942 Installation Guide 10 Appendix Figure 10-6 Tightening screws 2. Connect the blue core wire labeled NEG(-) to the - port and the black/brown core wire labeled RTN(+) to the + port on the easy power receptacle (pressfit type) connector, and then tighten the screws using a Phillips screwdriver, as shown in Figure 10-7.
RRU3942 Installation Guide 10 Appendix CAUTION Each core wire is exposed outside the easy power receptacle (pressfit type) connector for 1.5 mm (0.059 [in.]), as shown in Figure 10-9. Figure 10-9 Inserting core wires into the easy power receptacle (pressfit type) connector ----End Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
