Huawei Technologies RRU3942-850 Remote Radio Unit User Manual Installation Guide
Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide
Contents
- 1. Installation Manual
- 2. User Manual
User Manual
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| Document ID | 2307905 |
| Application ID | b/XX/ed5axL5hx8GNpk+tg== |
| Document Description | User Manual |
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| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 193.38kB (2417216 bits) |
| Date Submitted | 2014-06-26 00:00:00 |
| Date Available | 2014-11-22 00:00:00 |
| Creation Date | 2014-01-08 03:27:38 |
| Producing Software | Antenna House PDF Output Library 2.4.0 (Windows) |
| Document Lastmod | 2014-01-08 03:27:38 |
| Document Title | Installation Guide |
| Document Creator | AH Formatter V6.0 R1 (6,0,2012,1211) for Windows |
| Document Author: | Huawei Technologies Co., Ltd. |
RRU3942&RRU3642
Installation Guide
Issue
07
Date
2013-12-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2013. 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.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or representations
of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
support@huawei.com
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About This Document
About This Document
Purpose
This document describes the process of installing DC RRU3942 and RRU3642 (referred to as
RRU in this document).
Product Version
The following table lists the product version related to this document for RRU3942.
Product Name
Product Version
DBS3900
V100R004C00 and later versions
DBS3900 GSM
V100R013C00 and later versions
DBS3900 WCDMA
V200R013C00 and later versions
DBS3900 LTE
V100R005C00 and later versions
The following table lists the product version related to this document for RRU3642.
Product Name
Product Version
DBS3900
V100R008C00 and later versions
DBS3900 LTE
V100R006C00 and later versions
Intended Audience
This document is intended for:
Base station installation engineers
Organization
1 Changes in the RRU3942&RRU3642 Installation Guide
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About This Document
This chapter describes the changes in the RRU3942&RRU3642 Installation Guide.
2 Installation Preparations
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.
3 Information About the Installation
Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation
options and installation clearance requirements.
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.
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 an RRU and Related Cables onto a Tower
This section describes the procedure for hoisting an RRU and related cables onto a tower and
the precautions that must be taken.
7 Installing the RRU
This chapter describes the procedure for installing the RRU. The procedure for installing the
RRU varies depending on installation options.
8 Installing RRU Cables
This chapter describes the procedure for installing RRU cables.
9 Checking the RRU Hardware Installation
After an RRU is installed, check the hardware installation.
10 Powering On an RRU
After all the devices are installed, check the power-on status of an RRU.
11 Appendix
This section describes the procedure for adding an easy power receptacle (pressfit type)
connector.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
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About This Document
Symbol
Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
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.
Command Conventions
The command conventions that may be found in this document are defined as follows.
Issue 07 (2013-12-30)
Convention
Description
Boldface
The keywords of a command line are in boldface.
Italic
Command arguments are in italics.
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Convention
Description
[]
Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... }
Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ]
Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }*
Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]*
Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention
Description
Boldface
Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK.
Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.
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.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
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About This Document
Action
Description
Click
Select and release the primary mouse button without moving
the pointer.
Double-click
Press the primary mouse button twice continuously and
quickly without moving the pointer.
Drag
Press and hold the primary mouse button and move the
pointer to a certain position.
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Contents
Contents
About This Document.....................................................................................................................ii
1 Changes in the RRU3942&RRU3642 Installation Guide.......................................................1
2 Installation Preparations..............................................................................................................5
2.1 Reference Documents.....................................................................................................................................................6
2.2 Tools and Instruments....................................................................................................................................................6
2.3 Skills and Requirements for Onsite Personnel...............................................................................................................8
3 Information About the Installation...........................................................................................9
3.1 RRU Exterior................................................................................................................................................................10
3.2 RRU Ports.....................................................................................................................................................................10
3.3 RRU Indicators.............................................................................................................................................................18
3.4 Installation Scenarios....................................................................................................................................................20
3.5 Installation Clearance Requirements of an RRU..........................................................................................................28
3.5.1 Clearance for a Single RRU......................................................................................................................................28
3.5.2 Clearances for Three or More RRUs.........................................................................................................................30
3.5.3 Installation Spacing Between RRUs..........................................................................................................................34
4 Unpacking the Equipment.........................................................................................................37
5 Installation Process.....................................................................................................................39
6 Hoisting an RRU and Related Cables onto a Tower............................................................40
6.1 Hoisting an RRU onto a Tower....................................................................................................................................41
6.2 Hoisting Fiber Optic Cables onto a Tower...................................................................................................................45
6.3 Hoisting Power Cables onto a Tower...........................................................................................................................47
7 Installing the RRU.......................................................................................................................50
7.1 Mounting Kits for an RRU...........................................................................................................................................51
7.2 Installing the RRU on a Pole........................................................................................................................................51
7.2.1 Installing a Single RRU.............................................................................................................................................52
7.2.2 Installing Two RRUs.................................................................................................................................................55
7.2.3 Installing Three or More RRUs.................................................................................................................................60
7.3 Installing the RRU on U-steel......................................................................................................................................64
7.4 Installing the RRU on Angle Steel...............................................................................................................................68
7.5 Installing the RRU on a Wall.......................................................................................................................................72
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7.6 Installing an RRU on an IFS06.....................................................................................................................................76
8 Installing RRU Cables................................................................................................................82
8.1 Cabling Requirements..................................................................................................................................................84
8.2 Cable Connections........................................................................................................................................................90
8.3 Installation Process.......................................................................................................................................................94
8.4 RRU Cable List............................................................................................................................................................95
8.5 Installing an RRU PGND Cable...................................................................................................................................97
8.6 Installing an RRU RF Jumper......................................................................................................................................98
8.7 Installing an Inter-RRU RF Cable..............................................................................................................................102
8.8 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable...................................................................103
8.9 Opening the Cover Plate of an RRU Cabling Cavity.................................................................................................105
8.10 Installing an RRU Power Cable................................................................................................................................107
8.11 Installing a CPRI Fiber Optic Cable.........................................................................................................................109
8.12 Installing an RRU Alarm Cable................................................................................................................................111
8.13 Closing the Cover Plate of an RRU Cabling Cavity................................................................................................111
9 Checking the RRU Hardware Installation............................................................................114
10 Powering On an RRU.............................................................................................................115
11 Appendix...................................................................................................................................117
11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side......................118
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1 Changes in the RRU3942&RRU3642 Installation Guide
Changes in the RRU3942&RRU3642
Installation Guide
This chapter describes the changes in the RRU3942&RRU3642 Installation Guide.
07 (2013-12-30)
This is the seventh official release.
Compared with issue 06 (2013-12-23), this issue includes the following change:
Topic
Change Description
3.4 Installation Scenarios
Modified the figure showing the U-steel
specifications.
Compared with issue 06 (2013-12-23), this issue does not include any new information and no
information is deleted from this issue.
06 (2013-12-23)
This is the sixth official release.
Compared with issue 05 (2013-06-26), this issue includes the following change:
Topic
Change Description
6.1 Hoisting an RRU onto a Tower
Optimized the procedure for hoisting an RRU
onto a Tower.
Compared with issue 05 (2013-06-26), this issue does not include any new information and no
information is deleted from this issue.
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Installation Guide
1 Changes in the RRU3942&RRU3642 Installation Guide
05 (2013-06-26)
This is the fifth official release.
Compared with issue 04 (2013-04-28), this issue includes the following change:
Topic
Change Description
8.10 Installing an RRU Power Cable
Added the power device DCDU-12B for the
RRU.
Compared with issue 04 (2013-04-28), this issue does not include any new information and no
information is deleted from this issue.
04 (2013-04-28)
This is the fourth official release.
Compared with issue 03 (2013-01-14), this issue includes the following new information:
7.6 Installing an RRU on an IFS06
Compared with issue 03 (2013-01-14), this issue includes the following change:
Topic
Change Description
The whole document
Modified the figures showing the mounting kits for
an RRU, which have been modified.
About This Document
Changed the document name from RRU3942
Installation Guide to RRU3942&RRU3642
Installation Guide.
2.2 Tools and Instruments
Modified the specifications of the hammer drill and
wrench.
3.4 Installation Scenarios
Modified the installation scenarios of the RRU.
4 Unpacking the Equipment
Added requirements for checking the insulation layer
of RRU cables.
7 Installing the RRU
Changed the procedures for installing the RRU in
different scenarios because RRU mounting kits and
attachment plates are redesigned.
8.1 Cabling Requirements
Added requirements for routes of RRU cables.
Compared with issue 03 (2013-01-14), no information is deleted from this issue.
03 (2013-01-14)
This is the third official release.
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Installation Guide
1 Changes in the RRU3942&RRU3642 Installation Guide
Compared with issue 02 (2012-09-15), this issue does not include any new information.
Compared with issue 02 (2012-09-15), this issue includes the following change:
Topic
Change Description
8.10 Installing an RRU Power Cable
Added the attention for installing the RRU
power cable.
Compared with issue 02 (2012-09-15), no information is deleted from this issue.
02 (2012-09-15)
This is the second official release.
Compared with issue 01 (2012-04-25), this issue does not include any new information.
Compared with issue 01 (2012-04-25), this issue includes the following change:
Topic
Change Description
8.6 Installing an RRU RF Jumper
Optimized the procedure for waterproofing
the connectors on an RRU RF jumper and the
dustproof caps.
6.2 Hoisting Fiber Optic Cables onto a
Tower
Optimized the procedure for hoisting.
6.3 Hoisting Power Cables onto a Tower
Compared with issue 01 (2012-04-25), no information is deleted from this issue.
01 (2012-04-25)
This is the first official release.
Compared with draft B (2012-04-16), this issue does not include any modification.
Draft B (2012-04-16)
This is the draft.
Compared with issue draft A (2012-01-10), this issue does not include any new information.
Compared with issue draft A (2012-01-10), this issue includes the following change:
Topic
Change Description
3.4 Installation Scenarios
Optimized the contents in this document.
Compared with issue draft A (2012-01-10), no information is deleted from this issue.
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Draft A (2012-01-10)
This is a draft.
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2 Installation Preparations
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.
2.2 Tools and Instruments
You must prepare the following tools and instruments before the installation.
2.3 Skills and Requirements for Onsite Personnel
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
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2.1 Reference Documents
Before the installation, you must be familiar with reference documents.
The following reference documents are required during RRU installation:
RRU3942&RRU3642 Hardware Description
DBS3900 Installation Guide
OCB User Guide
OCB-01M User Guide
2.2 Tools and Instruments
You must prepare the following tools and instruments before the installation.
Issue 07 (2013-12-30)
Hammer drill (a φ12 bit)
ESD gloves
Vacuum cleaner
Heat gun
Phillips screwdriver (M3 to
M6)
Flat-head screwdriver (M3 to
M6)
Rubber mallet
COAX crimping tool
Wire stripper
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Utility knife
Cable cutter
Adjustable wrench (size ≥ 32
mm [1.26 in.])
Torque wrench
Size: 16 mm (0.63 in.) and 32
mm (1.26 in.)
Combination wrench
Size: 16 mm (0.63 in.) and 32
mm (1.26 in.)
Torque screwdriver
Level
Torque socket
5 mm
5 mm
(M3 to M6)
(M3 to M6)
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Multimeter
Marker (diameter ≤ 10 mm
[0.39 in.])
Measuring tape
Inner hexagon wrench
Fixed pulley
Lifting sling
Hydraulic pliers
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2.3 Skills and Requirements for Onsite Personnel
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
Before the installation, pay attention to the following items:
The customer's technical engineers must be trained by Huawei and be familiar with the
proper installation and operation methods.
The number of onsite personnel depends on the engineering schedule and installation
environment. Generally, only three to five onsite personnel are necessary.
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Information About the Installation
About This Chapter
Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation
options 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.
3.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
3.4 Installation Scenarios
An RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios
must meet heat-dissipation and waterproofing requirements of the RRU.
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.
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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 ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
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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.
Table 3-1 Ports and indicators on the RRU panels
Issue 07 (2013-12-30)
Item
Silkscreen
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
ANT_TX/RXB
TX/RX port B
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Item
(2) Ports in the cabling
cavity
(3) Indicators
Silkscreen
Description
RX_IN/OUT
Interconnection port
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
Alarm monitoring port used for monitoring
one RS485 signal and two dry contact signals
RUN
See 3.3 RRU Indicators.
ALM
ACT
VSWR
CPRI0/IR0
CPRI1/IR1
NOTE
l The port for transmitting RET signals is determined by the software.
l For the RRU3942, both CPRI0 and CPRI1 can be conected to the BBU. Use the CPRI0 by default in
the single-mode scenario.
l For the RRU3642, CPRI0 is connected to the BBU and the CPRI1 is reserved. The RX_IN/OUT is not
used.
Table 3-2 describes how to use RF ports for RRU3942.
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Table 3-2 Usage of RF ports for RRU3942
Product Version
TX/RX
Channe
Number
of Used
RF Ports
Usage
Remarks
l DBS3900
V100R004C00
1 x 2T2R
ANT_TX/RXA and
ANT_TX/RXB are used
together.
A single
sector
1 x 1T2R
It is recommended that
ANT_TX/RXA and
ANT_RXC be used
together.
A single
sector
l DBS3900 GSM
V100R013C00
l DBS3900 GSM
V300R013C00
l DBS3900
WCDMA
V200R013C00
l DBS3900 GSM
V100R014C00
and later versions
l DBS3900 GSM
V300R014C00
and later versions
l DBS3900
V100R007C00
and later versions
You can also use ANT_TX/
RXB and ANT_RXD
together.
1 x 2T2R
ANT_TX/RXA and
ANT_TX/RXB are used
together.
A single
sector
2 x 1T2R
ANT_TX/RXA and
ANT_RXC are used for one
sector; ANT_TX/RXB and
ANT_RXD are used for the
other sector.
Two sectors
1 x 1T2R
It is recommended that
ANT_TX/RXA and
ANT_RXC be used
together.
A single
sector
l DBS3900
WCDMA
V200R014C00
and later versions
l DBS3900 LTE
V100R005C00
and later versions
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You can also use ANT_TX/
RXB and ANT_RXD
together.
1 x 2T2R
ANT_TX/RXA and
ANT_TX/RXB are used
together.
A single
sector
2 x 1T2R
ANT_TX/RXA and
ANT_RXC are used for one
sector; ANT_TX/RXB and
ANT_RXD are used for the
other sector.
Two sectors
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Product Version
TX/RX
Channe
Number
of Used
RF Ports
Usage
Remarks
1 x 2T4R
ANT_TX/RXA, ANT_TX/ A single
RXB, ANT_RXC, and
sector
ANT_RXD are used
together for one sector, with
ANT_TX/RXA and
ANT_RXC combined and
ANT_TX/RXB and
ANT_RXD combined.
Figure 3-4 shows the recommended usage of RF ports on an RRU3942 used for DBS3900
V100R004C00, DBS3900 GSM V100R013C00, DBS3900 GSM V300R013C00, or DBS3900
WCDMA V200R013C00.
Figure 3-4 Recommended usage of RF ports on an RRU3942 used for DBS3900 V100R004C00,
DBS3900 GSM V100R013C00, DBS3900 GSM V300R013C00, or DBS3900 WCDMA
V200R013C00
Figure 3-5 shows the recommended usage of RF ports on an RRU3942 used for DBS3900 GSM
V100R014C00 and later versions or DBS3900 GSM V300R014C00 and later versions.
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Figure 3-5 Recommended usage of RF ports on an RRU3942 used for DBS3900 GSM
V100R014C00 and later versions or DBS3900 GSM V300R014C00 and later versions
Figure 3-6 shows the recommended usage of RF ports on an RRU3942 used for DBS3900
V100R007C00 and later versions, DBS3900 WCDMA V200R014C00 and later versions, or
DBS3900 LTE V100R005C00 and later versions.
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Figure 3-6 Recommended usage of RF ports on an RRU3942 used for DBS3900 V100R007C00
and later versions, DBS3900 WCDMA V200R014C00 and later versions, or DBS3900 LTE
V100R005C00 and later versions
Table 3-3 describes how to use RF ports for RRU3642.
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3 Information About the Installation
Table 3-3 Usage of RF ports for RRU3642
Product Version
TX/RX
Channe
Number
of Used
RF Ports
Usage
Remarks
l DBS3900 LTE
V100R006C00
and later versions
1 x 1T2R
It is recommended that
ANT_TX/RXA and
ANT_RXC be used
together.
A single
sector
You can also use ANT_TX/
RXB and ANT_RXD
together.
1 x 2T2R
ANT_TX/RXA and
ANT_TX/RXB are used
together.
A single
sector
2 x 1T2R
ANT_TX/RXA and
ANT_RXC are used for one
sector; ANT_TX/RXB and
ANT_RXD are used for the
other sector.
Two sectors
1 x 2T4R
ANT_TX/RXA, ANT_TX/ A single
RXB, ANT_RXC, and
sector
ANT_RXD are used
together for one sector, with
ANT_TX/RXA and
ANT_RXC combined and
ANT_TX/RXB and
ANT_RXD combined.
Figure 3-7 shows the recommended usage of RF ports on an RRU3642 used for DBS3900 LTE
V100R006C00 and later versions.
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Figure 3-7 Recommended usage of RF ports on an RRU3642 used for DBS3900 LTE
V100R006C00 and later versions
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 3-4 describes RRU indicators.
Table 3-4 RRU indicators
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Indicator
Color
Status
Meaning
RUN
Green
Steady on
There is power supply, but the module is
faulty.
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Indicator
ALM
ACT
VSWR
CPRI0/IR0
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Color
Red
Green
Red
Red or
green
Status
Meaning
Steady off
There is no power supply, or the module is
faulty.
Blinking (on for
1s and off for 1s)
The board is functioning 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.
Blinking (on for
1s and off for 1s)
Alarms are generated. The alarms may be
caused by the faults on the related boards or
ports. Therefore, you need to locate the fault
before deciding whether to replace the
module.
Steady off
No alarm is generated.
Steady on
The module is running properly with TX
channels enabled or the software is being
loaded without RRU running.
Blinking (on for
1s and off for 1s)
The module is running properly with TX
channels disabled.
Steady off
No Voltage Standing Wave Ratio (VSWR)
alarm is generated.
Blinking (on for
1s and off for 1s)
VSWR alarms are generated on the
ANT_TX/RXB port.
Steady 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 functioning properly.
Steady red
An optical module fails to transmit or receive
signals because the optical module is faulty
or the fiber optic cable is broken.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock because of a
failure in clock lock between two modes or
mismatched data rates over CPRI ports.
Steady off
The optical module cannot be detected, or the
optical module is powered off.
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Indicator
Color
Status
Meaning
CPRI1/IR1
Red or
green
Steady green
The CPRI link is functioning properly.
Steady red
An optical module fails to transmit or receive
signals because the optical module is faulty
or the fiber optic cable is broken.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock because of a
failure in clock lock between two modes or
mismatched data rates over CPRI ports.
Steady off
The optical module cannot be detected, or the
optical module is powered off.
3.4 Installation Scenarios
An RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios
must meet heat-dissipation and waterproofing requirements of the RRU.
Requirements for the Installation Scenarios
Method of installation:
To ensure the heat dissipation of the RRU and waterproofing of the ports at the bottom of
the RRU, the vertical deviation angle of an RRU must be less than or equal to 10 degrees,
as shown in Figure 3-8.
On a tower, an RRU can be installed on a pole, angle steel, or U-steel. U-steel and angle
steel support the standard or reverse installation of a single RRU only.
Figure 3-8 Requirements for the vertical deviation angle of an RRU
(1) RRU
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Installing an RRU on a Pole
Figure 3-9 shows the diameter of a pole for installing an RRU.
Figure 3-9 Diameter of a pole
NOTICE
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 When the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum
of three RRUs can be installed on the pole.
l Only a pole whose diameter ranges from 76 mm (2.99 in.) to 114 mm (4.49 in.) supports
more than three RRUs.
l The recommended thickness of the wall of a pole is 3.5 mm (0.14 in.) or above.
A single RRU can be installed in either side-mounted or standard mode.Figure 3-10 shows a
single RRU installed on a pole.
Figure 3-10 A single RRU installed on a pole
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Two RRUs can be installed next to each other at the same level or vertically at different
levels.Figure 3-11 shows two RRUs installed on a pole.
Figure 3-11 Two RRUs installed on a pole
Figure 3-12, Figure 3-13, and Figure 3-14 show three or more RRUs installed on a pole.
Figure 3-12 Three RRUs installed on a pole
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Figure 3-13 Four RRUs installed on a pole
Figure 3-14 Six RRUs installed on a pole
Installing an RRU on U-steel
Figure 3-15 shows U-steel specifications.
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Figure 3-15 U-steel specifications
NOTICE
It is recommended that only one RRU be installed on one U-steel.
Figure 3-16 shows an RRU installed on U-steel.
Figure 3-16 RRU installed on U-steel
Installing an RRU on Angle Steel
Figure 3-17 shows angle steel specifications.
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Figure 3-17 Angle steel specifications
NOTICE
It is recommended that only one RRU be installed on one angle steel.
Figure 3-18 shows an RRU installed on angle steel.
Figure 3-18 RRU installed on angle steel
Installing an RRU on a Wall
The wall for installing RRUs must meet the following requirements:
For each RRU, the wall must be able to bear a weight four times the RRU's weight and the
bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.
Expansion bolts must be tightened to 15 N·m (132.76 lbf·in.) so that the bolts stay secured
without damaging the wall.
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NOTICE
The mounting brackets for multiple RRUs cannot be combined when the RRUs are installed on
a wall in side-mounted mode, as shown in Figure 3-19.
Figure 3-19 Correct installation of mounting brackets for multiple RRUs
Figure 3-20 shows an RRU installed on a wall.
Figure 3-20 RRU installed on a wall
Installing an RRU on an IFS06
In an IFS06 scenario:
The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for
heights of RRUs.
The IFS06 supports at least three RRUs when the ambient temperature is higher than or
equal to the lowest operating temperature of the RRU and at least 5°C (41°F) lower than
the highest operating temperature of the RRU. The IFS06 supports a maximum of six RRUs
when the ambient temperature is higher than or equal to the lowest operating temperature
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of the RRU and at least 10°C (50°F) lower than the highest operating temperature of the
RRU.
NOTE
For details about the operating temperature of the RRU, see section "Technical Specifications of
RRUs" in 3900 Series Base Station Technical Description.
NOTICE
The mounting brackets for multiple RRUs cannot be combined when the RRUs are installed on
an IFS06, as shown in Figure 3-19.
Figure 3-21 and Figure 3-22 show RRUs installed on an IFS06.
Figure 3-21 Three RRUs installed on an IFS06
(1) Height-restricted scenario
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(2) Height-unrestricted scenario
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Figure 3-22 Six RRUs installed on an IFS06
(1) Height-restricted scenario
(2) Height-unrestricted scenario
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.
3.5.1 Clearance for a Single RRU
This section describes the recommended and minimum clearance for a single RRU.
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NOTE
l The recommended clearance ensures normal running and provides an appropriate space for operation
and maintenance (OM). If there is sufficient space, leave the recommended clearance after installing
the equipment.
l The minimum clearance ensures normal running and heat dissipation, but OM activities such as
checking indicator status and opening the cabling cavity cannot be properly conducted. If the
installation space is restricted, leave the minimum clearance after installing the equipment.
Recommended Clearance for a Single RRU
Figure 3-23 shows the recommended clearance for a single RRU.
Figure 3-23 Recommended clearance for a single RRU
Minimum Clearance for a Single RRU
Figure 3-24 shows the minimum clearance for a single RRU.
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Figure 3-24 Minimum clearance for a single RRU
Minimum Clearance for a Single RRU on a Tower
Figure 3-25 shows the minimum clearance for a single RRU installed on a tower.
Figure 3-25 Minimum clearance for a single RRU on a tower
3.5.2 Clearances for Three or More RRUs
This section describes the recommended and minimum clearances for three or more RRUs.
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NOTE
l The recommended clearances ensure normal running and provide an appropriate space for operation
and maintenance (OM). If there is sufficient space, retain the recommended clearances.
l The minimum clearances ensure normal running and heat dissipation but do not allow OM activities
such as checking indicator status and opening the cabling cavity. If the installation space is insufficient,
retain the minimum clearances after the installation.
Recommended Clearances for Three or More RRUs Installed on a Pole
Figure 3-26 shows the recommended clearances for multiple RRUs installed in centralized
mode.
Figure 3-26 Recommended clearances for three or more RRUs installed on a pole
Minimum Clearances for Three or More RRUs Installed on a Pole
Figure 3-27 shows the minimum clearances for multiple RRUs installed in centralized mode.
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Figure 3-27 Minimum clearances for three or more RRUs installed on a pole
Recommended Clearances for Three or More RRUs Installed on a Wall in Standard
Mode
Figure 3-28 shows the recommended clearances for multiple RRUs installed on a wall in
standard mode.
Figure 3-28 Recommended clearances for three or more RRUs installed on a wall in standard
mode
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Minimum Clearances for Three or More RRUs Installed on a Wall in Standard
Mode
Figure 3-29 shows the minimum clearances for three or more RRUs installed on a wall in
standard mode.
Figure 3-29 Minimum clearances for three or more RRUs installed on a wall in standard mode
Recommended Clearances for Three or More RRUs Installed on a Wall in SideMounted Mode
Figure 3-30 shows the recommended clearances for three or more RRUs side-mounted on a
wall.
Figure 3-30 Recommended clearances for three or more RRUs installed on a wall in sidemounted mode
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3.5.3 Installation Spacing Between RRUs
This section describes the horizontal and vertical spacing between RRUs.
Recommended Horizontal Spacing Between RRUs
Figure 3-31 shows the recommended horizontal spacing between RRUs.
Figure 3-31 Recommended horizontal spacing between RRUs
Minimum Horizontal Spacing Between RRUs
Figure 3-32 shows the minimum horizontal spacing between RRUs.
Figure 3-32 Minimum horizontal spacing between RRUs
Recommended Vertical Spacing Between RRUs
Figure 3-33 shows the recommended vertical spacing between RRUs.
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Figure 3-33 Recommended vertical spacing between RRUs
Minimum Vertical Spacing Between RRUs
Figure 3-34 shows the minimum vertical spacing between RRUs.
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Figure 3-34 Minimum vertical spacing between RRUs
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4 Unpacking the Equipment
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:
Prevent them from colliding with doors, walls, shelves, or other objects.
Wear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweatsoaked gloves, or dirty gloves.
NOTICE
l After a cabinet or an BBU is unpacked, it must be powered on within 7 days.
l After an RRU is unpacked, it must be powered on within 24 hours.
Procedure
Step 1 Check the total number of articles in each case according to the packing list.
If ...
Then ...
The total number tallies with the packing
list
Go to Step 2.
The total number does not tally with the
packing list
Find out the cause and report any missing
articles to the local Huawei office.
Step 2 Check the exterior of the packing case.
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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.
Step 3 Check the type and quantity of the equipment in the cases according to the packing list.
If ...
Then ...
Types and quantity of the article tally with Sign the Packing List with the customer.
those on the packing list
Either shipment shortage, wrong shipment Report to the local Huawei office.
or damaged articles.
CAUTION
l To protect the equipment and prevent damage to the equipment, you are advised to keep the
unpacked equipment and packing materials indoors, take photos of the stocking environment,
packing case or carton, packing materials, and any rusted or eroded equipment, and then file
the photos.
l Verify that the insulation layers of all RRU cables are intact. If the insulation layers are
damaged or broken, water will penetrate into the cables, which may cause damages to RRUs
or human injury.
----End
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5 Installation Process
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
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6 Hoisting an RRU and Related Cables onto a Tower
Hoisting an RRU and Related Cables onto a
Tower
About This Chapter
This section describes the procedure for hoisting an RRU and related cables onto a tower and
the precautions that must be taken.
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 scenarios, the RRU can be installed on a pole, U-steel, or angle
steel.
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.
6.3 Hoisting Power Cables onto a Tower
This section describes the procedure for hoisting power cables onto a tower and the precautions
that must be taken.
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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 scenarios, the RRU can be installed on a pole, U-steel, or angle
steel.
Prerequisites
When the RRU is powered by an AC/DC power module, you need to install the AC/DC power
module onto the RRU before hoisting them onto a tower. For detailed operations, see AC/DC
Power Module User Guide or OPM15M User Guide.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
during the installation.
Procedure
Step 1 After climbing up to the tower, technician A secures the fixed pulley to the tower platform
support and leads the lifting sling through the fixed pulley.
Step 2 Technician C binds the mounting kits using the lifting sling and traction sling on the ground, as
shown in Figure 6-1. Then technician B pulls the lifting sling downwards, and technician C
pulls the traction sling outwards to protect the mounting kits from colliding with the tower.
Figure 6-1 Binding mounting kits for the RRU
(1) Lifting sling
(2) Traction sling
Step 3 Technician A catches the mounting kits and then unties the slings.
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Step 4 Install the mounting kits. For detailed operations, see steps 1 to 3 in 7.2.1 Installing a Single
RRU.
Step 5 Technician C binds the RRU using the lifting sling and traction sling, as shown in Figure 6-2.
The binding methods in Figure 6-3 and Figure 6-4 are incorrect.
Figure 6-2 Binding the RRU
(1) Lifting sling
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(2) Lifting eye
(3) Traction sling
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Figure 6-3 Incorrect binding method (1)
Figure 6-4 Incorrect binding method (2)
Step 6 Hoist the RRU onto the tower, as shown in Figure 6-5. Technician B pulls the lifting sling
downwards, and technician C pulls the traction sling outwards to protect the RRU from colliding
with the tower.
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Figure 6-5 Hoisting the RRU onto the tower
(1) Lifting sling
(2) Fixed pulley
(3) Traction sling
NOTICE
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 traction sling
(by the knot) must be less than or equal to 60 degrees.
l When hoisting the RRU and mounting kits onto a tower, protect them from colliding with
the tower and ground.
l Hoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.
Step 7 Technician A catches the RRU hoisted onto the tower.
Step 8 Technician A installs the RRU onto the main bracket and uses an inner hexagon torque
screwdriver to tighten the captive screw into the hole of the attachment plate and main bracket
to 5 N·m (44.25 lbf·in.). For detailed operations, see steps 4 and 5 in 7.2.1 Installing a Single
RRU.
Step 9 Untie the lifting sling and traction sling.
NOTE
The procedure for hoisting the RRU and its mounting kits onto the tower is for your reference only.
----End
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6 Hoisting an RRU and Related 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 8.1 Cabling Requirements.
Procedure
Step 1 Hoist the fiber optic cables onto the tower, as shown in Figure 6-6.
Figure 6-6 Hoisting fiber optic cables onto the tower
(2) Fixed pulley
(1) Lifting sling
(3) Traction sling
NOTICE
Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU or
BBU based on the labels on both ends of the cables and determine the hoisting direction.
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 places the fiber coiler for coiling fiber optic cables on the fiber
spools, and installation engineer D lead the lifting sling through the stretch sling of the fiber
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6 Hoisting an RRU and Related Cables onto a Tower
optic cables and use the other sling as a traction sling to secure the cables 4 m (13.12 ft)
away from the lifting sling, as shown in Figure 6-7.
Figure 6-7 Binding fiber optic cables
(1) Lifting sling
(2) Stretch sling
(3) Traction sling
NOTICE
Do not remove the stretch sling and protection pipe or bind fiber optic cables using one
sling, as shown in Figure 6-8.
Figure 6-8 Incorrect binding method
3.
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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.
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4.
6 Hoisting an RRU and Related Cables onto a Tower
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.
Step 2 Secure the fiber optic cables to the tower vertically using cable clips.
Step 3 Remove the lifting sling, traction sling, and protection pipe.
NOTE
The procedure for hoisting the fiber optic cables onto the tower is for your reference only.
----End
6.3 Hoisting Power Cables onto a Tower
This section describes the procedure for hoisting power cables onto a tower and the precautions
that must be taken.
Context
Cabling requirements for power cables are met. For details, see 8.1 Cabling Requirements.
The procedure for adding a connector to the RRU power cable on the RRU side is done under
the tower.
Procedure
Step 1 Hoist the power cables onto the tower, as shown in Figure 6-9.
Figure 6-9 Hoisting power cables onto the tower
(1) Lifting sling
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(2) Fixed pulley
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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.
NOTE
The connector on the power cable in the figure is only an example. The actual connector may vary
according to the situation.
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.).
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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.
NOTE
The procedure for hoisting the power cables onto the tower is for your reference only.
----End
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7 Installing the RRU
Installing the RRU
About This Chapter
This chapter describes the procedure for installing the RRU. The procedure for installing the
RRU varies depending on installation options.
7.1 Mounting Kits for an RRU
This section describes the bracket assembly and the attachment plate for an RRU.
7.2 Installing the RRU on a Pole
One or more RRUs can be installed on a pole.
7.3 Installing the RRU on U-steel
This section describes the procedure and precautions for installing the RRU on U-steel. U-steel
can be installed either on the ground or a tower and only one RRU can be installed on a piece
of U-steel. An RRU on U-steel is installed in standard mode by default.
7.4 Installing the RRU on Angle Steel
This section describes the procedure and precautions for installing the RRU on angle steel. Angle
steel can be installed either on the ground or a tower and only one RRU can be installed on a
piece of angle steel. An RRU on angle steel is installed in standard mode by default.
7.5 Installing the RRU on a Wall
This section describes the procedure and precautions for installing the RRU on a wall. An RRU
on a wall is installed in standard mode by default.
7.6 Installing an RRU on an IFS06
This section describes the procedure and precautions for installing an RRU on an IFS06.
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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 front and rear view of an RRU.
Figure 7-1 Front and rear view of an RRU
(1) Cover plate
(2) Attachment plate
Figure 7-2 shows the bracket assembly for an RRU.
Figure 7-2 Common RRU mounting kit
(1) Plastic cap
(2) Standard M10 nut
(3) Spring washer
(4) Thick flat washer
(5) M10x150 bolt
(6) Auxiliary bracket
(7) Hoist clamp on the main bracket
(8) Main bracket
7.2 Installing the RRU on a Pole
One or more RRUs can be installed on a pole.
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7.2.1 Installing a Single RRU
This section describes the procedure and precautions for installing a single RRU on a pole. A
single RRU can be installed on a pole in standard or side-mounted mode.
Prerequisites
Before you install an RRU on a tower, the RRU and mounting brackets are hoisted onto the
tower. For details, see 6.1 Hoisting an RRU onto a Tower.
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
during the installation.
Procedure
Step 1 Determine a position for installing the mounting bracket.
If the RRU must be installed on a pole secured on a tower, see 3.5.1 Clearance for a Single
RRU to determine a position.
If the RRU must be installed on a pole secured on the ground, see Figure 7-3 to determine
a position.
Figure 7-3 Distance between the mounting bracket and the ground
NOTE
It is recommended that the mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above
the ground.
Step 2 Loosen the two M10 nuts on the mounting brackets and move the M10x150 bolt out of the trough
on the auxiliary bracket, as shown in Figure 7-4.
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Figure 7-4 Moving the bolt out of the trough
Step 3 Slide the main and auxiliary brackets onto the pole and fit a bolt into the trough, as shown in
Figure 7-5.
Figure 7-5 Sliding the main and auxiliary brackets onto the pole
NOTICE
Ensure that the arrows on the main bracket are pointing up.
Step 4 Use a 16 mm (0.63 in.) torque wrench to tighten the two M10 nuts to 40 N·m (354.03 lbf·in.) so
that the main and auxiliary brackets are tightly secured onto the pole, as shown in Figure 7-6.
NOTICE
Tighten the nuts on the two bolts alternatively. After the main and auxiliary brackets are secured
properly, measure the spacing between the brackets on both sides and ensure that the spacing is
the same on the two sides.
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Figure 7-6 Securing the main and auxiliary brackets onto the pole
(1) Plastic cap
Step 5 Optional: If an RRU is to be installed in side-mounted mode, interchange the attachment plate
and stainless steel screws at the rear of the RRU with the cover plate and plastic screws on one
side of the RRU, as shown in Figure 7-7.
Figure 7-7 Interchanging the attachment plate at the rear of the RRU with the cover plate on
one side of the RRU
1.
Use an inner hexagon screwdriver to remove the attachment plate from the rear of the RRU.
2.
Remove the cover plate from one side of the RRU, and use a Phillips screwdriver to remove
the plastic screws from the RRU.
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3.
Install the plastic screws onto the rear of the RRU, and use a torque screwdriver to tighten
the screws to 0.25 N·m (2.21 lbf·in.).
4.
Install the cover plate onto the rear of the RRU.
5.
Install the attachment plate onto the side of the RRU, and use a torque screwdriver to tighten
the stainless steel screws on the attachment plate to 5 N·m (44.25 lbf·in.).
Step 6 Install the RRU onto the main bracket, as shown in Figure 7-8.
NOTE
This section describes the standard installation of an RRU. The method is similar for side-mounted
installation.
Figure 7-8 Installing the RRU onto the main bracket
----End
7.2.2 Installing Two RRUs
This section describes the procedure and precautions for installing two RRUs on a pole. On a
pole, two RRUs can be installed next to each other at the same level on a pole or vertically at
different levels.
Prerequisites
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
during the installation.
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Procedure
Installing two RRUs next to each other at the same level (recommended)
1.
Install one pair of main and auxiliary brackets on a pole. For details, see 7.2.1
Installing a Single RRU.
2.
Interchange the attachment plate and stainless steel screws at the rear of the RRU with
the cover plate and plastic screws on one side of the RRU, as shown in Figure 7-9.
Figure 7-9 Interchanging the attachment plate at the rear of the RRU with the cover
plate on one side of the RRU
(a) Use an inner hexagon screwdriver to remove the attachment plate from the rear of the RRU.
(b) Remove the cover plate from one side of the RRU, and use a Phillips screwdriver to remove the
plastic screws from the RRU.
(c) Install the plastic screws to the rear of the RRU, and use a torque screwdriver to tighten the
screws to 0.25 N·m (2.21 lbf·in.).
(d) Install the cover plate onto the rear of the RRU.
(e) Install the attachment plate to the side of the RRU, and use a torque screwdriver to tighten the
stainless steel screws on the attachment plate to 5 N·m (44.25 lbf·in.).
3.
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Install the first RRU onto the main bracket, as shown in Figure 7-10.
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Figure 7-10 Installing the first RRU onto the main bracket
4.
Install the second main bracket on one side of the first main bracket, as shown in
Figure 7-11.
Figure 7-11 Installing the second main bracket
5.
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Install the second RRU on the second main bracket, as shown in Figure 7-12.
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Figure 7-12 Installing the second RRU onto the second main bracket
Installing two RRUs independently
1.
Install the first RRU onto the main bracket, as shown in Figure 7-13. For details, see
7.2.1 Installing a Single RRU.
Figure 7-13 Installing the first RRU onto the main bracket
2.
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Install the second set of RRU mounting brackets above or below the first set of RRU
mounting brackets and maintain a space equal to or greater than the height of an RRU
between the two sets of brackets, as shown in Figure 7-14.
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Figure 7-14 Installing the second set of RRU mounting brackets
3.
Interchange the cover plate and plastic screws on the front of the second RRU with
the attachment plate and stainless steel screws at the rear of the second RRU, as shown
in Figure 7-15.
Figure 7-15 Interchanging the cover plate on the front of the second RRU with the
attachment plate at the rear of the second RRU
(a) Use an inner hexagon screwdriver to remove the attachment plate from the rear of the RRU.
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(b) Remove the cover plate from the front of the RRU, and use a Phillips screwdriver to remove
the plastic screws from the RRU.
(c) Install the plastic screws to the rear of the RRU, and use a torque screwdriver to tighten the
screws to 0.25 N·m (2.21 lbf·in.).
(d) Install the cover plate onto the rear of the RRU.
(e) Install the attachment plate to the front of the RRU, and use a torque screwdriver to tighten the
stainless steel screws on the attachment plate to 5 N·m (44.25 lbf·in.).
4.
Install the second RRU onto the main bracket, as shown in Figure 7-16.
NOTE
When you install two RRUs vertically at different levels and in different directions on a pole,
ensure that the cabling cavities of these two RRUs face the same direction.
Figure 7-16 Installing the second RRU onto the main bracket
(1) RRU installed in standard mode
(2) RRU installed in reverse mode
(3) Cabling cavity
----End
7.2.3 Installing Three or More RRUs
The section describes the procedure and precautions for installing three or more RRUs on a pole.
Before installing three or more RRUs together on a pole, move the attachment plates from the
front of the RRUs to the side of the RRUs.
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Prerequisites
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
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 the two RRUs, as shown in Figure 7-17. For the installation procedure, see "Installing
two RRUs next to each other at the same level" in 7.2.2 Installing Two RRUs.
Figure 7-17 Two RRUs installed on a pole
Step 2 Interchange the attachment plate and stainless steel screws at the rear of the RRU with the cover
plate and plastic screws on one side of the RRU, as shown in Figure 7-9.
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Figure 7-18 Interchanging the attachment plate at the rear of the RRU with the cover plate on
one side of the RRU
(a) Use an inner hexagon screwdriver to remove the attachment plate from the rear of the RRU.
(b) Remove the cover plate from one side of the RRU, and use a Phillips screwdriver to remove the plastic
screws from the RRU.
(c) Install the plastic screws to the rear of the RRU, and use a torque screwdriver to tighten the screws to 0.25
N·m (2.21 lbf·in.).
(d) Install the cover plate onto the rear of the RRU.
(e) Install the attachment plate to the side of the RRU, and use a torque screwdriver to tighten the stainless steel
screws on the attachment plate to 5 N·m (44.25 lbf·in.).
Step 3 Install the third main bracket, and install the third RRU on the third main bracket, as shown in
Figure 7-19.
NOTICE
When installing the third main bracket, ensure that the arrows on the main bracket are pointing
down.
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Figure 7-19 Installing the third RRU onto the third main bracket
Step 4 Install the second set of RRU mounting brackets above or below the first set of RRU mounting
brackets and maintain a space equal to or greater than the height of an RRU between the two
sets of brackets, as shown in Figure 7-20.
Figure 7-20 Installing the second set of RRU mounting brackets
Step 5 Install the fourth RRU onto the fourth main bracket, as shown in Figure 7-21.
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Figure 7-21 Installing the fourth RRU onto the fourth main bracket
----End
7.3 Installing the RRU on U-steel
This section describes the procedure and precautions for installing the RRU on U-steel. U-steel
can be installed either on the ground or a tower and only one RRU can be installed on a piece
of U-steel. An RRU on U-steel is installed in standard mode by default.
Prerequisites
Before you install an RRU on a tower, the RRU and mounting brackets are hoisted onto the
tower. For details, see 6.1 Hoisting an RRU onto a Tower.
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
during the installation.
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Context
Figure 7-22 shows the top view of the RRU installed on U-steel.
NOTICE
When the width of the narrower edges of the U-steel is less than 40 mm (1.57 in.), only the a
and b modes are supported.
Figure 7-22 Top view of the RRU
(1) U-steel
Procedure
Step 1 Determine a position for installing the mounting bracket.
If the RRU must be installed on U-steel secured on a tower, see 3.5.1 Clearance for a
Single RRU to determine a position.
If the RRU must be installed on U-steel secured on the ground, see Figure 7-23 to determine
a position.
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Figure 7-23 Distance between the main bracket and the ground
NOTE
It is recommended that the mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above
the ground.
Step 2 Loosen the two M10 nuts on the mounting brackets and move the M10x150 bolt out of the trough
on the auxiliary bracket, as shown in Figure 7-24.
Figure 7-24 Moving the bolt out of the trough
Step 3 Slide the main and auxiliary brackets onto the U-steel and fit a bolt into the trough, as shown in
Figure 7-25.
Figure 7-25 Sliding the main and auxiliary brackets onto the U-steel
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NOTICE
Ensure that the arrows on the main bracket are pointing up.
Step 4 Use a 16 mm (0.63 in.) torque wrench to tighten the two M10 nuts to 40 N·m (354.03 lbf·in.) so
that the main and auxiliary brackets are tightly secured onto the U-steel, as shown in Figure
7-26.
NOTICE
Tighten the nuts on the two bolts alternatively. After the main and auxiliary brackets are secured
properly, measure the spacing between the brackets on both sides and ensure that the spacing is
the same on the two sides.
Figure 7-26 Securing the main and auxiliary brackets onto the U-steel
(1) Plastic cap
Step 5 Install the RRU onto the main bracket, as shown in Figure 7-27.
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Figure 7-27 Installing the RRU onto the main bracket
----End
7.4 Installing the RRU on Angle Steel
This section describes the procedure and precautions for installing the RRU on angle steel. Angle
steel can be installed either on the ground or a tower and only one RRU can be installed on a
piece of angle steel. An RRU on angle steel is installed in standard mode by default.
Prerequisites
Before you install an RRU on a tower, the RRU and mounting brackets are hoisted onto the
tower. For details, see 6.1 Hoisting an RRU onto a Tower.
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
during the installation.
Context
Figure 7-28 shows the top view of the RRU installed on angle steel.
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Figure 7-28 Top view of the RRU
(1) Angle steel
Procedure
Step 1 Determine a position for installing the mounting bracket.
If the RRU must be installed on angle steel secured on a tower, see 3.5.1 Clearance for a
Single RRU to determine a position.
If the RRU must be installed on angle steel secured on the ground, see Figure 7-29 to
determine a position.
Figure 7-29 Distance between the mounting bracket and the ground
NOTE
It is recommended that the mounting bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above
the ground.
Step 2 Loosen the two M10 nuts on the mounting brackets and move the M10x150 bolt out of the trough
on the auxiliary bracket, as shown in Figure 7-30.
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Figure 7-30 Moving the bolt out of the trough
Step 3 Slide the main and auxiliary brackets onto the angle steel and fit a bolt into the trough, as shown
in Figure 7-31.
NOTICE
Ensure that the arrows on the main bracket are pointing up.
Figure 7-31 Sliding the main and auxiliary brackets onto the angle steel
Step 4 Use a 16 mm (0.63 in.) torque wrench to tighten the two M10 nuts to 40 N·m (354.03 lbf·in.) so
that the main and auxiliary brackets are tightly secured onto the angle steel, as shown in Figure
7-32.
NOTICE
Tighten the nuts on the two bolts alternatively. After the main and auxiliary brackets are secured
properly, measure the spacing between the brackets on both sides and ensure that the spacing is
the same on the two sides.
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Figure 7-32 Securing the main and auxiliary brackets onto the angle steel
(1) Plastic cap
Step 5 Install the RRU onto the main bracket, as shown in Figure 7-33.
Figure 7-33 Installing the RRU onto the main bracket
----End
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7.5 Installing the RRU on a Wall
This section describes the procedure and precautions for installing the RRU on a wall. An RRU
on a wall is installed in standard mode by default.
Prerequisites
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under the RRU to protect the RRU housing from damage
during the installation.
l When installing RRUs on a wall, do not combine the mounting brackets for multiple RRUs
together.
Context
The wall on which RRUs are installed must meet the following requirements:
For each RRU, the wall must be able to bear a weight four times the RRU's weight and the
bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.
Expansion bolts must be tightened to 15 N·m (132.76 lbf·in.) so that the bolts stay secured
without damaging the wall.
Procedure
Step 1 Remove the plastic cap, M10 nut, spring washer, thick flat washer, auxiliary bracket, and
M10x150 bolt one by one. Reserve the main bracket for the wall-mounted installation.
Step 2 Place the main bracket against the wall, use a level to verify that the main bracket is placed
horizontally, and use a maker to mark anchor points, as shown in Figure 7-34.
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Figure 7-34 Marking anchor points
(1) Main bracket
(2) RRU
NOTE
It is recommended that the main bracket be 1,200 mm (47.24 in.) to 1,600 mm (62.99 in.) above the ground.
Step 3 Figure 7-35 shows the expansion bolt assemblies. Drill holes at the anchor points, and then
install expansion bolt assemblies, as shown in Figure 7-36.
Figure 7-35 Expansion bolt assembly
(1) M8x85 bolt
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(2) Spring washer 8 (3) Plastic tube
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(5) Expansion tube
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Figure 7-36 Drilling a hole and inserting an expansion bolt assembly
1.
Use a hammer drill with a Ф12 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.).
NOTICE
Take proper safety measures to protect your eyes and respiratory tract against the dust
before drilling holes.
2.
Tighten an expansion bolt slightly and place it vertically into each hole.
3.
Hit the expansion bolt with a rubber mallet until the expansion tube completely enters the
hole.
4.
Partially tighten the expansion bolts clockwise.
5.
Rotate the bolts counterclockwise to loosen them, and remove each M8x85 bolt, spring
washer, plastic tube, and flat washer in sequence.
NOTE
After removing the expansion bolts, dispose of the plastic tubes.
Step 4 Use the removed flat washers, spring washers, and two M8x85 expansion bolts to secure the
main bracket onto the holes. Then use an M8 torque socket to tighten the expansion bolts with
a torque of 15 N·m (132.76 lbf·in.), as shown in Figure 7-37.
NOTICE
Ensure that the arrows on the main bracket are pointing down.
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Figure 7-37 Installing the main bracket
(1) M8x85 expansion bolt
(2) Spring washer
(3) Flat washer
Step 5 Install the RRU onto the main bracket, as shown in Figure 7-38.
Figure 7-38 Installing the RRU onto the main bracket
----End
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7.6 Installing an RRU on an IFS06
This section describes the procedure and precautions for installing an RRU on an IFS06.
Prerequisites
The hoist clamp on the main bracket is secured properly.
NOTICE
l Do not stand the RRU upright because the RF ports cannot support the weight of the RRU.
l Place a foam pad or cardboard under an RRU to protect the RRU housing from damage
during the installation.
Context
The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for
heights of RRUs.
RRUs can be installed on an IFS06 only when the ambient temperature is higher than or
equal to the lowest working temperature of the RRU and at least 5°C (41°F) lower than the
highest working temperature of the RRU. In this scenario, the IFS06 supports at least three
RRUs. When the ambient temperature is higher than or equal to the lowest working
temperature of the RRU and at least 10°C (50°F) lower than the highest working
temperature of the RRU, the IFS06 supports a maximum of six RRUs.
NOTE
For details about the operating temperature of the RRU, see section "Technical Specifications of
RRUs" in 3900 Series Base Station Technical Description.
Install RRUs in the sequence from bottom to top and from left to right.
This section describes how to install an RRU in height-unrestricted scenarios. The
procedure for installing an RRU in height-restricted scenarios is the same as that in heightunrestricted scenarios.
When installing the main bracket, you need to use the M10x50 bolts delivered with the
IFS06.
Rubber washers are easily compressed or broken, whereas do not need to be replaced.
Procedure
Step 1 Remove the plastic cap, M10 nut, spring washer, thick flat washer, auxiliary bracket, and
M10x150 bolt one by one. Reserve the main bracket on the IFS06.
Step 2 Use the M10x50 bolts delivered with the IFS06 to secure the main bracket to the IFS06, and
then use an M10 torque socket wrench to secure the bolts to 30 N·m (265.52 lbf·in.).
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NOTICE
Ensure that the arrows on the main bracket are pointing up.
Height-restricted scenarios
Use one finger to push and remove the rubber plugs on the beam and then install the main bracket,
as shown in Figure 7-39.
Figure 7-39 Installing the main bracket in height-restricted scenarios
(1) Spring washer
(2) Rubber washer
Height-unrestricted scenarios
Install the main bracket, as shown in Figure 7-40.
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Figure 7-40 Installing the main bracket in height-unrestricted scenarios
(1) Spring washer
(2) Rubber washer
Step 3 Interchange the attachment plate and stainless steel screws at the rear of the RRU with the cover
plate and plastic screws on one side of the RRU, as shown in Figure 7-9.
Figure 7-41 Interchanging the attachment plate at the rear of the RRU with the cover plate on
one side of the RRU
(a) Use an inner hexagon screwdriver to remove the attachment plate from the rear of the RRU.
(b) Remove the cover plate from one side of the RRU, and use a Phillips screwdriver to remove the plastic
screws from the RRU.
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(c) Install the plastic screws to the rear of the RRU, and use a torque screwdriver to tighten the screws to 0.25
N·m (2.21 lbf·in.).
(d) Install the cover plate onto the rear of the RRU.
(e) Install the attachment plate to the side of the RRU, and use a torque screwdriver to tighten the stainless steel
screws on the attachment plate to 5 N·m (44.25 lbf·in.).
Step 4 Install the RRU onto the main bracket, as shown in Figure 7-42.
Figure 7-42 Installing the RRU onto the main bracket
Step 5 Repeat the steps above to install RRUs on the lower level from left to right, as shown in Figure
7-43.
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Figure 7-43 Installing RRUs on the lower level
Step 6 Optional: When the ambient temperature is equal to or higher than the lowest operating
temperature of the RRU and at least 10°C (50°F) lower than the highest operating temperature
of the RRU, repeat the preceding steps to install the RRUs on the higher level, as shown in
Figure 7-44.
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Figure 7-44 Installing RRUs on the higher level
----End
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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.
8.4 RRU Cable List
This section describes RRU cable connections.
8.5 Installing an RRU PGND Cable
This section describes the procedure for installing an RRU PGND cable.
8.6 Installing an RRU RF Jumper
This section describes the procedure for installing an RRU RF jumper.
8.7 Installing an Inter-RRU RF Cable
This section describes the procedure for installing an inter-RRU RF cable.
8.8 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.
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.
8.10 Installing an RRU Power Cable
This section describes the procedure for installing an RRU power cable.
8.11 Installing a CPRI Fiber Optic Cable
This section describes the procedure for installing a CPRI fiber optic cable.
8.12 Installing an RRU Alarm Cable
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This section describes the procedure for installing an RRU alarm cable.
8.13 Closing the Cover Plate of an RRU Cabling Cavity
This section describes the procedure for closing the cover plate of an RRU cabling cavity.
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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
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.).
The bending radius of the 1/4'' jumper must be more than 35 mm (1.38 in.). The bending
radius of the super-flexible 1/2'' jumper must be more than 50 mm (1.97 in.), and the bending
radius of the ordinary 1/2'' jumper must be more than 127 mm (5 in.).
The bending radius of the power cable or PGND cable must be at least three times the
diameter of the cable.
The bending radius of a fiber optic cable is at least 20 times the diameter of the fiber optic
cable, and the minimum bending radius of the breakout cable at each end of the fiber optic
cable is 30 mm (1.18 in.).
The bending radius of the E1/T1 cable must be at least three times the diameter of the cable.
The bending radius of the signal cable must be at least five times the diameter of the cable.
Requirements for Cable Binding
The same types of cable must be bound together.
Different types of cable must be separately routed with the minimum spacing of 30 mm
(1.18 in.) and cannot be entangled.
The cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.
Cable ties are installed in the same direction, and those at the same horizontal line must be
in a straight line.
The excess of indoor cable ties is trimmed off, and the excess of outdoor cable ties allows
about 5 mm (0.2 in.), without remaining rough edges.
Labels or nameplates must be attached to both ends, joints, or turns of cables after they are
installed.
Security Requirements
Cables should be placed away from sharp objects or wall burrs. If these positions are
inevitable, protect the cables with protection pipes.
Cables must be routed away from heat sources, or heat-insulation materials are added
between cables and heat sources.
Sufficient slack (recommended for about 0.1 m [0.33 ft]) is provided in cables at turns or
the position close to a device, facilitating cable and device maintenance.
Indoor Cabling Requirements
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Cables are routed indoors through the feeder window.
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Drip loops must be made outside the feeder window, and the requirements for the minimum
bending radius are met.
When cables are routed indoors, engineers are required indoors for cooperation.
The feeder window must be waterproofed.
Outdoor Cabling Requirements
Cables routed outdoors must be led through a pipe when they may be damaged.
AC power cables, transmission cables, and cables buried in the ground must be protected.
If cables at the cabinet bottom need to be routed through a pipe along the ground, lead the
pipe into the cabinet base for about 30 mm (1.18 in.) to 50 mm (1.97 in.), not into the
cabinet. Block the pipe with waterproof tape or silicon gel, and secure the pipe to the cable
hole at the cabinet bottom with metal piece.
If cables at the cabinet bottom need to be routed through a pipe along the metal cable trough,
do not lead the pipe into the cabinet base. The cable trough must be sealed and routed
through the cable hole at the cabinet bottom.
When routing RRU cables, ensure that the highest positions of the routes of all RRU cables
(except RF cables and AISG cables) must be lower than the bottom of the RRU.
Cables are secured with cable clips.
Cables are routed neatly along the specified cabling direction and secured with cable clips.
The positions for cable clips are determined onsite. For example, the cable clips for the
7/8" feeder are installed at the spacing of 1.5 m (4.92 ft) to 2 m (6.56 ft) in the same direction,
and the cable clips for the power cables are installed at the spacing of 1.5 m (4.92 ft) to 2
m (6.56 ft) in the same direction.
Cable clips must be vertical with cables, and the cables in a cable clip must be parallel.
After routing cables neatly and correctly, tighten the screws on cable clips.
Secure cables on the cable tray, as shown in Figure 8-1.
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Figure 8-1 Securing cables on the cable tray
Secure cables on the tower, as shown in Figure 8-2.
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Figure 8-2 Securing cables on the tower
Special Cabling Requirements
Cabling Requirements for Power Cables
Power cables must be installed in the position specified in engineering design documents.
If the length of power cables is insufficient, replace the cables rather than adding connectors
or soldering joints to lengthen the cables.
Cables must be routed by only qualified and trained personnel before all preparations are
made.
Cables are routed in an untangled and orderly fashion.
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.
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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.
Cabling Requirements for PGND Cables
PGND cables for the base station must be connected to the same ground bar.
PGND cables must be buried in the ground or routed indoors. They should not be routed
overhead before they are led into the equipment room.
The exterior of the coaxial wire and the shield layer of the shielded cable must have proper
electrical contact with the metal surface of the equipment to which they are connected.
PGND cables and signal cables must be installed in an untangled and orderly fashion. A
certain distance must be reserved between them to prevent interference from each other.
Fuses or switches must not be installed on the PGND cables.
Other devices must not be used for electrical connections of the PGND cables.
All the metal parts in the housing of the equipment must be reliably connected to the ground
terminal.
Cabling Requirements for E1 Cables
E1 cables must not cross power cables, PGND cables, or RF cables when routed. If
transmission cables are routed with power cables, PGND cables, or RF cables in parallel,
the spacing between them must be greater than 30 mm (1.18 in.).
E1 cables are routed straightly and bound neatly with cable ties.
Sufficient slack is provided in E1 cables at turns.
E1 cables cannot be squeezed by the cabinet door when routed through the cabinet, as
shown in Figure 8-3.
Figure 8-3 E1 cables routed through the cabinet
Cabling Requirements for Fiber Optic Cables
Fiber optic cables must be routed by at least three qualified and trained personnel before
all preparations are made.
Fiber optic cables are used within the temperature range of -40°C to 60°C. If the current
temperature is out of the range, make protection measures or route the cables again.
Cables are routed in an untangled and orderly fashion.
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Do not bind fiber optic cables at turns.
Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the cables away
from sharp objects.
When fiber optic cables are routed, the excess of the cables must be coiled around special
devices, such as a fiber coiler.
An unarmored fiber optic cable must be bound using binding straps. If a fiber optic patch
cord needs to be secured in a cabinet or a piece of equipment, use binding straps to bind it
and then use cable ties to secure the binding straps to the cabinet or equipment. Ensure that
the fiber optic cables can flexibly move in the cable ties. Do not bend the fiber optic cables
sharply. The following figure shows how to bind the fiber optic cables correctly.
Figure 8-4 Binding fiber optic cables
When coiling fiber optic cables, apply even strength. Do not bend the cables with force.
Vacant optical connectors must be covered with dustproof caps.
Fiber optic cables cannot be squeezed by the cabinet door when routed through the cabinet,
as shown in Figure 8-5, Figure 8-6 and Figure 8-7.
Figure 8-5 CPRI fiber optic cables routed through the cabinet (1)
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Figure 8-6 CPRI fiber optic cables routed through the cabinet (2)
Figure 8-7 FE/GE cables routed through the cabinet
If fiber optic 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.
If fiber optic 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.
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
l A lower-level RRU obtains power directly from the external power system, but not from an upperlevel RRU using a power cable.
l The RRU3642 is a single-mode RRU. It only supports the cable connections shown in Figure 8-8 and
Figure 8-10.
l The RRU3642 does not support the inter-RRU cable connection shown in Figure 8-12.
Figure 8-8 shows the cable connections for a single RRU in the single-mode scenario.
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Figure 8-8 Cable connections for a single RRU in the single-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 8-9 shows the cable connections for a single RRU in the multimode scenario.
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Figure 8-9 Cable connections for a single RRU in the multimode 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 8-10 shows the cable connections for multiple RRUs in the single-mode scenario.
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Figure 8-10 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 8-11 shows the CPRI fiber optic cable connections for multiple RRUs in the multimode
scenario.
Figure 8-11 CPRI fiber optic cable connections for multiple RRUs in the multimode scenario
Figure 8-12 shows inter-RRU cable connections.
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Figure 8-12 Inter-RRU cable connections
(1) PGND cable
(2) RRU RF jumper
(3) Inter-RRU RF cable
(4) CPRI fiber optic cable
(5) RRU power cable
NOTE
l An RRU3942 can be interconnected with an RRU3804 or RRU3801E in the same sector using RX_IN/
OUT ports.
l When an RRU3942 is interconnected with an RRU3804 or RRU3801E, the ANT_TX/RXA port on
the RRU3942 and the ANT_TX/RXA port on the RRU3804 or RRU3801E must be connected to the
same antenna.
l When an RRU3942 is interconnected with an RRU3804 or RRU3801E, the ANT_RXC port on the
RRU3942 and the ANT_RXB port on the RRU3804 or RRU3801E do not need to be connected to an
antenna.
8.3 Installation Process
This section describes the process of installing RRU cables.
Figure 8-13 shows the process of installing RRU cables.
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Figure 8-13 Process of installing RRU cables
8.4 RRU Cable List
This section describes RRU cable connections.
Table 8-1 lists RRU cables.
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Table 8-1 RRU cables
Cable
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One End
The Other End
Connector
Installation
Position
Connector
Installation
Position
RRU PGND
Cable
OT terminal (M6,
16 mm2 or 0.025
in.2)
Ground
terminal on the
RRU
OT terminal
(M8, 16 mm2 or
0.025 in.2)
Ground terminal
on the ground bar
RRU Power
Cable
Tool-less female
connector
(pressfit type)
NEG(-) and
RTN(+) ports
on the RRU
Depending on the
power supply
equipment
External power
equipment
RRU Alarm
Cable
DB15 male
connector
EXT_ALM
port on the
RRU
Cord end
terminal
External alarm
device
CPRI Fiber
Optic Cable
(RRU3942
working in
multimode
scenarios)
DLC connector
CPRI0 port on
the RRU
DLC connector
CPRI port on a
board in the BBU
CPRI Fiber
Optic Cable
(RRU3942,
RRU3642
working in
single-mode
scenarios)
DLC connector
CPRI0 port on
the RRU
DLC connector
CPRI port on a
board in the BBU
RRU RF
Jumper
DIN male
connector
ANT_TX/
RXA,
ANT_TX/
RXB,
ANT_RXC, or
ANT_RXD
port on the
RRU
DIN male
connector
Antenna system
Inter-RRU
RF Cable
(RRU3942)
DB2W2
connector
RX_IN/OUT
port on the
RRU
DB2W2
connector
RX_IN/OUT port
on the RRU
RRU AISG
Multi-Wire
Cable
DB9 waterproof
male connector
RET port on
the RRU
Standard AISG
female connector
Standard AISG
male connector
on the RCU or on
the AISG
extension cable
CPRI1 port on
the RRU
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Cable
RRU AISG
Extension
Cable
One End
The Other End
Connector
Installation
Position
Connector
Installation
Position
Standard AISG
male connector
Standard AISG
female
connector on
the AISG
multi-wire
cable
Standard AISG
female connector
Standard AISG
male connector
on the RCU
8.5 Installing an RRU PGND Cable
This section describes the procedure for installing an RRU PGND cable.
Context
The 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 According to the actual cable route, cut the PGND cable into a proper length to prepare an RRU
PGND cable. Then add an OT terminal at each end of the cable according to the instructions in
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
8-14.
Figure 8-14 Installing an RRU PGND cable
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NOTE
Crimp OT terminals in correct positions, as shown in Figure 8-15.
Figure 8-15 Correct position of an OT terminal
Step 3 Label the installed cables according to the instructions in Attaching a Cable-Tying Label.
----End
8.6 Installing an RRU RF Jumper
This section describes the procedure for installing an RRU RF jumper.
Procedure
Step 1 Connect the DIN male connector at one end of the RRU RF jumper to the ANT port on the RRU,
and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure
8-16.
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Figure 8-16 Installing an RRU RF Jumper
NOTICE
On AC-powered electric railways, such as high speed railways, when leaky cables are connected
to RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRU
RF jumpers and the leaky cables to protect the RRUs against damage.
Step 2 Link the other end of the RF jumper to the external antenna system.
Step 3 Waterproof the connectors of the RF jumper by referring to Figure 8-17.
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Figure 8-17 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 length of the tape becomes twice its
original length.
l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.
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. Ensure that neighboring layers are stuck to each other.
l Ensure that the adhesive surface of the tape overlaps the lower layer.
l When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).
1.
Wrap three layers of waterproof tape on the connector, first from bottom up, then from top
down, and finally from bottom up. Start wrapping the connector at a position 50 mm (1.97
in.) away below the bottom of the connector to the top of the connector, first from bottom
up, then from top down, and finally from bottom up. Cut off the redundant tape after three
layers are wrapped. Wrap each layer of tape around the connector tightly.
2.
Wrap three layers of PVC insulation tape. Start the wrapping at a position 30 mm (1.18 in.)
away below the bottom of the waterproof tape to the top of the connector, first from bottom
up, then from top down, and finally from bottom up. Cut off the redundant tape after three
layers are wrapped. Wrap each layer of tape around the connector tightly.
3.
Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away
from one end of the PVC insulation tape.
Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must be
waterproofed, as shown in Figure 8-18.
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NOTICE
Do not remove dustproof caps from vacant antenna connectors.
Figure 8-18 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 length of the tape becomes twice its
original length.
l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.
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. Ensure that neighboring layers are stuck to each other.
l Ensure that the adhesive surface of the tape overlaps the lower layer.
l When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).
1.
Verify that dustproof caps are not removed.
2.
Wrap three layers of waterproof tape on the connector, first from bottom up, then from top
down, and finally from bottom up. Wrap each connector with three layers of waterproof
tape, from bottom up, then from top down, and finally from bottom up. Do not cut the tape
until all the three layers of the tape are already wrapped. Cut off the redundant tape after
three layers are wrapped. Wrap each layer of tape around the connector tightly.
3.
Wrap three layers of PVC insulation tape. Wrap each connector with three layers of
waterproof tape, from bottom up, then from top down, and finally from bottom up. Do not
cut the tape until all the three layers of the tape are already wrapped. Cut off the redundant
tape after three layers are wrapped. Wrap each layer of tape around the connector tightly.
4.
Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away
from one end of the PVC insulation tape.
Step 5 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable
ties to bind the cables.
Step 6 Label the installed cables according to the instructions in Attaching a Sign Plate Label.
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Step 7 Attach color-coding to the installed RF jumper according to the instructions in Attaching the
Color Ring.
----End
8.7 Installing an Inter-RRU RF Cable
This section describes the procedure for installing an inter-RRU RF cable.
Procedure
Step 1 Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RX_IN/OUT
port and remove the dustproof cap.
Step 2 Connect the DB2W2 connector at one end of the RF cable to the RX_IN/OUT port of an RRU,
and connect the other end to the RX_IN/OUT port of the other RRU, as shown in Figure
8-19.
Figure 8-19 Installing an inter-RRU RF cable
Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the DB2W2 connector to
0.4 N·m (3.54 lbf·in.).
Step 4 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable
ties to bind the cables.
Step 5 Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
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8.8 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.
Context
When the distance between an RRU and a Remote Control Unit (RCU) is longer than 5 m (16.4
ft.), an AISG multi-wire cable is not long enough to connect the RRU and the RCU. In this case,
an AISG extension cable is used to extend the AISG multi-wire cable.
Procedure
Install an AISG multi-wire cable that is not configured with an AISG extension cable.
1.
Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RET
port and remove the dustproof cap.
2.
Link the waterproofed DB9 connector at one end the AISG multi-wire cable to the
RET port on the RRU bottom, as shown in Figure 8-20.
Figure 8-20 Installing an RRU AISG multi-wire cable
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3.
Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof
DB9 connector to 0.4 N·m (3.54 lbf·in.).
4.
Connect the other end of the cable to the standard AISG male connector on the RCU.
5.
Route the cables according to the instructions in 8.1 Cabling Requirements, and then
use cable ties to bind the cables.
6.
Label the installed cables according to the instructions in Attaching an L-Shaped
Label.
Install an AISG multi-wire cable that is configured with an AISG extension cable.
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1.
Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RET
port and remove the dustproof cap.
2.
Link the waterproofed DB9 connector at one end of the AISG multi-wire cable to the
RET port on the RRU bottom, and link the other end to the standard AISG male
connector of the AISG extension cable, as shown in Figure 8-21.
Figure 8-21 Installing an RRU AISG multi-wire cable
3.
Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof
DB9 connector to 0.4 N·m (3.54 lbf·in.).
4.
Connect the other end of the AISG extension cable to the standard AISG male
connector on the RCU, as shown in Figure 8-22.
Figure 8-22 Installing an RRU AISG extension cable
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5.
Route the cables according to the instructions in 8.1 Cabling Requirements, and then
use cable ties to bind the cables.
6.
Label the installed cables according to the instructions in 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.
NOTICE
Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic
damage to the boards, modules, or electronic components.
Step 2 Loosen the protection screw on the cover plate of the RRU cabling cavity using an M4 Phillips
screwdriver, and then lower the handle to open the cover plate, as shown in Figure 8-23.
Figure 8-23 Opening the cover plate of the RRU cabling cavity
(1) Protection screw
Figure 8-24 shows the RRU cabling cavity.
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Figure 8-24 RRU cabling cavity
(1) Cover plate
(2) Cable diagram on labels
(3) Cable trough for the fiber optic
cable
(4) Cable trough for the power
cable
(5) Cable trough for the alarm cable (6) Waterproof block
(7) Clip
(8) Cabling cavity
Step 3 Loosen the screws on the clip using an M4 Phillips screwdriver, and open the clip, as shown
Figure 8-25.
NOTE
Open the clip only for the associated cable.
Figure 8-25 Opening clips
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Step 4 Remove the waterproof block.
NOTE
Remove only the waterproof blocks for the cables to be installed.
----End
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 a Tool-Less Female Connector (Pressfit Type) to the
RRU Power Cable on the RRU Side.
A connector or OT terminals are added to the RRU power cable on the power device side.
For details, see the DBS3900 Installation Guide.
Context
If a power device provided by the customer is used, the recommended specification of the circuit
breaker on this power device is 15 A to 30 A.
There are three types of RRU power cables in terms of cross-sectional areas: 5.3 mm2 (0.008
in.2) (10 AWG) and 8.2 mm2 (0.013 in.2) (8 AWG) complying with North American standards
and 6 mm2 (0.009 in.2) complying with European standards.
Table 8-2 describes the RRU power cable.
Table 8-2 RRU power cable
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Cable
On the RRU
Side
On the
Power
Device Side
Pow
er
Devi
ce
Color
RRU
power
cable
Tool-less female
connector
(pressfit type)
Tool-less
female
connector
(pressfit type)
EPU
A cable with a black jacket and two
wires inside
EPC5
connector
DCD
U-12
DCD
U-11
l North American standards: The
RTN(+) wire is black and the
RNEG(-) wire is blue.
l European standards: The RTN
(+) wire is brown and the RNEG
(-) wire is blue.
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CAUTION
Ensure that the RRU power cable must be connected to the RRU first and then to the power
device. The operations in the reverse sequence may cause component damage or personal injury.
Procedure
Step 1 Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to the
power supply socket on the RRU, as shown in Figure 8-26.
Figure 8-26 Installing an RRU power cable
NOTICE
Ensure that the exposed shield layer of the power cable is properly tightened using the clip.
Step 2 Connect the connector at the other end of the RRU power cable to the corresponding position
on the power device.
NOTE
l A DCDU-11B/DCDU-12B can supply power to a maximum of six RRUs. Ensure that the RRU power
cable is connected to one of LOAD0 to LOAD5 ports on the DCDU-11B/DCDU-12B.
l One EPU can supply power to a maximum of six RRUs. Ensure that the RRU power cable is connected
to one of RRU0 to RRU5 ports on the EPU.
l When the RRU power cable is connected to the EPU, the blue core wire in the tool-less female connector
(pressfit type) is connected to the upper port on the EPU, and the black/brown core wire is connected
to the lower port on the EPU.
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Step 3 Route the cable according to the instructions in 8.1 Cabling Requirements, and then use a cable
tie to bind the cable.
Step 4 Label the installed cable according to the instructions in Attaching a Cable-Tying Label.
----End
8.11 Installing a CPRI Fiber Optic Cable
This section describes the procedure for installing a CPRI fiber optic cable.
Prerequisites
Before the installation, single-mode optical modules can be distinguished from multi-mode
optical modules in either of the following ways:
SM and MM labels on an optical module: SM indicates a single-mode optical module, and
MM indicates a multi-mode optical module.
Color of the puller on an optical module: Blue indicates a single-mode optical module, and
black or gray indicates a multi-mode optical module.
NOTICE
The optical modules to be installed must match CPRI rates.
Context
A CPRI fiber optic cable transmits CPRI signals between a BBU and an RRU.
For details about CPRI fiber optic cable connections, see section "CPRI Cable Connections"
in the BBU3900 Hardware Description or DBS3900 Hardware Description.
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 8-27.
Figure 8-27 Installing an optical module
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NOTICE
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 8-28.
Figure 8-28 Installing a CPRI fiber optic cable
NOTICE
l To avoid any damage to fiber optic cables, the cables connected to the RRU must be installed
according to the installation process. For details about the installation process, see 8.3
Installation Process.
l If only one fiber optic cable is required, secure the fiber optic cable into the cable clip near
the power cable to leave some slack at the bend.
Step 3 Connect the end labeled 2A and 2B of the fiber optic cable to the optical module on the BBU
side.
Step 4 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable
ties to bind the cables.
Step 5 Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
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8.12 Installing an RRU Alarm Cable
This section describes the procedure for installing an RRU alarm cable.
Procedure
Step 1 Connect the DB15 connector at one end of the RRU alarm cable to the EXT_ALM port on the
RRU, as shown in Figure 8-29.
Figure 8-29 Installing an RRU alarm cable
Step 2 Connect the eight cord end terminals at the other end to external alarm devices.
Step 3 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable
ties to bind the cables.
Step 4 Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
8.13 Closing the Cover Plate of an RRU Cabling Cavity
This section describes the procedure for closing the cover plate of an RRU cabling cavity.
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Procedure
Step 1 Close the clips for the installed cables. Use an M4 torque screwdriver to tighten the screws on
each clip to 1.4 N·m (12.39 lbf·in.), as shown in Figure 8-30.
NOTICE
Ensure that the exposed shield layer of the power cable is properly tightened using the clip.
Figure 8-30 Closing clips
Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure
8-31.
NOTICE
Ensure that cables and waterproof blocks are properly inserted into troughs.
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Figure 8-31 Correct placement of waterproof blocks
Step 3 Close the cover plate of the RRU cabling cavity. Use an M4 torque screwdriver to tighten the
screws on the cover plate to 0.8 N·m (7.08 lbf·in.) in the sequence shown in Figure 8-32.
Figure 8-32 Closing the cover plate of an RRU cabling cavity
(1) Protection screw
Step 4 Take off the ESD gloves, and pack up all the tools.
----End
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9 Checking the RRU Hardware Installation
Checking the RRU Hardware Installation
After an RRU is installed, check the hardware installation.
Table 9-1 provides the checklist for the RRU hardware installation.
Table 9-1 Checklist for the RRU hardware installation
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SN
Item
The position for each device conforms to the engineering drawing and meets the
space requirement. Sufficient space is reserved for equipment maintenance.
The RRU is securely installed.
The cover plate is securely installed on the RRU cabling cavity.
Waterproof blocks are securely installed in vacant cable troughs of the RRU cabling
cavity, and the cover plate for the cabling cavity is securely installed. In addition,
vacant RF ports are covered with dustproof caps and the caps are tightened.
There are no connectors or joints on each power cable or PGND cable.
The terminals at two ends of each power cable or PGND cable are securely soldered
or crimped.
None of power cables and PGND cables can be short-circuited or reversely
connected. In addition, these cables are not damaged or broken.
Power cables and PGND cables are separately bound from other cables.
The protection grounding of the RRU and the surge protection grounding of the
building share one group of ground conductors.
10
The connectors of each signal cable are intact and securely linked, and these cables
are not damaged or broken.
11
Labels are correct, legible, and complete at both ends of each cable, feeder, and
jumper.
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10
Powering On an RRU
After all the devices are installed, check the power-on status of an RRU.
NOTICE
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 10-1 shows the RRU power-on check process.
NOTE
For details about how to power on an RRU, see Powering On an RRU. For details about how to power off
an RRU, see section "Powering-Off the RRU" in RRU Maintenance Guide.
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Figure 10-1 RRU power-on check process
(a) The normal input voltage of an RRU is -48 V DC. The voltage of the external power supply should range
from -36 V DC to -57 V DC.
(b) The RUN indicator on the RRU is on for 1s and off for 1s. The ALM indicator is steady off.
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11 Appendix
11
Appendix
About This Chapter
This section describes the procedure for adding an easy power receptacle (pressfit type)
connector.
11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the
RRU Side
This section describes the procedure for adding a tool-less female connector (pressfit type) to
the RRU power cable on the RRU side.
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11 Appendix
11.1 Adding a Tool-Less Female Connector (Pressfit Type)
to the RRU Power Cable on the RRU Side
This section describes the procedure for adding a tool-less female connector (pressfit type) to
the RRU power cable on the RRU side.
Context
Figure 11-1 shows the cable diagram on labels.
Figure 11-1 Cable diagram on labels
(1) Cable diagram on labels
Procedure
Step 1 Determine the length of the power cable for different operations based on the labels, as shown
in Figure 11-2.
Figure 11-2 Determining the length of the power cable
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Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 11-3.
Figure 11-3 Stripping the specified length of sheath
Step 3 Strip a specified length of sheath off each core wire. The length must be consistent with the
length of the notch in the tool-less female connector (pressfit type), as shown in Figure 11-4.
Figure 11-4 Stripping the sheath off each core wire
Figure 11-5 Matched length
Step 4 Add a tool-less female connector (pressfit type) to two core wires.
1.
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Tighten the screws using a Phillips screwdriver, as shown in Figure 11-6.
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Figure 11-6 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 tool-less female connector (pressfit type), and then
tighten the screws using a Phillips screwdriver, as shown in Figure 11-7.
Figure 11-7 Adding a tool-less female connector (pressfit type) to two core wires
Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as
shown in Figure 11-8.
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Figure 11-8 Stripping the sheath off the power cable
NOTICE
Each core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm
(0.059 [in.]), as shown in Figure 11-9.
Figure 11-9 Inserting core wires into the tool-less female connector (pressfit type)
----End
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