Huawei Technologies RRU32602G6 Remote Radio Unit User Manual Installation Guide
Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide
Contents
- 1. Installation Guide
- 2. Safety information
Installation Guide
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| Document ID | 3022722 |
| Application ID | e05ilaRB9dlwwN6mB4gu6g== |
| Document Description | Installation Guide |
| Short Term Confidential | No |
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| Document Type | User Manual |
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| Date Submitted | 2016-06-09 00:00:00 |
| Date Available | 2016-11-26 00:00:00 |
| Creation Date | 2015-12-22 21:42:53 |
| Producing Software | Antenna House PDF Output Library 6.2.680 (Windows) |
| Document Lastmod | 2015-12-22 21:42:53 |
| Document Title | Installation Guide |
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| Document Author: | Huawei Technologies Co., Ltd. |
RRU3260
Installation Guide
Issue
10
Date
2015-12-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2015. 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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Installation Guide
About This Document
About This Document
Purpose
This document describes the process of installing a DC blade RRU3260 (referred to as RRU
in this document).
Product Versions
The following table lists the product versions related to this document.
Product Name
Solution Version
Product Version
DBS3900
SRAN6.0 and later versions
V100R004C00 and later
versions
eRAN2.1 and later versions
V100R003C00 and later
versions
Intended Audience
This document is intended for:
Base station installation engineers
Organization
1 Changes in the RRU3260 Installation Guide
This chapter describes the changes in the RRU3260 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.
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Installation Guide
About This Document
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 (Optional) Installing the Plastic Shells of the RRU
This section describes the procedure for installing the plastic shells of the RRU.
7 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.
8 Installing the RRU
This chapter describes the procedure for installing the RRU. The procedure for installing the
RRU varies depending on installation options.
9 Installing RRU Cables
This chapter describes the procedure for installing RRU cables.
10 Checking the RRU Hardware Installation
After an RRU is installed, check the hardware installation.
11 Powering On an RRU
After all the devices are installed, check the power-on status of an RRU.
12 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.
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.
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Symbol
Description
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.
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Convention
Description
Boldface
The keywords of a command line are in boldface.
Italic
Command arguments are in italics.
[]
Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... }
Optional items are grouped in braces and separated 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.
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Convention
Description
[ 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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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 RRU3260 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..................................................................................................................................................................... 11
3.3 RRU Indicators............................................................................................................................................................. 14
3.4 Installation Scenarios....................................................................................................................................................16
3.5 Installation Clearance Requirements of an RRU..........................................................................................................24
3.5.1 Clearance for a Single RRU...................................................................................................................................... 24
3.5.2 Clearances for Three or More RRUs......................................................................................................................... 27
3.5.3 Installation Spacing Between RRUs..........................................................................................................................31
4 Unpacking the Equipment.........................................................................................................34
5 Installation Process..................................................................................................................... 36
6 (Optional) Installing the Plastic Shells of the RRU..............................................................37
7 Hoisting an RRU and Related Cables onto a Tower............................................................ 39
7.1 Hoisting an RRU onto a Tower.................................................................................................................................... 40
7.2 Hoisting Fiber Optic Cables onto a Tower................................................................................................................... 43
7.3 Hoisting Power Cables onto a Tower........................................................................................................................... 46
8 Installing the RRU.......................................................................................................................49
8.1 Mounting Kits for an RRU........................................................................................................................................... 50
8.2 Installing the RRU on a Pole........................................................................................................................................ 51
8.2.1 Installing a Single RRU............................................................................................................................................. 51
8.2.2 Installing Two RRUs................................................................................................................................................. 54
8.2.3 Installing Three or More RRUs................................................................................................................................. 58
8.3 Installing the RRU on U-steel...................................................................................................................................... 63
8.4 Installing the RRU on Angle Steel............................................................................................................................... 68
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Contents
8.5 Installing the RRU on a Wall........................................................................................................................................72
8.6 Installing an RRU on an IFS06.....................................................................................................................................78
9 Installing RRU Cables................................................................................................................ 85
9.1 Cabling Requirements.................................................................................................................................................. 87
9.2 Cable Connections........................................................................................................................................................ 93
9.3 Installation Process....................................................................................................................................................... 95
9.4 RRU Cable List............................................................................................................................................................ 96
9.5 Installing an RRU PGND Cable................................................................................................................................... 97
9.6 Installing an RRU RF Jumper...................................................................................................................................... 99
9.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable................................................................... 102
9.8 Installing an RRU Alarm Cable..................................................................................................................................104
9.9 Opening the Cover Plate of an RRU Cabling Cavity................................................................................................. 106
9.10 Installing an RRU Power Cable................................................................................................................................108
9.11 Installing a CPRI Fiber Optic Cable......................................................................................................................... 110
9.12 Closing the Cover Plate of an RRU Cabling Cavity.................................................................................................113
10 Checking the RRU Hardware Installation..........................................................................116
11 Powering On an RRU............................................................................................................. 118
12 Appendix................................................................................................................................... 120
12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side.......................121
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1 Changes in the RRU3260 Installation Guide
Changes in the RRU3260 Installation Guide
This chapter describes the changes in the RRU3260 Installation Guide.
10 (2015-12-30)
This is the tenth official release.
Compared with issue 09 (2015-08-30), this issue includes the following change:
Topic
Change Description
9.11 Installing a CPRI Fiber Optic Cable
Added the procedure of installing CPRI
optical cables for single-fiber bidirectional
optical modules.
Compared with issue 09 (2015-08-30), this issue does not include any new information and
no information is deleted from this issue.
09 (2015-08-30)
This is the ninth official release.
Compared with issue 08 (2015-03-23), this issue includes the following change:
Topic
Change Description
The whole document
Optimized the contents in this document.
Compared with issue 08 (2015-03-23), this issue does not include any new information and
no information is deleted from this issue.
08 (2015-03-23)
This is the eighth official release.
Compared with issue 07 (2014-11-10), this issue includes the following change:
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1 Changes in the RRU3260 Installation Guide
Topic
Change Description
The whole document
Added security related precautions.
Compared with issue 07 (2014-11-10), this issue does not include any new information and no
information is deleted from this issue.
07 (2014-11-10)
This is the seventh official release.
Compared with issue 06 (2014-10-24), this issue includes the following change:
Topic
Change Description
9.10 Installing an RRU Power Cable
Modified the precautions in the background
information.
12.1 Adding a Tool-Less Female
Connector (Pressfit Type) to the RRU
Power Cable on the RRU Side
Added the precaution that do not reversely
connect the positive and negative poles in
the procedure.
Compared with issue 06 (2014-10-24), this issue does not include any new information and
no information is deleted from this issue.
06 (2014-10-24)
This is the sixth official release.
Compared with issue 05 (2014-06-30), this issue includes the following change:
Topic
Change Description
3.4 Installation Scenarios
Optimized the description of restrictions.
8 Installing the RRU
Optimized the description of the distance
between the mounting kit and the ground.
Compared with issue 05 (2014-06-30), this issue does not include any new information and
no information is deleted from this issue.
05 (2014-06-30)
This is the fifth official release.
Compared with issue 04 (2013-12-30), this issue includes the following change:
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Topic
Change Description
3.5.1 Clearance for a Single RRU
Added the clearance for a single RRU or
multiple RRUs on the bitumen ground.
3.5.2 Clearances for Three or More RRUs
Installing an RRU Alarm Cable
Added notes under the procedure.
3.4 Installation Scenarios
Added restrictions on RRU mounting kits in
assembled installation mode.
Compared with issue 04 (2013-12-30), this issue does not include any new information and
no information is deleted from this issue.
04 (2013-12-30)
This is the fourth official release.
Compared with issue 03 (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 03 (2013-12-23), this issue does not include any new information and
no information is deleted from this issue.
03 (2013-12-23)
This is the third official release.
Compared with issue 02 (2013-06-26), this issue includes the following change:
Topic
Change Description
7.1 Hoisting an RRU onto a Tower
Optimized the procedure for hoisting an
RRU onto a Tower.
Compared with issue 02 (2013-06-26), this issue does not include any new information and
no information is deleted from this issue.
02 (2013-06-26)
This is the second official release.
Compared with issue 01 (2013-04-28), this issue includes the following change:
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1 Changes in the RRU3260 Installation Guide
Topic
Change Description
9.10 Installing an RRU Power Cable
Added the power device DCDU-12B for the
RRU.
Compared with issue 01 (2013-04-28), this issue does not include any new information and
no information is deleted from this issue.
01 (2013-04-28)
This is the first official release.
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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:
Safety Information
RRU3260 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.
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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.)
Level
Torque screwdriver
Torque socket
5 mm
5 mm
(M3 to M6)
(M3 to M6)
Multimeter
Marker (diameter ≤ 10 mm
[0.39 in.])
Measuring tape
Inner hexagon wrench
Fixed pulley(weightbearing capacity > 500 kg
or 1102.5 lb)
Lifting sling
5 mm
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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3 Information About the Installation
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
You can obtain the RRU frequency band and power supply information from the
configuration label on the cover plate and obtain the RRU name from the nameplate on the
side of RRU that accommodates the conversion bracket. Figure 3-3 shows the positions of the
configuration label and nameplate on the RRU.
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NOTE
The actual label and nameplate may differ from what is shown in the figure.
Figure 3-3 Positions of the label and nameplate
(1) Configuration label
(2) Nameplate
(3) Frequency band
(4) Power supply type
(5) Module name
3.2 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
Figure 3-4 shows the ports on the RRU panels.
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Figure 3-4 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
Item
Silkscreen
Remarks
(1) Ports in the
cabling cavity
RTN(+)
Power supply socket
(2) Ports at the
bottom
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NEG(-)
CPRI0
Optical/electrical port 0, connected to the
BBU
CPRI1
Optical/electrical port 1, reserved
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
(3) Indicators
Silkscreen
Remarks
EXT_ALM
Alarm monitoring port used for monitoring
one RS485 signal and two dry contact
signals
RET
Communication port for the RET antenna,
supporting RET signal transmission
RUN
See 3.3 RRU Indicators.
ALM
ACT
VSWR
CPRI0
CPRI1
NOTE
The port for transmitting RET signals is determined by the software.
Table 3-2 describes how to use RF ports.
Table 3-2 Usage of RF ports
Product Version
TX/RX
Channe
Number
of Used
RF Ports
Usage
Remarks
DBS3900 LTE
V100R003C00 and
later versions
1x
2T4R
ANT_TX/RXA, ANT_TX/
RXB, ANT_RXC, and
ANT_RXD are used
together for one sector, with
ANT_TX/RXA and
ANT_RXC combined and
ANT_TX/RXB and
ANT_RXD combined.
A single
sector
Figure 3-5 shows the recommended usage of the RF ports on an RRU used for DBS3900 LTE
V100R003C00 and later versions.
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Figure 3-5 Recommended usage of the RF ports on an RRU used for DBS3900 LTE
V100R003C00 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 3-3 describes RRU indicators.
Table 3-3 RRU indicators
Indicator
Color
Status
Meaning
RUN
Green
Steady on
There is power supply, but the module is
faulty.
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.
ALM
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Red
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Indicator
ACT
VSWR
CPRI0
CPRI1
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Color
Green
Red
Red or
green
Red or
green
Status
Meaning
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.
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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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
Application scenarios:
To ensure proper heat dissipation of the RRU, the following requirements must be met:
The RRU cannot be installed in an enclosed cabinet without a cooling system.
The RRU cannot be installed in an enclosed camouflage box.
The RRU cannot be installed in an enclosed equipment room without a cooling system.
When multiple RRUs are installed in centralized mode, the minimum clearance
requirements must be met. For details about the minimum clearance requirements, see
3.5.2 Clearances for Three or More RRUs and 3.5.3 Installation Spacing Between
RRUs.
RRU mounting kits in assembled installation mode are not allowed in indoor scenarios.
NOTICE
If the RRU is improperly installed, heat dissipation of the RRU deteriorates and the RRU may
not work properly, as shown in Figure 3-6.
Figure 3-6 Improperly installed RRUs
Method of installation:
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The installation supports' specifications described in this document are only based on the
exterior and dimensions of the mounting kits. Before installing equipment, assess the
strength and reliability of the installation support to determine whether it can bear the
weight of the equipment.
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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 3-7.
On a tower, an RRU can be installed on a pole, angle steel, or U-steel. The side-mounted
installation mode (one side instead of the rear of an RRU is mounted on the support) is
recommended for RRUs on the main pole secured on a tower. This installation mode
allows multiple RRUs to be installed next to each other at the same level on a pole.
When the horizontal distance between the main and auxiliary poles on a tower is equal to
or greater than 810 mm (23.62 in.), the side-mounted mode is recommended for
installing RRUs on the auxiliary pole to meet the minimum clearance requirements.
Otherwise, the standard mode is recommended for installing RRUs on the auxiliary pole.
Figure 3-7 Requirements for the vertical deviation angle of an RRU
(1) RRU
(2) Installation support (pole, U-steel, angle steel, or wall)
Installing an RRU on a Pole
Figure 3-8 shows the diameter of a pole for installing an RRU.
Figure 3-8 Diameter of a pole
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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.).
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 and the side-mounted
installation is recommended.
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.
Figure 3-9 shows a single RRU installed on a pole.
Figure 3-9 A single RRU installed on a pole
Figure 3-10 shows two RRUs installed on a pole.
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Figure 3-10 Two RRUs installed on a pole
Installing an RRU on U-steel
Figure 3-11 shows U-steel specifications.
Figure 3-11 U-steel specifications
NOTICE
U-steel supports the standard or reverse installation of a single RRU only.
Figure 3-12 shows an RRU installed on U-steel.
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Figure 3-12 RRU installed on U-steel
Installing an RRU on Angle Steel
Figure 3-13 shows angle steel specifications.
Figure 3-13 Angle steel specifications
NOTICE
Angle steel supports the standard or reverse installation of a single RRU only.
Figure 3-14 shows an RRU installed on angle steel.
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Figure 3-14 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 anchor bolts must be tightened to 30 N·m (265.52 lbf·in.) so that the bolts
stay secured without damaging the wall.
NOTICE
l It is recommended that the RRU be installed on a wall in standard mode.
l When RRUs are installed on a wall in side-mounted mode, do not combine mounting
brackets for multiple RRUs, as shown in Figure 3-15.
Figure 3-15 Correct installation of mounting brackets for multiple RRUs installed on a wall
in side-mounted mode
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Figure 3-16 shows an RRU installed on a wall.
Figure 3-16 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 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 3-17.
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Figure 3-17 Correct installation of mounting brackets for RRUs installed on an IFS06
Figure 3-18 and Figure 3-19 show RRUs installed on an IFS06.
Figure 3-18 Three RRUs installed on an IFS06
(1) Height-restricted scenario
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Figure 3-19 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.
NOTICE
If an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm or
more as recommended) away from the bitumen ground. The following describes the space
requirements for installing a single RRU on the non-bitumen ground.
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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.
Clearance for a Single RRU in Standard or Reverse Mode
Figure 3-20 shows the clearance for a single RRU in standard or reverse mode.
Figure 3-20 Clearance for a single RRU in standard or reverse mode
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Clearance for a Single RRU in Side-Mounted Mode
Figure 3-21 shows the clearance for a single RRU in side-mounted mode.
Figure 3-21 Clearance for a single RRU in side-mounted mode
Clearance for a Single Tower-mounted RRU
Figure 3-22 and Figure 3-23 show the clearance for a single tower-mounted RRU in standard
or reverse mode and in side-mounted mode, respectively.
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Figure 3-22 Minimum clearance for a single tower-mounted RRU in standard or reverse
mode
Figure 3-23 Minimum clearance for a single tower-mounted RRU in side-mounted mode
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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NOTICE
If an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm or
more as recommended) away from the bitumen ground. The following describes the space
requirements for installing multiple RRUs on the non-bitumen ground.
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 3-24 shows the recommended clearances for multiple RRUs installed in centralized
mode.
Figure 3-24 Recommended clearances for three or more RRUs installed on a pole
Minimum Clearances for Three or More RRUs Installed on a Pole
Figure 3-25 shows the minimum clearances for multiple RRUs installed in centralized mode.
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Figure 3-25 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 3-26 shows the recommended clearances for multiple RRUs installed on a wall in
standard mode.
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Figure 3-26 Recommended clearances for three or more RRUs installed on a wall in standard
mode
Minimum Clearances for Three or More RRUs Installed on a Wall in Standard
Mode
Figure 3-27 shows the minimum clearances for three or more RRUs installed on a wall in
standard mode.
Figure 3-27 Minimum clearances for three or more RRUs installed on a wall in standard
mode
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Recommended Clearances for Three or More RRUs Installed on a Wall in SideMounted Mode
Figure 3-28 shows the recommended clearances for three or more RRUs side-mounted on a
wall.
Figure 3-28 Recommended clearances for three or more RRUs installed on a wall in sidemounted mode
3.5.3 Installation Spacing Between RRUs
This section describes the horizontal and vertical spacing between RRUs.
Recommended Horizontal Spacing Between RRUs
Figure 3-29 shows the recommended horizontal spacing between RRUs.
Figure 3-29 Recommended horizontal spacing between RRUs
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Minimum Horizontal Spacing Between RRUs
Figure 3-30 shows the minimum horizontal spacing between RRUs.
Figure 3-30 Minimum horizontal spacing between RRUs
Recommended Vertical Spacing Between RRUs
Figure 3-31 shows the recommended vertical spacing between RRUs.
Figure 3-31 Recommended vertical spacing between RRUs
Minimum Vertical Spacing Between RRUs
Figure 3-32 shows the minimum vertical spacing between RRUs.
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Figure 3-32 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,
sweat-soaked 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 those on the packing list
Sign the Packing List with the customer.
Either shipment shortage, wrong
shipment or damaged articles.
Report to the local Huawei office.
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 (Optional) Installing the Plastic Shells of the RRU
(Optional) Installing the Plastic Shells of
the RRU
This section describes the procedure for installing the plastic shells of the RRU.
Context
An RRU is equipped with a plastic shell only when necessary.
Procedure
Step 1 Use an M6 Phillips screwdriver to loosen the two screws on the metal sheet of the RRU and
remove the metal sheet, as shown in Figure 6-1.
Figure 6-1 Removing the metal sheet
(1) Screw
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6 (Optional) Installing the Plastic Shells of the RRU
Step 2 Install a buckle on each side at the bottom of the RRU, and use an M4 torque wrench to
tighten the screws on the buckles to 1.4 N·m (12.39 lbf·in.), as shown in Figure 6-2.
Figure 6-2 Installing buckles at the bottom
(1) Buckle
(2) Screw
Step 3 Use four hex screws to secure the plastic shells onto the RRU and use an M6 hex key wrench
to tighten the screws to 2.8 N·m (24.78 lbf·in.), as shown in Figure 6-3.
Figure 6-3 Installing the plastic shells of the RRU
----End
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7 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.
7.1 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.
7.2 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.
7.3 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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7 Hoisting an RRU and Related Cables onto a Tower
7.1 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 Place a foam pad or cardboard on the ground to protect the housing of the RRU from
damage before the binding. Do not stand the RRU upright because the RF ports cannot
support the weight of the RRU.
l The routing and protection of power cables should follow the local safety regulations,
industry standards, and enterprise standards of the operator.
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 7-1. 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 7-1 Binding mounting kits for the RRU
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(1) Lifting sling
(2) Traction sling
Step 3 Technician A catches the mounting kits and then unties the slings.
Step 4 Install the mounting kits. For detailed operations, see steps 1 to 3 in 8.2.1 Installing a Single
RRU.
Step 5 Technician C binds the RRU using the lifting sling and traction sling, as shown in Figure 7-2.
The binding methods in Figure 7-3 and Figure 7-4 are incorrect.
Figure 7-2 Binding the RRU
(1) Handle
(2) Lifting sling
(3) Traction eye
(4) Traction sling
Figure 7-3 Incorrect binding method (1)
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Figure 7-4 Incorrect binding method (2)
Step 6 Hoist the RRU onto the tower, as shown in Figure 7-5. Technician B pulls the lifting sling
downwards, and technician C pulls the traction sling outwards to protect the RRU from
colliding with the tower.
Figure 7-5 Hoisting the RRU onto the tower
(1) Lifting sling
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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.).
l When hoisting each device onto a tower, protect them from colliding with the tower.
l Hoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.
l Do not hoist any thing by the traction eye.
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 8.2.1 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
7.2 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 9.1 Cabling Requirements.
Procedure
Step 1 Hoist the fiber optic cables onto the tower, as shown in Figure 7-6.
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Figure 7-6 Hoisting fiber optic cables onto the tower
(1) Lifting sling
(2) Fixed pulley
(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 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 7-7.
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Figure 7-7 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 7-8.
Figure 7-8 Incorrect binding method
3.
Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m
(49.21 ft) per minute to coil the fiber optic cables.
4.
Installation engineer C pulls the lifting sling downwards, and installation engineer D
pulls the traction sling outwards to protect the fiber optic cables from colliding with the
tower.
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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
7.3 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 9.1 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 7-9.
Figure 7-9 Hoisting power cables onto the tower
(1) Lifting sling
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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 7-10.
NOTE
The connector on the power cable in the figure is only an example. The actual connector may vary
according to the situation.
Figure 7-10 Binding cable ties
3.
Installation engineer B wraps the power cable connector with a layer of PVC insulation
tape, as shown in Figure 7-11.
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 7-11 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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8 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.
8.1 Mounting Kits for an RRU
This section describes the bracket assembly and the attachment plate for an RRU.
8.2 Installing the RRU on a Pole
One or more RRUs can be installed on a pole.
8.3 Installing the RRU on U-steel
This section describes the procedure and precautions for installing the RRU on U-steel. An
RRU can be installed on U-steel secured on the ground or a tower. Each piece of U-steel
allows only one RRU to be installed in standard or reverse mode.
8.4 Installing the RRU on Angle Steel
This section describes the procedure and precautions for installing the RRU on angle steel. An
RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle
steel allows only one RRU to be installed in standard or reverse mode.
8.5 Installing the RRU on a Wall
This section describes the procedure and precautions for installing the RRU on a wall.
8.6 Installing an RRU on an IFS06
This section describes the procedure and precautions for installing an RRU on an IFS06.
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8 Installing the RRU
8.1 Mounting Kits for an RRU
This section describes the bracket assembly and the attachment plate for an RRU.
Figure 8-1 shows the front and side of an RRU.
Figure 8-1 Front and side view of an RRU
(1) Front view
(2) Side view
(3) Attachment plate
Figure 8-2 shows the bracket assembly for an RRU.
Figure 8-2 12 L blade RRU mounting kit
(1) Plastic cap
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(2) Standard M10
nut
(3) Spring washer (4) Thick flat washer
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(6) Hoist clamp on
the main bracket
(7) Main bracket
(8) Inner hexagon (9) Pole installation
screw
bracket
(10) Auxiliary
bracket
8.2 Installing the RRU on a Pole
One or more RRUs can be installed on a pole.
8.2.1 Installing a Single RRU
This section describes the procedure and precautions for installing a single RRU on a pole.
Prerequisites
Before you install an RRU on a pole secured on a tower, the RRU and its mounting brackets
are hoisted onto the tower. For details, see 7.1 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 brackets.
If the pole must be installed on a tower, determine a position for installing the mounting
brackets according to the instructions in 3.5.1 Clearance for a Single RRU.
If the pole must be installed on the ground, determine a position for installing the
mounting brackets according to Figure 8-3.
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Figure 8-3 Distance between the mounting brackets and the ground
NOTE
As shown in the figure above, it is recommended that the mounting kits be installed at a position
1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient,
only the 3.5 Installation Clearance Requirements of an RRU needs to be provided.
Step 2 Install the RRU mounting brackets, as shown in Figure 8-4.
Figure 8-4 Installing the RRU mounting brackets
NOTE
Verify that the arrows on the mounting brackets are pointing up.
1.
Adjust the position of the nut and remove one end of the square-neck bolt from the slot
on the auxiliary bracket.
2.
Slide the mounting brackets onto the pole horizontally and insert the square-neck bolt
into the slot.
Step 3 Use a 16 mm (0.63 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so
that the mounting brackets are secured onto the pole, as shown in Figure 8-5.
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NOTICE
Tighten the nuts on the two square-neck 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 8-5 Securing the RRU mounting brackets
Step 4 Install the RRU onto the main bracket, as shown in Figure 8-6.
Figure 8-6 Installing the RRU onto the main bracket
Step 5 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top
of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate
and main bracket are firmly secured, as shown in Figure 8-7.
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Figure 8-7 Securing the captive screw into the connection hole
----End
8.2.2 Installing Two RRUs
This section describes the procedure and precautions for installing two RRUs on a pole.
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.
Procedure
Step 1 Install the first RRU onto the main bracket, as shown in Figure 8-8. For details, see 8.2.1
Installing a Single RRU.
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Figure 8-8 Installing the first RRU onto the main bracket
Step 2 Use an M6 inner hexagon screwdriver to remove the four inner hexagon screws from the
second set of mounting brackets, and remove the main bracket from the auxiliary bracket, as
shown in Figure 8-9.
Figure 8-9 Removing the RRU main bracket
(1) Main bracket
(2) Pole installation bracket
Step 3 Install the removed main bracket on one side of the first main bracket, as shown in Figure
8-10.
NOTICE
The second main bracket must be installed with the opening ends of U-shaped slots on both
sides facing downwards.
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Figure 8-10 Installing the second main bracket
(1) Removed main bracket
NOTE
The main mounting bracket for installing a 12 L blade RRU can connect to the main mounting bracket
for installing a common RRU in the scenarios of adding RRUs, as shown in Figure 8-11.
Figure 8-11 Connect to the main mounting bracket for installing a common RRU
(1) Main mounting bracket for a 12 L blade RRU
(2) Main mounting bracket for a common RRU
Step 4 Install the second RRU onto the main bracket, as shown in Figure 8-12.
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Figure 8-12 Installing the second RRU onto the main bracket
NOTICE
After installing each RRU on its main bracket, use an inner hexagon torque screwdriver to
tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m
(44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in
Figure 8-13.
Figure 8-13 Securing the captive screw into the connection hole
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Step 5 Install the metal sheet for neighboring RRUs, as shown in Figure 8-14.
Figure 8-14 Installing the metal sheet
(1) Screw
(2) Metal sheet
1.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet farther from the
handle of the second RRU and remove the screw.
2.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet closer to handle of
the second RRU. Then rotate the metal sheet to align the vacant hole in the metal sheet
with a hole on the top of the first RRU.
3.
Insert the removed screw into the hole on the top of the first RRU and use an M6 torque
screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).
----End
8.2.3 Installing Three or More RRUs
The section describes the procedure and precautions for installing three or more RRUs on a
pole.
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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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.
NOTICE
Modules can be combined only when installed on one or more poles, and a maximum of three
modules can be combined.
Procedure
Step 1 Install the two RRUs, as shown in Figure 8-15. For details, see 8.2.2 Installing Two RRUs.
Figure 8-15 Two RRUs installed on a pole
Step 2 Use an M6 inner hexagon screwdriver to remove the four inner hexagon screws from the
second set of mounting brackets, and remove the main bracket from the auxiliary bracket, as
shown in Figure 8-16.
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Figure 8-16 Removing the RRU main bracket
(1) Main bracket
(2) Pole installation bracket
Step 3 Install the third main bracket and install the third RRU onto the third main bracket. Then use
an inner hexagon torque screwdriver to tighten the captive screw into the connection holes on
the top of the attachment plate and main bracket for the RRU, with a torque of 5 N·m (44.25
lbf·in.), as shown in Figure 8-17.
NOTICE
The third main bracket must be installed with the opening ends of U-shaped slots on both
sides facing downwards.
Figure 8-17 Installing the third RRU onto the third main bracket
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NOTE
The main mounting bracket for installing a 12 L blade RRU can connect to the main mounting bracket
for installing a common RRU in the scenarios of adding RRUs, as shown in Figure 8-11.
Figure 8-18 Connect to the main mounting bracket for installing a common RRU
(1) Main mounting bracket for a 12 L blade RRU
(2) Main mounting bracket for a common RRU
Step 4 Install the metal sheet for neighboring RRUs, as shown in Figure 8-19.
Figure 8-19 Installing the metal sheet
(1) Screw
1.
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(2) Metal sheet
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet farther from the
handle of the first RRU and remove the screw.
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2.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet closer to handle of
the first RRU. Then rotate the metal sheet to align the vacant hole in the metal sheet with
a hole on the top of the third RRU.
3.
Insert the removed screw into the hole on the top of the third RRU and use an M6 torque
screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).
Step 5 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 80 mm (3.15 in.) between the
two sets of brackets, as shown in Figure 8-20.
Figure 8-20 Installing the second set of RRU mounting brackets
Step 6 Install the fourth RRU onto the fourth main bracket, use an inner hexagon torque screwdriver
to tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m
(44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in
Figure 8-21.
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Figure 8-21 Installing the fourth RRU onto the fourth main bracket
----End
8.3 Installing the RRU on U-steel
This section describes the procedure and precautions for installing the RRU on U-steel. An
RRU can be installed on U-steel secured on the ground or a tower. Each piece of U-steel
allows only one RRU to be installed in standard or reverse mode.
Prerequisites
Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets
are hoisted onto the tower. For details, see 7.1 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 8-22 shows the top view of the RRU installed on U-steel.
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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 8-22 Top view of the RRU
(1) U-steel
Procedure
Step 1 Determine a position for installing the mounting brackets.
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 8-23 to
determine a position.
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Figure 8-23 Distance between the mounting brackets and the ground
NOTE
As shown in the figure above, it is recommended that the mounting kits be installed at a position
1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient,
only the 3.5 Installation Clearance Requirements of an RRU needs to be provided.
Step 2 Install the RRU mounting brackets, as shown in Figure 8-24.
Figure 8-24 Installing the RRU mounting brackets
NOTE
Verify that the arrows on the mounting brackets are pointing up.
1.
Adjust the position of the nut and remove one end of the square-neck bolt from the slot
on the auxiliary bracket.
2.
Slide the mounting brackets onto the U-steel horizontally and insert the square-neck bolt
into the slot.
Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so
that the mounting brackets are secured onto the U-steel, as shown in Figure 8-25.
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NOTICE
Tighten the nuts on the two square-neck 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 8-25 Securing the RRU mounting brackets
Step 4 Use an inner hexagon screwdriver to remove the attachment plate from one side of the RRU,
reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws to
5 N·m (44.25 lbf·in.), as shown in Figure 8-26.
Figure 8-26 Installing the attachment plate onto the rear of the RRU
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Step 5 Install the RRU onto the main bracket, as shown in Figure 8-27.
Figure 8-27 Installing the RRU onto the main bracket
Step 6 Use an inner hexagon screwdriver to tighten the captive screw into the holes on the top of the
attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and
main bracket are firmly secured, as shown in Figure 8-28.
Figure 8-28 Securing the captive screw into the connection hole
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----End
8.4 Installing the RRU on Angle Steel
This section describes the procedure and precautions for installing the RRU on angle steel. An
RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle
steel allows only one RRU to be installed in standard or reverse mode.
Prerequisites
Before you install an RRU on angle steel secured on a tower, the RRU and its mounting
brackets are hoisted onto the tower. For details, see 7.1 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 8-29 shows the top view of the RRU installed on angle steel.
Figure 8-29 Top view of the RRU
(1) Angle steel
Procedure
Step 1 Determine a position for installing the mounting brackets.
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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.
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If the RRU must be installed on angle steel secured on the ground, see Figure 8-30 to
determine a position.
Figure 8-30 Distance between the mounting brackets and the ground
NOTE
As shown in the figure above, it is recommended that the mounting kits be installed at a position
1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient,
only the 3.5 Installation Clearance Requirements of an RRU needs to be provided.
Step 2 Install the RRU mounting brackets, as shown in Figure 8-31.
Figure 8-31 Installing the RRU mounting brackets
NOTE
Verify that the arrows on the mounting brackets are pointing up.
1.
Adjust the position of the nut and remove one end of the square-neck bolt from the slot
on the auxiliary bracket.
2.
Slide the mounting brackets onto the angle steel horizontally and insert the square-neck
bolt into the slot.
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Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so
that the mounting brackets are secured onto the angle steel, as shown in Figure 8-32.
NOTICE
Tighten the nuts on the two square-neck 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 8-32 Securing the RRU mounting brackets
Step 4 Use an inner hexagon screwdriver to remove the attachment plate from one side of the RRU,
reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws to
5 N·m (44.25 lbf·in.), as shown in Figure 8-33.
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Figure 8-33 Installing the attachment plate onto the rear of the RRU
Step 5 Install the RRU onto the main bracket, as shown in Figure 8-34.
Figure 8-34 Installing the RRU onto the main bracket
Step 6 Use an inner hexagon screwdriver to tighten the captive screw into the holes on the top of the
attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and
main bracket are firmly secured, as shown in Figure 8-35.
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Figure 8-35 Securing the captive screw into the connection hole
----End
8.5 Installing the RRU on a Wall
This section describes the procedure and precautions for installing the RRU on a wall.
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
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 anchor bolts must be tightened to 30 N·m (265.52 lbf·in.) so that the bolts
stay secured without damaging the wall.
Procedure
Step 1 Disassemble the RRU mounting brackets, as shown in Figure 8-36.
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Figure 8-36 Disassembling the mounting brackets
(1) Main bracket
(2) Square-neck bolt
(3) Pole installation bracket
(4) Auxiliary bracket
(5) Flat washer
(6) Spring washer
(7) Nut
(8) Plastic cap
1.
Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws
on the pole installation bracket, and remove the main bracket from the pole installation
bracket.
2.
Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove
the plastic cap, nuts, spring washers, flat washers, square-neck bolts, and pole
installation bracket from the auxiliary bracket.
Step 2 Place the pole installation bracket against the installation position, use a level to verify that
the pole installation bracket is placed horizontally, and then mark anchor points with a marker,
as shown in Figure 8-37.
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Figure 8-37 Marking anchor points
(1) Level
(2) Pole installation bracket
(3) RRU
NOTE
As shown in the figure above, it is recommended that the pole installation bracket be installed at a
position 1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient,
only the 3.5 Installation Clearance Requirements of an RRU needs to be provided.
Step 3 Drill holes at the anchor points, and then insert expansion anchor bolt assemblies, as shown in
Figure 8-38.
Figure 8-38 Drilling a hole and inserting expansion anchor bolt assemblies
(1) M10x80 bolt
1.
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(2) Nut
(3) Spring washer
(4) Flat washer
(5) Expansion tube
Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points
with the depth ranging from 55 mm (2.17 in.) to 60 mm (2.36 in.), use a vacuum cleaner
to clear the dust out from inside and around the holes, and measure the distances between
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holes. If any of the hole is beyond the acceptable range, mark a new anchor point and
drill a new hole.
NOTICE
Take proper safety measures to protect your eyes and respiratory tract against the dust
before drilling holes.
2.
Tighten the expansion anchor bolts slightly and place one vertically into each hole.
3.
Use a rubber mallet to pound the expansion anchor bolt until it goes all the way into the
hole.
4.
Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer,
and flat washer in sequence.
NOTICE
After dismantling an expansion anchor bolt, ensure that the top of the expansion tube is
on the same level as the wall. Otherwise, the device cannot be installed on the wall
evenly and securely.
Step 4 Install the pole installation bracket on the expansion anchor bolts, place the flat washers,
spring washers, and nuts through the expansion anchor bolts in sequence, and then use a 16
mm (0.63 in.) torque socket to tighten the nuts to 30 N·m (265.52 lbf·in.), as shown in Figure
8-39.
Figure 8-39 Installing the pole installation bracket on the expansion anchor bolts
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NOTICE
Verify that the arrows on the pole installation bracket are pointing up.
Step 5 Install the main bracket onto the pole installation bracket, and use an inner hexagon
screwdriver to tighten four M6x16 inner hexagon screws to 5 N·m (44.25 lbf·in.) so that the
main bracket and pole installation bracket are firmly secured, as shown in Figure 8-40.
Figure 8-40 Installing the main bracket
(1) Main bracket
(2) Pole installation bracket
Step 6 Use an inner hexagon screwdriver to remove the attachment plate from one side of the RRU,
reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws to
5 N·m (44.25 lbf·in.), as shown in Figure 8-41.
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Figure 8-41 Installing the attachment plate onto the rear of the RRU
Step 7 Install the RRU onto the main bracket, as shown in Figure 8-42.
Figure 8-42 Installing the RRU onto the main bracket
Step 8 Use an inner hexagon screwdriver to tighten the captive screw into the holes on the top of the
attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and
main bracket are firmly secured, as shown in Figure 8-43.
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Figure 8-43 Securing the captive screw into the connection hole
----End
8.6 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 the 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.
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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
height-unrestricted scenarios.
When installing the pole installation 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 Disassemble the RRU mounting brackets, as shown in Figure 8-44.
Figure 8-44 Disassembling the mounting brackets
(1) Main bracket
(2) Square-neck bolt
(3) Pole installation bracket
(4) Auxiliary bracket
(5) Flat washer
(6) Spring washer
(7) Nut
(8) Plastic cap
1.
Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws
on the pole installation bracket, and remove the main bracket from the pole installation
bracket.
2.
Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove
the plastic cap, nuts, spring washers, flat washers, square-neck bolts, and pole
installation bracket from the auxiliary bracket.
Step 2 Use the M10x50 bolts delivered with the IFS06 to secure the pole installation 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 pole installation bracket are pointing up.
Height-restricted scenarios
Use one finger to push and remove the rubber plugs on the beam and then install the pole
installation bracket, as shown in Figure 8-45.
Figure 8-45 Installing the pole installation bracket in height-restricted scenarios
(1) Spring washer
(2) Rubber washer
Height-unrestricted scenarios
Install the pole installation bracket, as shown in Figure 8-46.
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Figure 8-46 Installing the pole installation bracket in height-unrestricted scenarios
(1) Spring washer
(2) Rubber washer
Step 3 Attach the main bracket to the pole installation bracket, and use an inner hexagon screwdriver
to tighten four M6x16 screws to 5 N·m (44.25 lbf·in.) so that the main bracket and pole
installation bracket are firmly secured, as shown in Figure 8-47.
Figure 8-47 Installing the main bracket
(1) Main bracket
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(2) Pole installation bracket
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Step 4 Attach the RRU to the main bracket, and then use an inner hexagon screwdriver to tighten the
captive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.)
so that the attachment plate and main bracket are firmly secured, as shown in Figure 8-48.
Figure 8-48 Installing the RRU onto the main bracket
Step 5 Install the RRUs on the lower level from left to right, as shown in Figure 8-49.
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Figure 8-49 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 (10°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 8-50.
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Figure 8-50 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.
9.1 Cabling Requirements
Cables must be laid out according to the specified cabling requirements to prevent signal
interference.
9.2 Cable Connections
This section describes the cable connections for a single RRU and multiple RRUs.
9.3 Installation Process
This section describes the process of installing RRU cables.
9.4 RRU Cable List
This section describes RRU cable connections.
9.5 Installing an RRU PGND Cable
This section describes the procedure for installing an RRU PGND cable.
9.6 Installing an RRU RF Jumper
This section describes the procedure for installing an RRU RF jumper.
9.7 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.
9.8 Installing an RRU Alarm Cable
This section describes the procedure for installing an RRU alarm cable.
9.9 Opening the Cover Plate of an RRU Cabling Cavity
This section describes the procedure for opening the cover plate of an RRU cabling cavity.
9.10 Installing an RRU Power Cable
This section describes the procedure for installing an RRU power cable.
9.11 Installing a CPRI Fiber Optic Cable
This section describes the procedure for installing a CPRI fiber optic cable.
9.12 Closing the Cover Plate of an RRU Cabling Cavity
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This section describes the procedure for closing the cover plate of an RRU cabling cavity.
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9.1 Cabling Requirements
Cables must be laid out according to the specified cabling requirements to prevent signal
interference.
NOTE
If a cable listed below is not required, skip the cabling requirements of the cable.
General Cabling Requirements
Bending radius requirements
The bending radius of a 7/8'' feeder must be greater than 250 mm (9.84 in.), and the
bending radius of a 5/4'' feeder must be greater than 380 mm (14.96 in.).
The bending radius of a 1/4'' jumper must be greater than 35 mm (1.38 in.). The bending
radius of a super-flexible 1/2'' jumper must be greater than 50 mm (1.97 in.), and the
bending radius of an ordinary 1/2'' jumper must be greater than 127 mm (5 in.).
The bending radius of a power cable or PGND cable must be at least three times its
diameter.
The bending radius of a fiber optic cable is at least 20 times of its diameter, and the
bending radius of a breakout cable is at least 30 mm (1.18 in.).
The bending radius of an E1/T1 cable must be at least three times its diameter.
The bending radius of a signal cable must be at least five times its diameter.
Cable binding requirements
Cables of the same type must be bound together.
Different types of cables must be separately laid out and bound, with a minimum
distance of 30 mm (1.18 in.) from each other.
The cables must be bound tightly and neatly. The sheaths of the cables must not be
damaged.
The cable ties must face the same direction, and those at the same horizontal line must be
in a straight line.
The excess of the indoor cable ties is cut off. The excess of 5 mm (0.197 in.) of the
outdoor cable ties is reserved, and the cut surfaces are smooth without sharp edges.
After cables are installed, labels or nameplates must be attached to the cables at their
ends, curves, and interconnection positions.
Security requirements
When routing cables, avoid sharp objects, for example sharp edges on the wall. If
necessary, use tubes to protect the cables.
When routing cables, keep the cables away from heat sources and use heat insulation
materials to insulate the cables from the heat sources.
Reserve a proper distance (0.1 m or 3.937 in. is recommended) between equipment and
cables especially at the cable curves to protect the cables and equipment.
Indoor cabling requirements
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Route each cable into the room through the feeder window.
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Reserve drip loops for all cables outside the feeder window before routing them into the
room. Ensure that the radiuses of the drip loops are greater than or equal to the minimum
bending radiuses of the cables.
When routing a cable into the room, ensure that a person is assisting you in the room.
Apply waterproof treatment to the feeder window.
Outdoor Cabling Requirements
After being connected to a ground clip on power cables, a ground cable must be routed
downwards to prevent water from entering the equipment to which the power cables
connect.
Protect outdoor cables against potential damage. For example, put the cables through
tubes.
The cables to be protected include AC power cables, transmission cables, and cables laid
out underground.
When routing cables through tubes on the ground below the cabinet, put a 30 mm to 50
mm (1.18 in. to 1.97 in.) length of the tubes into the base of the cabinet but do not put
the tubes into the cabinet. Use waterproof tape or waterproof silicon gel to block both
ends of the tubes and use sheet metal tabs to secure the tubes to the cable holes in the
base.
When routing cables through tubes along a metal cable trough below the cabinet, do not
put the tubes into the base of the cabinet but cover the cable trough and connect the tubes
to the cable holes in the base.
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.
Use clips to secure cables outdoors. For the method of installing a clip, see the
installation guide delivered with the clip.
Arrange cables neatly along the routing direction and use clips to secure the cables.
Determine the positions where the clips are installed according to the actual situation.
For example, 7/8" feeders are secured with clips at an interval of 1.5 m to 2 m (4.92 ft to
6.56 ft), CPRI fiber optic cables and power cables are secured with clips at an interval of
1 m to 1.5 m (3.28 ft to 4.92 ft). Ensure that the clips are evenly spaced and in the same
direction.
When fastening cables with a clip, ensure that the cables are aligned neatly and are
routed through the holes in the clip. Do not stretch the cables too tightly.
NOTE
There are two types of clips: 3-hole clip and 6-hole clip, which are described as follows:
A 3-hole clip is shown by illustration a in the following figure. It is often used to fasten feeders.
A 6-hole clip is shown by illustration b in the following figure. It is often used to fasten power cables
and CPRI fiber optic cables.
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Figure 9-1 Exterior of the clips
(1) Cable hole for feeders
(2) Cable hole for fiber optic cables
(3) Cable hole for power cables
The following figure shows the cables secured on a cable tray.
Figure 9-2 Cables secured on a cable tray
(1) 3-hole clip
(2) 6-hole clip
The following figure shows the cables secured on a tower.
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Figure 9-3 Cables secured on a tower
(1) 3-hole clip
(2) 6-hole clip
Special Cabling Requirements
Cabling of 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 can only be laid out under well-planned instructions. The cabling activities of
fiber optic cables are allowed only when qualified personnel and communication
facilities are available.
Do not circle and twist cables.
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After routing a DC power cable onto the platform on a tower, route it along the shortest
path to the rails surrounding the platform, and route it along the inside of the rails.
After routing a DC power cable close to the equipment on a tower, use clips to secure the
power cable onto a pole or the rails surrounding the platform. Ensure that there is no
excessively long distance between the equipment and the position where the power cable
is secured.
Cabling of PGND cables
PGND cables for a base station must be connected to the same group of ground bars.
PGND cables must be buried in the ground or routed indoors.
The external conductor 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 separately. A certain distance must be
reserved between them to prevent interference from each other.
Switches or fuses 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 of E1 cables
E1 cables must not cross power cables, PGND cables, or RF cables when laid out. If
transmission cables are laid out 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 lined up straight and bound neatly with cable ties.
Sufficient slack is provided for E1 cables at turns.
E1 cables must not be pressed by the door of the cabinet when routed, as shown in the
following figure.
Figure 9-4 E1 cables routed in the cabinet
Cabling of fiber optic cables
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At least three people are required for laying out fiber optic cables. The cabling activities
of fiber optic cables are allowed only when qualified personnel and communication
facilities are available.
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The operating temperature of fiber optic cables ranges from -40ºC to +60ºC (-40ºF to
+140ºF). If the actual temperature is beyond this range, take protective measures or
select another route.
Do not circle and twist cables.
Do not bind a fiber optic cable at the position where it bends.
Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the fiber optic
cables away from sharp objects.
When fiber optic cables are routed, the excess of the fiber optic 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 9-5 Binding fiber optic cables
When coiling fiber optic cables, apply even strength. Do not bend the fiber optic cables
with force.
Unused optical connectors must be covered with dustproof caps.
The fiber optic cables must not be pressed by the door of the cabinet when routed, as
shown in the following figures.
Figure 9-6 CPRI fiber optic cables routed in the cabinet (1)
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Figure 9-7 CPRI fiber optic cables routed in the cabinet (2)
Figure 9-8 FE/GE fiber optic cables routed in the cabinet
After routing a fiber optic cable onto the platform on a tower, route it along the shortest
path to the rails surrounding the platform, and route it along the inside of the rails.
After routing a fiber optic cable close to the equipment on a tower, use clips to secure the
fiber optic cable onto a pole or the rails surrounding the platform. Ensure that there is no
excessively long distance between the equipment and the position where the cable is
secured.
Coil the excess of the fiber optic cables near the equipment on the tower before securing
the cables on the tower.
9.2 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.
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Figure 9-9 shows the cable connections for a single RRU.
Figure 9-9 Cable connections for a single RRU
(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 9-10 shows the cable connections for multiple RRUs.
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Figure 9-10 Cable connections for multiple RRUs
(1) PGND cable
(2) RRU RF jumper
(3) RRU power cable
(4) CPRI fiber optic cable
9.3 Installation Process
This section describes the process of installing RRU cables.
Figure 9-11 shows the process of installing RRU cables.
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Figure 9-11 Process of installing RRU cables
9.4 RRU Cable List
This section describes RRU cable connections.
Table 9-1 lists RRU cables.
Table 9-1 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
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Cable
One End
The Other End
Connector
Installation
Position
Connector
Installation
Position
RRU Alarm
Cable
DB15
waterproof male
connector
EXT_ALM
port on the
RRU
Cord end
terminal
External alarm
device
CPRI Fiber
Optic Cable
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
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
RRU AISG
Extension
Cable
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
9.5 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.
DANGER
Install RRU PGND cables by strictly following the following operations. Otherwise, damage
to the RRU or personal injury may occur.
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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 9-12.
Figure 9-12 Installing an RRU PGND cable
NOTE
Crimp OT terminals in correct positions, as shown in Figure 9-13.
Figure 9-13 Correct position of an OT terminal
Step 3 Label the installed cables according to the instructions in Attaching a Cable-Tying Label.
----End
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9.6 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 9-14.
Figure 9-14 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 9-15.
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Figure 9-15 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 9-16.
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NOTICE
Do not remove dustproof caps from vacant antenna connectors.
Figure 9-16 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 9.1 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
9.7 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.
a.
Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the
RET port and remove the dustproof cap.
b.
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 9-17.
Figure 9-17 Installing an RRU AISG multi-wire cable
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c.
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.).
d.
Connect the other end of the cable to the standard AISG male connector on the
RCU.
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e.
Route the cables according to the instructions in 9.1 Cabling Requirements, and
then use cable ties to bind the cables.
f.
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.
a.
Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the
RET port and remove the dustproof cap.
b.
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 9-18.
Figure 9-18 Installing an RRU AISG multi-wire cable
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c.
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.).
d.
Connect the other end of the AISG extension cable to the standard AISG male
connector on the RCU, as shown in Figure 9-19.
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Figure 9-19 Installing an RRU AISG extension cable
e.
Route the cables according to the instructions in 9.1 Cabling Requirements, and
then use cable ties to bind the cables.
f.
Label the installed cables according to the instructions in Attaching an L-Shaped
Label.
----End
9.8 Installing an RRU Alarm Cable
This section describes the procedure for installing an RRU alarm cable.
Procedure
Step 1 Use an M3 Phillips screwdriver to loosen the screws on the dustproof cap on the EXT_ALM
port and remove the dustproof cap.
Step 2 Connect the waterproof DB15 connector at one end of the RRU alarm cable to the
EXT_ALM port on the RRU, as shown in Figure 9-20.
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Figure 9-20 Installing an RRU alarm cable
NOTE
Install the waterproof DB15 male connector on the RRU alarm cable with caution, preventing the pin
assignment from being damaged.
Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB15
male connector to 0.4 N·m (3.54 lbf·in.).
Step 4 Connect the eight cord end terminals at the other end to external alarm devices.
NOTE
l Remove insulated protective tubes from the cord end terminals before connecting the cord end terminals
to devices, as shown in Figure 9-21.
l Use insulating adhesive tapes to wrap cord end terminals that are not in use and fix them at a proper
position based on the onsite situations. This prevents false alarm reporting and equipment damage due to
contact of exposed cables. Figure 9-22 shows the method for handling cord end terminals not in use.
Figure 9-21 Removing insulated protective tubes from the cord end terminals
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Figure 9-22 Method for handling cord end terminals that are not in use
Step 5 Route the cables according to the instructions in 9.1 Cabling Requirements, and then use
cable ties to bind the cables.
Step 6 Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
9.9 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 Use an M5 Phillips screwdriver to loosen the three screws on the cover plate of the RRU
cabling cavity, and open the cover plate, as shown in Figure 9-23.
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Figure 9-23 Opening the cover plate of the RRU cabling cavity
(1) Cover plate
(2) Cabling cavity
(3) Clip
(4) Cable trough for the power cable
(5) Waterproof block
(6) Cable trough for the fiber optic cable
Step 3 Loosen the screws on the clip using an M4 Phillips screwdriver, and open the clip, as shown
Figure 9-24.
NOTE
Open the clip only for the associated cable.
Figure 9-24 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
9.10 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 12.1 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.
Table 9-2 describes the RRU power cable.
Table 9-2 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
EPC5
connector
DCD
U-12
A cable with a black jacket and
two wires inside
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.
DCD
U-11
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CAUTION
Before installing the RRU power cable, ensure that the upper-level circuit breaker is
switched off and the power cable has no voltage.
A drip loop is required for the position between the RRU port and the cable, preventing
rain from damaging the RRU.
When installing the RRU power cable, connect the power cable to the RRU connector
first and then to the power equipment connector. Incorrect connection sequence or
reverse connection of positive and negative poles may damage the RRU or cause
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 9-25.
Figure 9-25 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.
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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.
Step 3 Route the cable according to the instructions in 9.1 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
9.11 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.
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 9-26.
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Figure 9-26 Installing an optical module
NOTICE
l The performance of an optical module may deteriorate if it is exposed to the air for more
than 20 minutes. Therefore, insert a fiber optic cable into an unpacked optical module
within 20 minutes.
l The CPRI optical cables must be correctly connected in one time during the installation.
Otherwise, the RRU may become faulty, causing cells to fail to provide services.
Step 2 Install CPRI optical cables.
NOTICE
l Ensuring that CPRI optical cables are correctly connected before the RRU is powered on.
Otherwise, the RRU may become faulty, causing cells to fail to provide services.
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
9.3 Installation Process.
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When installing CPRI optical cables for dual-fiber bidirectional optical modules, remove
the dustproof cap from the optical cable, and connect the end labeled 1A and 1B on the
optical cable to the optical module on the RRU side, as shown in Figure 9-27. Connect
the DLC end labeled 2A and 2B to the CPRI port on the main control board (such as the
GTMU) or baseband processing board (such as the WBBP) in the BBU.
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Figure 9-27 Installing CPRI optical cables for dual-fiber bidirectional optical modules
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When installing CPRI optical cables for single-fiber bidirectional optical modules,
remove the dustproof cap from the LC end labeled 1A on the optical cable, divide the
DLC end into two LC ends, and connect the end labeled 1A to the optical module on the
RRU side, as shown in Figure 9-28. Connect the other LC end labeled 2A to the CPRI
port on the main control board (such as the GTMU) or baseband processing board (such
as the WBBP) in the BBU.
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Figure 9-28 Installing CPRI optical cables for single-fiber bidirectional optical modules
Step 3 Route the cables according to the instructions in 9.1 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
9.12 Closing the Cover Plate of an RRU Cabling Cavity
This section describes the procedure for closing the cover plate of an RRU cabling cavity.
Procedure
Step 1 Close 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 9-29.
NOTICE
Ensure that the exposed shield layer of the power cable is properly tightened using the clip.
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Figure 9-29 Closing clips
Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure
9-30.
NOTICE
Ensure that cables and waterproof blocks are properly inserted into troughs.
Figure 9-30 Correct placement of waterproof blocks
Step 3 Close the cover plate of the RRU cabling cavity. Use an M5 torque screwdriver to partially
tighten the screws on the cover plate in the sequence shown in Figure 9-31. Then tighten the
screws to 2 N·m (17.7 lbf·in.) in the same sequence.
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NOTICE
The RRU cabling cavity must be securely tightened to prevent water.
Figure 9-31 Closing the cover plate of an RRU cabling cavity
Step 4 Take off the ESD gloves, and pack up all the tools.
----End
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10 Checking the RRU Hardware Installation
10
Checking the RRU Hardware
Installation
After an RRU is installed, check the hardware installation.
Table 10-1 provides the checklist for the RRU hardware installation.
Table 10-1 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 Checking the RRU Hardware Installation
SN
Item
12
All ground cables are properly grounded.
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11
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 11-1 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 11-1 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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12 Appendix
12
Appendix
About This Chapter
This section describes the procedure for adding an easy power receptacle (pressfit type)
connector.
12.1 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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12 Appendix
12.1 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 12-1 shows the cable diagram on labels.
Figure 12-1 Cable diagram on labels
(1) Cable diagram on labels
NOTICE
Prepare a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU
Side by strictly following the following operations. Otherwise, damage to the RRU or
personal injury may occur.
Procedure
Step 1 Determine the length of the power cable for different operations based on the labels, as shown
in Figure 12-2.
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Figure 12-2 Determining the length of the power cable
Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 12-3.
Figure 12-3 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 12-4.
Figure 12-4 Stripping the sheath off each core wire
Figure 12-5 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 12-6.
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12 Appendix
Figure 12-6 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, and then use a torque screwdriver to
tighten the M4 screws to 1.4 N·m (12.39 lbf·in.), as shown in Figure 12-7.
DANGER
Do not reversely connect the positive and negative poles. Reverse connection of positive
and negative poles may result in equipment malfunctions or personal injury. Therefore,
check the power cable connection before powering on the RRU.
Figure 12-7 Adding a tool-less female connector (pressfit type) to two core wires
3.
After the core wires are installed, ensure that each core wire is securely installed after
being dragged with a torque of 30 N•m and all copper wires are inserted in the connector
terminal socket.
Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as
shown in Figure 12-8.
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12 Appendix
Figure 12-8 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 12-9.
Figure 12-9 Inserting core wires into the tool-less female connector (pressfit type)
----End
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