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consent of Huawei Technologies Co., Ltd.
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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
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
This document describes procedures for installing an active antenna unit 3940 (AAU3940, which
is shortened to AAU in this document) and its cables. It also provides the checklists for hardware
installation.
Product Version
The following table lists the product versions related to this document.
Product NameSolution VersionProduct Version
DBS3900
Intended Audience
lSystem engineers
lInstallation personnel
lMaintenance engineers
Organization
l SRAN9.0 and later
l RAN16.0 and later
l eRAN7.0 and later
V100R009C00 and later
1 Changes in AAU3940 Installation Guide
This section describes changes in AAU3940 Installation Guide.
2 Overview
Before installing an AAU, you must be familiar with its installation options and installation
clearance requirements.
3 Installation Preparations
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
This chapter lists the tools and instruments that must be obtained before the installation. It also
specifies the skills that the onsite personnel must have.
4 Unpacking Check
Unpack and check the delivered equipment to ensure that all materials are included and intact.
5 Installation Process
This chapter describes the process of installing an AAU.
6 (Optional) Installing an ODM
This section describes the procedure and precautions for installing an ODM.
7 Preprocessing the AAU Maintenance Cavity
Before installing an AAU, take power terminals out of its maintenance cavity and install optical
modules.
8 Lifting an AAU
Before installing an AAU on a pole, you need to lift the AAU to the installation position on the
pole.
9 Installing an AAU
This chapter describes the procedures for installing an AAU in different scenarios.
10 Installing AAU Cables
This section describes the procedure and precautions for installing AAU cables.
11 Closing a Maintenance Cavity
After all installation procedures are complete, you need to close the AAU maintenance cavity.
12 (Optional) Installing a Cord Cover for an ODM
This section describes a procedure for installing a cord cover for an ODM after all cables are
installed.
13 Adjusting the Horizontal Azimuth of an Antenna
This section describes the procedure for adjusting the horizontal azimuth of an antenna based
on coverage requirements after all cables are installed.
14 Installation Checklist
This section describes the checklist for AAU hardware installation.
15 Powering on an AAU
This section describes the procedure and precautions for powering on an AAU.
16 Appendix
This chapter describes auxiliary operations during an AAU installation process.
Conventions
Symbol Conventions
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The symbols that may be found in this document are defined as follows.
SymbolDescription
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
General Conventions
The general conventions that may be found in this document are defined as follows.
ConventionDescription
Times New RomanNormal paragraphs are in Times New Roman.
BoldfaceNames of files, directories, folders, and users are in
boldface. For example, log in as user root.
ItalicBook 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.
ConventionDescription
BoldfaceThe keywords of a command line are in boldface.
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3.2 Tools and Instruments..................................................................................................................................................18
3.3 Requirements for Onsite Personnel..............................................................................................................................19
6 (Optional) Installing an ODM..................................................................................................25
7 Preprocessing the AAU Maintenance Cavity.........................................................................30
8 Lifting an AAU.............................................................................................................................34
9 Installing an AAU........................................................................................................................37
9.1 Installing an AAU on a Pole.........................................................................................................................................38
9.2 Installing an AAU on the Top of a Pole.......................................................................................................................44
9.3 Installing an AAU on a Wall........................................................................................................................................48
10.2 Installing an AAU PGND Cable................................................................................................................................62
10.3 Installing an AAU Power Cable.................................................................................................................................67
10.4 Installing an ODM Power Cable................................................................................................................................72
10.5 Installing a Trunk CPRI Fiber Optic Cable Between an ODM and a BBU...............................................................73
10.6 Installing a CPRI Fiber Optic Cable Between an AAU and a BBU or Between an AAU and an ODM...................80
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16.1 Assembling the OT Terminal and the Power Cable...................................................................................................98
16.2 Adding a Tool-Less Female Connector (Pressfit Type) to an AAU Power Cable on the AAU Side......................102
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Before installing an AAU, you must be familiar with its installation options and installation
clearance requirements.
2.1 Installation Scenario
An AAU can be installed independently or can be installed together with an ODM04A (ODM
for short) on a pole, a wall, or the top of a pole.
2.2 Installation Clearance Requirements
This section describes installation clearance requirements in different scenarios.
2.3 AAU Mounting Kits
This section describes mounting kits for installing AAUs on a pole, a wall, and the top of a pole.
2.4 ODM Description
This section describes functions and specifications of an ODM.
2.5 Surge Protection Requirements
When an AAU is installed on a pole or the top of a pole, the AAU must meet the surge protection
requirements. Otherwise, surge protection measures must be taken.
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An AAU can be installed independently or can be installed together with an ODM04A (ODM
for short) on a pole, a wall, or the top of a pole.
Installation Scenario Description
NOTE
An AAU has been camouflaged and the second camouflaging is not allowed in principle. If the second
camouflaging must be performed, you need to contact Huawei technical engineers for assessment.
The following figure shows scenarios in which AAUs are installed independently.
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c: Scenario in which an AAU is
installed together with an ODM on a
pole
6
AAU3940
Installation Guide2 Overview
d: Scenario in which an AAU is
installed together with an ODM on a
wall
e: Scenario in which an AAU is
installed on the top of a pole and an
ODM is installed on a wall
-
NOTICE
In all scenarios, AAUs are installed together with their bottoms facing downwards. The vertical
deviation angle of a support must be less than or equal to 5 degrees, as shown in the following
figure.
Figure 2-3 Vertical deviation angle of an AAU
(1) AAU
(2) Support (pole, top of a pole, or wall)
Requirements of Installation Scenarios
The following table describes the requirements for poles, walls, and tops of poles in the preceding
installation scenarios.
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l The part of a pole for installing an AAU should have a diameter
of 60 mm to 300 mm (2.36 in. to 11.81 in.) and the recommended
wall thickness of a pole is greater than or equal to 4 mm (0.16 in.).
l If the part of a pole for installing an AAU has a diameter greater
than 300 mm (11.81 in.), an auxiliary pole is required for installing
the AAU.
l Two AAUs are installed back to back in most cases.
l The recommended wall thickness of a pole is greater than or equal
to 4 mm (0.16 in.).
l When AAUs are installed on the same level, the part of a pole for
installing the AAUs should have a diameter of 80 mm to 230 mm
(3.15 in. to 9.06 in.). When AAUs are installed on different levels,
the parts of a pole for installing the AAUs should have a diameter
of 60 mm to 230 mm (2.36 in. to 9.06 in.).
l If the part of a pole for installing AAUs has a diameter greater than
230 mm (9.06 in.), an auxiliary pole is required for installing the
AAUs.
Three AAUs are
installed on a pole.
AAUs are installed
on a wall.
An AAU is installed
on the top of a pole.
l The recommended wall thickness of a pole is greater than or equal
to 4 mm (0.16 in.).
l When AAUs are installed on the same level, the part of a pole for
installing the AAUs should have a diameter of 80 mm to 230 mm
(3.15 in. to 9.06 in.). When AAUs are installed on different levels,
the parts of a pole for installing the AAUs should have a diameter
of 60 mm to 230 mm (2.36 in. to 9.06 in.).
l If the part of a pole for installing AAUs has a diameter greater than
230 mm (9.06 in.), an auxiliary pole is required for installing the
AAUs.
A wall should have a load-bearing capacity of 80 kg (176.37 lb).
l The recommended wall thickness of a pole is greater than or equal
to 4 mm (0.16 in.).
l A flange plate must be installed on the top of a pole for attaching
an AAU to the pole.
l The recommended thickness of a flange plate is greater than or
equal to 6 mm (0.24 in.).
l To achieve neat installation, it is recommended that the diameter
of a pole be the same as that of a flange plate.
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The method of connecting a flange plate to the top of a pole is determined by customers. The
following figure shows the design specifications of ports on a flange plate for connecting an
AAU.
Figure 2-4 Design specifications of ports on a flange plate
(1) Flange plate(2) Screw hole(3) Nut
2.2 Installation Clearance Requirements
This section describes installation clearance requirements in different scenarios.
The following figure shows the clearance requirements for installing an AAU.
NOTE
The following figure shows the clearance requirements for independently installing an AAU. When an AAU is
installed together with an ODM, the clearance requirements are different.
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This section describes mounting kits for installing AAUs on a pole, a wall, and the top of a pole.
Mounting Kits for an AAU Installed on a Pole or Wall
The same mounting kits are used for installing an AAU on a pole and installing an AAU on a
wall. However, the procedure for installing an AAU on a pole is different from that for installing
an AAU on a wall. The following figure shows the mounting kits for an AAU.
NOTE
When an AAU is installed on a pole or wall, the main bracket and attachment plate are required.
lWhen an AAU is installed on a pole, M8x80 expansion anchor bolts are not required.
lWhen an AAU is installed on a wall, steel belts are not required. Therefore, you need to remove the steel
belts from mounting kits.
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The ODM is an auxiliary low-power AC device for providing power distribution and fiber
distribution. The ODM cover provides fiber distribution and the ODM provides power
distribution. The following figure shows the structure of an ODM.
Figure 2-9 ODM structure
(1) Splicing tray(2) Fiber holder(3) Clip(4) Holes for output fiber
(5) Hole for the input fiber
optic cable
(9) Screwdriver(10) Terminal block for
(6) Hanger for the trunk
fiber optic cable
input power cables
(7) Cable holes for the
output power cables
(11) Terminal block for
output power cables
Specification
The following table describes the specifications of an ODM.
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When an AAU is installed on a pole or the top of a pole, the AAU must meet the surge protection
requirements. Otherwise, surge protection measures must be taken.
A direct lightning strike protection measure must be taken (that is, a lightning rod is installed)
if AAU installation meets the following conditions:
lWhen the AAU is installed on a pole or the top of a pole, the distance between the top of
the pole and the top of the AAU is less than 30 cm (0.98 ft).
lThe AAU is not installed within the protection range of the lightning rod.
When a lightning rod is installed near the AAU installation position, the following conditions
must be met:
lThe distance between the lightning rod and the top of the AAU must be greater than 30 cm
(0.98 ft).
lThe lightning rod must be properly connected to the onsite ground grid.
lThe AAU PGND cable must be routed along the inner side of the pole and is connected to
the ground bar of the onsite ground grid.
lIn addition to the above conditions, the lightning rod installation must meet other building
surge protection requirements.
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This chapter lists the tools and instruments that must be obtained before the installation. It also
specifies the skills that the onsite personnel must have.
3.1 Documents
This section lists the documents that must be obtained before the installation.
3.2 Tools and Instruments
You must prepare the following tools and instruments before the installation.
3.3 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.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
The customer must pay attention to the following points before the installation:
lThe customer's technical engineers must be trained by Huawei and be familiar with the
installation and operation methods.
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Find out the cause and report any missing
articles to the local Huawei office.
21
AAU3940
Installation Guide4 Unpacking Check
If...Then...
The outer packing is severely damaged or
soaked
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 articles tally with
those on the packing list
There are any goods missing, incorrectly
delivered, or damaged
Find out the cause and report the situation to
the local Huawei office.
Sign the Packing List with the customer.
Report the situation to the local Huawei office.
CAUTION
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.
Step 4 Take the recording form out of the carton containing antennas and fill in the form according to
the actual situation.
NOTICE
Ensure that the RET SN on the antenna's name plate is consistent with that in the recording form.
----End
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This section describes the procedure and precautions for installing an ODM.
Procedure
The part of a pole for installing the mounting bracket of an ODM should have a diameter of 114
mm to 380 mm (4.489 in. to 14.96 in.).
lInstalling an ODM on a wall
1.Determine a position for installing an ODM on a wall, use a level to adjust the position
to ensure that the mounting bracket will be placed horizontally, and use a marker to
mark anchor points, as shown in the following figure.
Figure 6-1 Determining a position for installing an ODM
(1) Level
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2.Drill holes at the anchor points and install expansion bolts in the holes, as shown in
the following figure.
a.Use a hammer drill with a Φ8 bit to drill holes vertically at the marked anchor
points. Ensure that the depth of each hole ranges from 50 mm to 60 mm (1.97 in.
to 2.36 in.).
b.Use a vacuum cleaner to clear the dust inside and around the holes, and measure
the distances between holes. If any of the holes is beyond the acceptable range,
mark a new anchor point and drill a new hole.
c.Tighten an expansion bolt slightly and place it vertically into each hole.
d.Use a rubber mallet to pound the expansion bolt until it goes into the hole
completely. Ensure that a 20 mm (0.79 in.) part of the expansion bolt is left
outside the wall.
e.Remove the M6x60 bolt, nut, spring washer, and flat washer in sequence.
CAUTION
Take proper safety measures to protect your eyes and respiratory tract against the dust
before drilling holes.
Figure 6-2 Drilling a hole and inserting an expansion bolt assembly
(1) M6x60 bolt
(2) Nut(3) Spring washer (4) Flat washer(5) Expansion tube
3.Place the mounting bracket against the installation position on the wall, and use four
M6x60 bolts to tighten the mounting bracket to 5 N·m (44.25 lbf·in.), as shown in the
following figure.
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AAU3940
Installation Guide6 (Optional) Installing an ODM
Figure 6-3 Tightening a mounting bracket to the installation position on a wall
(1) Nut(2) Spring washer(3) Flat washer
4.Fit the two dowels on the top of the ODM backplane into the mounting bracket, and
push the ODM case until it is attached onto the mounting bracket, as shown by
illustrations a and b in the following figure.
5.Use a double-headed inner hexagon tool to tighten the screw on the top of the
attachment plate clockwise to 7 N·m (61.95 lbf·in.), as shown by illustration c in the
following figure.
Figure 6-4 Installing an ODM to a mounting bracket
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AAU3940
Installation Guide6 (Optional) Installing an ODM
lInstalling an ODM on a pole
1.Determine a position for installing an ODM on a pole, attach a mounting bracket to
the installation position on the pole, put the steel belts through the mounting bracket,
and wind the steel belts round the pole for one circle, as shown by illustrations a, b,
and c in the following figure.
2.Use an M6 inner hexagon wrench to tighten the bolts on the two steel belts alternately
to secure the mounting bracket to 5 N·m (44.25 lbf·in.), as shown by illustration d in
the following figure.
Figure 6-5 Securing a mounting bracket to a pole
3.Fit the two dowels on the top of the ODM backplane into the mounting bracket, and
push the ODM case until it is attached onto the mounting bracket, as shown by
illustrations a and b in the following figure.
4.Use a double-headed inner hexagon tool to tighten the screw on the top of the
attachment plate clockwise to 7 N·m (61.95 lbf·in.), as shown by illustration c in the
following figure.
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AAU3940
Installation Guide7 Preprocessing the AAU Maintenance Cavity
Figure 7-2 Installing the optical module
NOTICE
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.
Step 4 Use an M6 inner hexagon torque screwdriver to tighten the screw on the maintenance cavity to
7 N·m (61.95 lbf·in.), as shown in the following figure.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
Before installing an AAU on a pole, you need to lift the AAU to the installation position on the
pole.
Context
Procedure
You have preprocessed the AAU maintenance cavity. For detailed operations, see 7
Preprocessing the AAU Maintenance Cavity.
It is recommended that a tail-lift truck be used to lift installation personnel and equipment to the
installation position. If there is no tail-lift truck, a reliable and safe scaffold can be used.
NOTICE
Do not work at heights when you meet any of the following situations:
lThunder, lightning, rain, or wind greater than force 6 occurs.
lWater remains on the surface of the steel tube.
lThere may be other danger.
After the above situations are eliminated, the Huawei security director and related technical
personnel must check all devices to be used before work start.
Step 1 Installation person A lifts and places the bound mounting kits to the scaffold platform, as shown
in the following figure.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
Step 2 Use the lifting sling to bind the handle on the top of the AAU and use the traction sling to bind
the lower part of the AAU, as shown in the following figure.
Figure 8-2 Binding an AAU
(1) Handle on the top
(2) Lifting sling(3) Traction sling
Step 3 Installation person A climbs up onto the scaffold and then lifts and places the AAU on the
scaffold platform, and installation person B pulls the traction sling outwards to prevent the AAU
from colliding with the scaffold, as shown in the following figure.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
This section describes the procedure and precautions for installing an AAU on a pole.
Prerequisites
lYou have preprocessed the AAU maintenance cavity. For detailed operations, see 7
Preprocessing the AAU Maintenance Cavity.
lYou have lifted the AAU and mounting kits to the installation position on the pole. For
detailed operations, see 8 Lifting an AAU.
Context
NOTICE
Procedure
Step 1 Determine a position for installing the mounting kits on a pole.
Step 2 Attach the mounting kits to the installation position on the pole, wind each steel belt round the
Do not work at heights when you meet any of the following situations:
lThunder, lightning, rain, or wind greater than force 6 occurs.
lWater remains on the surface of the steel tube.
lThere may be other danger.
After the above situations are eliminated, the Huawei security director and related technical
personnel must check all devices to be used before work start.
pole for one circle, and put the steel belt through the sliding block of the mounting kits, as shown
in the following figure.
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Figure 9-1 Putting the steel belt through the sliding block
Step 3 Pull the steel belts to align the holes on the steel belts with those on the sliding blocks, as shown
in the following figure.
NOTE
If the pin on a sliding block is located between two holes on a steel belt after the belt is securely attached
to the pole, slightly loosen the steel belt so that the pin goes through a hole on the steel belt.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
Step 6 Attach the AAU to the main mounting bracket, and use an M6 inner hexagon screwdriver to
9 Installing an AAU
tighten the screw on the main mounting bracket to 7 N·m (61.95 lbf·in.), as shown in the following
figure.
Figure 9-5 Installing an AAU on a main mounting bracket
Step 7 Optional: Install the second AAU.
NOTICE
Before installing the second AAU, ensure that the mounting kits for the first AAU have been
securely installed.
1.Put the steel belts of the mounting kits for the second AAU through the evading holes of
the mounting kits for the first AAU, as shown in the following figure.
2.Install the mounting kits for the AAU according to steps Step 3 to Step 5.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
3.Install the AAU to the mounting kits according to Step 6.
NOTICE
Before installing the third AAU, ensure that the mounting kits for the first and second AAUs
have been securely installed.
1.Put the steel belts of the mounting kits for the third AAU through the evading holes of the
mounting kits for the first and second AAUs, as shown in the following figure.
2.Install the mounting kits for the AAU according to steps Step 3 to Step 5.
3.Install the AAU to the mounting kits according to Step 6.
NOTE
In the above figure, holes in dashed red circles are evading holes.
Figure 9-6 Putting the steel belts through the evading holes
NOTE
The following figure shows three AAUs installed on a pole.
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Do not work at heights when you meet any of the following situations:
lThunder, lightning, rain, or wind greater than force 6 occurs.
lWater remains on the surface of the steel tube.
lThere may be other danger.
After the above situations are eliminated, the Huawei security director and related technical
personnel must check all devices to be used before work start.
Procedure
Step 1 Lift the landscaping cover and remove it. Keep the landscaping cover for later installation.
Step 2 Use a torque wrench to tighten three M10 screws to 28 N·m (247.8 lbf·in.) so that the mounting
bracket is secured to the top of a pole, as shown in the following figure.
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It is recommended that the landscaping cover be installed after cables are connected.
1.Put the landscaping cover on the AAU, and press the elastomer on the mounting bracket
when the landscaping cover reaches the top of the mounting bracket so that it can slide
down.
2.Ensure that the three support braces of the landscaping cover slide into the troughs on the
bottom of the mounting bracket.
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Step 3 Drill holes at the anchor points, and then insert expansion anchor bolts, as shown in the following
figure.
1.Use a hammer drill with a Φ10 bit to drill holes vertically at the marked anchor points.
Ensure that the depth of each hole ranges from 55 mm to 60 mm (2.17 in. to 2.36 in.).
2.Use a vacuum cleaner to clear the dust inside and around the holes, and measure the
distances between holes. If any of the holes is beyond the acceptable range, mark a new
anchor point and drill a new hole.
3.Tighten the expansion anchor bolts slightly and place one vertically into each hole.
4.Use a rubber mallet to hit the expansion bolt until the expansion tube completely enters the
hole.
5.Remove the nut, spring washer, and flat washer in sequence.
CAUTION
Take proper safety measures to protect your eyes and respiratory tract against the dust
before drilling holes.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
Figure 9-13 Drilling a hole and inserting expansion anchor bolts
(1) M8x80 bolt(2) Nut(3) Spring washer(4) Flat washer(5) Expansion tube
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 main mounting bracket cannot be installed on
the wall evenly and securely.
Step 4 Place the main mounting bracket against the wall, use a torque wrench to tighten four M8 bolts
to 13 N·m (115.06 lbf·in.) and so that the main mounting bracket is securely installed on the
wall, as shown in the following figure.
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This section describes the procedure and precautions for installing AAU cables.
10.1 Cabling Requirements
Cables must be laid out according to the specified cabling requirements to prevent signal
interference.
10.2 Installing an AAU PGND Cable
This section describes the procedure and precautions for installing an AAU PGND cable.
10.3 Installing an AAU Power Cable
This section describes the process and precautions for installing an AAU power cable.
10.4 Installing an ODM Power Cable
This section describes the process and precautions for installing an ODM power cable when an
ODM is configured.
10.5 Installing a Trunk CPRI Fiber Optic Cable Between an ODM and a BBU
This section describes the procedure for installing a trunk CPRI fiber optic cable between an
ODM and a BBU when an ODM is configured.
10.6 Installing a CPRI Fiber Optic Cable Between an AAU and a BBU or Between an AAU and
an ODM
If no ODM is configured, a CPRI fiber optic cable is directly connected to a BBU. If an ODM
is configured, a CPRI fiber optic cable is connected to the ODM.
Issue 01 (2015-01-15)Huawei Proprietary and Confidential
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
lThe 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.).
lThe 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.).
10 Installing AAU Cables
lThe bending radius of a power cable or PGND cable must be at least three times its diameter.
lThe 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.).
lThe bending radius of an E1/T1 cable must be at least three times its diameter.
lThe bending radius of a signal cable must be at least five times its diameter.
Cable binding requirements
lCables of the same type must be bound together.
lDifferent types of cables must be separately laid out and bound, with a minimum distance
of 30 mm (1.18 in.) from each other.
lThe cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.
lThe cable ties must face the same direction, and those at the same horizontal line must be
in a straight line.
lThe 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.
lAfter cables are installed, labels or nameplates must be attached to the cables at their ends,
curves, and interconnection positions.
Security requirements
lWhen routing cables, avoid sharp objects, for example sharp edges on the wall. If necessary,
use tubes to protect the cables.
lWhen routing cables, keep the cables away from heat sources and use heat insulation
materials to insulate the cables from the heat sources.
lReserve 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
lRoute each cable into the room through the feeder window.
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lReserve 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.
lWhen routing a cable into the room, ensure that a person is assisting you in the room.
lApply waterproof treatment to the feeder window.
Outdoor Cabling Requirements
lAfter 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.
lProtect outdoor cables against potential damage. For example, put the cables through tubes.
lThe cables to be protected include AC power cables, transmission cables, and cables laid
out underground.
lWhen 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.
lWhen 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.
lUse clips to secure cables outdoors. For the method of installing a clip, see the installation
guide delivered with the clip.
lArrange cables neatly along the routing direction and use clips to secure the cables.
lDetermine 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.
lWhen 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:
lA 3-hole clip is shown by illustration a in the following figure. It is often used to fasten feeders.
lA 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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lAfter 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.
lAfter 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
lPGND cables for a base station must be connected to the same group of ground bars.
lPGND cables must be buried in the ground or routed indoors.
lThe 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.
lPGND cables and signal cables must be installed separately. A certain distance must be
reserved between them to prevent interference from each other.
lSwitches or fuses must not be installed on the PGND cables.
lOther devices must not be used for electrical connections of the PGND cables.
lAll the metal parts in the housing of the equipment must be reliably connected to the ground
terminal.
Cabling of E1 cables
lE1 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.).
lE1 cables are lined up straight and bound neatly with cable ties.
lSufficient slack is provided for E1 cables at turns.
lE1 cables must not be pressed by the door of the cabinet when routed, as shown in the
following figure.
Figure 10-4 E1 cables routed in the cabinet
Cabling of fiber optic cables
lAt 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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lThe 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.
lDo not circle and twist cables.
lDo not bind a fiber optic cable at the position where it bends.
lDo not stretch, step on, or place heavy objects on fiber optic cables. Keep the fiber optic
cables away from sharp objects.
lWhen fiber optic cables are routed, the excess of the fiber optic cables must be coiled around
special devices, such as a fiber coiler.
lAn 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 10-5 Binding fiber optic cables
lWhen coiling fiber optic cables, apply even strength. Do not bend the fiber optic cables
with force.
lUnused optical connectors must be covered with dustproof caps.
lThe fiber optic cables must not be pressed by the door of the cabinet when routed, as shown
in the following figures.
Figure 10-6 CPRI fiber optic cables routed in the cabinet (1)
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Figure 10-7 CPRI fiber optic cables routed in the cabinet (2)
Figure 10-8 FE/GE fiber optic cables routed in the cabinet
lAfter 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.
lAfter 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.
lCoil the excess of the fiber optic cables near the equipment on the tower before securing
the cables on the tower.
10.2 Installing an AAU PGND Cable
This section describes the procedure and precautions for installing an AAU PGND cable.
Context
The following table lists the specifications of an AAU PGND cable.
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L, N, and PE terminals near the
OUTPUT silkscreen on the ODM
CAUTION
AAU power cables must be routed and protected according to the local laws and regulations,
industry standards, and operators' standards.
CAUTION
When installing an AAU power cable for a running base station, connect the cable to the AAU
before connecting it to the power system. An incorrect sequence or reverse connection of the
power cable will cause damage to the AAU or injuries to the human body.
Procedure
lProtecting an AAU power cable using a tube
1.Cut the cable to the length suitable for the actual cable route.
2.Before adding connectors to the cable, put the cable through a PVC corrugated pipe
or metal tube. The length of the PVC corrugated pipe or metal tube depends on the
length of the cable. Waterproof the PVC corrugated pipe or metal tube, and ground
both ends of the metal tube.
lPreparing an AAU power cable
1.Add a tool-less female connector (pressfit type) to the AAU's AC power cable. For
details, see 16.2 Adding a Tool-Less Female Connector (Pressfit Type) to an AAU
Power Cable on the AAU Side.
2.Add the corresponding connector to the end of the AAU power cable connected to
power equipment according to the type of the port on the power equipment.
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gel in the cable holes through which no cables are routed because silica gel is required
to provide the waterproof function.
2.Use insulation tape to wrap cord end terminals of the power cable to prevent sharp
edges of the cord end terminal from damaging silica gel.
3.Apply petroleum jelly to the power cable, and then route the power cable through a
cable hole.
4.Use the screwdriver delivered with the ODM to loosen screws on the terminals to
which the power cable is to be connected, and connect the terminals on the power
cable to the corresponding terminals, as shown by illustrations c and d in the following
figure.
5.Tighten the screws on the terminals of the power cable, as shown by illustration e in
the following figure.
6.Securely bind the power cable to the binding bracket, as shown by illustration f in the
following figure.
Figure 10-16 Connecting an AAU power cable to an ODM
(1) Screwdriver delivered with the ODM
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(1) CPRI fiber optic cable between
an AAU and a BBU
(2) CPRI fiber optic cable between
an AAU and an ODM
(3) CPRI fiber optic cable between
an ODM and a BBU
NOTE
l The single-mode optical module is labeled as SM and the multimode optical module is labeled as MM.
l The puller of a single-mode optical module is blue and the puller of a multimode optical module is
black or gray.
l The following figure shows the label on an optical module.
Figure 10-19 Label on an optical module
(1) Maximum rate
(2) Wavelength(3) Transmission mode
NOTICE
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.
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2.Insert the end of the pigtails with FC connectors to the adapter delivered with the
ODM, coil the fiber optic cable clockwise, and route the fiber optic cable through the
cable hole in the splicing tray, as shown in the following figure.
NOTE
This section uses FC connectors as examples. SC or LC connectors can be added to pigtails.
Figure 10-25 Connecting pigtails and coiling the fiber optic cable
lSplicing fiber and coiling the fiber optic cable
1.Put the heat shrink tubing onto the bare fiber at one end of the trunk fiber optic cable.
2.Use cloth dipped in detergent to clean the ends of the trunk fiber optic cable and
pigtails, and ensure that the spliced area is cleaned.
3.Use a fiber fusion splicer to splice the trunk fiber optic cable and pigtails.
4.Move the heat shrink tubing to the fiber splice point so that the tubing shrinks, and
install a protective cover to the trough to protect the fiber splice point.
5.Coil the trunk fiber optic cable counterclockwise and the pigtails clockwise in the
splicing tray, as shown in the following figure.
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To open the ODM case for maintenance, a minimum of 40 mm (1.57 in.) fiber optic cable
is reserved outside the ODM case, as shown in the following figure.
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Figure 10-27 Reserving slack of a CPRI fiber optic cable
a: Scenario in which a pole is used
(routing a cable along the inner
side of the pole)
lLay out the cables according to the instructions in Cabling Requirements, and use cable
ties to bind them.
lLabel the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
b: Scenario in which a pole is used
(routing a cable along the outer
side of the pole)
c: Scenario in which a wall is used
10.6 Installing a CPRI Fiber Optic Cable Between an AAU
and a BBU or Between an AAU and an ODM
If no ODM is configured, a CPRI fiber optic cable is directly connected to a BBU. If an ODM
is configured, a CPRI fiber optic cable is connected to the ODM.
Context
A CPRI fiber optic cable to be installed is shown by illustration 1 or 2 in the following figure.
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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.
lConnecting a CPRI fiber optic cable to an AAU
1.Route a CPRI fiber optic cable into the maintenance cavity through the rear of the
maintenance cavity.
2.Insert the optical connector into the optical module, as shown in the following figure.
Figure 10-30 Connecting a CPRI fiber optic cable to an AAU (a)
3.Press the fiber concentrator into the waterproof trough, as shown in the following
figure.
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the corresponding port on the fiber adapter, as shown by illustration a in the following
figure.
3.Use a finger to press the clip until it snaps into place, as shown by illustration b in the
following figure.
Figure 10-32 Connecting a CPRI fiber optic cable to an ODM
NOTICE
To open the ODM case for maintenance, a minimum of 40 mm (1.57 in.) fiber optic cable
is reserved outside the ODM case, as shown in the following figure.
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This section describes a procedure for installing a cord cover for an ODM after all cables are
installed.
Prerequisites
Procedure
Step 1 Optional: When an ODM is installed on a wall or ODM cables are routed along the outer side
lAn ODM has been installed.
lAll cables for the ODM have been installed.
of a pole, remove the part from the bottom of a cord cover, as shown in the following figure. If
cables are routed along the inner side of a pole, skip this step.
Figure 12-1 Removing a part
Step 2 Lift the cord cover so that the two round dowels on the top of the cord cover are inserted into
the holes on the bottom of the ODM, and push the cord cover upwards, as shown in the following
figure.
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AAU3940
Installation Guide13 Adjusting the Horizontal Azimuth of an Antenna
13 Adjusting the Horizontal Azimuth of an
Antenna
This section describes the procedure for adjusting the horizontal azimuth of an antenna based
on coverage requirements after all cables are installed.
Context
The normal line of an antenna is located on the front of the antenna, as shown in the following
figure. Before adjusting the horizontal azimuth of an antenna, determine the direction towards
which the antenna faces according to the normal line.
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