BTS3012AE Base Station Antenna System Installation Manual

HUAWEI BTS3012AE Base Station

Antenna System Installation Manual Contents

Issue 01 (2006-09-06) Huawei Technologies Proprietary i

Contents

1 Hardware Structure of the Antenna System.........................................................................1-1

1.1 Components...................................................................................................................................................1-2

1.2 Typical Hardware Structure...........................................................................................................................1-2

2 Installation Process of the Antenna System .........................................................................2-1

2.1 Installation Flow Chart..................................................................................................................................2-2

2.2 Installation Guide ..........................................................................................................................................2-3

3 Installation Preparations ..........................................................................................................3-1

3.1 Preparing Technical Documents....................................................................................................................3-2

3.2 Checking the Installation Environment .........................................................................................................3-2

3.3 Requirements for the Installation Personnel..................................................................................................3-2

3.4 Preparations by the Installation Personnel ....................................................................................................3-3

3.5 Preparing Tools and Instruments ...................................................................................................................3-4

3.6 Testing the Antenna .......................................................................................................................................3-4

3.7 Testing the TMA ...........................................................................................................................................3-5

3.8 Preparing the Feeder Connector ....................................................................................................................3-5

3.9 Assembling the Omnidirectional Antenna.....................................................................................................3-6

3.9.1 Omnidirectional Antenna Accessories .................................................................................................3-6

3.9.2 Assembling Procedure..........................................................................................................................3-8

3.10 Assembling the Directional Antenna ...........................................................................................................3-9

3.10.1 Directional Antenna Accessories........................................................................................................3-9

3.10.2 Assembling Procedure......................................................................................................................3-11

3.11 Hoisting the Antennas and Other Articles .................................................................................................3-12

4 Installing the Antenna System................................................................................................4-1

4.1 Installing the Grounding Bar.........................................................................................................................4-3

4.1.1 Structure of the Grounding Bar............................................................................................................4-3

4.1.2 Installation Requirements ....................................................................................................................4-3

4.1.3 Installation Procedure ..........................................................................................................................4-3

4.2 Installing the Antenna Support on a Tower Platform ....................................................................................4-5

4.2.1 Structure of the Antenna Support on a Tower Platform .......................................................................4-5


4.2.3 Installation Procedure ..........................................................................................................................4-6

Contents


Antenna System Installation Manual

ii Huawei Technologies Proprietary Issue 01 (2006-09-06)

4.3 Installing the Antenna Support on a Rooftop ................................................................................................4-8

4.3.1 Structure of the Antenna Support on a Rooftop ...................................................................................4-8


4.3.3 Installing the Antenna Support on a Rooftop Without Walls .............................................................4-10

4.3.4 Installing the Antenna Support on a Rooftop with Wall.....................................................................4-11

4.4 Installing the Omnidirectional Antenna on a Tower Platform.....................................................................4-13

4.4.1 Structure of the Omnidirectional Antenna on a Tower Platform........................................................4-13

4.4.2 Installation Requirements ..................................................................................................................4-14

4.4.3 Hoisting the Antennas and Other Articles ..........................................................................................4-14

4.4.4 Installation Procedure ........................................................................................................................4-15

4.5 Installing the Directional Antenna on a Tower Platform .............................................................................4-17

4.5.1 Structure of the Directional Antenna on a Tower Platform ................................................................4-17


4.5.3 Hoisting Antennas and Other Articles................................................................................................4-18


4.6 Installing the Omnidirectional Antenna on a Rooftop.................................................................................4-22

4.6.1 Structure of the Omnidirectional Antenna on a Rooftop....................................................................4-22




4.7 Installing the Directional Antenna on Rooftop............................................................................................4-24

4.7.1 Structure of the Directional Antenna on a Rooftop ............................................................................4-24




4.8 Making a Waterproof Curve........................................................................................................................4-28

4.8.1 Waterproof Curve at the Joint Between the 1/2-Inch Jumper and the Feeder ....................................4-28

4.9 Installing the TMA......................................................................................................................................4-29

4.9.1 Overview of the TMA........................................................................................................................4-29


4.9.3 Installing the TMA on the Tower .......................................................................................................4-29

4.9.4 Installing the TMA on the Fixed Link................................................................................................4-30

4.9.5 Installing the TMA on a Wall .............................................................................................................4-31

4.9.6 Installing the Jumpers of the TMA ....................................................................................................4-32

4.10 Installing Feeders and Antenna Jumpers ...................................................................................................4-34

4.10.1 Cutting Feeders and Attaching Temporary Labels ...........................................................................4-34

4.10.2 Hoisting and Fixing Feeders ............................................................................................................4-35

4.10.3 Connecting Jumpers Between the Antenna and the Feeder..............................................................4-38

4.10.4 Connecting Jumpers Between the TMA and the Feeder ..................................................................4-39

4.10.5 Laying and Fixing the Feeders.........................................................................................................4-40

4.10.6 Grounding the Feeders .....................................................................................................................4-44

4.11 Installing Jumpers......................................................................................................................................4-49


Antenna System Installation Manual Contents

Issue 01 (2006-09-06) Huawei Technologies Proprietary iii

4.11.1 Installation Requirements.................................................................................................................4-49

4.11.2 Installing the 1/4-Inch Jumpers ........................................................................................................4-50

4.11.3 Installing the 1/2-Inch Jumpers ........................................................................................................4-50

4.12 Installing the RET Antenna Components and Signal Cables ....................................................................4-50

4.12.1 Installing the Bias-Tee......................................................................................................................4-51

4.12.2 Installing the RCU ...........................................................................................................................4-52

4.12.3 Installing the SBT ............................................................................................................................4-55

4.12.4 Connecting the AISG Control Cables to the RCU ...........................................................................4-57

4.13 Testing the Antenna System ......................................................................................................................4-58

4.14 Waterproofing the Connectors...................................................................................................................4-59

5 Checking the Installation .........................................................................................................5-1

5.1 Checking the Feeders ....................................................................................................................................5-2

5.2 Checking the Grounding Bar.........................................................................................................................5-3

5.3 Checking the Antennas..................................................................................................................................5-3

5.4 Checking the Jumpers and the TMA.............................................................................................................5-5


Antenna System Installation Manual Figures

Issue 01 (2006-09-06) Huawei Technologies Proprietary v

Figures

Figure 1-1 Typical structure of the antenna system (installed on the rooftop with a single-polarization antenna

and without the TMA).........................................................................................................................................1-3

Figure 1-2 Typical structure of the antenna system (installed on the rooftop with dual-polarization antenna and

the TMA).............................................................................................................................................................1-4

Figure 1-3 Typical structure of the antenna system (installed on the tower with single-polarization antenna and

the TMA).............................................................................................................................................................1-5

Figure 2-1 Installation process of the BTS3012AE antenna system ..................................................................2-2

Figure 3-1 Simple protection treatment for a feeder connector..........................................................................3-6

Figure 3-2 Simple waterproof treatment for the connecting point of the feeder ................................................3-6

Figure 3-3 Outline of the omnidirectional antenna.............................................................................................3-7

Figure 3-4 Fixing clip for the omnidirectional antenna (1) ................................................................................3-7

Figure 3-5 Fixing clip for the omnidirectional antenna (2) ................................................................................3-8

Figure 3-6 Fixing the omnidirectional antenna ..................................................................................................3-9

Figure 3-7 Outline of the directional antenna...................................................................................................3-10

Figure 3-8 Fixing clip for the directional antenna ............................................................................................3-10

Figure 3-9 Pitch angle adjuster.........................................................................................................................3-11

Figure 3-10 Waterproofed connection of the jumpers and the directional antenna ..........................................3-12

Figure 3-11 Hoisting the directional antenna ...................................................................................................3-13

Figure 4-1 Structure of the grounding bar ..........................................................................................................4-3

Figure 4-2 Installation of the grounding bar.......................................................................................................4-4

Figure 4-3 Cutaway section of the grounding bar ..............................................................................................4-4

Figure 4-4 Structure of the antenna support on a tower platform (unit: mm).....................................................4-5

Figure 4-5 Installation of the lightning rod ........................................................................................................4-6

Figure 4-6 Installing the antenna support on a tower platform...........................................................................4-7

Figure 4-7 Structure of the antenna support on a rooftop...................................................................................4-9

Figure 4-8 Structure and installation of the antenna support base....................................................................4-10

Figure 4-9 Installing the fixing clip of the antenna support on the wall...........................................................4-11

Figure 4-10 Fixing the antenna support onto the wall (the height of the wall is more than 1200 mm)............4-12

Figures



vi Huawei Technologies Proprietary Issue 01 (2006-09-06)

Figure 4-11 Fixing the antenna support on the wall (the height of the wall is less than 1200 mm) .................4-13

Figure 4-12 Omnidirectional antenna on a tower platform ..............................................................................4-14

Figure 4-13 Fixing the omnidirectional antenna on a tower platform ..............................................................4-15

Figure 4-14 Installing the directional antenna on a tower platform..................................................................4-17

Figure 4-15 Relationship between the azimuth angle of the directional antenna and the sector ......................4-19

Figure 4-16 Diagram 1 (the directional antenna with the mounting hole corresponding to the pitch angle) ...4-20

Figure 4-17 Diagram 2 (the directional antenna with the mounting hole corresponding to the pitch angle) ...4-20

Figure 4-18 Angle display ................................................................................................................................4-21

Figure 4-19 Angle display before adjusting the pitch angle of the antenna......................................................4-21

Figure 4-20 Angle display after adjusting the pitch angle of the antenna.........................................................4-22

Figure 4-21 Installing the omnidirectional antenna on supports on a rooftop ..................................................4-23

Figure 4-22 Installing the directional antenna on a rooftop (without walls and with TMA)............................4-25

Figure 4-23 Installing the directional antenna on a rooftop (with a wall that is at least 1200 mm high and with a

TMA) ................................................................................................................................................................4-26

Figure 4-24 Waterproof curve at the joint between the 1/2-inch jumper and the feeder ..................................4-28

Figure 4-25 Installing the TMA on the tower ...................................................................................................4-30

Figure 4-26 Steel fastening bracket ..................................................................................................................4-30

Figure 4-27 Installing the TMA on the pole .....................................................................................................4-31

Figure 4-28 Installing the TMA on the wall .....................................................................................................4-32

Figure 4-29 Jumper between the antenna and the TMA...................................................................................4-33

Figure 4-30 Jumper between the TMA and the feeder .....................................................................................4-33

Figure 4-31 The jumper between the antenna and the TMA ............................................................................4-34

Figure 4-32 Protection of the feeder connector (unit: mm) ..............................................................................4-36

Figure 4-33 Fixing the upper end of the feeder on the tower ...........................................................................4-37

Figure 4-34 1-for-1 feeder fixing clip...............................................................................................................4-37

Figure 4-35 1-for-3 feeder fixing clip...............................................................................................................4-38

Figure 4-36 Connecting the jumper and the feeder ..........................................................................................4-38

Figure 4-37 Jumper between the antenna and the feeder..................................................................................4-39

Figure 4-38 Jumper between the TMA and the feeder .....................................................................................4-40

Figure 4-39 Fixing the feeders on the tower (using the 1-for-3 fixing clip) .....................................................4-41

Figure 4-40 Fixing the feeders on the tower (using the 1-for-2 fixing clip) .....................................................4-41

Figure 4-41 Laying the feeder from the tower top to the window....................................................................4-42

Figure 4-42 Feeders in the fixing clips.............................................................................................................4-43

Figure 4-43 Lightning protection grounding of the feeder (for the antenna installed on the tower) ................4-45


Antenna System Installation Manual Figures

Issue 01 (2006-09-06) Huawei Technologies Proprietary vii

Figure 4-44 Lightning protection grounding of the feeder down the cabling ladder........................................4-46

Figure 4-45 Installing the feeder grounding clips.............................................................................................4-47

Figure 4-46 Right direction of the grounding cable of the feeder grounding clip ............................................4-48

Figure 4-47 Connecting the grounding cable of the feeder grounding clip to the steel plate of the tower .......4-49

Figure 4-48 Bias-Tee ........................................................................................................................................4-51

Figure 4-49 RCU..............................................................................................................................................4-52

Figure 4-50 Removing the protective cap ........................................................................................................4-53

Figure 4-51 Adjusting the downtilt angle .........................................................................................................4-53

Figure 4-52 Adjustment spindle .......................................................................................................................4-54

Figure 4-53 Removing the black adjustment wheel .........................................................................................4-54

Figure 4-54 Installing the RCU ........................................................................................................................4-55

Figure 4-55 Smart Bias-Tee..............................................................................................................................4-56

Figure 4-56 Installing the SBT.........................................................................................................................4-56

Figure 4-57 Installing the SBT jumper.............................................................................................................4-57

Figure 4-58 Signal cable between the RCU and the SBT.................................................................................4-57

Figure 4-59 Installing the AISG control cables ................................................................................................4-58

Figure 4-60 PVC tape and waterproof insulation tape .....................................................................................4-59

Figure 4-61 Wrapping up the feeder with waterproof insulation tape ..............................................................4-59


Antenna System Installation Manual Tables

Issue 01 (2006-09-06) Huawei Technologies Proprietary ix

Tables

Table 2-1 Guide for the installation of the BTS3012AE antenna system ...........................................................2-3

Table 3-1 Technical documents for reference .....................................................................................................3-2

Table 3-2 Requirements for the supervisor and the installer...............................................................................3-3

Table 3-3 Preparations for different roles ...........................................................................................................3-3

Table 3-4 Special tools and instruments for antenna system installation............................................................3-4

Table 3-5 Requirements for hoisting the antenna and other articles .................................................................3-12

Table 4-1 Adjusting the pitch angle of the antenna...........................................................................................4-19

Table 4-2 Introduction of the TMA ports..........................................................................................................4-29

Table 4-3 Layout of feeders ..............................................................................................................................4-48

Table 5-1 Check items for the antenna system ...................................................................................................5-2

Table 5-2 Check items for the grounding bar of the BTS3012AE antenna system ............................................5-3

Table 5-3 Check items for the antennas of the BTS3012AE antenna system.....................................................5-3

Table 5-4 Check items for the jumpers and the TMA of the BTS3012AE antenna system................................5-5


Antenna System Installation Manual 1 Hardware Structure of the Antenna System

Issue 01 (2006-09-06) Huawei Technologies Proprietary 1-1

1 Hardware Structure of the Antenna System

About This Chapter

The following table lists the contents of this chapter.

Title Description

1.1 Components Introduces the component of the BTS3012AE antenna system.

1.2 Typical Hardware

Structure

Describes three typical hardware structures of the BTS3012AE

antenna system.




1-2 Huawei Technologies Proprietary Issue 01 (2006-09-06)

1.1 Components

The antenna system of the BTS3012AE consists of the following elements:

� Antenna, feeder, jumper

� Feeder grounding clip

� Tower Mounted Amplifier (TMA), optional

� Lightning arrester, optional

� Drive and control components of the Remote Electrical Tilt Unit (RET), optional

1.2 Typical Hardware Structure

Figure 1-1, Figure 1-2, and Figure 1-3 show three typical structures of the BTS3012AE

antenna system.




Figure 1-1 Typical structure of the antenna system (installed on the rooftop with a

single-polarization antenna and without the TMA)

1

10 2

3

4

5

6

7

9

8

(1) Directional antenna (2) Antenna jumper (3) Cabling rack

(4) Feeder fixing clip (5) Grounding clip Grounding

cables of the feeder grounding clip

(6) Grounding bar

(7) Cable connecting to the

lightning protection ground

(8) Cable connecting to the 1/2-inch

jumper

(9) Feeder

(10) Antenna support





Figure 1-2 Typical structure of the antenna system (installed on the rooftop with dual-polarization

antenna and the TMA)

9

1

2

3

4

5

6

8

7

(1) Directional antenna (2) TMA (3) Antenna jumper

(4) Cabling rack (5) Feeder fixing clip (6) Grounding bar

(7) Cable connecting to the

1/2-inch jumper

(8) Feeder (9) Antenna support




Figure 1-3 Typical structure of the antenna system (installed on the tower with single-polarization

antenna and the TMA)

10

1

2

12

3

11

4

5

6

7

8

9

(1) Lightning rod (2) Antenna support

(3) TMA (4) Directional antenna

(5) Waterproof curve of the jumper (6) Lightning protection grounding clip of the feeder

(7) Feeder (8) Cabling rack

(9) Cable connecting to the lightning

protection ground

(10) Tower grounding conductor

(11) Cable tie (12) Guard rail of the tower platform


Antenna System Installation Manual 2 Installation Process of the Antenna System


2 Installation Process of the Antenna System

About This Chapter


Title Description

2.1 Installation Flow Chart Describes the installation flow of the BTS3012AE antenna

system.

2.2 Installation Guide Describes the installation of the BTS3012AE antenna system.





2.1 Installation Flow Chart

Figure 2-1 shows the installation process of the BTS3012AE antenna system.

Figure 2-1 Installation process of the BTS3012AE antenna system

Install the grounding bar

Start

Install the antennasupport

Install the

antenna

TMA needs tobe installed?

Install the

TMA

Yes

No

Install and ground feeders

and jumpers

Test the BTS3012AE

antenna system

Pass the test ?

Warterproof the

connectors

Find and solvethe problem

Yes

No

End


Antenna System Installation Manual 2 Installation Process of the Antenna System


The method and process of installation vary according to the installation environment and the antenna.

The project supervisor should plan the installation according to the engineering documents, number of

personnel, installation environment, and type of the antenna.

2.2 Installation Guide

Table 2-1 shows the guide for the installation of the BTS3012AE antenna system.

Table 2-1 Guide for the installation of the BTS3012AE antenna system

Step Refer to section. . . Remark

Install the

grounding bar

4.1 Installing the Grounding

Bar

Optional if there is a grounding

bar that meets the requirements.

4.2 Installing the Antenna

Support on a Tower Platform

Install the antenna

support


Support on a Rooftop

Optional if there are antenna

supports that meet the

requirements

4.4 Installing the

Omnidirectional Antenna on a

Tower Platform

4.5 Installing the Directional

Antenna on a Tower Platform

4.6 Installing the


Rooftop

Install the antenna


Antenna on Rooftop

Mandatory

Refer to the corresponding

sections according to the antenna

type and installation location.

Make the

waterproof curve

4.8 Making a Waterproof Curve Mandatory

Install the TMA 4.9 Installing the TMA Optional

If the TMA is configured, the

TMA and the jumpers between

the antenna and the TMA need be

installed.

Install and ground

feeders and

jumpers

4.10 Installing Feeders and

Antenna Jumpers

Mandatory

Fix and ground the feeders with

grounding clips during

arrangement of the feeders and

jumpers.

Install the jumpers 4.11 Installing Jumpers Mandatory





Step Refer to section. . . Remark

Install the RET

signal cables

4.12 Installing the RET

Antenna Components and

Signal Cables

Optional

Test the

BTS3012AE

antenna system

4.13 Testing the Antenna

System

Mandatory

Waterproof the

connectors

4.14 Waterproofing the

Connectors

Mandatory


Antenna System Installation Manual 3 Installation Preparations


3 Installation Preparations About This Chapter


Title Description

3.1 Preparing Technical

Documents

Lists the technical documents for reference during

installation.

3.2 Checking the Installation

Environment

Describes the checklist of installation environment.

3.3 Requirements for the

Installation Personnel

Describes the requirements for the installation personnel.

3.4 Preparations by the

Installation Personnel

Describes the installation preparations.

3.5 Preparing Tools and

Instruments

Describes the tools and instruments for installation.

3.6 Testing the Antenna Describes how to test the antenna.

3.7 Testing the TMA Describes how to test the TMA.

3.8 Preparing the Feeder

Connector

Describes how to make the feeder connectors.

3.9 Assembling the

Omnidirectional Antenna

Describes how to assemble the omnidirectional antenna.

3.10 Assembling the

Directional Antenna

Describes how to assemble the directional antenna.

3.11 Hoisting the Antennas

and Other Articles

Describes how to hoist the antenna and other articles.

3 Installation Preparations




3.1 Preparing Technical Documents

Table 3-1 lists the technical documents for reference during installation.

Table 3-1 Technical documents for reference

To… Refer to the…

GSM Digital Cellular Mobile Base Station Network Planning

GSM Digital Cellular Mobile Base Station Project Design

Prepare the

engineering design

Engineering Design and Construction Drawings

BTS3012AE Base Station Antenna System Installation Plan the engineering

installation BTS3012AE Base Station Cabinet Installation

In addition to the two documents mentioned here, some others are available on site. The documents

mentioned here are only for your reference.

3.2 Checking the Installation Environment

During preparation,

� The project supervisor provides the Installation Environment Checklist.

� The customer representative and survey engineer carry out the first check.

� The customer representative and project supervisor carry out the second check.

If the installation environment does not meet the requirements, improve it until it is

satisfactory.

3.3 Requirements for the Installation Personnel

The project supervisor is in charge of the antenna system installation. The installers carry out

the installation.

Table 3-2 lists the requirements for the two roles.




Table 3-2 Requirements for the supervisor and the installer

Role Requirements

Project supervisor � Should be safety-conscious.

� Should be familiar with the materials, tools, and methods related to

the installation.

� Should be familiar with the installation process and the methods of

installing each part.

Tower installer � Should possess the relevant training certificates.

� Should be free of alcohol, in good health, and under the coverage of

personal safety insurance.

� Should use the safeties correctly.

� Should wear proper outfits and anti-slippery shoes during work.

3.4 Preparations by the Installation Personnel

Table 3-3 lists the preparations for each role.

Table 3-3 Preparations for different roles

Role Preparations

Project

Supervisor

Contacting customers on site to prepare the required instruments and

tools

Getting the keys to the rooms or roof corridor through which the

feeders will run

All persons on

site

Wearing safety helmets

Obtaining a first-aid kit

Persons under the

tower

Keeping unrelated persons, especially children, away from the

installation site

Taking care of installation parts and instruments to prevent loss or

damage

Persons on the

tower

Fastening safety belts.

Carrying the tool kit and some simple bandages such as handy plasts





� When more than one person needs to climb the tower, the person carrying the tool kit

should climb up last and climb down first in case that a falling tool injures others.

� Keep the tool kit closed during installation and open it only when necessary.

3.5 Preparing Tools and Instruments

Table 3-4 lists the special tools and instruments for installation.

The tool list for equipment installation includes other common tools such as percussion drill

and screwdrivers.

Table 3-4 Special tools and instruments for antenna system installation

Measuring Tools Angle display, compass

Suspension-Mounting Tools

Assembly pulley, two ropes (one thin and one thick, both 150

m long), feeder noose

Tools for Feeders Feeder nipper, cable cutter (applicable to the feeder), tools for

making feeders (1/2", 1/4"), blast lamp (to warm and soften the

waterproof and sealing materials in cold environment), antirust

aluminum print

Protective Tools Safety belts (for personnel operating out of the tower platform),

safety helmet

Safety ropes, thick union suits, RF protective clothing

Tools from the Local Customer

Double ladder, lifting tools for the main feeder wheel spindle

Others Canvas bag for tools, gloves, walkie-talkie, multi-purpose

outlets, wrench, screwdriver, skinning knife, and pliers

Test Tools Test mobile phone (optional), radio analyzer (such as

CELLMASTER and power meter), antenna and feeder

standing wave tester (such as SITEMASTER )


Add a post and cabling rack if there are none on site.

To ensure proper installation of the antenna system, test the antenna as follows before the

installation:




Step 1 Unpack a new antenna.

Step 2 Examine the antenna connectors for any visible damage or crack.

� If there are any: do not use it and contact the personnel concerned immediately. Go to

step 1.

� If there are none: go to the next step.

Step 3 Connect the antenna with a jumper.

Step 4 Use a radio analyzer to test the Voltage Standing Wave Ratio (VSWR) of the antenna in

different orientations.

� If the VSWR is higher than 1.5 in all orientations, there may be problems with the

antenna or its connectors. Go to step 5.

� If the VSWR is higher than 1.5 in some orientations, the antenna may not have problems.

The problem may lie in the external interference. Install the antenna and test its VSWR.

If the VSWR is still higher than 1.5, replace the antenna.

� If the VSWR is lower than 1.5, infer that the antenna is normal, and ready for

installation.

Step 5 Examine the connectors. If there are problems, replace the antenna and go to step 3. If the

connectors are fine, the antenna test is complete.

----End

3.7 Testing the TMA

Examine the TMA for any obvious damage before testing the VSWR of its two ports.

If the untested port is connected to a 50-ohm matched terminal load, the test is called the

power-off test. If the test result is different from the corresponding specification, infer that the

TMA is abnormal. Replace it.

Some TMAs must be powered on when the VSWR test is performed; otherwise, the test result

is not exact or the test cannot be performed.

If possible, power on the TMA and test its current. If the tested current is 50 –175 MA, infer that the

VSWR is normal.

3.8 Preparing the Feeder Connector

Feeder connectors need to be prepared on site. Connectors on the tower need to be made on

the ground and wrapped with sponge before installation, as shown in Figure 3-1.

The feeder has 7/16 DIN connectors at both ends. The connectors are made on site. Follow

the instructions and save the instructions for future use.





Figure 3-1 Simple protection treatment for a feeder connector

For feeder connectors that are not completed or not connected to jumpers, wrap them with waterproof

tapes, as shown in Figure 3-2.

You can also cover the connectors with plastic bags before wrapping them with waterproof tapes.

Figure 3-2 Simple waterproof treatment for the connecting point of the feeder

3.9 Assembling the Omnidirectional Antenna

This section describes how to assemble the omnidirectional antenna.

3.9.1 Omnidirectional Antenna Accessories

Figure 3-3 shows the outline of the omnidirectional antenna.




Figure 3-3 Outline of the omnidirectional antenna

The accessories of an omnidirectional antenna are:

� Antenna fixing clips (shown in Figure 3-4 and Figure 3-5)

� 1/2-inch jumper

Figure 3-4 Fixing clip for the omnidirectional antenna (1)





Figure 3-5 Fixing clip for the omnidirectional antenna (2)

2

3

1

(1) Fixing piece (2) U bolt M12x580 (3) Nut M12

There are various types of fixing clips for the omnidirectional antenna. Figure 3-4 and Figure 3-5 show

two types. The antenna installation method varies with the types of fixing clips. The following takes the

installation of the fixing clip shown in Figure 3-4 for example.

3.9.2 Assembling Procedure

To simplify the operations on the tower, assemble the directional antenna on the ground.

For the assembling method, see the instructions in the antenna packing box.

After assembling, keep the instructions for later reference.

Perform the following steps to assemble the omnidirectional antenna:

Step 1 Add the two fixing clips to the omnidirectional antenna.

Step 2 Tighten their connections at the contacting points, as shown in Figure 3-6.




Figure 3-6 Fixing the omnidirectional antenna

2

3

1

(1) Omnidirectional antenna (2) Antenna jacket (3) Fixing clip

Step 3 Connect the connector of the 1/2-inch antenna jumper to the antenna connector and tighten

the connectors.

Step 4 Waterproof the connectors that join the antenna and the feeder. See section 4.14

"Waterproofing the Connectors" for reference.

Step 3 and step 4 can be performed on the tower.

When waterproofing the connectors, wrap electric insulation tapes before wrapping semiconducting

self-adhesive tapes to facilitate the removal of the tapes later.

----End

3.10 Assembling the Directional Antenna

This section describes how to assemble the directional antenna.

3.10.1 Directional Antenna Accessories

Figure 3-7 shows the outline of the directional antenna.





Figure 3-7 Outline of the directional antenna

The accessories of directional antenna are:

� Antenna fixing clip (shown in Figure 3-8)

� Pitch angle adjuster (shown in Figure 3-9)

� 1/2-inch jumper

Figure 3-8 Fixing clip for the directional antenna




Figure 3-9 Pitch angle adjuster

3.10.2 Assembling Procedure

To simplify the operations on the tower, assemble the directional antenna on the ground.

For the assembling method, see the instructions in the antenna packing box.

After assembling, keep the instructions for later reference.

The procedure for assembling the directional antenna is as follows:

Step 1 Locate the fixed and adjusting points on the antenna with an angle play and an azimuth

instrument according to the labels at the back of the antenna.

The top is for the pitch angle adjuster and the bottom for fixing the antenna on the support.

Step 2 Install the accessories in the proper positions according to the accessory assembly drawings

provided by the supplier.

Step 3 Connect the connector of the 1/2-inch antenna jumper to the antenna connector and tighten

the connectors.

Step 4 Waterproof and seal the connecting point. See section 4.14 "Waterproofing the Connectors."

Figure 3-10 shows the waterproofed connection of the jumpers and the directional antenna.





Figure 3-10 Waterproofed connection of the jumpers and the directional antenna

----End

3.11 Hoisting the Antennas and Other Articles

Pay attention to the items listed in Table 3-5 when hoisting the antenna and other articles.

Table 3-5 Requirements for hoisting the antenna and other articles

Item Remark

Hoisting the

antenna

Adjust the ascending direction of the rope while hoisting to prevent the

antenna from colliding with the tower and getting damaged.

Personal safety When hoisting the antenna or other articles, ensure that nobody is

standing right below the hoisted object. The personnel working outside

the tower platform must wear safety belts and harnesses.

Packing articles Pack the small metal articles such as fixing pieces and spanners in a tool

bag and then hoist the bag.

Placing articles Secure the hoisted articles on the tower platform to prevent them from

falling off.

The procedure for hoisting antennas and other articles is as follows:

Step 1 Mount a fixed pulley on the tower top or on the rooftop, as the case may be.

Step 2 Run a rope through the pulley, and knot the rope at each end of the antenna.

Step 3 The personnel on the tower and those on the ground together hoist the antenna to the

installation location on the tower platform.

Figure 3-11 shows the hoisting of the antenna.




Figure 3-11 Hoisting the directional antenna

----End


Antenna System Installation Manual 4 Installing the Antenna System


4 Installing the Antenna System

About This Chapter


Title Description

4.1 Installing the Grounding

Bar

Describes how to install the grounding bar.


Support on a Tower Platform

Describes how to install the antenna support on a tower

platform.


Support on a Rooftop

Describes how to install the antenna support on a rooftop.

4.4 Installing the


Tower Platform

Describes how to install the omnidirectional antenna on a

tower platform.


Antenna on a Tower Platform

Describes how to install the directional antenna on a

tower platform.

4.6 Installing the


Rooftop

Describes how to install the omnidirectional antenna on a

rooftop.


Antenna on Rooftop

Describes how to install the directional antenna on a

rooftop.

4.8 Making a Waterproof

Curve

Describes how to make a waterproof curve.

4.9 Installing the TMA Describes how to install the TMA.

4.10 Installing Feeders and

Antenna Jumpers

Describes how to install the feeders and jumpers.

4.11 Installing Jumpers Describes how to install the 1/2-inch jumper and the

1/4-inch jumper.





Title Description

4.12 Installing the RET

Antenna Components and

Signal Cables

Describes how to install the RET antenna components

and signal cables.


System

Describes how to test the antenna system.

4.14 Waterproofing the

Connectors

Describes how to waterproof the connectors.




4.1 Installing the Grounding Bar

If the grounding bars are available, skip this section.

4.1.1 Structure of the Grounding Bar

The grounding bar is mainly used to connect the protection and work grounding cables of the

cabinet. Figure 4-1 shows its structure.

Figure 4-1 Structure of the grounding bar

1

330mm

(1) Bolt M8

4.1.2 Installation Requirements

Ensure that you fulfill the following requirements when installing the grounding bar:

� The grounding bar must be installed on the lightning protection grounding bar.

� The grounding bar must be installed horizontally.

� An insulating washer must be applied to the expansion bolt to ensure proper insulation of

the grounding bar from the wall.

� The grounding resistance must be less than 10 ohms.

4.1.3 Installation Procedure

Install the grounding bar as follows:

Step 1 Locate the installation place according to the engineering plan.

Step 2 Install the grounding bar.

� The grounding bar can be installed on the wall horizontally using expansion bolts, as

shown in Figure 4-2 and Figure 4-3.





Figure 4-2 Installation of the grounding bar

1

2

3

4

5

6

7

(1) Nut M12 (2) Spring washer 12 (3) Flat washer

(4) Insulation washer 1 (5) Grounding bar (6) Insulation washer 2

(7) Expansion tube and expansion bolt

Figure 4-3 Cutaway section of the grounding bar

1

23

4

5

6

7

(1) Nut M12 (2) Spring washer Φ12 (3) Big flat washer

(4) Insulating washer 1 (5) Grounding bar (6) Insulating washer 2

(7) Expansion tube and expansion nut

� The grounding bar can be installed on the lightning protection grounding bar.

----End




4.2 Installing the Antenna Support on a Tower Platform

If an appropriate antenna support is available on site, skip this section.

The equipment provider provides the design of the antenna support. The network operator

installs the antenna support.

The requirements for and methods of antenna support installation vary with the antenna types

and installation environments.

This section describes only one type of support on the tower platform. For other cases, see the

instructions delivered with the antenna support.

4.2.1 Structure of the Antenna Support on a Tower Platform

Several types of antenna supports can be installed on a tower platform. This section takes the

antenna support shown in Figure 4-4 as an example.

Figure 4-4 Structure of the antenna support on a tower platform (unit: mm)

8

5

4

12 3

6

7

9

(1) Bolt M12x220 (2) Connecting plate (3) Bolt M12x45

(4) Fixing link (5) Dwang (6) Stiffener

(7) Stiffener (8) Expansion link (9) U bolt






Fulfill the following requirements when installing the antenna support on a tower platform:

� The installation plane of the antenna support should be perpendicular to the level plane.

� The mast for the tower lightning rod should be installed separately. The lightning rod

should be high enough to bring all antennas under its protection, as shown in Figure 4-5.

Figure 4-5 Installation of the lightning rod

1

2

3

30 30° °

(1) Lightning rod (2) Antenna (3) Mast for the lightning rod

� The antenna support should be installed in the right direction to guarantee the Rx and Tx

performance and direction adjustment of the directional antenna.

� Hang the antenna support to avoid deformation.

� The dwang should be reinforced using a stiffener. The expansion link and dwang should

be trimmed to meet actual needs. The cross section should be sealed by welding it with a

plate for waterproof purpose.

� The dry and open welds should be eliminated. Select the support made of galvanized

steel should be selected. The support with the antirust aluminum paint should be coated.


Hoisting the Antenna Support onto a Tower

Perform the following steps:

Step 1 Mount a fixed pulley on the tower top.

Step 2 Use one or two ropes to hoist the support to the tower platform through the fixed pulley.

----End

When the support is going up, use another rope to maintain the direction of the rising support.




Positioning the Antenna Support

Determine the installation position of the antenna support on the tower platform according to

the installation drawing in the engineering design.

Fixing the Antenna Support


Step 1 Hang the support from the tower platform.

Step 2 Fix the support to the tower using a U fixing clip (including the connecting piece and the U

bolt) so that it extends from the tower, as shown in Figure 4-6.

Figure 4-6 Installing the antenna support on a tower platform

2

3

4

1

(1) Expansion link (2) Connecting post (3) Crossbeam of the tower (4) U bolt

Step 3 Connect the guardrails on the tower platform with the connecting plate using bolts M12x45.

If it is difficult to connect the connecting plate to the guardrail, weld the two parts securely. Ensure that

there is no dry or open weld.

Step 4 Coat all the welds and the support with antirust paint.

----End





4.3 Installing the Antenna Support on a Rooftop

If an appropriate antenna support is available on site, skip this section.

The equipment provider provides the design of the antenna support. The network operator

installs the antenna support.

The requirements for and the installation methods of the support vary with antenna types and

installation environment.

This section describes how to install one type of support. For the other types of support, see

the instructions delivered with the antenna support.

4.3.1 Structure of the Antenna Support on a Rooftop

Several types of antenna supports can be installed on a rooftop. Take the one shown in Figure

4-7 as an example.




Figure 4-7 Structure of the antenna support on a rooftop

5

6

7

3

1

2

4

8

(1) Antenna lightning rod (2) Weld (3) Main supporting post 2

(4) Bolt M10x50 (5) Stiffener (6) Main supporting post 1

(7) Mat of the support post (8) Expansion bolt M12x60


Fulfill the following requirements when installing the antenna support on a rooftop:

� The connecting pieces for the stiffener should be installed only in the places where they

do not impede adjustment of the antenna orientation and pitch angle.

� The antenna support should be perpendicular to the level plane.

� For the installation of the directional antenna on the rooftop, the antenna support should

have a lightning rod and the rod should be connected to the lightning net of the building.

� For the installation of the omnidirectional antenna on the rooftop, the lightning rod

should be installed on a separate support instead of the antenna support.

� If the lightning rod is installed on the support of the omnidirectional antennas, the

antennas should be hung 1 m–1.5 m from the support.





� The antenna support and all welded parts should be coated with antirust paint. All the

welds should be connected securely. Dry and open welds should be removed.

� The height of the antenna should meet all the requirements for lightning protection.

4.3.3 Installing the Antenna Support on a Rooftop Without Walls


Step 1 Hoist the antenna support onto the rooftop.

Figure 4-8 Structure and installation of the antenna support base

1

2

3

(1) Hex bolt M10x50 (2) Connecting piece of the stiffener

(3) Main supporting post of the antenna

Step 2 Determine the installation location of the antenna support on the rooftop according to the

antenna and feeder installation drawing in the engineering design drawings.

Step 3 Weld the lightning rod to the main supporting post of the antenna (with their centerlines on

the same straight line).

Step 4 Connect the stiffener to the main supporting post with the connecting piece. Fix the stiffener

with two M12x60 expansion bolts, as shown in Figure 4-7.

Step 5 Connect the main supporting posts 1 and 2 of the support securely using six bolts M10x50.




Step 6 Connect the support base to the lightning protection net with the lightning protection

connection strap (the mounting piece of the cabling rack) in the following situations:

� The antenna support is not welded with the cabling rack on the rooftop.

� The antenna support is welded with the cabling rack but not connected to the lightning

protection net.

Step 7 Coat the antenna support base and all the welded parts with antirust paint.

Step 8 Cover the base of the antenna support on the rooftop, the anchor of the stiffener, and their

expansion bolts using the concrete.

----End

4.3.4 Installing the Antenna Support on a Rooftop with Wall

If the rooftop is enclosed with walls, install the antenna support on a wall. Figure 4-9 shows

how to mount the fixing clip of the antenna support on the wall.

Figure 4-9 Installing the fixing clip of the antenna support on the wall

1

2

3

7 8

4 5 6

(1) Expansion bolt M12x80 (2) V connecting piece (3) 180 connecting piece

(4) Nut (5) Spring washer (6) Flat washer

(7) Bolt M12x140 (8) Fixing plate

When the wall is more than 1200 mm high, use expansion bolts and fixing clips to fix the

support on the wall, as shown in Figure 4-10.





Figure 4-10 Fixing the antenna support onto the wall (the height of the wall is more than 1200

mm)

12

00

When the height of the wall is less than 1200 mm, fix one fixing point of the main supporting

post on the wall using expansion bolts and fix the other fixing point on the surface of the

rooftop, as shown in Figure 4-11.




Figure 4-11 Fixing the antenna support on the wall (the height of the wall is less than 1200 mm)

4.4 Installing the Omnidirectional Antenna on a Tower Platform

� Check if the antenna is waterproof and if there is any crack or damage.

� If the RET antenna and TMA are installed already, check whether the feed is operational after the

antenna is installed.

4.4.1 Structure of the Omnidirectional Antenna on a Tower Platform

Figure 4-12 shows the omnidirectional antenna on a tower platform.





Figure 4-12 Omnidirectional antenna on a tower platform

1

3

4

6

5

7

2

(1) Tower (2) Antenna support at the tower top (3) Omnidirectional antenna

(4) Waterproof curve of the jumper (5) Stiffener (6) Cable tie

(7) TMA


Fulfill the following requirements when installing the omnidirectional antennas on a tower

platform:

� The antenna should be within the coverage of lightning protection and should be at least

2 m away from the body of the tower.

� The antenna axis should be perpendicular to the level plane with a permissible error of

±1o.

� The antenna isolation should be higher than 30 dB. The space between the antennas

should be adjusted according to the antenna gain during the installation. See Appendix A

"Requirements for Antenna Spacing."

� Waterproof curves should be made for the 1/2-inch jumper.

4.4.3 Hoisting the Antennas and Other Articles

Carry or hoist antennas and other articles to the tower platform. Prevent the articles from

colliding with other objects.

For details on how to hoist the antennas, see section 3.11 "Hoisting the Antennas and Other

Articles."





Install the omnidirectional antenna on a tower platform as follows:

Positioning the Antenna

Determine the installation location of the antenna according to the engineering design

drawings.

Fixing the Antenna to the Support


Step 1 Place the feeding point of the antenna facedown and the sheathing near the main supporting

post of the support.

Step 2 Fix the antenna to the fixing bar of the support, as shown in the left part of Figure 4-13.

� The sheathing top should be at the same height as or slightly higher than the support top.

� The transmission part of the antenna must be higher than the top of the fixing bar.

� The antenna must be installed neither too tightly nor too loosely to prevent the sheathing from

getting damaged easily and the antenna from falling off easily.

Figure 4-13 Fixing the omnidirectional antenna on a tower platform

6

5

4

12

3

7

(1) Omnidirectional antenna (2) Antenna fixing clip (3) Fixing bar

(4) Connecting piece (5) Crossbeam of the tower (6) U bolt

(7) Waterproof curve of the jumper

Step 3 Use an angular tester to check whether the antenna axis is perpendicular.





� If the error is equal to or greater than ±1o, adjust the antenna and go to step 2.

� If the error is smaller than ±1, go to the next step.

Step 4 Fasten the antenna.

----End

Laying the 1/2-Inch Antenna Jumper


Step 1 Make a waterproof curve for the 1/2-inch antenna jumper. For details, see section 4.8

"Making a Waterproof Curve."

Step 2 Lay the jumper along the crossbar of the support and bind the jumper and crossbar together

using black cable ties. Cut off the extra tail of the cable ties.

� Bend the jumpers in a natural manner. The bending radius should be 20 times longer than the jumper

diameter.

� Bind the cable ties in the same direction. When cutting the cable ties, leave a slack of 5 mm to 10

mm in case that the cable ties fall off the jumper because of temperature change.

� The shear plane must be smooth so that it does not hurt operators.

----End

Fixing the Dwang of the Support

Step 1 Hang the dwang of the support installed with the antenna such that it extends from the tower

platform.

Step 2 Use bolts to fix the connecting panel.

The installation of the omnidirectional antenna on the tower platform is complete.

If there is no guardrail on the tower platform, set up a stout wood access board across the arms of the

two supports to form a working platform for the safety of the installation personnel.

After installing the antenna, TMA, and feeders on one side, change the location of the wood board on

the support arms to fix other antennas, TMA, and feeders.

----End




4.5 Installing the Directional Antenna on a Tower Platform

� Check whether the antenna is waterproof and whether there is any crack or damage.

� If the RET antenna and TMA are installed, check whether the feed is operational after the antenna is

installed.

4.5.1 Structure of the Directional Antenna on a Tower Platform

Figure 4-14 shows the installation of the directional antennas on a tower platform.

Figure 4-14 Installing the directional antenna on a tower platform

6

1

2

3

7

4

5

(1) Tower (2) Antenna support on the top

of the tower

(3) Directional antenna

(4) Waterproof curve for the

jumper

(5) Stiffener (6) Cable tie

(7) TMA


Fulfill the following requirements when installing directional antennas on a tower platform:

� All the antennas should stand within the protection coverage of the lightning rod. No

interference from the tower structure should exist in the forward direction of the antenna.

The antenna must be more than 1 m away from the tower platform.





� The isolation degree should be 30 dB and the semi-power angle should be 65°. For

details about the antenna interval, see Appendix A "Requirements for Antenna Spacing."

� Waterproof curves should be made for the 1/2-inch jumper.

� The jumpers should be bent in a natural manner, and the minimum bending radius of the

jumper should be 20 times or even longer than the jumper diameter.

� The cable ties should be bound in the same direction. A slack of 5 mm to 10 mm should

be left to prevent the cable ties from falling off the jumper because of temperature

change. The shear plane must be smooth so that it does not hurt operators.

� The main port and the diversity port of two 2-way directional antennas of the same type

should be consistent. For example, the –45° port is the main port, and the 45° port is the

diversity port.

4.5.3 Hoisting Antennas and Other Articles

Carry or hoist the antennas and other articles to the tower platform. Keep the articles from

colliding with other objects.

For details on how to hoist antennas and the key points to remember, see section 3.11

"Hoisting the Antennas and Other Articles."


� Protect the installed jumpers from damage when installing and adjusting the antenna.

� When using the compass, keep it away from the tower and other iron and steel objects. Be careful of

any geomagnetic abnormality that can interfere in the accurate operation of the compass.

Install the directional antenna on a tower platform as follows.


Determine the installation direction of the antenna according to the project installation

drawings.



Step 1 Fix the antenna to the main supporting post.

The antenna should be installed properly to prevent the sheathing from getting damaged easily and the

antenna from falling off easily.

Step 2 Adjust the azimuth angle of the antenna.

Determine the azimuth angle using a compass according to the engineering design. Normally,

sector 1 is in the north. Sector 2 lies in the clockwise 120° direction. Sector 3 lies in the next

clockwise 120° direction. See Figure 4-15.




Figure 4-15 Relationship between the azimuth angle of the directional antenna and the sector

Sector 1

120°

120°

Sector 2Sector 3

120°

Adjust the azimuth angle until it fulfills the design specifications. The error of the azimuth

angel should not be greater than 5°.

Step 3 Fasten the lower fixing clip of the antenna until it cannot be moved.

----End

Adjusting the Pitch Angle of the Antenna

Table 4-1 describes the adjusting methods of the pitch angle of the antenna. You can adjust the

pitch angle of the antenna according to the actual situation.

Table 4-1 Adjusting the pitch angle of the antenna

Type of Directional Antenna

Adjusting Methods of the Pitch Angle

The mounting hole maps with

the pitch hole.

� Use an angle play to ensure that the post is vertical. The

post should not tilt beyond 0.5 degree.

� Install the antenna according to the mounting hole as

shown in Figure 4-16 and Figure 4-17. Ensure that the

post is upright.

The mounting hole does not

map with the pitch hole.

� Determine the pitch angle with an angle play as shown

in Figure 4-18 and Figure 4-19.

� Move the antenna to adjust the pitch angle until the

engineering requirements are met, as shown in Figure

4-20. Generally, the error of the pitch angle should not

be more than 0.5o.

� Tighten the fixing clip on the upper part of the antenna

until it is secure.





Figure 4-16 Diagram 1 (the directional antenna with the mounting hole corresponding to the pitch

angle)

Figure 4-17 Diagram 2 (the directional antenna with the mounting hole corresponding to the pitch

angle)




� When the mounting hole of the directional antenna corresponds to the pitch angle, the mounting hole

number is decided by the pitch angle.

� When the mounting hole of the directional antenna does not correspond to the pitch angle, the

mounting hole is decided by the mounting hole number.

Figure 4-18 Angle display

Figure 4-19 Angle display before adjusting the pitch angle of the antenna





Figure 4-20 Angle display after adjusting the pitch angle of the antenna



Step 1 Make a waterproof curve for the 1/2-inch antenna jumper at the end that is close to the

antenna. For making the waterproof curve, see section 4.8 "Making a Waterproof Curve."

Step 2 Lay the jumpers along the crossbar of the support and bind the crossbar and the jumpers using

black cable ties.

Step 3 Cut the extra tails off the cable ties.

----End

Fixing the Dwang of the Support


Step 1 Hang the dwang of the support installed with the antenna such that it extends from the tower

platform.

Step 2 Use bolts to fix the connecting panel.

----End

4.6 Installing the Omnidirectional Antenna on a Rooftop

Check whether the antenna is waterproof and whether there is any crack or damage.

If the RET antenna and TMA are installed already, check whether the feed is operational after the


4.6.1 Structure of the Omnidirectional Antenna on a Rooftop

Figure 4-21 shows the installation of the omnidirectional antennas on supports on a rooftop.




Figure 4-21 Installing the omnidirectional antenna on supports on a rooftop

3

1

2

4

7

5

6

(1) Antenna lightning rod (2) Antenna (3) Fixing clip for the omnidirectional antenna

(4) Main supporting post (5) Road (6) Rooftop (7) Stiffener


The requirements regarding the isolation and the installation interval of the omnidirectional

antennas are the same as those for installing the omnidirectional antennas on the tower

platform. For details, see section 4.4.2 "Installation Requirements."

Fulfill the following requirements during the installation:

� The antenna should be kept away from barriers such as high-rise buildings to avoid blind

areas.

� If there is no lightning rod on the top of the antenna support, a lightning rod should be

installed separately. The horizontal distance between the omnidirectional antenna and the

lightning rod should be at least 2.5 m. In addition, the antenna should be within the

lightning protection coverage, and the tilt angle of the lightning rod should be 30°.

� If there is a lightning rod on the top of the antenna support, the antenna should be hung

over the support such that it extends a distance of 1 m to 1.5 m from the support.


Carry or hoist the antennas and other articles to the rooftop. Keep the articles from colliding

with other objects. For the details on how to hoist antennas and the key points to remember,

see section 3.11 "Hoisting the Antennas and Other Articles."






� Bend the jumpers in a natural manner. The bending radius should be 20 times longer than

the jumper diameter.

� Bind the cable ties in the same direction.

� When cutting the cable ties, leave a slack of 5 mm to 10 mm in case that the cable ties fall

off the jumper because of temperature change. The shear plane must be smooth so that it

does not hurt operators.

The procedure for installing the omnidirectional antenna on the rooftop is as follows:

Step 1 Determine the installation location of the antenna according to the engineering design

drawings.

Step 2 Place the feeding point of the antenna facedown and the sheathing near the main supporting

post of the support, and then fix the antenna to the fixing bar of the support.

� The top end of the sheathing should be at the same height as or slightly higher than the support top.

� The transmission part of the antenna should be higher than the top of the fixing bar.

� Fix the antenna with appropriate tightness so that it has sufficient weight-bearing capacity and wind

resistance. Avoid loose connection and damage to the antenna sheathing.

Step 3 Use an angular tester to check whether the antenna axis is perpendicular to the horizontal

plane. If the error is equal to or greater than !1o, adjust and re-fasten it.

Step 4 Tighten the antenna until the antenna cannot be moved by a pull or push.

Step 5 Make the waterproof curve of the jumper, lay the jumper along the crossbar of the support,

and bind the jumper and the crossbar using black cable ties. Cut off the extra tail of the cable

ties. For details on how to make a waterproof curve, see section 4.8 "Making a Waterproof

Curve."

----End

4.7 Installing the Directional Antenna on Rooftop

� Check whether the antenna is waterproof and whether there is any crack or damage.

� If the RET antenna and TMA are installed already, check whether the feed is operational after the


4.7.1 Structure of the Directional Antenna on a Rooftop

Figure 4-22 and Figure 4-23 show the installation of directional antennas on a rooftop.




Figure 4-22 Installing the directional antenna on a rooftop (without walls and with TMA)

1

2

3

4

5

(1) Antenna (2) TMA (3) Cable tie

(4) Feeder (5) Stiffener





Figure 4-23 Installing the directional antenna on a rooftop (with a wall that is at least 1200 mm

high and with a TMA)

1

2

3

4

5

(1) Antenna (2) Cable tie (3) TMA (4) Jumper (5) Feeder


The requirements regarding the isolation degree and the installation interval of the directional

antennas are the same as those for installing the directional antennas on the tower platform.

For details, see section 4.5.2 "Installation Requirements." In addition, note the following

points:

� Keep the antennas away from the barriers such as high-rise buildings so that no signal

blind area is caused when installing the antennas.

� Install a lightning rod for the support.

� Bend the jumpers in a natural manner. The bending radius should be 20 times longer than

the jumper diameter.

� Bind the cable ties in the same direction. For the cuttings, leave a slack of 5 mm to 10

mm to prevent the tape from falling off the jumper because of temperature changes. The

shear plane must be smooth so that it does not hurt operators.

� The main port and the diversity port of two 2-way directional antennas of the same type

should be consistent. For example, the –45° port is the main port, and the 45° port is the

diversity port.





Carry or hoist the antennas and other articles to the rooftop. Keep the articles from colliding

with other objects. For details on how to hoist antennas and the key points to remember, see

section 3.11 "Hoisting the Antennas and Other Articles."


� Protect the installed jumpers from damage when installing and adjusting the antenna.

� When using the compass, keep it away from the tower and other iron and steel objects. Be careful of

any geomagnetic abnormality that can interfere in the accurate operation of the compass.

Install the directional antenna on the rooftop as follows:


Determine the installation direction of the antenna according to the project installation

drawings.



Step 1 Fix the antenna to the main supporting post with appropriate tightness so that it has sufficient

weight-bearing capacity and wind resistance. Avoid loose connection or damage to the

antenna sheathing.

Step 2 Adjust the azimuth angle of the antenna.

Normally, sector 1 is in the north. Sector 2 lies in the clockwise 120° direction and sector 3 in the next

clockwise 120° direction, as shown in Figure 4-15. Adjust the pitch angle until it satisfies the design

specification. Usually, the error of the azimuth angel is not greater than 5°.

Step 3 Tighten the lower fixing clip of the antenna until it cannot be moved by a pull or push.

----End

Adjusting the Pitch Angle of the Antenna

See Table 4-1 for the methods of adjusting the pitch angle of the antenna.



Step 1 Make a waterproof curve for the 1/2-inch antenna jumper at the end that is close to the

antenna. For details on how to make a waterproof curve, see section 4.8 "Making a

Waterproof Curve."

Step 2 Lay the jumpers along the support and bind the jumpers and the support using a black cable

tie.

Step 3 Cut off the extra tail of the cable tie.





----End

4.8 Making a Waterproof Curve

Make a waterproof curve at the joint between the 1/2-inch jumper and the feeder: This is to prevent

water from running in, and thus generating the standing wave alarm and affecting the network quality.

4.8.1 Waterproof Curve at the Joint Between the 1/2-Inch Jumper and the Feeder

Make the waterproof curve as follows:

� When the 1/2-inch jumper connects to the feeder horizontally:

− Bend the jumper (at 1/2 point of the jumper) with a radius of 20 cm to form a 90° arc.

− Bend the feeder (at 7/8 point of the feeder) with a radius of 50 cm to form a 90° arc in

the horizontal cabling part.

� When the 1/2-inch jumper connects to the feeder vertically (that is, the jumper and

feeder are bundled in the same post), curve the jumper into a circle with a radius of 20

cm in front of the joint between the jumper and the feeder.

The waterproof curve at the joint between the 1/2-inch jumper and the feeder is shown in

Figure 4-24.

Figure 4-24 Waterproof curve at the joint between the 1/2-inch jumper and the feeder




4.9 Installing the TMA

Skip this section if it is not necessary to install the TMA.

4.9.1 Overview of the TMA

The TMA is installed to amplify receive signals. The installation position is close to the

antenna, and the closer, the better. The shell of the TMA performs heat dissipation.

There are three types of TMA, simplex, duplex, and triplex.

This manual mainly describes the triplex TMA.

Table 4-2 describes the TMA ports.

Table 4-2 Introduction of the TMA ports

TMA Type

Port Name

Connector Type

Connect to . . . Remark

Antenna 7/16DIN

female

The 1/2-inch antenna jumper Triplex

TMA

BTS 7/16DIN

female

The RF interface (7/16DIN

connector) on the BTS

cabinet top through a jumper

and a feeder

The two connectors

may be located on

different ends of the

TMA or on the same

end.


Fulfill the following requirements when installing the TMA:

� The TMA should be installed as close to the antenna as possible.

� For installation on the tower, the TMA should be installed on the guardrail of the tower

platform, as shown in Figure 4-12.

� For installation on the rooftop, the TMA should be installed on the supporting post lower

than the antenna, as shown in Figure 4-22. If the TMA cannot be installed on the

supporting post, it should be installed on the wall, as shown in Figure 4-23.

� For the TMA with connectors on both sides, the connectors that connect to the antenna

upward and the ones connecting to the BTS downward should be installed.

� For the TMA with connectors on the same side, the connectors should be installed

downward.

4.9.3 Installing the TMA on the Tower


Step 1 Hoist the TMA and the accessories to the tower.

Step 2 Determine the installation position.





Step 3 Put the long bolt through the hole in the TMA support and then through the hole in the

fastener. Secure the bolt.

Step 4 Connect the end of the antenna jumper that connects the antenna to the Antenna port on the

TMA.

Step 5 Connect the end of the antenna jumper that connects the feeder to the BTS port on the TMA.

----End

The installation is complete. See Figure 4-25

Figure 4-25 Installing the TMA on the tower

4.9.4 Installing the TMA on the Fixed Link

Steel fastening brackets, as shown in Figure 4-26, are used to fix the TMA on the tower top.

Figure 4-26 Steel fastening bracket

To prevent the TMA from falling, two installers are required.





Step 1 Hoist the TMA together with the accessories onto the tower platform.

Step 2 Lead the end without bolt through the holes on the installation support of the TMA.

Step 3 Lead the bracket around the pole and get the end without bolt through the slit on the other end

beneath the bolt.

Step 4 Fasten the bolt to fix the TMA on the tower or pole, as shown in Figure 4-27.

Figure 4-27 Installing the TMA on the pole

1

2

3

4

(1) Main supporting post (2) TMA port Antenna (3) TMA (4) TMA port BTS

Step 5 Connect the grounding pole of the TMA to the grounding point securely using grounding

cables.

----End

4.9.5 Installing the TMA on a Wall

Fix the TMA on the wall with expansion bolts as follows:

Step 1 Carry the TMA and installation components to the rooftop.

Step 2 Determine the installation position of the TMA.





Step 3 Fix the TMA on the wall with expansion bolts, as shown in Figure 4-28.

Figure 4-28 Installing the TMA on the wall

1

2

3

(1) Antenna port of the TMA (2) TMA (3) Expansion bolt

Step 4 Ground the grounding post of the TMA.

----End

4.9.6 Installing the Jumpers of the TMA

The jumpers of the TMA include:

� The jumper between the antenna and the TMA (2.5 m), as shown in Figure 4-29.

� The jumper between the feeder and the TMA (1.5 m), as shown in Figure 4-30.




Figure 4-29 Jumper between the antenna and the TMA

1

2

(1) To TMA (2) To the antenna

Figure 4-30 Jumper between the TMA and the feeder

1

2

(1) To the TMA (2) To the feeder

The procedure for installing these two kinds of jumpers is as follows:

Step 1 Screw the connector of the antenna jumper to the Antenna port of the TMA.

Step 2 Make the waterproof curve. Bend the jumper in a natural manner. The minimum bending

radius of the jumper should be 20 times longer than the jumper diameter. See section 4.8

"Making a Waterproof Curve."

Step 3 Tie the jumper with a black cable tie and attach the label to the jumper.





� The label should be attached 100 mm away from the end of the jumper, as shown in Figure 4-31.

� Only one label is required for each jumper because the jumper is usually very short.

� Bind the cable ties in the same direction. When cutting the cable ties, leave a slack of 3 mm to 5 mm

to prevent the cable ties from falling off the jumper because of temperature change. The shear plane

must be smooth so that it does not hurt operators.

Figure 4-31 The jumper between the antenna and the TMA

1

2

3

4

(1) Guardrails on the tower platform (2) TMA (3) Jumper label

(4) Waterproof curve of the jumper

Step 4 Screw the connector of the 1/2-inch feeder jumper to the TMA and reserve the other

connector.

----End

4.10 Installing Feeders and Antenna Jumpers

This section describes the procedure for installing the feeders and jumpers.

4.10.1 Cutting Feeders and Attaching Temporary Labels

Cut the feeders either before the hoisting or after the feeders are hoisted and fixed in position.

In the latter case, reserve sufficient length for the feeders when they are being fixed in

position.

The procedure for cutting the feeder is as follows:




When cutting the feeder, do not bend it. Prevent it from getting tangled or stepped on by

vehicles or pedestrians.

Step 1 Determine the length of the feeders required in each sector according to the engineering

design drawings.

Step 2 Cut the feeder based on the determined length, and leave a slack of 1 m to 2 m.

Step 3 After cutting the feeder, attach the temporary labels at both ends and at the middle of the

feeders.

� For information about feeder labels, see Appendix B "Engineering Labels for Antenna System."

� The content of the temporary label is the same as that of the formal engineering label. Remove the

temporary labels before attaching the formal ones.

----End

4.10.2 Hoisting and Fixing Feeders

Be careful while hoisting the feeder. Do not hoist the feeder violently in case that the feeder

jacket is damaged.

The procedure for hoisting and fixing the feeders is as follows:

Step 1 Wrap the feeder end in a piece of gunny cloth (or antistatic bag) after the corresponding

connector is made. Bind the cloth up using a rope or cable tie.

Step 2 Knot the lifting rope round the feeder at the point that is 0.4 m from the end and tie another

knot at the point that is 4.4 m from the feeder end to prepare for the hoisting, as shown in

Figure 4-32.





Figure 4-32 Protection of the feeder connector (unit: mm)

2

4

4000

400

5

1

3

(1) Feeder connector (2) Wrapped connector (3) Lifting rope

(4) Knot (5) Feeder

Step 3 The person on the tower pulls up the rope and the person on the ground keeps pulling the rope

to avoid any damage to the antenna because of collisions with the building or tower.

Step 4 Fix the upper part of the feeder at multiple points (not near the antenna or the TMA) to

prevent it from slipping, as shown in Figure 4-33. Select the fixing clips (1-for-1 or 1-for-3)

as shown in Figure 4-34 and Figure 4-35.




Figure 4-33 Fixing the upper end of the feeder on the tower

1

2

3

3

2

1

(1) C-shaped fixing clip (2) Feeder (3) Cabling rack (hexagonal steel)

Figure 4-34 1-for-1 feeder fixing clip





Figure 4-35 1-for-3 feeder fixing clip

----End

4.10.3 Connecting Jumpers Between the Antenna and the Feeder

Figure 4-36 shows the jumper between the antenna and the feeder. The jumper is 3.5 m, as

shown in Figure 4-37.

Figure 4-36 Connecting the jumper and the feeder

12

3

4

(1) Feeder (2) Metal label of the feeder (3) Encapsulated connector (4) Jumper

Encapsulate the connectors of the jumpers and the feeders after the antenna system is installed and tested.

This is to facilitate replacing the feeders or jumpers.

Figure 4-36 shows the connection of the jumper and the feeder after the antenna system is

installed and tested.




Figure 4-37 Jumper between the antenna and the feeder

1

2

(1) To the feeder (2) To the antenna

The procedure for installing the jumpers between the antenna and the feeder is as follows:

Step 1 Connect the antenna jumper to the feeder. Bend the jumper in a natural manner.

The minimum bending radius should be 20 times longer than the feeder diameter.

Step 2 Bind the jumpers and label them using metal labels.

----End

� Attach the label 100 mm away from the end of the jumper. Attach one label for each jumper because

the jumper is usually very short.

� Bind the cable ties in the same direction. Leave a slack of 3 mm to 5 mm when cutting the cable ties

lest they fall off the jumper because of temperature changes.

4.10.4 Connecting Jumpers Between the TMA and the Feeder

When the TMA is installed, install the jumper between the TMA and the feeder as follows:

Step 1 Connect the jumper with the feeder.

The bending radius must be 20 times longer than the jumper diameter.

Step 2 Bind the jumpers and label them.

Attach the label 100 mm away from the end of the jumper. Attach one label for each jumper,

because the jumper is usually very short.

----End

� Bind the cable ties in the same direction. Leave a slack of 3 mm to 5 mm when cutting the cable ties

in case that they fall off the jumper because of temperature changes.

� Encapsulate the connectors of the jumper and the feeder after the antenna system is installed and

tested. This is to facilitate replacing the feeders and jumpers.

� Make a waterproof curve for the jumper between the feeder and the TMA.

Figure 4-38 shows the installation of the jumper between the TMA and the feeder.





Figure 4-38 Jumper between the TMA and the feeder

1

2

3

4

(1) Feeder (2) Tower guardrails (3) Jumper (4) TMA

4.10.5 Laying and Fixing the Feeders

Layout Principles

Abide by the following principles when laying and fixing feeders:

� The minimum bending radius of the feeder should be 20 times longer than the feeder

diameter.

� Feeders should not cross each other when running along the cabling rack or down the

tower.

� Route the feeders from the top down. Put the feeders in order and fix them using fixing

clips while routing them.

� Mount the feeder fixing clips every 2 m or so along the tower or the cabling rack. Based

on the actual requirements, select the 1-for-3, 1-for-2, or 1-for-1fixing clip, as shown in

Figure 4-39, Figure 4-40, and Figure 4-41 respectively.




Figure 4-39 Fixing the feeders on the tower (using the 1-for-3 fixing clip)

Figure 4-40 Fixing the feeders on the tower (using the 1-for-2 fixing clip)





Figure 4-41 Laying the feeder from the tower top to the window

1

2

(1) Spacing between the feeder fixing clips (2) Feeder fixing clip

� Space feeder fixing clips regularly. Ensure that they face the same direction.

� When laying the feeders on the rooftop, place the feeders in the corresponding feeder

fixing clips according to the names on the feeder labels.




� Fasten the feeders after they are all laid neatly.

� The fixing clips are strictly perpendicular to the feeders.

� Feeders in the same clip are parallel to each other, as shown in Figure 4-42.

Figure 4-42 Feeders in the fixing clips

1

2

3

4

(1) Feeder (2) Cabling rack (3) Feeder fixing clip (4) Feeder well on the rooftop

Laying and Fixing Procedure


Step 1 Design the feeder arrangement and lead-in plan based on the sector requirements in the

engineering design document.

Arrange the feeders in the same sector in one column or row. Keep the arrangement sequences of the

feeders in each column or row consistent with each other.

Step 2 Arrange the feeders according to the designed sequence.

Step 3 Fix the feeders to the tower or the cabling rack while arranging them neatly. Meanwhile,

mount the feeder grounding clips and replace the temporary labels with formal metal labels.

Using a black cable tie, attach a metal label to a feeder at the following points:

� 200 mm away from the lower connector under the antenna

� 200 mm to 300 mm down the tower platform

� Bend portion

When attaching labels to the feeders, ensure that all the labels are neatly laid out. All the labels and cable

ties should face the same direction. Leave a slack of 5 mm to 10 mm when cutting the cable ties.

----End





Waterproofing and Encapsulating the Connectors

When the installation of the antenna system cannot be completed in one day, the connectors or

exposed ends of the feeders should go through simple waterproof treatment.

All the connectors should get the waterproof and capsulation treatment after the antenna

system is installed and tested.

4.10.6 Grounding the Feeders

Installation Locations of Feeder Grounding Clips

The feeder grounding clips are installed simultaneously with the feeder layout. Usually, each

feeder is grounded at three points.

When the antennas are installed on the tower, each feeder is grounded at:

� The point of the feeder within 1 m from the feeder connector

� The point of the feeder at the bottom of the tower

When antennas are installed on the rooftop, each feeder is grounded at:

� The point of the feeder within 1 m from the feeder connector

� The place where the feeder is to be led down from the rooftop

When the length of a feeder is more than 60 m, feeder grounding clips are applied along the

feeder. Usually, the grounding clips are mounted every 20 m.

Figure 4-43 and Figure 4-44 show the feeder grounding.




Figure 4-43 Lightning protection grounding of the feeder (for the antenna installed on the tower)

1

2

3

4

7

56

(1) Grounding at the top of the feeder

(2) Grounding in the middle of the feeder

(3) Grounding at the bottom of the feeder

(4) Feeder grounding point

(5) Part connecting to the lightning protection ground

(6) Grounding bar

(7) Tower grounding bar





Figure 4-44 Lightning protection grounding of the feeder down the cabling ladder

2

3

4

1

5

6

(1) Feeder (2) Rooftop (3) Feeder fixing clip

(4) Cabling rack (5) Grounding bar

(6) Lightning protection grounding cable

When installing the antenna on a support, ground the feeder to meet the requirements in the

following cases:

� If the feeder is shorter than 10 m, you do not need to ground the feeder.

� If the feeder is longer than or equal to 10 m, ground the feeder 0.5 m above the turning

where the feeder departs from the supports. The grounding cable led out from the feeder

is connected to the grounding point of the support.

� If the feeder is longer than or equal to 20 m, ground the feeder at the antenna bottom

(front end of the feeder) and at a distance 0.5 m above the turning where the feeder

departs from the supports. The grounding cable led out from the feeder is connected to

the grounding point of the support.




Installing the Feeder Grounding Clips


Step 1 Arrange for the tools, unpack the packing box of the feeder grounding clips, and collect all the

parts and accessories at a clean place or on a piece of paper.

Step 2 Determine the installation location of the feeder grounding clip.

Step 3 According to the clip size, strip the feeder skin at the determined location and expose the

outer conductor, as shown in 1, 2, and 3 of Figure 4-45.

Figure 4-45 Installing the feeder grounding clips

1 2 3

4 5 6

Step 4 Wrap the copper coat of the feeder grounding clip around the conductor of the feeder tightly.

Using the straight screwdriver to screw the fixing bar so that the grounding clip presses tightly

against the grounding cable of the feeder, as shown in 4, 5, and 6 of Figure 4-45.





Lead the grounding cable of the clip downward. The angle between the grounding cable and the feeder

should not be larger than 150. Ensure that the feeder grounding clip bends properly. The upper part of

Figure 4-46 shows the right direction of the grounding cable.

Figure 4-46 Right direction of the grounding cable of the feeder grounding clip

1

2

(1) Copper coat (2) Grounding cable

Step 5 Apply waterproof and encapsulation treatment to the grounding point. See section 4.14

"Waterproofing the Connectors" for details.

Step 6 Connect the grounding cable of the grounding clip to the grounding part of the cabling rack

securely.

Different operations are taken according to different installation positions, as shown in Table

4-3.

Table 4-3 Layout of feeders

Position Operation

If the tower is with grounding clips, connect the PGND cables to the

nearest steel plate, as shown in Figure 4-47.

On the tower

If the tower is without grounding clips, fix the base of the feeder fixing

clip to the tower and connect the PGND cable to the base.




Position Operation

On the cabling

rack

� Connect the PGND cable to the cabling rack with proper grounding.

� Remove the antirust print at the grounding point. Brush antirust paint

on the lug, nuts, and cabling rack after installation of PGND cable is

completed. The bare wire and stalk of the lug must be wrapped with

insulation tapes.

Figure 4-47 Connecting the grounding cable of the feeder grounding clip to the steel plate of the

tower

Step 7 Neatly lead the grounding cable of the feeder grounding clips to the grounding bar.

� If the grounding bar is not installed, install it and connect the grounding cable to the

grounding net of the equipment room.

� If no grounding bar is available, connect them to the well-grounded cabling rack or to the

lightning protection grounding net. If you use this method, the lightning protection

system may be affected. So avoid using it as far as possible.

Provide antirust treatment to both the grounding cable and the grounding connectors. Coat the lug, nut

and cabling racks with antirust paint. Wrap the bare wire and the lug handle with insulating tape.

----End

4.11 Installing Jumpers

The connectors of the 1/2-inch jumper and the 1/4-inch jumper inside the cabinet are usually

made on site.


The installation requirements for the jumpers are as follows:





� The 1/2-inch jumpers from the cabinet bottom to the cabling rack should be laid parallel

to each other.

� The 1/4-inch jumpers from the top to the bottom of the cabinet should be laid parallel to

each other.

� The jumpers near the connectors must be routed vertically for approximately 20 cm

before being bent; otherwise, the connectors are easily damaged.

� The jumpers should be bent in a natural manner and the bending radius should be 20

times longer than the jumper diameter.

� The jumpers between the cabinet top and the cabling rack should be laid with the

appropriate tightness.

� The jumpers and all the crossbars of the cabling rack should be bound together. Bind the

cable ties in the same direction and cut them smoothly without sharp ends.

� All the 1/2-inch jumpers should be labeled. The labels should be attached 100 mm away

from both ends of a jumper.

4.11.2 Installing the 1/4-Inch Jumpers

To install the 1/4-inch jumpers, do as follows:

Step 1 Cut the jumper to a proper length according to the actual distribution route.

Step 2 Connect one end of the 1/4-inch jumper to the ANT A or ANT B port on the DDPU and the

other end to the 1/2-inch jumper in the cabling hole at the cabinet bottom.

Step 3 Make the connectors (7/16 DIN) following the instructions delivered with the components.

For details of connecting the 1/4-inch jumper, see the BTS3012AE Base Station Cabinet Installation.

----End

4.11.3 Installing the 1/2-Inch Jumpers

To install the 1/2-inch jumpers, do as follows:

Step 1 Cut the jumper to a proper length according to the actual distribution route.

Step 2 Connect one end of the 1/2-inch jumper to the feeder and the other end to the 1/4-inch jumper

in the cabling hole at the cabinet bottom.

Step 3 Make the connectors (7/16 DIN) following the instructions delivered with the components.

Step 4 Attach the engineering labels.

----End

4.12 Installing the RET Antenna Components and Signal Cables

This section describes how to install the Remote Electrical Tilt Unit cable (RET) antenna

components and how to connect signal cables.

The RET antenna components are:




� Remote Control Unit (RCU)

� Smart Bias-Tee (SBT)

� Bias-Tee

There are two types of Bias-Tee:

� Bias-Tee without the RET antenna.

� Smart Bias-Tee, with the RET antenna.

4.12.1 Installing the Bias-Tee

Introduction to the Bias-Tee

The Bias-Tee must be installed when there is a TMA. It is directly screwed to ANT A and

ANT B ports on the DDPU to supply power to the TMA.

Figure 4-48 shows the Bias-Tee.

Figure 4-48 Bias-Tee

1

2

3

(1) 7/16 DIN female (2) SMA female (3) 7/16 DIN male

Installing the Bias-Tee


Step 1 Connect the 7/16 DIN male connector of the Bias-Tee to port ANT A or ANT B on the

DDPU through the 1/4-inch jumper.

Step 2 Screw one end of the 1/4-inch jumper to the 7/16 DIN female connector of the Bias-Tee.

Connect the other end of the 1/4-inch jumper to one end of the 1/2-inch jumper at the cabling

hole for RF jumpers.

Step 3 Fix the Bias-Tee.

Step 4 Connect the RET signal cable that connects the DATU to the SMA female connector.





----End

4.12.2 Installing the RCU

Introduction to the RCU

The RCU drives the RET antenna. On receiving the control signals from the BTS3012AE, the

RCU starts the step motor and adjusts the electrical downtilt angle of the antenna. The

maximum downtilt angle is 10o.

RS485 is the control interface of the RCU.

Figure 4-49 shows one type of RCU.

Figure 4-49 RCU

(1) Attachment nut (antenna interface)

(2) AISG standard male connector (8-pin interface), reserved for RET antenna connection

(3) AISG standard female connector (8-pin interface)

(4) AISG standard male connector

The RETs and the RCUs made by different manufacturers are not compatible with each other.

The RCU can be attached to the RET antenna after the antenna is installed.

Installing the RCU

The procedure for installing the RCU is as follows:

Step 1 Remove the protective cap from the port connecting the RET antenna, as shown in Figure

4-50.




Figure 4-50 Removing the protective cap

1

(1) Protective cap

If the RCU is not installed, you can adjust the downtilt angle using the adjustment wheel and adjustment

spindle, as shown in Figure 4-51. The scale of the lower edge of the wheel on the adjustment spindle is

the downtilt angle of the antenna, as shown in Figure 4-52.

Figure 4-51 Adjusting the downtilt angle

1

2

(1) Adjustment wheel (2) Adjustment spindle





Figure 4-52 Adjustment spindle

1

2

1

(1) Adjustment spindle (2) RCU

Step 2 Remove the black adjustment wheel, as shown in Figure 4-53.

Figure 4-53 Removing the black adjustment wheel

1

(1) Adjustment wheel

Step 3 Place the RCU carefully over the adjustment spindle and push it till the end, as shown in

Figure 4-54.




Do not twist the RCU. Otherwise, it may damage the adjustment spindle.

Figure 4-54 Installing the RCU

1

2

(1) RCU attachment nut (2) RCU

Step 4 Tighten the RCU attachment nut with a torque wrench.

----End

4.12.3 Installing the SBT

Introduction to the SBT

The SBT provides DC power and control signals for the RCU through an RF feeder cable. It

is mounted on the RET antenna port.

Figure 4-55 shows the two types of SBTs that Huawei equipment supports.





Figure 4-55 Smart Bias-Tee

(1) 7/16 DIN female connector (2) 7/16 DIN male connector

Installing the SBT

The procedure for installing the SBT is as follows:

Step 1 Screw the 7/16 DIN male connector of the SBT to one connector of the antenna, as shown in

Figure 4-56.

Figure 4-56 Installing the SBT

1

2

1

2

(1) Antenna connector (2) 7/16 DIN male connector

Step 2 Screw the antenna jumper connector to the 7/16 DIN female connector of the SBT, as shown

in Figure 4-57.




The jumper must be connected to the two antenna ports on the top of the Dual Duplexer Unit

for the DTRU BTS (DDPU).

Figure 4-57 Installing the SBT jumper

1

2

1

2

3

3

(1) 7/16 DIN female connector (2) Jumper (connecting SBT female connector)

(3) Jumper (connecting RET port)

----End

4.12.4 Connecting the AISG Control Cables to the RCU

Introduction to the AISG Control Cables

The two ends of the signal cable that connects the RCU and the SBT are:

� AISG standard male connector (8-pin interface)

� AISG standard female connector (8-pin interface)

The cable is 0.5 m long. Figure 4-58 shows the outline of the signal cable.

Figure 4-58 Signal cable between the RCU and the SBT

(2)(1) (3)

(1) AISG standard male connector (2) Label (3) AISG standard female connector





Installing the AISG Control Cables


Step 1 Connect the AISG standard male connector with the 8-pin connector of the SBT or the

STMA.

Step 2 Connect the AISG standard female connector with the 8-pin connector of the RCU, as shown

in Figure 4-59.

Figure 4-59 Installing the AISG control cables

1

1

2

3

3

2

(1) AISG standard male connector (2) AISG standard male connector (8-pin connector)

(3) AISG standard female connector

----End

4.13 Testing the Antenna System

Measure the antenna and feeder VSWR on the 1/4-inch jumpers using a radio analyzer.

Normally, the antenna VSWR is less than 1.5 (even if the system has the TMA).

The VSWR of the DIN male connector of the 1/4-inch jumper that connects to the DDPU is

less than 1.3. (The corresponding return loss is 18 dB.)

If the VSWR is greater than 1.5, infer that there are problems in the antenna system. In this

case, measure the VSWR hop by hop or measure the return loss of the entire system to locate

the problems.




4.14 Waterproofing the Connectors

After the installation and VSWR test of all the antenna system, the connectors of the antenna

jumpers and the TMA or antennas, and the connectors of the 1/2-inch jumpers and feeders or

feeder lightning arresters should be provided waterproof treatment.

Two types of waterproof tapes are required: PVC tape and waterproof insulation tape, as

shown in Figure 4-60.

Figure 4-60 PVC tape and waterproof insulation tape

1 2

(1) PVC tape (2) Waterproof insulation tape

The procedure of the waterproof and encapsulation treatment is as follows:

Step 1 Clean the feeder connectors or feeder grounding clamp.

Step 2 Stick the end of the waterproof insulation tape to the feeder at the point that is 20 mm to 50

mm from the connector or grounding clamp.

Step 3 Stretch the tape until it is three-fourths to half as wide as its original shape. Wrap up the

feeder spirally upward while maintaining this stretching strength. Ensure that the overlapping

area of the adjacent tape layers is half of the stretched width, as shown in Figure 4-61.

Ensure that the stretched width is at least half of the original width. Otherwise, over-stretching may

damage the molecular structure of the tape and reduce its reliability.

Figure 4-61 Wrapping up the feeder with waterproof insulation tape





Step 4 When wrapping the feeder at the point that is 20 mm to 50 mm from another connector or

grounding clamp, reverse the direction of the wrapping. When it reaches the starting point,

reverse the direction one more time. In this way, the feeder is wrapped up with three layers of

waterproof insulation tape.

Step 5 After wrapping, squeeze the tape until it sticks to the feeder to ensure that no air remains

between the tape layers.

Step 6 When the wrapping of the waterproof insulation tape is complete, wrap the feeder up with

PVC tapes to prevent the wearing out and aging of the waterproof insulation tape.

Step 7 The wrapping of the PVC tape is similar to that of the waterproof insulation tape. Start

wrapping spirally upward, while overlapping each adjacent layer over half the width of the

layer. Reverse the wrapping direction twice to make a three-layer cover. Be sure to maintain

the stretching strength.

----End


Antenna System Installation Manual 5 Checking the Installation


5 Checking the Installation About This Chapter


Title Description

5.1 Checking the Feeders Describes the checklist for the feeder installation.

5.2 Checking the Grounding

Bar

Describes the checklist for the grounding bar installation.

5.3 Checking the Antennas Describes the checklist for the antenna installation.

5.4 Checking the Jumpers and

the TMA

Describes the checklist for the installation of the jumpers

and the TMA.

5 Checking the Installation




5.1 Checking the Feeders

Table 5-1 lists the installation check items for the antenna system.

Table 5-1 Check items for the antenna system

No. Check Item

1 The feeders are arranged neatly.

2 In accordance with the standard requirements, the feeder and jumper labels are

attached neatly and oriented in the same direction.

3 The feeders are not broken or twisted. No copper skin is exposed.

4 The bending radius of the feeder is 20 times or even longer than the feeder diameter.

5 The installed feeder fixing clips are spaced evenly and oriented in the same

direction.

6 The feeders are straight for at least 0.5 m on both directions from the point where

they are led into the equipment room, and for 0.3 m on both sides of the lightning

protection frame.

7 The feeders do not cross each other. The degrees of their bending are the same.

8 � When the front of the cabinet is parallel to the cabling direction of the lead-in

feeders, the feeders in each sector are arranged in the same row. The arrangement

sequences of all the rows are the same.

� When the front of the cabinets is perpendicular to the cabling direction of the

lead-in feeders, the feeders in each sector are arranged in the same column. The

arrangement sequences of all the columns are the same.

9 The feeder connectors are prepared and fastened in a standard way.

10 The feeders are connected in the right way and arranged in the right sectors.

11 The feeders from the tower top to the equipment room are grounded:

� Within 1 m from the feeder connector

� On the feeder at the bottom of the tower

The grounded parts are securely bound. They are provided waterproof treatment.

12 The feeders from the rooftop to the BTSs are grounded at the following points:

� Within 1 m from the feeder connector

� At the point where the feeders are led down from the rooftop

If the length of the feeder distributed on the rooftop exceeds 20 m, a feeder

grounding clip is applied to the feeder on the rooftop.

The grounded parts are securely bound. They are provided waterproof treatment.

13 When the length of the feeder exceeds 60 m, the middle parts of the feeder are also

grounded by using lightning protection clips. The interval between two clips is 20

m.




No. Check Item

14 The grounding cables of the feeders are led from the top to the bottom. The angle

between the feeders and the corresponding grounding cables is less than 15°.

15 The terminals of the feeder grounding clips are fixed to the corresponding nearest

steel plates of the tower.

16 The antennas and feeders installed on the rooftop of a dedicated tower are grounded

to the lightning protection grounding net at the nearby building top.

17 The feeding is normal.

5.2 Checking the Grounding Bar

Table 5-2 lists the check items for the grounding bar of the BTS3012AE antenna system.

Table 5-2 Check items for the grounding bar of the BTS3012AE antenna system

SN Check Item

1 The grounding bar is isolated from the wall. The grounding cable is as short as

possible.

2 The grounding bar is connected to the underground grounding net through a reliable

special route.

3 The grounding bar is connected to the grounding bar or the ground. The grounding

resistance is less than 10 ohms.

5.3 Checking the Antennas

Table 5-3 lists the check items for the antennas of the BTS3012AE antenna system.

Table 5-3 Check items for the antennas of the BTS3012AE antenna system

Check Category

SN Check Item

1 The installation locations of the antennas are in compliance with the

design document.

2 The antenna lies within the protection coverage of the lightning rod

(a deviation of 30° downward from the top of the lightning rod).

Common

items

3 The antenna support is securely installed on the tower or on the

rooftop.

5 Checking the Installation




Check Category

SN Check Item

4 The top of the antenna sheathing is as high as or slightly higher than

the stand top.

5 The omnidirectional antennas stand upright with the error (if any)

less than !2°.

6 The distance of the antenna extending outside the tower platform is

no less than 2 m.

7 For the omnidirectional antenna installed on the building top, the

horizontal distance between the antenna and the antenna lightning rod

is at least 2.5 m.

8 The antenna isolation is 30 dB for both Tx-Tx and Tx-Rx antennas.

9 When two antennas are installed horizontally, the Tx-Tx/Tx-Rx

antenna horizontal spacing is at least 5 m.

10 When two antennas are installed vertically, the vertical spacing

between Tx-Tx and Tx-Rx antennas is at least 0.2 m.

11 According to the diversity Rx requirement of the omnidirectional

antenna, the Rx-Rx antenna horizontal spacing is at least 4 m.

Omnidirect

-ional

antenna

12 Omnidirectional Rx and Tx antennas can either share one antenna

stand or be installed separately, depending on the project design

drawing.

13 The error of the azimuth angle is not more than !5° and the error of

the pitch angle is not more than !0.5°.

14 The antennas are free from any interference of the tower structure in

the forward direction. The distance of the antenna extending outside

the tower platform is at least 1 m.

15 The antenna isolation is 30 dB for both Tx-Tx and Tx-Rx antennas.

16 The Tx-Tx/Tx-Rx antenna horizontal spacing in the same sector is at

least 3 m.

17 The Tx-Tx/Tx-Rx antenna horizontal spacing in different sectors is at

least 0.2 m.

18 For the vertical installation, the Tx-Tx/Tx-Rx antenna vertical

spacing in the same sector is at least 0.2 m.

Directional

antenna

19 When installing the directional antenna, the interval between the

space diversity receptions of the two Rx antennas is at least 4 m.




5.4 Checking the Jumpers and the TMA

Table 5-4 lists the check items for the jumpers and the TMA of the BTS3012AE antenna

system.

Table 5-4 Check items for the jumpers and the TMA of the BTS3012AE antenna system

SN Check Item

1 All the jumper connectors are waterproofed. Waterproof curves are made for the

jumpers.

2 The jumpers connected to the antennas are tied to the steel frame of the tower along

the crossbars of the antenna stand.

3 The strap that is used to tie the jumpers is left with a suitable length after being cut.

4 The bending radius of a jumper is no less than 20 times the jumper diameter.

5 The TMA is installed near the antenna.

6 For the TMA with connectors on different sides, the connector to the antenna is

extended upward and the connector to the feeder is extended downward. For the

TMA with connectors on the same side, both connectors are extended downward.

7 The grounding of the TMA is proper.