74247717 bts antenna system installation guide ret v300r009 01

BTSV300R009

Antenna System Installation Guide - RET

Issue 01Date 2009-11-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2009. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.comEmail: [email protected]

Issue 01 (2009-11-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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About This Document

PurposeYou can start installing devices of the RET antenna system after the site preparation is complete.These devices and the base station can be installed simultaneously.This document describes how to install the RET antenna system (consisting of the RET antenna,feeders, jumpers, RCU, STMA, SBT, and BT) and provides checklists for the hardwareinstallation.

VersionThe following table lists the product version related to this document.

Product Name Product VersionGBTS All GBTS Versions

Intended AudienceThis document is intended for:l GBTS installers

Organization1 Changes in BTS Antenna System Installation Guide (RET)This provides the changes in the BTS Antenna System Installation Guide (RET).2 Typical RET Antenna SystemThe typical RET antenna system is an independent antenna system that does not share antennasand feeders with other systems.3 Typical Antenna System Shared Between 2G and 3G Base Stations

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The antenna system shared between the 2G and 3G base stations means that the 2G base stationand the 3G base station share the same antenna or feeders. The two typical scenarios for theshared antenna system are: shared RET antenna + independent feeders and independent RETantennas + shared feeders.4 Introduction to RET Antenna Line DevicesThe RET antenna line devices consist of RET antennas, feeders, jumpers, RCUs, SBTs,STMAs, AISG control cables, BTs, and splitters.5 Control of RET AntennasHuawei base station integrates the functions of controlling RET antennas. It manages the STMAand RCU as internal components. Huawei GSM base station configured with the BT can controlRET antennas.6 Antenna System Installation PreparationsBefore installing the antenna system, you must keep the necessary tools and instruments, andthe feeder window ready.7 Procedure for Installing the GSM RET Antenna SystemThis part describes how to install the GSM RET antenna system, which consists of the antenna,feeders, and ALDs.8 Installing the Grounding BarUsed for surge protection, the grounding bar should be installed near the cabinet or on therainproof wall of the cable draw pit on the rooftop. In practice, the grounding bar should beinstalled according to the engineering design.9 Installing Antenna SupportsThis part describes the procedure for installing the antenna support on a tower and the precautionsfor the installation.10 Assembling AntennasBefore installing an antenna on a tower, you need to assemble the antenna. The antenna to beassembled can be an omnidirectional antenna or a directional antenna.11 Hoisting AntennasThis part describes how to hoist antennas to the top of the tower.12 Installing AntennasThis part describes how to install antennas on the tower platform and on the rooftop.13 Installing the SplittersSplitters should be installed if multiple antennas are used in one sector in the case of split sectors.Splitters are installed between base stations and antennas using jumpers.14 Installing RET Antenna Line DevicesThe antenna line devices are the RCU, RRU3801C AISG multi-core cable, RRU3801C AISGextension cable, SBT, STMA, and AISG control cable.15 Installing Feeders

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The feeder installation procedure includes routing feeders, installing feeder grounding kits, andleading feeders into the equipment room.16 Installing the Jumpers Between the Feeders and the CabinetJumpers are required for the connection between the feeders and the base station. The connectionmethods for jumpers and ports vary according to the base station equipment. For details, referto the installation manual of related base station equipment.17 Testing the Antenna SystemThis part describes how to test the VSWR of the antenna after the antenna system is installed.18 Installing Color Rings for the Antenna SystemThis describes how to install color rings for the antenna system.19 Sealing Feeder JointsFeeders are exposed to air. Thus, the feeder joints must be sealed to ensure stable performance.Similarly, the feeder grounding clips must be sealed.20 Waterproofing the Feeder WindowThe feeder window are categorized into encapsulation window and glass window. You shouldwaterproof the feeder window based on its type.21 Checking the Installation of the RET Antenna SystemAfter the RET antenna system is installed, you must check the installation.

ConventionsSymbol ConventionsThe symbols that may be found in this document are defined as follows.

Symbol DescriptionIndicates a hazard with a high level of risk, which if notavoided,will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if notavoided,could result in equipment damage, data loss,performance degradation, or unexpected results.Indicates a tip that may help you solve a problem or savetime.Provides additional information to emphasize or supplementimportant points of the main text.

General Conventions

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The general conventions that may be found in this document are defined as follows.

Convention DescriptionTimes New Roman Normal paragraphs are in Times New Roman.Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.Italic Book titles are in italics.Courier New Examples of information displayed on the screen are in

Courier New.

Command ConventionsThe command conventions that may be found in this document are defined as follows.

Convention DescriptionBoldface The keywords of a command line are in boldface.Italic Command arguments are in italics.[ ] Items (keywords or arguments) in brackets [ ] are optional.{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.[ x | y | ... ] Optional items are grouped in brackets and separated by

vertical bars. One item is selected or no item is selected.{ x | y | ... }* Optional items are grouped in braces and separated by

vertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

GUI ConventionsThe GUI conventions that may be found in this document are defined as follows.

Convention DescriptionBoldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK.> Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder.

Keyboard Operations

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The keyboard operations that may be found in this document are defined as follows.

Format DescriptionKey Press the key. For example, press Enter and press Tab.Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently.Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means

the two keys should be pressed in turn.

Mouse OperationsThe mouse operations that may be found in this document are defined as follows.

Action DescriptionClick Select and release the primary mouse button without moving

the pointer.Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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Contents

About This Document...................................................................................................................iii1 Changes in BTS Antenna System Installation Guide (RET).............................................1-12 Typical RET Antenna System..................................................................................................2-1

2.1 Cabinet + BT + RET Antenna + RCU + SBT.................................................................................................2-22.2 Cabinet + BT + Cascaded RET Antenna + RCU + SBT................................................................................ 2-3

3 Typical Antenna System Shared Between 2G and 3G Base Stations..............................3-13.1 Shared RET Antenna; Independent Feeders................................................................................................... 3-23.2 Independent RET Antennas; Shared Feeders..................................................................................................3-33.3 Shared Cascaded RET Antennas; Independent Feeders..................................................................................3-53.4 Shared Cascaded RET Antennas; Shared Feeders..........................................................................................3-7

4 Introduction to RET Antenna Line Devices..........................................................................4-14.1 RET Antennas.................................................................................................................................................4-24.2 Feeders and Jumpers....................................................................................................................................... 4-24.3 RCUs...............................................................................................................................................................4-54.4 SBTs................................................................................................................................................................4-64.5 AISG Control Cable........................................................................................................................................4-74.6 Non-RET BT.................................................................................................................................................4-104.7 Splitters..........................................................................................................................................................4-10

5 Control of RET Antennas.........................................................................................................5-15.1 Control of Macro Base Station RET Antennas...............................................................................................5-2

6 Antenna System Installation Preparations...........................................................................6-16.1 Spacing Requirements for GSM Antenna Installation....................................................................................6-3

7 Procedure for Installing the GSM RET Antenna System...................................................7-18 Installing the Grounding Bar...................................................................................................8-19 Installing Antenna Supports....................................................................................................9-1

9.1 Installing the Antenna Support on the Tower................................................................................................. 9-29.2 Installing the Antenna Support on the Rooftop...............................................................................................9-5

10 Assembling Antennas...........................................................................................................10-110.1 Assembling Omni-directional Antennas.....................................................................................................10-2

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10.2 Assembling Directional Antenna................................................................................................................10-311 Hoisting Antennas.................................................................................................................11-112 Installing Antennas...............................................................................................................12-1

12.1 Installing an Omnidirectional Antenna on the Tower Platform..................................................................12-212.2 Installing a Directional Antenna on the Tower Platform............................................................................12-412.3 Installing an Omni-Directional Antenna on the Rooftop............................................................................12-712.4 Installing a Directional Antenna on the Rooftop......................................................................................12-10

13 Installing the Splitters...........................................................................................................13-113.1 Installing the Splitters on the Antenna Side................................................................................................13-213.2 Installing the Splitters on the Base Station Side.........................................................................................13-3

14 Installing RET Antenna Line Devices................................................................................14-114.1 Installing the RCU.......................................................................................................................................14-214.2 Installing the AISG Extension Cable of the RRU3801C............................................................................14-514.3 Installing the SBT........................................................................................................................................14-5

15 Installing Feeders...................................................................................................................15-115.1 Routing Feeders...........................................................................................................................................15-215.2 Installing Feeder Grounding Kits................................................................................................................15-8

15.2.1 Location Requirements for Grounding the Feeder of the Mini Base Station...................................15-1015.2.2 Location Requirements for Grounding the Feeder of the Macro Base Station................................15-14

15.3 Leading Feeders into the Equipment Room..............................................................................................15-1716 Installing the Jumpers Between the Feeders and the Cabinet......................................16-117 Testing the Antenna System................................................................................................17-118 Installing Color Rings for the Antenna System...............................................................18-119 Sealing Feeder Joints.............................................................................................................19-120 Waterproofing the Feeder Window....................................................................................20-121 Checking the Installation of the RET Antenna System..................................................21-1

21.1 Checklist for Antenna Installation...............................................................................................................21-221.2 Checklist for Feeder Installation.................................................................................................................21-321.3 Checklist for Jumper Installation................................................................................................................21-421.4 Checklist for Grounding Bar Installation....................................................................................................21-421.5 Checklist for Feeder Window Installation..................................................................................................21-421.6 Checklist for RET ALD Installation...........................................................................................................21-421.7 Checklist for Field Cleanliness of the Antenna System..............................................................................21-5

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Figures

Figure 2-1 Configuration of cabinet + BT + RET antenna + RCU + SBT..........................................................2-3Figure 2-2 Configuration of cabinet + BT + cascaded RET antenna + RCU + SBT...........................................2-4Figure 3-1 Shared RET antenna and RCU between the DBS3800 and the 2G base station (independent feeders)...............................................................................................................................................................................3-2Figure 3-2 Shared RET antenna and RCU between the BTS3812E and the 2G base station (independent feeders)...............................................................................................................................................................................3-3Figure 3-3 Feeders shared between the 20 W RRU3801C and the 2G base station (independent RET antennas)...............................................................................................................................................................................3-4Figure 3-4 Feeders shared between the BTS3812E and the 2G base station (independent RET antennas)........ 3-5Figure 3-5 Cascaded RET antenna shared between the DBS3800 and the 2G base station (independent feeders)...............................................................................................................................................................................3-6Figure 3-6 Cascaded RET antenna shared between the BTS3812E and the 2G base station (independent feeders)...............................................................................................................................................................................3-7Figure 3-7 Cascaded RET antenna and feeders shared between the 20 W RRU3801C and the 2G base station...............................................................................................................................................................................3-8Figure 3-8 Cascaded RET antenna and feeders shared between the BTS3812E and the 2G base station...........3-9Figure 4-1 Cable connection in the antenna system.............................................................................................4-3Figure 4-2 Kathrein RCU and Powerwave RCU................................................................................................. 4-6Figure 4-3 Kathrein SBT and Powerwave SBT...................................................................................................4-7Figure 4-4 0.5-m-long [1.64-foot-long] AISG control cable............................................................................... 4-8Figure 4-5 2-m-long [6.56-foot-long] AISG control cable.................................................................................. 4-9Figure 4-6 15-m-long [49.21-foot-long] AISG control cable.............................................................................. 4-9Figure 4-7 BT.....................................................................................................................................................4-10Figure 4-8 1-for-3 Kathrein splitter....................................................................................................................4-11Figure 5-1 SBT + RCU........................................................................................................................................ 5-2Figure 5-2 STMA + RCU.....................................................................................................................................5-3Figure 5-3 SBT + RCU........................................................................................................................................ 5-4Figure 8-1 Indoor grounding bar..........................................................................................................................8-1Figure 8-2 Installing a grounding bar on the wall................................................................................................8-2Figure 8-3 Grounding bar used before the feeder is led into the equipment room.............................................. 8-2Figure 9-1 Structure of the antenna support on the tower platform.....................................................................9-2Figure 9-2 Protection coverage of the lightning arrester......................................................................................9-3Figure 9-3 Hoisting the antenna support or the antenna.......................................................................................9-4Figure 9-4 Installing the antenna support on the tower platform.........................................................................9-5Figure 9-5 Structure of the antenna support on the rooftop................................................................................. 9-6

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Figure 9-6 Protection coverage of the lightning rod............................................................................................9-7Figure 10-1 Fixing clip of the omni-directional antenna....................................................................................10-2Figure 10-2 Assembling fixing clips for the omnidirectional antenna...............................................................10-3Figure 10-3 Fixing clip for the directional antenna............................................................................................10-4Figure 10-4 Directional antenna corresponding to the pitch angle and installation hole...................................10-5Figure 10-5 Angle display before adjusting the pitch angle of the antenna.......................................................10-5Figure 10-6 Angle display after adjusting the pitch angle of the antenna..........................................................10-6Figure 10-7 Adjusting gear and pitch angle scale axis.......................................................................................10-6Figure 11-1 Hoisting the antenna support or the antenna...................................................................................11-2Figure 12-1 Omnidirectional antenna installed on the tower platform..............................................................12-3Figure 12-2 Relation between the azimuth of directional antenna and the sector..............................................12-5Figure 12-3 Angle display before adjusting of the pitch angle of the antenna...................................................12-5Figure 12-4 Angle display after adjusting the pitch angle of the antenna..........................................................12-6Figure 12-5 Directional antenna on the tower platform.....................................................................................12-7Figure 12-6 Omni-directional antenna installed on the rooftop.........................................................................12-9Figure 12-7 Relation between the azimuth of directional antenna and the sector............................................12-11Figure 12-8 Directional antenna corresponding to the pitch angle and installation hole.................................12-12Figure 12-9 Angle display before the adjustment of antenna pitch angle........................................................12-12Figure 12-10 Angle display after adjusting the pitch angle of the antenna......................................................12-13Figure 12-11 Adjusting RET antenna pitch angle............................................................................................12-13Figure 12-12 Installing directional antenna on rooftop (without parapet, with TMA)....................................12-15Figure 12-13 Installing directional antenna on rooftop (with TMA and wall higher than 1200 mm).............12-16Figure 13-1 1-for-3 splitter installed on the antenna side...................................................................................13-3Figure 13-2 1-for-3 splitter installed on the base station side............................................................................13-5Figure 14-1 Removing the protective cap..........................................................................................................14-2Figure 14-2 Adjusting gear and spindle.............................................................................................................14-3Figure 14-3 Adjusting spindle............................................................................................................................14-3Figure 14-4 Removing the adjusting gear..........................................................................................................14-4Figure 14-5 Installing the RCU..........................................................................................................................14-4Figure 14-6 Installing the SBT...........................................................................................................................14-5Figure 14-7 Installing the SBT jumper...............................................................................................................14-6Figure 15-1 one-for-one feeder clip...................................................................................................................15-2Figure 15-2 one-for-three feeder clip.................................................................................................................15-2Figure 15-3 Protection treatment for the feeder connector (unit: mm)..............................................................15-4Figure 15-4 Laying out the feeder from the tower top to the window...............................................................15-6Figure 15-5 Laying out the feeder from the rooftop to the window...................................................................15-7Figure 15-6 Installing the feeder grounding kits (a)...........................................................................................15-8Figure 15-7 Installing the feeder grounding kits (b)..........................................................................................15-8Figure 15-8 Grounding before leading the feeders into the equipment room (with grounding bar)..................15-9Figure 15-9 Grounding before leading the feeder into the equipment room (without grounding bar)............15-10Figure 15-10 Grounding locations of the feeder when the base station and the antenna are installed on the samepole....................................................................................................................................................................15-11

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Figure 15-11 Grounding locations of the feeder when the base station and the antenna are installed on differentpoles..................................................................................................................................................................15-12Figure 15-12 Grounding locations of the feeder when the base station is installed on a tower.......................15-13Figure 15-13 Grounding locations of the feeder when the base station is installed indoors............................15-13Figure 15-14 Grounding locations of the feeder when the RF antenna is installed on a tower platform.........15-15Figure 15-15 Grounding locations of the feeder when the RF antenna is installed on the rooftop..................15-16Figure 15-16 Routing the feeders through the feeder window.........................................................................15-17Figure 18-1 Color rings attached for a tower-mounted base station..................................................................18-2Figure 18-2 Attaching color rings......................................................................................................................18-3Figure 19-1 PVC insulating tape and waterproof tape.......................................................................................19-1Figure 19-2 Wrapping with three layers of waterproof tape .............................................................................19-2Figure 19-3 Tightly pressing the waterproof tape..............................................................................................19-2Figure 19-4 Wrapping with three layers of PVC insulating tape.......................................................................19-3Figure 19-5 Tightly pressing the PVC insulating tape.......................................................................................19-3Figure 19-6 Sealed cable....................................................................................................................................19-4Figure 20-1 Waterproofed feeder window.........................................................................................................20-1

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Tables

Table 4-1 Feeder types and cabling distances......................................................................................................4-4Table 4-2 Design principles of the feeder length for Type A projects.................................................................4-4Table 4-3 Design principles of the feeder length for Type B projects.................................................................4-5Table 4-4 Relation between the BT quantity and the antenna system components...........................................4-10Table 6-1 Tools and instruments for the antenna system installation..................................................................6-1Table 6-2 Spacing requirements for omnidirectional antenna installation...........................................................6-3Table 6-3 Spacing requirements for directional antenna installation...................................................................6-4Table 14-1 Connection between the NodeB and the jumper..............................................................................14-6

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1 Changes in BTS Antenna SystemInstallation Guide (RET)

This provides the changes in the BTS Antenna System Installation Guide (RET).

01(2009-11-30) of V300R009This is the initial commercial release.

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2 Typical RET Antenna SystemAbout This Chapter

The typical RET antenna system is an independent antenna system that does not share antennasand feeders with other systems.

2.1 Cabinet + BT + RET Antenna + RCU + SBTIn this typical configuration, the antenna system consists of the RET antenna, BT, SBT, RCU,and feeders. The AISG port on the SBT is connected to the RCU through an AISG control cable.2.2 Cabinet + BT + Cascaded RET Antenna + RCU + SBTIn this typical configuration, the antenna system consists of the cascaded RET antenna, BT, SBT,RCU, and feeders. The AISG port on the SBT is connected to the RCU through an AISG controlcable.

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2.1 Cabinet + BT + RET Antenna + RCU + SBTIn this typical configuration, the antenna system consists of the RET antenna, BT, SBT, RCU,and feeders. The AISG port on the SBT is connected to the RCU through an AISG control cable.

NOTE

The common BT transmits DC signal and RF signal, and the OOK BT transmits DC signal, RF signal, andOOK signal. For the RET antenna system, the OOK BT must be used.Splitters should be installed if multiple antennas are used in one sector in the case of split sectors. Fordetails about the installation of splitters, refer to Installing the Splitters. Splitters are installed betweenbase stations and antennas using jumpers.

The RET antenna can be controlled through the Huawei OMC or the LMT. The OMC or theLMT sends the control signals to the base station. The base station converts the control signalsinto OOK signals, and then transfers the OOK signals and DC power to the BT. Then, the BTcouples the OOK signals and DC power into the internal conductor of Feeder 1.After the OOK signals and DC power enters the SBT, the DC power is transferred to the RCUthrough the control cable between the SBT and the RCU. In the SBT, the OOK signals aredemodulated and converted into RS485 signals. Then, the RS485 signals are sent to the RCU.After the RCU receives the RS485 signals, it runs the command as specified in the signals.Figure 2-1 shows the configuration of cabinet + BT + RET antenna + RCU + SBT.

2 Typical RET Antenna SystemBTS


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Figure 2-1 Configuration of cabinet + BT + RET antenna + RCU + SBT

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2.2 Cabinet + BT + Cascaded RET Antenna + RCU + SBTIn this typical configuration, the antenna system consists of the cascaded RET antenna, BT, SBT,RCU, and feeders. The AISG port on the SBT is connected to the RCU through an AISG controlcable.

NOTEThe common BT transmits DC signal and RF signal, and the OOK BT transmits DC signal, RF signal, andOOK signal. For the RET antenna system, the OOK BT must be used.Splitters should be installed if sectors are split. For details about the installation of splitters, refer toInstalling the Splitters. Splitters are installed between base stations and antennas using jumpers.

The RET antenna can be controlled through the Huawei OMC or the LMT. The OMC or theLMT sends the control signals to the base station. The base station converts the control signals

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into OOK signals, and then transfers the OOK signals and DC power to the BT. Then, the BTcouples the OOK signals and DC power into the internal conductor of Feeder 1.After the OOK signals and DC power enters the SBT, the DC power is transferred to the RCUthrough the control cable between the SBT and the RCU. In the SBT, the OOK signals aredemodulated and converted into RS485 signals. Then, the RS485 signals are sent to the RCU.After the RCU receives the RS485 signals, it runs the command as specified in the signals.Cascaded RCUs can be used when the antennas for three sectors are installed on the same poleor tower and within a short distance of each other.Figure 2-2 shows the configuration of cabinet + BT + cascaded RET antenna + RCU + SBT.

Figure 2-2 Configuration of cabinet + BT + cascaded RET antenna + RCU + SBT

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3 Typical Antenna System Shared Between 2Gand 3G Base Stations

About This Chapter

The antenna system shared between the 2G and 3G base stations means that the 2G base stationand the 3G base station share the same antenna or feeders. The two typical scenarios for theshared antenna system are: shared RET antenna + independent feeders and independent RETantennas + shared feeders.

3.1 Shared RET Antenna; Independent FeedersThe 3G and 2G base stations can share an RET antenna but must have their own feeders. In thistypical configuration, the antenna system consists of the RET antenna, RCU, and feeders.3.2 Independent RET Antennas; Shared FeedersThe 3G and 2G base stations can share feeders but must have their own RET antennas. In thisconfiguration, the parts of the antenna system differ according to the type of the 3G base station.3.3 Shared Cascaded RET Antennas; Independent FeedersThe 3G and 2G base stations can share cascaded RET antennas but must have their own feeders.The antenna system consists of the RET antenna, RCU, SBT, and feeders. Interconnectionbetween RCUs enables the 3G base station to control the antenna of the 2G base station.3.4 Shared Cascaded RET Antennas; Shared FeedersThe 3G and 2G base stations can share the cascaded RET antenna and feeders. The antennasystem consists of the RET antenna, RCU, SBT, and feeders. Interconnection between RCUsenables the 3G base station to control the antenna of the 2G base station.

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3.1 Shared RET Antenna; Independent FeedersThe 3G and 2G base stations can share an RET antenna but must have their own feeders. In thistypical configuration, the antenna system consists of the RET antenna, RCU, and feeders.Figure 3-1 shows the antenna system (independent feeders) shared between the 20 WRRU3801C and the 2G base station. Figure 3-2 shows the antenna system (independent feeders)shared between the BTS3812E and the 2G base station.

Figure 3-1 Shared RET antenna and RCU between the DBS3800 and the 2G base station(independent feeders)

In this configuration:l Generally, the RRU3801C is installed near the antenna. For example, both the RRU3801C

and the antenna are installed at the top of the building.l Typically, the RRU3801C is connected to the antenna through 1/2" jumpers. In some cases,

the RRU3801C is connected to the antenna through a 5/4" feeder and two 1/2" jumpers ora 7/8" feeder and two 1/2" jumpers.

l The RRU3801C is connected to the RCU through an AISG multi-core cable.NOTE

In this configuration, the 20 W RRU3801C and the 40 W RRU3801C are installed in the same way.




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Figure 3-2 Shared RET antenna and RCU between the BTS3812E and the 2G base station(independent feeders)

NOTE

l The BTS3812A and the BTS3812E can be installed in the same way.l The AISG port on the SBT is connected to the RCU through an AISG control cable.

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3.2 Independent RET Antennas; Shared FeedersThe 3G and 2G base stations can share feeders but must have their own RET antennas. In thisconfiguration, the parts of the antenna system differ according to the type of the 3G base station.

CAUTIONIf the 3G and 2G base stations share feeders and the 2G base station uses the antenna surgeprotector, the surge protector must be installed between the duplexer and the 2G base station.This prevents the surge protector from being short-circuited with the ground and thus avoid shortcircuit of RET control signals and DC signals on the 3G base station.




3-3

Figure 3-3 shows the feeders (independent RET antennas) shared between the 20 W RRU3801Cand the 2G base station. Figure 3-4 shows the feeders (independent RET antennas) sharedbetween the BTS3812E and the 2G base station.

NOTE

The common BT transmits DC signal and RF signal, and the OOK BT transmits DC signal, RF signal, andOOK signal. For the RET antenna system, the OOK BT must be used.

Figure 3-3 Feeders shared between the 20 W RRU3801C and the 2G base station (independentRET antennas)

NOTE

l The BT and the SBT should be connected on the same feeder to the ANT_TX/RXA port at the bottomof the RRU3801C. The AISG port on the SBT is connected to the RCU through an AISG controlcable.

l For the 40 W RRU3801C, the BT or the AISG coaxial cable is not required because the BT isintegrated into the RRU3801C.




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Figure 3-4 Feeders shared between the BTS3812E and the 2G base station (independent RETantennas)

NOTE

l The BTS3812A and the BTS3812E can be installed in the same way.l The AISG port on the SBT is connected to the RCU through an AISG control cable.

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3.3 Shared Cascaded RET Antennas; Independent FeedersThe 3G and 2G base stations can share cascaded RET antennas but must have their own feeders.The antenna system consists of the RET antenna, RCU, SBT, and feeders. Interconnectionbetween RCUs enables the 3G base station to control the antenna of the 2G base station.Figure 3-5 shows the antenna system shared (shared cascaded RET antennas; independentfeeders) between the DBS3800 and the 2G base station. Figure 3-6 shows the antenna system(shared cascaded RET antennas; independent feeders) shared between the BTS3812E and the2G base station.




3-5

Figure 3-5 Cascaded RET antenna shared between the DBS3800 and the 2G base station(independent feeders)

In this configuration:l Generally, the RRU3801C is installed near the antenna. For example, both the RRU3801C

and the antenna are installed at the top of the building.l Typically, the RRU3801C is connected to the antenna through 1/2" jumpers. In some cases,

the RRU3801C is connected to the antenna through a 5/4" feeder and two 1/2" jumpers ora 7/8" feeder and two 1/2" jumpers.

l The RRU3801C is connected to the RCU through an AISG multi-core cable.l The RCU on the 2G base station is connected to the RCU on the RRU3801C through an

AISG control cable.NOTE

In this configuration, the 20 W RRU3801C and the 40 W RRU3801C are installed in the same way.




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Figure 3-6 Cascaded RET antenna shared between the BTS3812E and the 2G base station(independent feeders)

NOTE

l The RCU on the 2G base station is connected to the RCU on the BTS3812E through an AISG controlcable.

l The BTS3812A and the BTS3812E can be installed in the same way.

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3.4 Shared Cascaded RET Antennas; Shared FeedersThe 3G and 2G base stations can share the cascaded RET antenna and feeders. The antennasystem consists of the RET antenna, RCU, SBT, and feeders. Interconnection between RCUsenables the 3G base station to control the antenna of the 2G base station.




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CAUTIONIf the 3G and 2G base stations share feeders and the 2G base station uses the antenna surgeprotector, the surge protector must be installed between the duplexer and the 2G base station.This prevents the surge protector from being short-circuited with the ground and thus avoid shortcircuit of RET control signals and DC signals on the 3G base station.

Figure 3-7 shows the cascaded RET antenna and feeders shared between the 20 W RRU3801Cand the 2G base station. Figure 3-8 shows the cascaded RET antenna and feeders shared betweenthe BTS3812E and the 2G base station.

Figure 3-7 Cascaded RET antenna and feeders shared between the 20 W RRU3801C and the2G base station




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NOTE

l The BT and the SBT should be connected on the same feeder to the ANT_TX/RXA port at the bottomof the RRU3801C. The AISG port on the SBT is connected to the RCU through an AISG controlcable.

l For the 40 W RRU3801C, the BT or the AISG coaxial cable is not required because the BT isintegrated into the RRU3801C.

l The AISG port on the SBT is connected to the RCU through an AISG control cable.l The RCU on the 2G base station is connected to the RCU on the RRU3801C through an AISG control

cable.

Figure 3-8 Cascaded RET antenna and feeders shared between the BTS3812E and the 2G basestation




3-9

NOTE

l The AISG port on the SBT is connected to the RCU through an AISG control cable.l The RCU on the 2G base station is connected to the RCU on the BTS3812E through an AISG control

cable.l The BTS3812A and the BTS3812E can be installed in the same way.

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4 Introduction to RET Antenna Line DevicesAbout This Chapter

The RET antenna line devices consist of RET antennas, feeders, jumpers, RCUs, SBTs,STMAs, AISG control cables, BTs, and splitters.

4.1 RET AntennasWith the phase shifter that can be adjusted mechanically, the tilt of RET antennas can be adjustedconstantly.4.2 Feeders and JumpersThe feeders and jumpers are used to connect the antenna to the base station. They are of threetypes: 1/2" jumper, 7/8" feeder, and 5/4" feeder.4.3 RCUsReceiving control signals sent from the NodeB, the Remote Control Unit (RCU) starts the stepmotor and adjusts the tilt of the antenna by controlling the phase shifter through the drive system.The RCU has a control port, that is, an RS485 port.4.4 SBTsThe Smart Bias-Tee (SBT) provides DC power and control signals for the RCU through a feeder.The SBT is mounted on the side of the RET antenna.4.5 AISG Control CableThe AISG control cable is a signal cable between the RCU and the SBT (or STMA). The cableconnected to the SBT is 0.5 m long. The cable connected to the STMA is 2 m long.4.6 Non-RET BTThe BT is a passive component to couple the DC power or OOK signals into a feeder.4.7 SplittersThe splitter splits sectors. It can split the RF signals, RET control signals, and DC signals thatare sent from the base station into multiple paths and then transmit them to devices of the antennasystem in the corresponding sectors.

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BTSAntenna System Installation Guide - RET 4 Introduction to RET Antenna Line Devices


4-1

4.1 RET AntennasWith the phase shifter that can be adjusted mechanically, the tilt of RET antennas can be adjustedconstantly.

Working Principles of RET AntennasWith the Remote Control Unit (RCU), RET antennas can be controlled remotely.The RCU consists of a step motor, a control board, and a drive system.l The step motor is usually controlled digitally.l The control board receives command from the NodeB and drives the step motor.l The drive system has a gear that bites the pulling bar. When the gear is driven by the step

motor, the gear pulls the pulling bar to change the tilt.

Benefits and Limits of RET AntennasBenefits:l The operator can remotely and quickly handle multiple stations. The costs of network

optimization and maintenance are saved.l The operation is not affected by bad weather.l The trouble for visiting some sites that need prior consent is avoided, for example, the site

that is located inside the important government institute.l In case the tilt is large, the signals do not distort, and the interference to the neighboring

cell is insignificant.Limits:l The RET antenna system is complicated with lower reliability than that of the mechanical

tilt.l The cost of the RET antenna system is relatively high.

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4.2 Feeders and JumpersThe feeders and jumpers are used to connect the antenna to the base station. They are of threetypes: 1/2" jumper, 7/8" feeder, and 5/4" feeder.l The jumper is supple but has a high loss. It is used in short-distance cabling between the

TMA and the antenna and between the TMA and the feeder.l The feeder is rigid but has a low loss. It is used in long-distance cabling.Figure 4-1 shows the locations of the feeder and jumpers in the antenna system of a base station.

4 Introduction to RET Antenna Line DevicesBTS



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Figure 4-1 Cable connection in the antenna system

(1) Antenna (2) Jumper (3) TMA(4) Feeder (5) Cabinet

l Jumper

The jumpers are installed between the antenna and the TMA, between the TMA and thefeeder, between the feeder and the base station, or between the BT and the base station.Most jumpers have a predefined length. Only the jumper between the feeder and the basestation or between the BT and the base station needs to be shortened and installed withconnectors on the site.

If... Then...The jumper is located between theantenna and the TMA,

Its predefined length is 2.5 m [8.20 ft].

The jumper is located between the TMAand the feeder,

Its predefined length is 1.5m [4.92 ft].

If the distance between the antenna and the base station is shorter than 14 m [45.92 ft], youmay use the jumper to connect the antenna and the base station.In this case, the antenna and the base station can be connected by the 1/2" jumper.

l FeederThere are two types of feeders: 7/8" and 5/4". The feeder type depends on the distancebetween the antenna and the base station.



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Table 4-1 Feeder types and cabling distancesMacro basestation

Frequency band(MHz)

7/8" feeder 5/4" feeder

GSM 900 Equal to or shorterthan 80 m [262.46 ft]

Longer than 80 m[262.46 ft]

1800 Equal to or shorterthan 50 m [164.04 ft]


CDMA 450 Equal to or shorterthan 110 m [360.89ft]






UMTS 1900/2100 Equal to or shorterthan 50 m [164.04 ft]


CAUTIONIf a two-port dipole antenna is shared by two frequency bands, select the feeder type thatrequires a shorter cabling distance.

Based on the acquisition of the base station information, all projects are classified into twotypes: Type A: The network planning has been performed for the project. Table 4-2 shows

the design principles of the feeder length for Type A projects. Type B: The network planning has not been performed for the project. Table 4-3 shows

the design principles of the feeder length for Type B projects.

Table 4-2 Design principles of the feeder length for Type A projectsTower Base station Average

distancebetween thetower/pole andthe cabinet

Length of a singlefeeder

Tower or pole at thetop of a roof

Outdoor base station 10 m Height of the tower orpole at the top of theroof + 10 m

Indoor base station 25 m Height of the tower orpole at the top of theroof + 25m




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Tower Base station Averagedistancebetween thetower/pole andthe cabinet

Length of a singlefeeder

Tower on the ground Outdoor base station 8 m Height of the antenna +8 m

Indoor base station 12 m Height of the antenna +12 m

Unknown Unknown Unconfirmed Height of the antenna +10 m

Table 4-3 Design principles of the feeder length for Type B projectsMacro base station Frequency band

(MHz)Length of asingle feeder

Feeder

GSM 900 45 m 100% 7/8"1800 40 m 80% 7/8" + 20% 5/4"

CDMA 450 45 m 100% 7/8"800 45 m 100% 7/8"1900 45 m 80% 7/8" + 20% 5/4"

UMTS 1900/2100 40 m/60 m 80% 7/8" (40 m) + 20%5/4" (60 m)

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4.3 RCUsReceiving control signals sent from the NodeB, the Remote Control Unit (RCU) starts the stepmotor and adjusts the tilt of the antenna by controlling the phase shifter through the drive system.The RCU has a control port, that is, an RS485 port.Huawei provides two types of RCUs: Kathrein RCU and Powerwave RCU. Figure 4-2 showsthe two RCUs.



4-5

Figure 4-2 Kathrein RCU and Powerwave RCU

(1) Connector: linked to the antenna(2) AISG female connector (8-pin): used to cascade RET antennas. This connector is idle now.(3) AISG male connector (8-pin): used to link the signal cable of the RET antenna

CAUTIONl Waterproof treatment is not required for the two connectors shown in part 2 of Figure

4-2.l The RET antennas and the RCUs of different vendors are not compatible with each other.l The Powerwave RCU is already assembled with the RET antenna before delivery. Figure

4-2 does not show the connection between the antenna and the RCU.

The RCU should be mounted on the RET antenna before the RET antenna is installed on thepole.

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4.4 SBTsThe Smart Bias-Tee (SBT) provides DC power and control signals for the RCU through a feeder.The SBT is mounted on the side of the RET antenna.




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The main functions of the SBT are:l Converting OOK control signals from the feeder into RS485 signals, and sending the RS485

signals to the RCUl Converting RS485 signals from the RCU into OOK signals, and sending the OOK signals

to the feederl Sending RF signals from the feeder to the antenna and control signals from the feeder to

the RCU.l Transferring DC power from the feeder to the RCUHuawei provides two types of SBTs: Kathrein SBT and Powerwave SBT. Figure 4-3 showsboth the SBTs.

Figure 4-3 Kathrein SBT and Powerwave SBT

(1) 7/16" DIN female connector (2) 8-pin AISG female connector(3) 7/16" DIN male connector (4) Grounding terminal

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4.5 AISG Control CableThe AISG control cable is a signal cable between the RCU and the SBT (or STMA). The cableconnected to the SBT is 0.5 m long. The cable connected to the STMA is 2 m long.



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The two ends of the AISG control cable that connects the RCU and the SBT (or the STMA) are:l 8-pin AISG male connectorl 8-pin AISG female connector

0.5-m-Long [1.64-Foot-Long] AISG Control CableFigure 4-4 shows the 0.5-m-long [1.64-foot-long] AISG control cable.

Figure 4-4 0.5-m-long [1.64-foot-long] AISG control cable

2-m-Long [6.56-Foot-Long] AISG Control CableFigure 4-5 shows the 2-m-long [6.56-foot-long] AISG control cable.




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Figure 4-5 2-m-long [6.56-foot-long] AISG control cable

15-m-Long [49.21-Foot-Long] AISG Control CableFigure 4-6 shows the 15-m-long [49.21-foot-long] AISG control cable.

Figure 4-6 15-m-long [49.21-foot-long] AISG control cable

(1) AISG male connector (2) AISG female connector



4-9

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4.6 Non-RET BTThe BT is a passive component to couple the DC power or OOK signals into a feeder.Figure 4-7 shows the BT.

Figure 4-7 BT

(1) SMA connector (2) 7/16" DIN female connector(3) Grounding terminal (4) 7/16" DIN male connector

The number of BTs varies according to the feeding modes of the TMA. Table 4-4 describes therelation between the BT quantity and the components of the antenna system.

NOTE

The BT transmits DC signals and RF signals.

Table 4-4 Relation between the BT quantity and the antenna system componentsAntenna System Components Quantity of BTs to Be InstalledTMA Two BTs

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4.7 SplittersThe splitter splits sectors. It can split the RF signals, RET control signals, and DC signals thatare sent from the base station into multiple paths and then transmit them to devices of the antennasystem in the corresponding sectors.The three types of splitters are: 1-for-2, 1-for-3, and 1-for-4. Splitters of different types havedifferent connectors and power. Figure 4-8 shows a 1-for-3 Kathrein splitter.




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Figure 4-8 1-for-3 Kathrein splitter

(1) Output connector: 7/16" DIN female connector(2) Input connector: 7/16" DIN female connector

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5 Control of RET AntennasAbout This Chapter

Huawei base station integrates the functions of controlling RET antennas. It manages the STMAand RCU as internal components. Huawei GSM base station configured with the BT can controlRET antennas.

5.1 Control of Macro Base Station RET AntennasThe RET antennas of the macro base station can be controlled by the method of BT + SBT +RCU. Two methods can be used: SBT + RCU and STMA + RCU.

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BTSAntenna System Installation Guide - RET 5 Control of RET Antennas


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5.1 Control of Macro Base Station RET AntennasThe RET antennas of the macro base station can be controlled by the method of BT + SBT +RCU. Two methods can be used: SBT + RCU and STMA + RCU.

SBT + RCUFigure 5-1 shows the configuration of the SBT + RCU method.

Figure 5-1 SBT + RCU

The procedure for adjusting the tilt of the RET antenna is as follows:1. The M2000 or the LMT or the OMC sends the control signals for the RET antenna to the

base station.2. The NodeB modulates the control signals into OOK signals, and then transfers the OOK

signals and the DC power to the SBT over the feeder.3. In the SBT, the DC power is directly forwarded to the RCU, and the OOK signals are

demodulated and then are converted into RS485 signals before being forwarded to the RCU.

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4. When the RCU receives the RS485 signals, it runs the command as specified in the signalsto adjust the antenna tilt.

STMA + RCUFigure 5-2 shows the configuration of the STMA + RCU method.

Figure 5-2 STMA + RCU

The procedure for adjusting the tilt of the RET antenna is as follows:1. The M2000 or the LMT or the OMC sends the control signals for the RET antenna to the

base station.2. The base station modulates the control signals into OOK signals, and then transfers the

OOK signals and the DC power to the STMA over the feeder.3. In the STMA, the DC power is directly forwarded to the RCU, and the OOK signals are

demodulated and then are converted into RS485 signals before being forwarded to the RCU.4. When the RCU receives the RS485 signals, it runs the command as specified in the signals

to adjust the antenna tilt.

BTSAntenna System Installation Guide - RET 5 Control of RET Antennas


5-3

BT + SBT + RCUFigure 5-3 shows the configuration of the BT + SBT + RCU method.

Figure 5-3 SBT + RCU

The procedure for adjusting the tilt of the RET antenna is as follows:1. The OMC sends the control signals for the RET antenna to the base station.2. The BT receives the OOK signals from the base station, and then couples the OOK signals

and DC power into a feeder.3. In the SBT, the DC power is directly forwarded to the RCU, and the OOK signals are

demodulated and then are converted into RS485 signals before being forwarded to the RCU.4. When the RCU receives the RS485 signals, it runs the command as specified in the signals

to adjust the antenna tilt.support

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6 Antenna System Installation PreparationsAbout This Chapter

Before installing the antenna system, you must keep the necessary tools and instruments, andthe feeder window ready.

Arranging Tools and InstrumentsTable 6-1 lists the tools and instruments required for installing the antenna system. The commontools (such as a percussion drill and a screwdriver) that are used for indoor equipment installationcan also be used for antenna system installation.

Table 6-1 Tools and instruments for the antenna system installationMeasurement Tools Angle display; compassTools for HoistingDevices

Assembly pulley; ropes (a thin one and a thick one. Both of them are150 m [492.12 ft] long); feeder noose

Tools for FeedersFeeder nipper; cable cutter (matching the feeder specification); blastlamp (to warm and soften the waterproof and sealing materials in coldenvironment); anti-rust aluminum paint

Tools for SafetySafety belts (for personnel operating out of the tower platform);protecting caps; safety ropes; thick union suits; RF protectiveclothing; ESD wrist strap

Tools from the LocalCustomer Double ladder; lifting tools for the main feeder wheel spindle

Other Tools Canvas bag for tools; gloves; walkie-talkie; multi-purpose outlets;wrench; screwdriver; pliers; cable peelerTest Instruments Test mobile phone (optional); radio analyzer (such as

CELLMASTER and power meter); VSWR tester (such asSITEMASTER)

BTSAntenna System Installation Guide - RET 6 Antenna System Installation Preparations


6-1

Installing the Feeder WindowRefer to Feeder Windows for details.

Spacing Requirements for Antenna InstallationThe installation of the antenna support and the antenna must satisfy the spacing requirements.Refer to the following for the spacing requirements:l 6.1 Spacing Requirements for GSM Antenna Installationl Spacing Requirements for CDMA Antenna Installationl Spacing Requirements for WCDMA Antenna Installationl Spacing Requirements for WiMAX Antenna Installation6.1 Spacing Requirements for GSM Antenna InstallationThis part describes the spacing requirements for the installation of omnidirectional antennas anddirectional antennas in the GSM system.

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6.1 Spacing Requirements for GSM Antenna InstallationThis part describes the spacing requirements for the installation of omnidirectional antennas anddirectional antennas in the GSM system.

NOTEThe TX antenna can also receive signals. It works in duplex mode.The spacing requirements are provided only for your reference. In field installation, perform the installationin compliance with the engineering design.

Spacing Requirements for Omnidirectional Antenna InstallationWhen the isolation of the omnidirectional antenna is 30 dB, the spacing requirements aredescribed in Table 6-2.

Table 6-2 Spacing requirements for omnidirectional antenna installationAntenna Type Vertical

SpacingHorizontal Spacing Remarks

GSM900: 0.5 m 4 m for gain < 10 dBi The spacing betweenthe antenna and thetower body is 2 m.

TX-TX, TX-RX 5 m for gain > 10 dBi Generally, the RXantenna is installedabove the TX antenna.

GSM1800: 0.3 m 2 m for gain < 10 dBi The spacing betweenthe antenna and thetower body is 2 m.

TX-TX, TX-RX 2.5 m for gain > 10dBi

Generally, the RXantenna is installedabove the TX antenna.

GSM900+GSM1800:

0.2 m 2 m for gain < 10 dBi The spacing betweenthe antenna and thetower body is 2 m.

TX-TX, TX-RX 2 m for gain > 10 dBi Generally, the RXantenna is installedabove the TX antenna.

Requirements for diversity reception:GSM900: RX-RX - 4 m (6 m

recommended)The spacing betweenthe antenna and thetower body is 2 m.

GSM1800: RX-RX - 2 m (3 mrecommended)

The spacing betweenthe antenna and thetower body is 2 m.



6-3

NOTE

l For the expansion in the future, the antenna installation should satisfy the spacing requirementsdescribed in Table 6-3.

l When the TX antenna and the RX antenna share an antenna support due to the limitation of theinstallation environment, the horizontal spacing requirements can be ignored. But the vertical spacingrequirements described in Table 6-2 must be satisfied. The TX antenna and the RX antenna cannot beinstalled in the same horizontal plane.

l The angle of the highest-radiation-intensity directions of antennas should be greater than the half ofthe vertical plane half-power angle of an antenna. The vertical plane half-power angle of an antennanormally is from 4 to 12. Therefore, the angle of the highest-radiation-intensity directions of antennasshould be greater than 7. The higher the antenna gain is, the smaller the angle is.

l Normally, the longer the antenna is, the higher the antenna gain is, and the larger the antenna spacingshould be.

Spacing Requirements for Directional Antenna InstallationWhen the isolation of the 120 directional antenna is 30 dB, the spacing requirements aredescribed in Table 6-3.

Table 6-3 Spacing requirements for directional antenna installationAntenna Type Vertical

SpacingHorizontalSpacing

Remarks

Antennas in thesame sector

GSM900: 0.2 m 2 m No interferencefrom the towercomponents shouldexist in the forwarddirection of theantenna.

TX-TX, TX-RX

GSM1800: 0.2 m 1 m No interferencefrom the towercomponents shouldexist in the forwarddirection of theantenna.

TX-TX, TX-RX

Antennas inadjacent sectorson the sameplatform

GSM900: - 1 m The more thenumber of cells in asite is, the larger thehorizontal spacingshould be.

TX-TX, TX-RX

GSM1800: - 1 m The more thenumber of cells in asite is, the larger thehorizontal spacingshould be.

TX-TX, TX-RX

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Antenna Type VerticalSpacing

HorizontalSpacing

Remarks

Diversityreceptionantennas

GSM900: RX-RX

- 4 m (6 mrecommended)

No interferencefrom the towercomponents shouldexist in the forwarddirection of theantenna.

GSM1800: RX-RX

- 2 m (3 mrecommended)

No interferencefrom the towercomponents shouldexist in the forwarddirection of theantenna.

NOTE

l For the expansion in the future, the antenna installation should satisfy the spacing requirementsdescribed in Table 6-3.

l Directional antennas should not be installed face to face. They should be arranged back to back or sideby side.

l Normally, the longer the antenna is, the higher the antenna gain is, and the larger the antenna spacingshould be.

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7 Procedure for Installing the GSM RETAntenna System

This part describes how to install the GSM RET antenna system, which consists of the antenna,feeders, and ALDs.

ContextThe installation procedures may vary according to the installation environment and antenna type.The project supervisor should arrange the installation work according to the engineeringdocuments, number of installers, installation environment, and antenna type.

ProcedureStep 1 8 Installing the Grounding Bar

NOTE

If the grounding bar is available on site and you need not install it, go to Step 2.

Step 2 Installing Antenna SupportsNOTE

If the antenna support is available on site and you need not install it, go to Step 3.

Step 3 10 Assembling AntennasStep 4 11 Hoisting AntennasStep 5 12 Installing AntennasStep 6 Installing the ALD

1. 14.1 Installing the RCU2. 14.3 Installing the SBT3. Installing the AISG Control Cable

Step 7 15 Installing FeedersStep 8 17 Testing the Antenna System

BTSAntenna System Installation Guide - RET 7 Procedure for Installing the GSM RET Antenna System


7-1

If ... Then ...

The test has passed. Go to Step 9.

The test has failed. Locate and solve the problem. Go to Step 8.

Step 9 Waterproofing Outdoor JointsStep 10 20 Waterproofing the Feeder WindowStep 11 Checking the Installation of the Antenna System

----Endsupport

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8 Installing the Grounding BarUsed for surge protection, the grounding bar should be installed near the cabinet or on therainproof wall of the cable draw pit on the rooftop. In practice, the grounding bar should beinstalled according to the engineering design.

ContextNOTE

Skip this task if the grounding bar is available on site and you need not install it.

Figure 8-1 shows an indoor grounding bar.

Figure 8-1 Indoor grounding bar

(1) Bolt M8

ProcedureStep 1 Install a grounding bar on the wall

BTSAntenna System Installation Guide - RET 8 Installing the Grounding Bar


8-1

Figure 8-2 Installing a grounding bar on the wall

(1) Wall (2) Bolt M8 (3) Bolt M12(4) Spring washer M12 (5) Flat washer (6) Insulation washer a(7) Grounding bar (8) Insulation washer b (9) Expansion tube and nut

The grounding bar used before the feeder is led into the equipment room should be installedunder the feeder window , as shown in Figure 8-3.

Figure 8-3 Grounding bar used before the feeder is led into the equipment room

NOTE

Do rust and dust cleaning before connecting the feeder to the outdoor grounding bar, and prevent the barfrom corrosion and rust after connecting the feeder, so as to ensure reliability.

----Endsupport

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9 Installing Antenna SupportsAbout This Chapter

This part describes the procedure for installing the antenna support on a tower and the precautionsfor the installation.

ContextHuawei provides design requirements of the antenna support. You must install it on site. If theantenna support is installed on site, skip this part.9.1 Installing the Antenna Support on the TowerThis part describes the procedure for installing the antenna support on a tower and the precautionsfor the installation.9.2 Installing the Antenna Support on the RooftopThis part describes the procedure for installing the antenna support on the rooftop and theprecautions for the installation.

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BTSAntenna System Installation Guide - RET 9 Installing Antenna Supports


9-1

9.1 Installing the Antenna Support on the TowerThis part describes the procedure for installing the antenna support on a tower and the precautionsfor the installation.

ContextThere are several types of antenna supports for the installation on the tower platform. This parttakes one type of antenna support as an example. Figure 9-1 shows the structure of the antennasupport on the tower platform.

Figure 9-1 Structure of the antenna support on the tower platform

(1) M12220 bolt (2) Connection base plate (3) M1245 bolt(4) Dead lever (5) Rotating lever (6) Stiffener(7) Stiffener (8) Expansion lever (9) U-bolt

When installing the support on the tower platform, pay attention to the following points:l The dead lever of the antenna support should be vertical to the horizontal plane.

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l The mast of the tower lightning arrester should be installed separately. The height of themast should meet the lightning protection requirements for all antennas. When the antennasupport is extended from the tower platform, the antenna should fall into the protectioncoverage within the 45 tilt angle from the top of the lightning arrester, as shown in Figure9-2.

Figure 9-2 Protection coverage of the lightning arrester

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

l The antenna support should be installed in the direction that does not affect the transmit

and receive performance of the antenna or the adjustment of antenna directions.l If possible, the antenna support should be hung to avoid deformation.l A stiffener should be used to fasten the rotating lever. The expansion lever and the rotating

lever should be cut to a proper length. The cut-off edge should be welded with a cover toprevent entry of water.

l The welding joints should be solid. There should be no dry joints or open welding jointson the antenna support.

l The welding joints should be coated by anti-rust aluminum paint.l A galvanized steel support should be used if possible. The antenna support should be coated

with anti-rust aluminum paint.

ProcedureStep 1 Mount a fixed pulley on the top of the tower. as shown in Figure 9-3.



9-3

Figure 9-3 Hoisting the antenna support or the antenna

Step 2 Lead a rope through the fixed pulley.Step 3 Bind the antenna support to the rope at one side.Step 4 Pull the rope at the other side to lift the antenna support up to the tower. Control the lifting

direction by holding the end of the rope to which the antenna support is bound, as shown inFigure 9-3.

Step 5 Connect the dead lever, the rotating lever, and the expansion lever of the antenna support. Youcan perform this step on the ground or on the tower platform.

Step 6 Determine the installation position of the antenna support on the tower according to theengineering design.

Step 7 Fasten the antenna support.Extend the antenna support from the tower platform. Fasten the antenna support onto the towerusing a U fixing clip, including the connecting piece and U-bolt, as shown in Figure 9-4.




Issue 01 (2009-11-30)

Figure 9-4 Installing the antenna support on the tower platform

(1) Connecting piece (2) U-bolt (3) Horizontal beam

Step 8 Use M1245 bolts to connect the guardrail on the tower platform to the connection base plate.Step 9 Fasten the dead lever on the tower.

If it is difficult to connect the antenna support to the guard rail, weld the guard rail and the baseplate. Ensure that the welding joints are solid and that there are no dry or open joints. Coat theantenna support and all the welding joints using anti-rust paint.

----Endsupport

9.2 Installing the Antenna Support on the RooftopThis part describes the procedure for installing the antenna support on the rooftop and theprecautions for the installation.

ContextThere are several types of antenna supports for the installation on the rooftop. This part takesone type of antenna support as an example. Figure 9-5 shows the structure of the antenna supporton the rooftop.



9-5

Figure 9-5 Structure of the antenna support on the rooftop

(1) Lightning rod (2) Welding joint (3) Main support 2(4) M10x50 bolt (5) Stiffener (6) Main support 1(7) Base plate of the main support (8) Base anchor of the stiffener (9) Main support 2(10) M10x50 hex bolt (11) Connecting piece of the stiffener (12) M12x60 expansion bolt

When installing the support on the rooftop, pay attention to the following points:l If the omnidirectional antenna is installed on the rooftop, the lightning arrester should not

be installed on the support. The lightning arrester should be installed on another supportseparately.




Issue 01 (2009-11-30)

Figure 9-6 Protection coverage of the lightning rod

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

l If a lightning rod is installed on the antenna support, the antenna should protrude 1 m [3.28

ft] to 1.5 m [4.92 ft] out of the support.l The connecting pieces on the stiffener should be installed in a place that does not affect the

adjustment of antenna directions and tilt angle.l The dead lever of the antenna support should be vertical to the horizontal plane.l When the directional antenna is installed on the rooftop, a lightning arrester should be

installed on the antenna support and the antenna support should be connected with thegrounding grid of the building.

l The welding joints should be coated with anti-rust aluminum paint. The welding jointsshould be solid and there should be no dry joints or open welding joints on the antennasupport.

ProcedureStep 1 Hoist or lift the support onto the roof. For the hoisting procedure, refer to the related contents

in the part Installing the Antenna Support on the Tower.Step 2 Determine the installation position of the antenna support on the rooftop according to the

engineering design.Step 3 Use three M1260 bolts to fasten the support base vertically to the rooftop, as shown in Figure

9-5.

Step 4 Use a connecting piece to connect the stiffener to the main support, as shown in Figure 9-5.Step 5 Connect the base anchor with the stiffener. Use M1060 bolts (two M1060 bolts for each

stiffener) to fasten the stiffeners on the rooftop. Ensure that the stiffeners are connected properly.Step 6 Use six M1050 bolts to securely connect the main support 2 to the main support 1, as shown

in Figure 9-5.Step 7 Coat the support base and all the welding joints using anti-rust paint.Step 8 Cover the support base, the base anchors of stiffeners, and the expansion bolts using concrete.



9-7

NOTE

l If the support on the roof is not welded with the outdoor cable rack or the support is welded with thecable rack but not connected with the grounding grid of the building, use a lightning connecting pieceto connect the support base with the grounding grid of the building. The lightning connecting piece isa component of the outdoor cable rack.

----Endsupport




Issue 01 (2009-11-30)

10 Assembling AntennasAbout This Chapter

Before installing an antenna on a tower, you need to assemble the antenna. The antenna to beassembled can be an omnidirectional antenna or a directional antenna.

10.1 Assembling Omni-directional AntennasThis describes how to assemble the omni-directional antenna accessories before the antennainstallation.10.2 Assembling Directional AntennaThis describes how to assemble the accessories of the directional antenna before installing theantenna.

support

BTSAntenna System Installation Guide - RET 10 Assembling Antennas


10-1

10.1 Assembling Omni-directional AntennasThis describes how to assemble the omni-directional antenna accessories before the antennainstallation.

PrerequisiteThe omni-directional antenna accessories and jumpers are ready.

ContextNOTE

There are various types of fixing clips used for omnidirectional antennas, so the installation methods aredifferent. The following part describes how to use fixing clips as shown in Figure 10-1 to install an omni-directional antenna.

Figure 10-1 Fixing clip of the omni-directional antenna

ProcedureStep 1 Instal two fixing clips of the omni-directional antenna, as shown in Figure 10-2.

10 Assembling AntennasBTS



Issue 01 (2009-11-30)

Figure 10-2 Assembling fixing clips for the omnidirectional antenna

(1) Omni-directional antenna (2) Antenna jacket (3) Fixing clip of the omni-directional antenna

Step 2 Connect the jumper connector with the antenna connector tightly.Step 3 Attach engineering labels or colored rings on the joints between the antenna and the jumper. For

details, refer to Labeling the Antenna System or 18 Installing Color Rings for the AntennaSystem.

NOTE

You can also perform the opeations in Step 2 on the tower.

----Endsupport

10.2 Assembling Directional AntennaThis describes how to assemble the accessories of the directional antenna before installing theantenna.

PrerequisiteThe directional antenna accessories and jumper are available.

ContextNOTE

There are various types of fixing clips used for directional antennas, so different installation methods canbe used to meet the actual demands. The following part describes how to use fixing clips to install adirectional antenna. Take the fixing clips shown in Figure 10-3 as an example.

BTSAntenna System Installation Guide - RET 10 Assembling Antennas

Issue 01 (2009-11-30) Huawei Propri

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