COMBA SR-9120 User manual

INSTALLATION GUIDE FOR SR-9120
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SR-9120
GSM900 BANDWIDTH ADJUSTABLE
REPEATER
INSTALLATION GUIDE
The information contained herein is the
responsibility of and is approved by the
following, to whom all enquiries should
be directed in the first instance:
Technical writing
Comba Telecom Ltd.
This is an unpublished work the copyright in which vests in Comba International ("Comba"). All rights reserved.
The information contained herein is confidential and the property of Comba and is supplied without liability for errors or
omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The
copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.

INSTALLATION GUIDE FOR SR-9120
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0.2 CONTENTS
Section Page
0.2 CONTENTS...........................................................................................................................2
0.3 INDEX TO FIGURES AND TABLES.....................................................................................4
0.4 HISTORY...............................................................................................................................5
0.5 ISSUE CONTROL.................................................................................................................6
0.6 REFERENCES......................................................................................................................7
0.7 GLOSSARY OF TERMS.......................................................................................................8
0.8 SAFETY NOTICES AND ADMONISHMENTS......................................................................9
0.9 SERVICING POLICY AND RETURN OF EQUIPMENT.....................................................10
0.10 READERS COMMENTS.....................................................................................................10
1GENERAL INFORMATION.................................................................................................12
2EQUIPMENT DESCRIPTION..............................................................................................14
2.1 SR-9120 SYSTEM DIAGRAM.............................................................................................14
2.2 GENERAL APPLICATIONS................................................................................................15
2.3 EQUIPMENT LAYOUT........................................................................................................17
2.4 GENERAL DESCRIPTION..................................................................................................18
2.5 KIT OF PARTS (KOP).........................................................................................................19
3INSTALLATION...................................................................................................................20
3.1 WARNINGS AND ALERTS.................................................................................................20
3.2 SITE PLANNING CONSIDERATIONS................................................................................21
3.2.1 EQUIPMENT INSTALLATION CHECKLIST.......................................................................22
3.2.2 ANTENNA INSTALLATION CONSIDERATION .................................................................22
3.2.3 CABLE REQUIREMENTS...................................................................................................22
3.3 INSTALLATION PROCEDURES ........................................................................................23
3.3.1 GOODS INWARDS INSPECTION......................................................................................23
3.3.2 TOOLS.................................................................................................................................23
3.3.3 PREPARATION...................................................................................................................23
3.3.4 MOUNTING ARRANGEMENT............................................................................................24
3.3.5 MOUNTING MOUNTING OPTION .....................................................................................25
3.3.6 POLE MOUNTING DETAILS ..............................................................................................26
3.3.7 DRIP-LOOP.........................................................................................................................26
3.3.8 EQUIPMENT CONNECTIONS ...........................................................................................27
4COMMISSIONING...............................................................................................................30
4.1 MCU LED INDICATORS.....................................................................................................30
4.2 EQUIPMENT POWER-UP ..................................................................................................30
4.3 OMT.....................................................................................................................................31
4.3.1 OMT SOFTWARE VERSION..............................................................................................31
4.3.2 OMT SOFTWARE INSTALLATION ....................................................................................31
4.3.3 NON-VOLATILE MEMORY.................................................................................................31
4.3.4 PHYSICAL PREPARATION FOR OMT CONNECTION TO EQUIPMENT........................32
4.3.5 OMT COMMUNICATING WITH EQUIPMENT ...................................................................33
4.3.6 DESCRIPTION OF PARAMETERS....................................................................................36
4.4 COMMISSIONING PROCEDURES....................................................................................42
4.5 REMOTE MONITORING USING OMC...............................................................................42
5OPERATION........................................................................................................................43
6MAINTENANCE ..................................................................................................................44
7APPENDICES......................................................................................................................45

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7.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE.................................45
7.2 APPENDIX B: CHANNEL NUMBER AND FREQUENCY TABLE......................................46
7.3 APPENDIX C: OMT INSTALLATION AND UN-INSTALLATION........................................51
7.4 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) FORM.............................55

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0.3 INDEX TO FIGURES AND TABLES
Figure 1: Front, side and bottom views of SR-9120 enclosure.....................................................................13
Figure 2: SR-9120 system diagram..............................................................................................................14
Figure 3: Centralized remote control and monitoring ...................................................................................15
Figure 4: Centralized local control and monitoring .......................................................................................15
Figure 5: Remote control and monitoring for single equipment....................................................................16
Figure 6: SR-9120 Equipment Internal View ................................................................................................17
Figure 7: Mounting rack dimensions.............................................................................................................24
Figure 8: Wall mounting of SR-9120.............................................................................................................25
Figure 9: Pole mounting of SR-9120.............................................................................................................26
Figure 10: Connection for SR-9120..............................................................................................................27
Figure 11: Centralized Remote Control and Monitoring ...............................................................................28
Figure 12: Layout below Bottom Cover.........................................................................................................29
Figure 13: Wireless Modem..........................................................................................................................32
Figure 14: Connection Type..........................................................................................................................33
Figure 15: Comm.Setting Menu....................................................................................................................33
Figure 16: Serial Port Configuration..............................................................................................................33
Figure 17: Wireless Modem Initialized..........................................................................................................34
Figure 18: Online OK ....................................................................................................................................34
Figure 19: Master Unit Main Screen.............................................................................................................36
Figure 20: Master Network Paramete...........................................................................................................36
Figure 21: Slave Site Address ......................................................................................................................36
Figure 22: OMT Explorer V2.10 Installation Window....................................................................................52
Figure 23: OMT Explorer V2.10 Installation Finish Window.........................................................................52
Figure 24: OMT Component Installation Finish Message ............................................................................53
Figure 25: OMT Un-installation confirmation Message ................................................................................53
Figure 26: OMT Component V1.00 Un-installation Finish Message ............................................................ 54
Figure 27: OMT Explorer V2.10 Un-installation Finish Message..................................................................54
Table 1: SR-9120 KOP .................................................................................................................................19
Table 2: Repeater Installation Checklist.......................................................................................................22
Table 3: Antenna installation checklist..........................................................................................................22
Table 4: Cable types used with SR-9120 enclosure.....................................................................................22
Table 5: Indicator LEDs ................................................................................................................................30
Table 6: Master Unit Network Parameter .....................................................................................................37
Table 7: Management - RF Parameters .......................................................................................................39
Table 8: Management - Alarm List................................................................................................................40
Table 9: Commissioning Procedures for Master Unit and Slave Unit .......................................................... 42
Table 10: Alarms Diagnosis..........................................................................................................................43

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0.4 HISTORY
Change No. ENU Details Of Change
1 1-0-0 Document created on 22th Jan, 07
2 1-0-1 Updated Hongkong office address in Feb 2008

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0.5 ISSUE CONTROL
Date 22
Jan
07
20
Feb
08
Section
All all all

INSTALLATION GUIDE FOR SR-9120
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0.6 REFERENCES
0.6.1 RS-2110B QE 1-0-0
Released in August, 2005 RS-2110B GSM900 Bandwidth Adjustable Repeater Equipment Manual, RS-2110B = SR-9120
0.6.2 SR-9120 DS 3-1-2
released on Jan-05-2007 SR-9120 GSM900 Bandwidth Adjustable Repeater Datasheet

INSTALLATION GUIDE FOR SR-9120
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0.7 GLOSSARY OF TERMS
Acronym Definition
ALC Automatic Level Control
ATT Attenuation
BS Base Station
BTS Base Transceiver Station
CDMA Code Division Multiple Access
CSA Cross Sectional Area
dB Decibel
dBm Decibels relative to 1 milliwatt
DL Downlink
DPX Duplexer
DT Donor Terminal
EEPROM Electrically Erasable Programmable Read Only Memory
FS Frequency Selector
FSA Frequency Selector Amplifier
GSM Global System for Mobile Communication
Hz Hertz
ID Identification
IF Intermediate Frequency
LNA Low Noise Amplifier
MCU Main Control Unit
MHz Megahertz
MS Mobile Subscriber
MT Mobile Terminal
MTBF Mean Time Between Failures
NC Normally Closed
NF Noise Figure
NO Normally Open
OMC Operation and Maintenance Centre
OMT Operation and Maintenance Terminal
PA Power Amplifier
PLL Phase Locked Loop
PSU Power Supply Unit
RF Radio Frequency
SMA Sub-Miniature A Connector (coaxial cable connector type)
UL Uplink
VAC Volts Alternating Current
VSWR Voltage Standing Wave Ratio

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0.8 SAFETY NOTICES AND ADMONISHMENTS
This document contains safety notices in accordance with appropriate standards. In the interests of
conformity with the territory standards for the country concerned, the equivalent territorial admonishments
are also shown.
Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained,
authorized personnel. At all times, personnel must comply with any safety notices and instructions.
Specific hazards are indicated by symbol labels on or near the affected parts of the equipment. The labels
conform to international standards, are triangular in shape, and are colored black on a yellow background.
An informative text label may accompany the symbol label.
Hazard labeling is supplemented by safety notices in the appropriate equipment manual. These notices
contain additional information on the nature of the hazard and may also specify precautions.
Warning:
These draw the attention of personnel to hazards which may cause death or injury to the operator or others.
Examples of use are cases of high voltage, laser emission, toxic substances, point of high temperature, etc.
Alert:
These draw the attention of personnel to hazards which may cause damage to the equipment. An example
of use is the case of static electricity hazard.
Caution notices may also be used in the handbook to draw attention to matters that do not constitute a risk
of causing damage to the equipment but where there is a possibility of seriously impairing its performance,
e.g. by mishandling or gross maladjustment. Warnings and Cautions within the main text do not
incorporate labels and may be in shortened form.

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0.9 SERVICING POLICY AND RETURN OF EQUIPMENT
The repair of individual units and modules of this equipment is not considered practicable without factory
facilities. It is, therefore, the policy of Comba whereby faulty units or modules are returned to the local
agent for repair.
To enable an efficient, prompt after sales service to be provided for the diagnosis, repair and return of any
faulty equipment, please comply with the following requirements.
Items to be sent for repair should be packaged so as to provide both electrostatic and physical protection
and a Repair Material Authorization (a sample of this form is in the appendix) completed giving the
required information.
This request must be included with the item for repair, items for repair should be sent to the nearest
Comba office:
COMBA TELECOM LTD.
Hong Kong Office
Address: 611 East Wing, No. 8 Science Park West Avenue, Hong Kong Science Park,
Tai Po, Hong Kong.
Tel: [phone]
Fax: [phone]
Email: [email protected]
Singapore Office
Address: 865 Mountbatten Road, Katong SC #05-43, Singapore 437844
Tel: + 65 6345 4908
Fax: + 65 6345 1186
Email: [email protected]
Thailand Office
Address: 3rd Floor, T. Shinawatra Building, 94 Sukhumvit Soi 23, Sukhumvit Road, Klongtoeynua, Wattana,
Bangkok 10110
Tel: [phone]
Fax: [phone]
India Office
Address: Suit No. 202, Chintels Business Centre, A-11 Kailash Colony, New Delhi 110048, India
Tel: + 91 11 5173 9997 / 8
Fax: + 91 11 5173 9996
Email: [email protected]
Sweden Office
Address: Gustavslundsvagen 147, S- 167 51 Bromma, Stockholm, Sweden
Tel: [phone]
Fax: [phone]
Email: [email protected]
Brazil Sales Office
Address: Rua Gomes de Carvalho 1655 cj 101 / 102, 04547-006 Vila Olímpia, São Paulo, Brazil
Tel: [phone]
Fax: [phone]
Email: [email protected]
China Office
Address: No.10, Shenzhou Road, Guangzhou Science City, Guangzhou, China
Tel: + 86 20 2839 0000
Fax: + 86 20 2839 0136
Email: [email protected]

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0.10 READERS COMMENTS
Whilst every endeavour is made to ensure the accuracy of this and all Comba documents, there is always
the possibility that an inaccuracy or omission could occur.
In order that any amendment/remedial action can be carried out promptly, we would appreciate your co–
operation in filling out and returning a photocopy of this customer reply sheet as soon as possible.
Customer Information:
Name
Title
Company
Date
Address
Telephone Number
Customer Comments:
Equipment title
ENU 1-0-1
Page number
Paragraph number
Line number
Figure number
Details of inaccuracies
Other comments
Contact points:
Technical Writing
E-mail: [email protected]
FAX: [phone]
End of section

INSTALLATION GUIDE FOR SR-9120
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1 GENERAL INFORMATION
The SR-9120 GSM900 Bandwidth Adjustable Repeater is used in indoor locations where small-scale
signal coverage for city structures is desired (e.g., hotels, department stores and shopping malls,
underground parking lots and tunnels, convention centers, arenas, airports, etc.)
The SR-9120 is designed for indoor operation in the GSM900 band. The band-specific linear amplifier
amplifies the desired BTS carriers and IF filtering effectively provides superior out-of-band rejection.
Remote configuration and surveillance is possible through Comba’s remote control and monitoring system,
via laptop or wireless modem to the OMT/OMC.
Characteristics of the SR-9120 are as follows:
•Downlink output power options of 0.5W, 1W or 2W.
•Bandwidth adjustable with user-customized maximum bandwidth from 2 to 25 MHz.
•IF filtering and amplification of both uplink and downlink signals with good system gain.
•Can be configured as Master Unit (MS) or Slave Unit (SU) in a centralized monitoring system.
•VSWR, DL Power Low and Over Temperature alarm features available.
•Automatic temperature compensation for gain and working frequency.
•Local control and monitoring function: Operating status and parameters can be set or monitored by
OMT PC.
•Optional OMC is available for remote operation and maintenance via an integrated wireless modem.
•Internal back-up battery keeps the equipment running for up to two hours after power failure.
•The enclosure is designed for all weather environment - waterproof, damp-proof and omni-sealed
(IP55).
Two product variants exist with SR-9120 – please refer to the product label for the identifier code to
confirm exact product variant.
Note: For some markets, this product is also known as RS-2110B.
Identifier Code Main Features
SR-9120-C2 With integrated wireless modem. Function as Master or Slave Unit in centralized
monitoring system. Both local and remote control and monitoring are available.
SR-9120-C1 Without integrated wirelss modem. Function as Slave Unit in centralized monitoring
system. Only local control and monitoring is available.

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The figure below shows the front, side and bottom views of the SR-9120 enclosure:
512
382 165
Figure 1: Front, side and bottom views of SR-9120 enclosure
End of Section

INSTALLATION GUIDE FOR SR-9120
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2 EQUIPMENT DESCRIPTION
2.1 SR-9120 SYSTEM DIAGRAM
LNA1
LNA2
Service
ANT
Donor
ANT
Mobile
Power
Supply
Alarm
Indicator Main Control Unit
External
Power
OMT
Li-ion
BATT
Modem
DT MT
OMT
Computer with
Data card
Wireless
Modem
OMC
PA1
PA2
DL Frequency
Selective Module
UL Frequency
Selective Module
BTS
DPX1 DPX2
Figure 2: SR-9120 system diagram
In downlink, the BTS signals are received by donor antenna of the repeater. After the duplexer, the signals
are sent to the LNA for pre-amplification, followed by band selection by the Frequecny Selection (FS)
Module. Then the power amplifier (PA) amplifies the carriers to the desired output power before combining
with the uplink signals in the duplexer to share a single service antenna.
In uplink, the mobile signals are received by the service antenna. After the duplexer, the signals are sent to
the LNA, FS and PA modules. After combining with the downlink signals in the duplexer, the uplink signals
are sent to the donor antenna for transmission back to the BTS.
The FS and PA modules are usually integrated into one module called FSAmodule.

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2.2 GENERAL APPLICATIONS
Centralized Control and Monitoring
Centralized control and monitoring is applicable for indoor systems employing several indoor repeaters.
For remote control and monitoring, the operating status of each remotely-connected slave repeater can be
monitored by the OMC through the Master Unit (with integrated wireless modem). The Master Unit is
locally connected with the Slave Unit via RS-485 communication bus. The communication between the
Master Unit and OMC is via SMS or datalink.
Master Unit
Slave Unit 1 Slave Unit
OMC
OMT PC
RS-485 Communication Bus
RS-232
RS-485
RS-485 RS-485 RS-485
GSM/PSTN Network
Slave Unit 2 Slave Unit n
Modem Modem
n≤32
Figure 3: Centralized remote control and monitoring
For local control and monitoring, the Slave units are connected with the Master Unit via RS-485
communication bus, and the working status of each Slave Unit can be locally monitored through the Master
Unit.
Master Unit
Slave Unit 1 Slave Unit
OMT PC
RS-485 Communication BusRS-485
RS-485 RS-485 RS-485
Slave Unit 2 Slave Unit n
Modem
n≤32
Master Unit
Slave Unit 1 Slave Unit
OMT PC
RS-485 Communication BusRS-485
RS-485 RS-485 RS-485
Slave Unit 2 Slave Unit n
Modem
n≤32
Figure 4: Centralized local control and monitoring

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Remote Control and Monitoring of Single Equipment
In addition to being monitored by OMT locally, a group of repeaters can be remotely controlled and
monitored by OMT/OMC. Remote control and monitoring of single equipment is applicable for indoor
system with small coverage requirement. For any group of repeaters being controlled and monitored, the
recommended number in the group should not exceed 20 to achieve the best performance from the
OMT/OMC.
Modem
OMT/OMC
Modem
GSM/PSTN Network
SR-9120
Modem
OMT/OMC
Modem
GSM/PSTN Network
SR-9120
Figure 5: Remote control and monitoring for single equipment

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2.3 EQUIPMENT LAYOUT
The following figure shows the internal layout of the SR-9120 enclosure:
VSWR Testing Module DL LNA
UL LNA
Duplexer
ANT
TX RX
ANT
RX
RX
Li-ion Batt
PSU
MCU
Wireless
MODEM
DL FSA
UL FSA
Duplexer
DT RS-232 Grounding
Pole MT
Figure 6: SR-9120 Equipment Internal View

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2.4 GENERAL DESCRIPTION
The SR-9120 consists of the following:
yVSWR Testing Module: This is located towards the DT port and is used to detect VSWR of the DT
Port and provide the coupling of RF signals for the wireless Modem.
yUL/DL Low Noise Amplifier (LNA): This is used to pre-amplify the incoming RF signal in both DL and
UL branches.
yDuplexer (DPX): This is located towards the DT and MT ports and is used to combine/separate the UL
and DL signals to share a commen antenna.
yMain Control Unit (MCU): This is used to monitor and control the operation parameters of the repeater
and provides telecommunication interface for remote control. LED indicators on it provides the
operation status of the MCU.
yWireless Modem: This is used for remote system monitoring.
yUL/DL Frequency Selector Amplifier (FSA): This is used to select the required carriers and effectively
reject the unwanted signals, followed by power amplification.
yPower Supply Unit (PSU): This is used to convert the input AC voltage into a stable DC to supply
power for other modules and to charge the internal Li-ion battery.
yLi-ion Battery: This is used to supply power to the MCU for up to two hours in the event of mains
failure.

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2.5 KIT OF PARTS (KOP)
For each SR-9120, the following are supplied
Product Identifier Description Quantity
P-4000YL-5107 Mounting Rack for wall or pole mounting 1
M10x110 Masonry Bolt for wall mounting 6
M10x85x110 U Bolt for pole mounting 2
R-9122C/R-9122AC RS-232 Commissioning Cable (labeled as 9122) 1
DB9-RJ45 RS-485 Communication bus 1
3.15A Delay Fuse Replacement Fuse for 2
V1.00 OMT software
V2.10 OMT Explorer software 1 CD-
ROM
SR-9120 QI 1-0-1 This manual 1
Table 1: SR-9120 KOP
End of Section

INSTALLATION GUIDE FOR SR-9120
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3 INSTALLATION
3.1 WARNINGS AND ALERTS
Radio Frequency Energies
There may be situations, particularly for workplace environments near high-powered RF sources, where
recommended limits for safe exposure of human beings to RF energy could be exceeded. In such cases,
restrictive measures or actions may be necessary to ensure the safe use of RF energy.
High Voltage
The equipment has been designed and constructed to prevent, as far as reasonably, practicable danger.
Any work activity on or near equipment involving installation, operation or maintenance must be, as far as
reasonably, free from danger.
Where there is a risk of damage to electrical systems involving adverse weather, extreme temperatures,
wet, corrosive or dirty conditions, flammable or explosive atmospheres, the system must be suitably
installed to prevent danger.
Protective Earthing
Equipment provided for the purpose of protecting individuals from electrical risk must be suitable for the
purpose and properly maintained and used.
Handling Precautions
This covers a range of activities including lifting, lowering, pushing, pulling, carrying, moving, holding or
restraining an object, animal or person. It also covers activities that require the use of force or effort, such
as pulling a lever, or operating power tools.
Electrostatic Discharge (ESD)
Observe standard precautions for handling ESD-sensitive devices. Assume that all solid-state electronic
devices are ESD-sensitive. Ensure the use of a grounded wrist strap or equivalent while working with ESD-
sensitive devices. Transport, store, and handle ESD-sensitive devices in static-safe environments.