COMBA RD-7843 User manual

INSTALLATION GUIDE FOR RD-7843
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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.
RD-7843
GSM1800 BANDWIDTH ADJUSTABLE
+ WCDMA2100 CHANNEL SELECTIVE
DUAL BAND REPEATER
INSTALLATION GUIDE
This is an unpublished work the copyright in which vests in Comba International ("Comba").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 authorized 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.

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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......................................................................................................11
1GENERAL INFORMATION..................................................................................................12
1.1 RD-7843 INSTRODUCTION ...............................................................................................12
2EQUIPMENT DESCRIPTION..............................................................................................13
2.1 RD-7843 FUNCTIONAL BLOCK DIAGRAM .......................................................................13
2.2 EQUIPMENT LAYOUT ........................................................................................................14
2.3 EQUIPMENT CONSTITUTION ...........................................................................................14
2.4 KITS OF PARTS ..................................................................................................................15
3INSTALLATION ...................................................................................................................16
3.1 WARNINGS AND ALERTS..................................................................................................16
3.2 SITE PLANNING CONSIDERATIONS ................................................................................17
3.2.1 REPEATER INSTALLATION CHECKLIST..........................................................................18
3.2.2 ANTENNA INSTALLATION CHECKLIST............................................................................18
3.2.3 CABLE REQUIREMENT......................................................................................................18
3.3 INSTALLATION PROCEDURES.........................................................................................19
3.3.1 GOODS INWARDS INSPECTION ......................................................................................19
3.3.2 TOOLS .................................................................................................................................19
3.3.3 PREPARATION ...................................................................................................................19
3.3.4 MOUNTING RACK DIMENSION.........................................................................................20
3.3.5 WALL MOUNTING DETAILS ..............................................................................................21
3.3.6 POLE MOUNTING DETAILS...............................................................................................22
3.3.7 DRIP-LOOP .........................................................................................................................22
3.4 EQUIPMENT CONNECTORS.............................................................................................23
3.5 EQUIPMENT CONNECTIONS............................................................................................23
3.5.1 GROUNDING CONNECTION .............................................................................................23
3.5.2 SERVICE VOLTAGE CONNECTION..................................................................................24
3.5.3 LI-ION BATTERY CONNECTION .......................................................................................24
3.5.4 RF CABLE CONNECTION ..................................................................................................24
3.5.5 PHYSICAL CONNECTION TO OMT PC.............................................................................24
3.6 PREPARATION FOR REMOTE CONTROL OF EQUIPMENT USING MODEM ...............25
4COMMISSIONING ...............................................................................................................26
4.1 MCU LED INDICATORS......................................................................................................26
4.2 EQUIPMENT POWER-UP...................................................................................................27
4.3 OMT .....................................................................................................................................27
4.4 NON-VOLATILE MEMORY .................................................................................................27
4.5 LOCAL COMMISSIONING ..................................................................................................28
4.5.1 USING OMT SOFTWARE (WCDMA UNIT) ........................................................................28
4.5.2 USING OMT SOFTWARE (GSM UNIT) ..............................................................................29
4.5.3 PARAMETER DESCRIPTION.............................................................................................31
4.6 COMMISSIONING PROCEDURE.......................................................................................36

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5OPERATION........................................................................................................................37
6MAINTENANCE...................................................................................................................38
7APPENDICES......................................................................................................................39
7.1 APPENDIX A: TOOLS .........................................................................................................39
7.2 APPENDIX B: WCDMA2100 CHANNEL NUMBER AND FREQUENCY TABLE ...............40
7.3 APPENDIX C: GSM1800 CHANNEL NUMBER AND FREQUENCY TABLE .....................41
7.4 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) FORM .............................44

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0.3 INDEX TO FIGURES AND TABLES
Figure 1: Views of RD-7843 enclosure ........................................................................................................ 12
Figure 2: RD-7843 functional block diagram................................................................................................ 13
Figure 3: Layout of the RD-7843 .................................................................................................................. 14
Figure 4: Mounting rack dimension .............................................................................................................. 20
Figure 5: Wall mounting overview ................................................................................................................ 21
Figure 6: Pole mounting overview ................................................................................................................ 22
Figure 7: Equipment connectors .................................................................................................................. 23
Figure 8: RF cable connection ..................................................................................................................... 24
Figure 9: Wireless modem ........................................................................................................................... 25
Figure 10: Location of MCU and LEDs of WCDMA unit .............................................................................. 26
Figure 11: Location of MCU and LEDs of GMS unit .................................................................................... 27
Figure 12: Connection to the equipment ...................................................................................................... 28
Figure 13: Serial port configuration .............................................................................................................. 28
Figure 14: Remote connection ..................................................................................................................... 29
Figure 15: Connection to the equipment ...................................................................................................... 29
Figure 16: OMT screenshot - communication setup .................................................................................... 30
Figure 17: OMT screen – online ok.............................................................................................................. 31
Table 1: Kit of parts ...................................................................................................................................... 15
Table 2: Repeater installation checklist........................................................................................................ 18
Table 3: Antenna installation checklist ......................................................................................................... 18
Table 4: Cable requirement.......................................................................................................................... 18
Table 5: MCU LEDs of WCDMA unit............................................................................................................ 26
Table 6: MCU LEDs of GSM unit ................................................................................................................. 26
Table 7: Management - Network Parameters .............................................................................................. 32
Table 8: RF parameters description of WCDMA unit ................................................................................... 33
Table 9: RF parameters description of GSM unit......................................................................................... 34
Table 10: Properties Info descriptions of WCDMA unit................................................................................ 35
Table 11: Alarm list of WCDMA unit............................................................................................................. 35
Table 12: Alarm list of GSM unit................................................................................................................... 35
Table 13: Commissioning procedures.......................................................................................................... 37
Table 14: Alarms diagnosis .......................................................................................................................... 38

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0.4 HISTORY
Change No. ENU Details Of Change
1 1-0-0 Document first created and released in Apr 2008.

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0.5 ISSUE CONTROL
Date 03
Apr
08
Section
All All

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0.6 REFERENCES
0.6.1 RD-7843 DS 1-2-0 Datasheet released in Nov 2007.
0.6.2 OMT v3.2 QE 1-1-0 OMT v3.2 product manual released in Feb. 2007

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0.7 GLOSSARY OF TERMS
Abbreviation Definition
ALC Automatic Level Control
ATT Attenuator
BTS Base Transceiver Station
CH Channel
dB Decibel
dBm Decibels relative to 1 milliwatt
CPC Circular Plastic Connector
DL Downlink
DT Donor Terminal
DPX Duplexer
EEPROM Electrically Erasable Programmable Rom
FS Frequency Selection
GSM Global Standard for Mobile Communication
Hz Hertz
ID Identification
IF Intermediate Frequency
LNA Low Noise Amplifier
MCU Main Control Unit
MHz Megahertz
MT Mobile Terminal
MTBF Mean Time Between Failures
NF Noise Figure
OMC Operation & Maintenance Center
OMT Operation & Maintenance Terminal
PA Power Amplifier
PLL Phase Locked Loop
PSU Power Supply Unit
RF Radio Frequency
SIM Subscriber Identification Module
SMA Sub-Miniature A Connector
SMS Short Message Service
UL Uplink
VAC Volts Alternating Current
VDC Volts Direct Current
VSWR Voltage Standing Wave Ratio
WCDMA Wideband-Code Division Multiple Access

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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 coloured 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 Notices:
These draw the attention of personnel to hazards that 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 Notices:
These draw the attention of personnel to hazards that 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 (RMA) should be completed giving the required information. A sample
RMA form is provided in Appendix D.
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: Suite No. 2, E-172, TSH House, Greater Kailash – I, New Delhi – 110 048, 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
Avenida Engenheiro Luiz Carlos Berrini 1297, cj 122, sala 03 04571-090 São Paulo, Brazil
Tel: [phone]
Fax: [phone] ext 7
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, it is necessary to fill out and return
a photocopy of this customer reply sheet as soon as possible.
Customer Information:
Name
Title
Company
Date
Address
Telephone Number
Customer Comments:
Equipment title RD-7843 QI
ENU 1-0-0
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

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1 GENERAL INFORMATION
1.1 RD-7843 INSTRODUCTION
RD-7843 GSM1800 Bandwidth Adjustable + WCDMA2100 Channel Selective Dual Band Repeater (herein
after called “RD-7843”) is designed for dual band operation for GSM1800 and WCDMA2100. Independent
Band-specific linear amplifier and filtering effectively amplifies the desired BTS carriers and provides
superior out-of-band rejection. Remote configuration and surveillance is possible through Comba’s remote
control and monitoring system, via PC or wireless modem to the OMT/OMC. Internal Li-ion backup battery
ensures alarm signals are sent out during power failure. The RD-7843 comes in a completely sealed, cast
aluminum enclosure, suitable for all weather conditions.
Main Features of RD-7843:
zDual band configuration consists of GSM1800 and WCDMA in a single unit minimized installation
footprint.
zGSM1800 - Adjustable bandwidth from 2 to 19MHz, WCDMA - Channel Selective 1-2 channel
zIntegrated wireless modem for remote configuration, monitoring and control.
zInternal backup battery keeps the alarm unit running for up to three hours after power failure.
z3GPP TS25.106compliant (WCDMA).
zOptional OMC is available for remote operation and maintenance of a group of repeaters.
zDesigned for all weather outdoor installation – waterproof, damp-proof and omni-sealed (IP65).
The following figure shows the enclosure of the RD-7843:
295
450
600
Figure 1: Views of RD-7843 enclosure
End of section

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2 EQUIPMENT DESCRIPTION
2.1 RD-7843 FUNCTIONAL BLOCK DIAGRAM
Mobile
Ant
Donor
Ant
GSM
Mobile
DT MT
BTS
LNA
LNA
Mobile
Ant
Donor
Ant
WCDMA
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
PA
PA
DL Frequency
Selective Module
UL Frequency
Selective Module
BTS
LNA
LNA
PA
PA
DL Channel Selective
Module
DL Channel Selective
Module
UL Channel Selective
Module
UL Channel Selective
Module
Power
Supply
Alarm
Indicator Main Control Unit Li-ion
BATT
Modem
Figure 2: RD-7843 functional block diagram

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2.2 EQUIPMENT LAYOUT
The following figure shows the equipment internal layout, the WCDMA2100 unit is shown on the left, with the
GSM1800 unit on the right. The PSU converts the input voltage into a stable DC to provide power to the
functional modules.
Li-ion
battery
MCU
UL FS UL PA DL FS
DPXDPX
DL PA
Distribution board
PSU
X18
UL PA
GND
GND
Wireless modem
UL FS
DL PA
DPX
MCU Distribution board
Li-ion
battery
UL LNA
DL LNA
Surge
protector
PSU
MT
DT
DPX
DL FS
Lock
Figure 3: Layout of the RD-7843
2.3 EQUIPMENT CONSTITUTION
Frequency Selector (FS)
The FS is used to select the desired carriers and reject unwanted signals.
Power Amplifier (PA)
It fulfils power amplification in both UL and DL branches.
Diplexer (DPX):
The DPX located towards the DT and MT connections permits the uplink and downlink signals to share a
common antenna.
Low Noise Amplifier (LNA) –GSM unit only:
One Low Noise Amplifier (LNA) is installed in each UL/DL branch. The repeater UL/DL ATT value
corresponds individual to UL/DL gain.

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Main Control Unit (MCU):
The MCU is used to monitor and control the operation of the repeater and provides the communication
interface for remote control and indicator. LED indicators (H1~H3 or L1~L4) indicate the respective
operation status. There are two MCUs in the RD-7843, one for GSM unit and another for WCDMA unit.
Power Supply Unit (PSU):
The PSU converts the input voltage into a stable DC to provide power to the functional modules.
Distribution Board:
Each distribution board serves as a distributor for power and internal communication within the equipment.
On the distribution board located the following connections: connectivity to function modules, MCU, RS232
for local control.
Wireless Modem:
Located in the GSM unit, the wireless modem is mounted adjacent to the MCU. This unit is used by both the
WCDMA and GSM units. It has connections for RF, data and power. On the wireless modem, there is an
indicator LED to show the modem status. The wireless modem is used for remote control and monitors, and
for alarm transmission from the repeater back to the OMC.
Li-ion Battery:
Li-ion battery-pack is enclosed within its plastic cover and provides back-up supply to each MCU for up to
three hours in the event of mains failure.
Surge Protector:
Located within the GSM unit, the surge protector is mounted next to the PSU. It is connected to the PSU of
both WCDMA and GSM unit. Within it there are three connections: 220V VAC Live, Neutral and Ground.
This provides protection to the PSU. It is assumed that the antenna system will have ample lightning
protection themselves. On the top of each surge protector is a little window, beneath which is a coloured
indicator. ‘Green’ indicates protection is available, and in the event of a fault, the colour will turn to ‘Black’.
When this occurs, the surge protector has to be replaced. When the equipment is DC powered, no surge
protector is required.
2.4 KITS OF PARTS
Product Identifier Description Quantity
R-9122C8-5140/1 Mounting rack (kit) 1
M10 x 10 Masonry bolt for wall mounting 8
M10 x 85 x 110 U bolt for pole mounting 2
5.5 mm Alley key 1
Label “RS-200” Key to enclosure 2
R-9133C/R-9122AC RS-232 cable 1
5A Replacement fuse for AC PSU 2
6.3A Replacement fuse for AC PSU 2
RD-7843 QI 1-0-0 This manual
OMT V3.20
OMT V2.10 OMT software on CD-Rom
1CD
Table 1: Kit of parts
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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 from the equipment. It also covers activities that require the use of
force or effort, such as pulling a lever, or operating power tools.
Where some of the abovementioned activities are required, the equipment must be handled with care to
avoid being damaged
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.

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3.2 SITE PLANNING CONSIDERATIONS
Site Considerations
Outdoor equipment are designed to be waterproof, rainproof, and with snow protection. Temporary
protection should be taken when the equipment enclosure is opened for installation or maintenance in an
outdoor environment. The equipment must not be opened for installation or maintenance in bad weather (e.g.
gale, storm rainfall, extreme temperatures and high humidity).
Installation Location
Mounting surface shall be capable of supporting the weight of the equipment.
In order to avoid electromagnetic interference, a proper mounting location must be selected to minimize
interference from electromagnetic sources such as large electrical equipment.
Environmental
Humidity has an adverse effect on the reliability of the equipment. It is recommended to install the equipment
in locations having stable temperature and unrestricted air-flow.
The installation location for the product should be well ventilated. The equipment has been designed to
operate at the temperature range and humidity level as stated in the product specifications in the datasheet.
Direct sun light exposure to the equipment should be avoided. Provide additional shelter if necessary.
Powering
The power supply unit (PSU) provides power to all modules within the equipment. Depending on the product
variant, it is recommended that the PSU operates on a dedicated circuit breaker or fused circuit.
Grounding Requirement
Verify that the equipment has been well grounded. This includes antennas and all cables connected to the
system. Ensure lightning protection for the antennas is properly grounded.
Cable Routing
Depending on equipment configuration, a variety of types of cables are required. Where applicable, ensure
cables are properly routed and secured so that they are not damaged.
Manual Handling
During transportation and installation, take necessary handling precautions to avoid potential physical injury
to the installation personnel and the equipment.

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3.2.1 REPEATER INSTALLATION CHECKLIST
Installation Location Requirement Considerations
Working space available Ample space on mounting pole or wall surface
Recommended space: 800mm x 800 mm x 800mm
There are two power supply options at
each installation location
Power cord length is about 3m, use a dedicated AC breaker or
fuse circuit, and with good access to an earth point.
220VAC power: 176~264V 47/63Hz
110VAC power: 85~135V 45/65Hz
EMC and interference Do not locate near large transformers or motors that may cause
electromagnetic interference.
Maintain distance from enclosure to
DT, MT antennas Reduce of signal loss in feeder cable
Suitable operating environment -33°C to + 55°C and maximum 95% relative humidity
Table 2: Repeater installation checklist
3.2.2 ANTENNA INSTALLATION CHECKLIST
Installation Location Requirement Consideration
Locate donor antenna in a site to receive the
maximum signals from the desired BTS and to shield
the other signals at the same time.
Field intensity of receiving site: Typical mobile phone
Test field intensity >= -70dBm
Locate the mobile antenna in the center of signal
coverage area
Isolation of donor antenna and mobile antenna ( I )
must be larger than the maximum gain of the
repeater in operation
I > Gmax + 15dB
Table 3: Antenna installation checklist
3.2.3 CABLE REQUIREMENT
Cable Name Interface Purpose label
coaxial cable N-N Connect donor antenna to DT port of
the equipment.
coaxial cable N-N Connect mobile antenna to MT port of
the equipment.
RS-232 cable 9-pin D-type Realize local connection. “9122” mark
Conversion cable (optional) 7-pin CPC
Conversion cable to be connected
with RS-232 cable for local
commissioning
Table 4: Cable requirement

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3.3 INSTALLATION PROCEDURES
3.3.1 GOODS INWARDS INSPECTION
zVerify the number of packages received against the packing list.
zCheck all packages for external damage; report any external damage to the shipping courier. If there is
damage, a shipping agent should be present before unpacking and inspecting the contents because
damage during transit is the responsibility of the agent.
zOpen and check each package against the packing list. If any items are missing, contact Comba.
zDo not remove items from anti-static packing until ready for installation. If damage is discovered at the
time of installation, contact the shipping agent.
3.3.2 TOOLS
Refer to Appendix A for a full list of the recommended tools required for installation.
3.3.3 PREPARATION
Repeater:
zMounting surface or pole capable of support equipment weight: <51kg.
zPower outlet within 3m for VAC power supply or within about 1.5m with CSA of 2.5mm ² for VDC power
supply.
zTerminate unused antenna ports with a 50 ohm terminator.
zEarthing point/Safety ground within about 3m.
Antenna:
zAntenna installation is covered by their respective manuals. Take normal precautions when preparing
and handling feeder cables to ensure they are not damaged.

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3.3.4 MOUNTING RACK DIMENSION
The following figure shows the dimension of mounting rack, which is used for mounting the equipment to
either a wall or on a pole.
400
200
85
14
465
Figure 4: Mounting rack dimension
The mounting rack is pre-installed with the equipment during shipment. Follow the following steps to
separate the mounting rack from the equipment before commencing wall or pole mounting:
1. Unlock the enclosure door and use Allen key to remove all hex socket bolts (M8x80mm) at the corners
of the enclosure to open the door.
2. Use Allen key to unscrew both recessed hex socket bolts (M8x80mm) at the lower corners of the
enclosure to remove the mounting rack from the equipment. .