COMBA SP-1910 User manual

INSTALLATION GUIDE FOR SP-1910
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SP-1910
GSM1900 BANDWIDTH ADJUSTABLE
PICO 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This is an unpublished work the copyright in which vests in Comba Telecom Ltd. ("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.

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0.2 CONTENTS
Section Page
0.2 CONTENTS ........................................................................................................................... 2
0.3 INDEX TO FIGURES AND TABLES ..................................................................................... 3
0.4 HISTORY............................................................................................................................... 4
0.5 ISSUE CONTROL ................................................................................................................. 5
0.6 REFERENCES ......................................................................................................................6
0.7 GLOSSARY OF TERMS ....................................................................................................... 7
0.8 SAFETY NOTICES AND ADMONISHMENTS...................................................................... 8
0.9 SERVICING POLICY AND RETURN OF EQUIPMENT ....................................................... 9
0.10 READERS COMMENTS ..................................................................................................... 10
1GENERAL INFORMATION ................................................................................................. 11
2EQUIPMENT DESCRIPTION.............................................................................................. 12
2.1 THE SP-1910 FUNCTIONAL DIAGRAM ............................................................................ 12
2.2 EQUIPMENT LAYOUT........................................................................................................ 13
2.3 EQUIPMENT CONSTITUTION ........................................................................................... 13
2.4 KITS OF PARTS..................................................................................................................14
2.5 GENERAL APPLICATION................................................................................................... 15
2.5.1 USING BUILT-IN ANTENNA ............................................................................................... 15
2.5.2 USING EXTERNAL ANTENNA (OPTIONAL) ..................................................................... 15
3INSTALLATION ...................................................................................................................17
3.1 WARNINGS AND ALERTS ................................................................................................. 17
3.2 SITE PLANNING CONSIDERATIONS................................................................................ 18
3.2.1 INSTALLATION CHECKLIST.............................................................................................. 19
3.3 INSTALLATION PROCEDURES ........................................................................................ 19
3.3.1 GOODS INWARDS INSPECTION ...................................................................................... 19
3.3.2 TOOLS................................................................................................................................. 19
3.3.3 WALL MOUNTING .............................................................................................................. 20
3.3.4 DRIP-LOOP......................................................................................................................... 20
3.4 EQUIPMENT CONNECTIONS ........................................................................................... 21
4COMMISSIONING............................................................................................................... 22
4.1 MCU LED INDICATORS ..................................................................................................... 22
4.2 CONTROL PANEL .............................................................................................................. 23
4.2.1 DIP SWITCHES................................................................................................................... 23
4.2.2 LCD DISPLAY .....................................................................................................................23
4.3 PROGRAMMING THE SYSTEM ........................................................................................ 24
4.3.1 EXAMPLES ......................................................................................................................... 24
4.4 COMMISSIONING............................................................................................................... 25
4.4.1 PRE-COMMISSIONING TASKS ......................................................................................... 25
4.4.2 SYSTEM COMMISSIONING PROCEDURES .................................................................... 26
4.5 MCU RESET........................................................................................................................ 27
5SYSTEM MAINTENANCE................................................................................................... 28
6APPENDICES......................................................................................................................29
6.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE ................................. 29
6.2 APPENDIX B: RMA (RETURN MATERIAL AUTHORIZATION) FORM ............................. 30

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0.3 INDEX TO FIGURES AND TABLES
Figure 1: Top, front and side views of the enclosure................................................................................. 11
Figure 2: SP-1910 functional diagram (built-in antenna used) .................................................................. 12
Figure 3: Equipment internal layout ........................................................................................................... 13
Figure 4: Application with built-in antenna ................................................................................................. 15
Figure 5: Application with external antennas ............................................................................................. 15
Figure 6: Built-in antenna connection (control panel removed for clarity) ................................................. 16
Figure 7: Jumper cable installed (built-in antenna and control panel removed for clarity) ........................ 16
Figure 8: Mounting arrangement at the rear of the unit ............................................................................. 20
Figure 9: Alignment of mounting screws.................................................................................................... 20
Figure 10: Equipment connectors .............................................................................................................. 21
Figure 11: Location of LEDs ...................................................................................................................... 22
Figure 12: Control panel layout.................................................................................................................. 23
Figure 13: DIP switch status on the control panel (ON and OFF) ............................................................. 23
Figure 14: MCU overview .......................................................................................................................... 27
Table 1: SP-1910 KOP............................................................................................................................... 14
Table 2: LEDs colour and indication .......................................................................................................... 22
Table 3: Numbered function and value displayed on the LCD display...................................................... 24
Table 4: Examples of parameters setting .................................................................................................. 24
Table 5: Default value of each parameter.................................................................................................. 25
Table 6: System commissioning procedures ............................................................................................. 26

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0.4 HISTORY
Change No. ENU Details Of Change
1 1-0-0 Document created and released on Sep 18, 2007
2 1-0-1 Updated MCU information

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0.5 ISSUE CONTROL
Date 18
Sep
07
03
Dec
07
Section
All All All

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0.6 REFERENCES
0.6.1 SP-1910-1001YH Document released in Aug 2007.

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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
dB Decibel
dBm Decibels relative to 1 milliwatt
DL DL
DPX Duplexer
DT Donor Terminal
EEPROM Electrically Erasable Programmable Read Only Memory
FS Frequency Selector
FSA Frequency Selector Amplifier
Hz Hertz
ID Identification
LNA Low Noise Amplifier
MCU Main Control Unit
MHz Megahertz
MS Mobile Subscriber
MT Mobile Terminal
MTBF Mean Time Between Failures
NF Noise Figure
PA Power Amplifier
PLL Phase Locked Loop
PSU Power Supply Unit
RF Radio Frequency
SAWF Surface Acoustic Wave Filter
SMA Sub-Miniature A Connector (coaxial cable connector type)
UL UL
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 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:
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 and prompt after sales service 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 B. 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: [phone]
Fax: [phone]
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]
Email: [email protected]
India Office
Address: Suit No. 202 Chintels Business Centre, A-11 Kailash Colony, New Delhi 110048, India
Tel: [phone] / 8
Fax: [phone]
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: Shenzhou Road, Guangzhou Science City, Guangzhou, China
Tel: [phone]
Fax: [phone]
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
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

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1 GENERAL INFORMATION
The SP-1910 GSM1900 Band Adjustable Pico Repeater (Hereinafter called “system”) is used in indoor
locations where small-scale signal coverage is required, e.g., hotels, department stores and shopping
malls, underground parking lots, convention centres, arenas, office, meeting room, etc.
SP-1910 is designed for indoor operation in the GSM1900 band. Its band-specific linear amplifier
effectively amplifies the desired BTS carriers and IF filtering provides superior out-of-band rejection.
Characteristics of the SP-1910 repeater are as follows:
•Low noise amplifier improves uplink system noise figure for better voice quality and reduced dropped
call.
•With Built-in antenna and option for connecting external antenna.
•15dBm Uplink and Downlink output power.
•System gain and operating frequency are manually adjustable via the control panel.
•Temperature compensated for stable operation.
•System commissioning can be performed without using any additional equipment.
•The cover can be removed without tools.
•Small size, light weight and easy to install.
Refer to the following figure for the the front, side and back views of the SP-1910:
150
235
45
68
Figure 1: Top, front and side views of the enclosure
End of Section

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2 EQUIPMENT DESCRIPTION
2.1 THE SP-1910 FUNCTIONAL DIAGRAM
Figure 2: SP-1910 functional diagram (built-in antenna used)
As shown in the above figure, in the downlink direction, BTS signals are received by donor antenna
(connected with DT port and located outdoor). After the duplexer, the signals are sent to LNA for pre-
amplification, to DL Band Module afterwards to achieve the required output power and reject the
unwanted signal. The signals arrived at the duplexer are sent to service antenna (connected with MT port
and located indoor) for area coverage.
In the uplink direction, the signals from subscriber handsets are received through service antenna. After
the duplexer the signals are sent to LNA and UL Band Module. After the duplexer, the signals are sent to
BTS through donor antenna.
The mobile antenna can be either the built-in antenna (default) or an external antenna (optional)
according to network requirements.

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2.2 EQUIPMENT LAYOUT
With the front cover removed, the following are seen.
MT
DT
Latch
Antenna Port
Conversion Port
Integrated RF Module
Built-in Antenna
Control Panel
RSSI LED (high)
RSSI LED (medium)
RSSI LED (low)
RUN LED
ALARM LED
Figure 3: Equipment internal layout
2.3 EQUIPMENT CONSTITUTION
The SP-1910 system consists of the following:
Removeable front cover: The equipment is also shipped with a small cover to protect the LEDs (RSSI,
RUN and ALARM). A simple latch keeps the cover securely in place.
Integrated RF Module: Includes Main Control Unit and UL/DL LNA. It is used both to amplify the UL/DL
signals and effectively reject the undesired signals, and to control and monitor the working parameters of
the repeater.
Built-in antenna (default): Transmits DL signals and receives UL signals. It is pre-connected to the ANT
Port ex-factory.
Control Panel: It is used to set and display the working parameters of the equipment. A two line LCD
display provides the feedback of frequency and ATT parameters, and a number of switches to program
the frequency and ATT parameters and control the LCD display.
External PSU: It is connected to the equipment via the “DC” port”. It converts the mains voltage into
stable 6VDC.

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2.4 KITS OF PARTS
For each SP-1910, the following are shipped:
Product Identifier Description Quantity
ST4x30 Self - tapping Screw 4
Φ6 Wall Plug 4
RS-211PICO SMA-SMA jumper cable for use with external antenna 1
GFP241DA-0638 DC Power Supply Unit (AC-DC power adapter) 1
SP-1910 QI 1-0-0 This manual 1
Table 1: SP-1910 KOP

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2.5 GENERAL APPLICATION
2.5.1 USING BUILT-IN ANTENNA
Built-in antenna is applicable for small-scale rooms. This system is supplied with Built-in antenna already
connected, which means the input signals can be transmitted without using external mobile antenna.
Refer to the figure below:
the SP-1910
Built-in
Antenna
BTS
DT
Mobile
Phone
Figure 4: Application with built-in antenna
2.5.2 USING EXTERNAL ANTENNA (OPTIONAL)
For extended coverage, external antenna(s) can be used as per the coverage requirements. External
antenna is applicable for multi-room coverage.
In external antenna application, a power splitter and multiple external antennas are required. In addition,
a simple jumper cable is required to be installed within the equipment (see Figure 7). The following figure
is an illustration for external antenna application.
Figure 5: Application with external antennas

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To realize extended coverage using external antennas, users need to make some adjustment to the
equipment internal structure. The preparation for use with external antenna is desribed as below:
•Remove the front cover by disengaging the latch located at the bottom of the equipment.
•Disconnect the built-in antenna from the “ANT Port”.
•Carefully install the jumper cable to bridge “ANT Port” with “Conversion Port”, ensure connections
are tightened sufficiently.
•Position the pig-tail of the built-in antenna so that it does not short circuit any electronics.
•Connect the external antenna with the equipment via the “MT Port” located on the top.
•Re-install the front cover.
Figure 6: Built-in antenna connection (control panel removed for clarity)
Figure 7: Jumper cable installed (built-in antenna and control panel removed for clarity)

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3 INSTALLATION
3.1 WARNINGS AND ALERTS
Radio Frequency energies
There may be situations, particularly the workplace environments adjacent to 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 as to prevent as far as reasonably practicable
danger. Any activity, such as installation, operation and maintenance, on or near the equipment must be
as far as reasonably free from danger.
Where there is a risk of damage to electrical systems due to adverse weather, extreme temperatures,
wet, corrosive or dirty conditions, flammable or explosive atmosphere, then the system must be suitably
installed to avoid such a danger.
Protective Earthing
Equipment provided for the purpose of protecting individuals from electrical risk must be properly used
and maintained.
Handling Precautions
Precautions should be taken in equipment handling activities including lifting, lowering, pushing, pulling,
carrying, moving or holding, or the activities to restrain an object, animal or a person, or the activities
when extra efforts are needed 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
The repeater is designed for indoor installation and operation.
Installation location
Mounting surface shall be capable of supporting weight of the equipment. Physical location should be
able to achieve signal strength of better than -70dBm from the BTS antenna, and the MT antennas
should provide the required coverage.
Antenna separation
For optimal operation, the physical separation of the MT and DT antennas should satisfy the condition for
I > GMAX +10dB, where I represents isolation should be more than 75dBm between MT and DT ports.
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 between -20C~+40C and humidity less than 85%.
Powering (AC mains supply)
The external power supply unit provides power to all modules within the equipment. The equipment
accepts DC mains input via an external PSU.
In order to avoid electromagnetic interference, select the SP-1910 mounting location to minimize
interference from electromagnetic sources such as: large electricity powered equipment.
Grounding requirement
Verify the equipment has been well grounded, this includes antennas and all cables connected. Ensure
lightning protection for antennas is properly grounded.
Cable routing
The RF cables for the SP-1910 are terminated with connectors; other cables connect the equipment with
the external PSU. Ensure cables are supported where necessary 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 related personnel and/or damages to the equipment.

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3.2.1 INSTALLATION CHECKLIST
zWorking space available for installation and maintenance for each mounting arrangement. Ensure
unrestricted airflow.
zEnsure earthing point is within reach of the ground wire.
zWhere appropriate, ensure unused RF connectors are terminated.
zEnsure a power source is within reach of the power cord and the power source has sufficient
capacity.
zDo not locate the equipment near large transformers or motors that may cause electromagnetic
interference.
zReduce signal loss in feeder cable by minimizing the length and number of RF connections.
zEnsure VSWR of antennas system < 2.0:1.
zEnsure equipment will be operated within the stated environment (refer to datasheet).
zObserve handling of all cables to prevent damage.
zDonor antenna should have a narrow beamwidth positioned in line-of-sight (LOS) to donor BTS site
so that the donor signal level is desired; maximum signal will damage the pico. This allows the use of
minimum gain to achieve the maximum DL output power. The UL gain is typically set lower than or
equal to the DL gain to minimize noise interference to the donor BTS.
zService antenna should be selected based on the type of service area, e.g., indoor antenna for
indoor application, and panel antenna for outdoor application. (external antenna application)
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 caused 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 antistatic packing until installation. If damage is discovered at the time of
installation, contact the shipping agent.
3.3.2 TOOLS
See Appendix A for a recommended list of tools required for installation and maintenance.

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3.3.3 WALL MOUNTING
zLocate and prepare two holes spaced apart by 45mm.
zDepending on the mounting surface, twoΦ6 wall plugs may be needed, insert and tighten two self-
tapping screws into the wall plugs, leave the screw heads protruding by about 5mm.
zRaise the enclosure and hook the mounting plate onto the screws to complete the installation.
Figure 8: Mounting arrangement at the rear of the unit
Enclosure
ST4x30 Screw
Wall
Wall Plug
Figure 9: Alignment of mounting screws
3.3.4 DRIP-LOOP
Comba recommends that every horizontal cable entry to the equipment forms a 'U' before its entry to the
equipment. Water on the cable will drip down at the bottom of the loop and will not accumulate at the
equipment connectors.