Comba Telecom RF-9122 Technical Document

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 1
ENU Status : 1-0-0
RF-9122 GSM900-GSM1800
FREQUENCY-SHIFTING REPEATER
EQUIPMENT MANUAL
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:
International Documentation Centre
Comba Telecom
This is an unpublished work the copyright in which vests in Comba International ("Comba").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.

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 2
ENU Status : 1-0-0
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
2EQUIPMENT DESCRIPTION..............................................................................................13
2.1 GENERAL............................................................................................................................13
2.2 SYSTEM DIAGRAM ............................................................................................................15
2.3 EQUIPMENT LAYOUT........................................................................................................16
2.4 MANUFACTURING ENTITIES............................................................................................18
2.5 KIT OF PARTS ....................................................................................................................19
2.6 TECHNICAL SPECIFICATIONS .........................................................................................20
2.6.1 RF SPECIFICATONS ..........................................................................................................20
2.6.2 POWER, MECHANICAL AND ENVIRONMENTAL SPECIFICATIONS .............................21
2.6.3 OPERATION & MAINTENANCE.........................................................................................22
3INSTALLATION ...................................................................................................................23
3.1 WARNINGS AND ALERTS .................................................................................................23
3.2 SITE PLANNING CONSIDERATIONS................................................................................24
3.2.1 REPEATER INSTALLATION CHECKLIST .........................................................................25
3.2.2 ANTENNA INSTALLATION CONSIDERATION..................................................................25
3.3 INSTALLATION PROCEDURES.........................................................................................26
3.3.1 GOODS INWARDS INSPECTION ......................................................................................26
3.3.2 TOOLS.................................................................................................................................26
3.3.3 PREPARATION ...................................................................................................................26
3.3.4 WALL MOUNTING OPTION ...............................................................................................27
3.3.5 POLE MOUNTING DETAILS ..............................................................................................29
3.3.6 DRIP-LOOP .........................................................................................................................29
3.3.7 EQUIPMENT CONNECTIONS............................................................................................29
4COMMISSIONING...............................................................................................................31
4.1 MCU LED INDICATORS .....................................................................................................31
4.2 EQUIPMENT POWER-UP ..................................................................................................31
4.3 OMT .....................................................................................................................................32
4.4 NON-VOLATILE MEMORY .................................................................................................33
4.5 HELP MENU........................................................................................................................33
4.5.1 OMT SOFTWARE VERSION ..............................................................................................34
4.5.2 OMT SOFTWARE INSTALLATION.....................................................................................34
4.5.3 PREPARATION FOR REMOTE CONNECTION OF OMT USING WIRELESS
MODEM ...............................................................................................................................34
4.5.4 CONNECTING OMT TO EQUIPMENT...............................................................................35
4.6 LOCAL COMMISSIONING..................................................................................................37
4.6.1 DESCRIPTION OF PARAMETERS ....................................................................................38
4.7 COMMISSIONING PROCEDURES ....................................................................................43
4.7.1 MASTER-UNIT COMMISSIONING .....................................................................................43
4.7.2 REMOTE-UNIT COMMISSIONING.....................................................................................44
4.8 REMOTE MONITORING USING OMC...............................................................................45

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 3
ENU Status : 1-0-0
5OPERATION........................................................................................................................46
6MAINTENANCE...................................................................................................................47
6.1 REFERENCE FREQUENCY CALIBRATION......................................................................47
7APPENDICES......................................................................................................................48
7.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE .................................48
7.2 APPENDIX B: REPEATER’S INTERFERENCE TO BTS ...................................................49
7.3 APPENDIX C: OMT INSTALLATION ..................................................................................50
7.4 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) FORM .............................52

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 4
ENU Status : 1-0-0
0.3 INDEX TO FIGURES AND TABLES
Fig 1: Front, side and bottom view of Direct Coupling Master Unit, Wireless Coupling Master Unit
and Remote Units (IC/EC) enclosure.......................................................................................14
Fig 2: System diagram ......................................................................................................................15
Fig 3: Direct Coupling Master Unit internal layout .............................................................................16
Fig 4: Remote Unit (IC/EC) internal layout.........................................................................................17
Fig 5: Mounting rack dimension .........................................................................................................27
Fig 6: Wall mounting overview ...........................................................................................................28
Fig 7: Pole mounting overview ...........................................................................................................29
Fig 8: Location of MCU and LED .......................................................................................................31
Fig 9: OMT screenshot - main screen................................................................................................32
Fig 10: Wireless modem ....................................................................................................................34
Fig 11: OMT screenshot - communication setup ...............................................................................35
Fig 12: OMT screenshot - configuration window ...............................................................................37
Table 1: EquipmentKOP .....................................................................................................................19
Table 2: RF specifications...................................................................................................................20
Table 3: Power, Mechanical and environmental specifications ..........................................................21
Table 4: Management features ...........................................................................................................22
Table 5: Repeater Installation checklist ..............................................................................................25
Table 6: Antenna installation checklist................................................................................................25
Table 7: MCU LED ..............................................................................................................................31
Table 8: Management - Network Parameters.....................................................................................38
Table 9: Management - RF parameters..............................................................................................40
Table 10: Management - Alarm list .....................................................................................................41
Table 11: Commissioning procedures for master-unit .......................................................................43
Table 12: Direct Coupling Master Unit Uplink ATT and Uplink Noise Level.......................................44
Table 13: Remote Unit Uplink ATT and Uplink Noise Level ...............................................................44
Table 14: Alarms diagnosis.................................................................................................................46

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 5
ENU Status : 1-0-0
0.4 HISTORY
Change No. ENU Details Of Change
1
2
1-0-0
1-0-0
Created on 15th July 2005
Doc. revised with the product name changed for CE Certification
on 17th August, 2005

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 6
ENU Status : 1-0-0
0.5 ISSUE CONTROL
Date 15
July
05
17
Aug
05
Section
All all all

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 7
ENU Status : 1-0-0
0.6 REFERENCES
0.6.1 S-9180J datasheet Issue B2,
released 13-May-2005
GSM–DCS Frequency Shifting Repeater,
Product Manager: Steven Zhou
0.6.2 S-9180J Chinese user manual, V1.1
Released in 2004-11
S-9180J Point-to-Multipoint Frequency-
Shifting Repeater

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 8
ENU Status : 1-0-0
0.7 GLOSSARY OF TERMS
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 Downlink
DPX Duplexer
DT Donor Terminal
EEPROM Electrically Erasable Programmable Read Only Memory
FS Frequency Selector
FSA Frequency Selector Amplifier
GSM Group Special Mobile (Also known as Global System for Mobile
Communication)
Hz Hertz
ID Identification
LNA Low Noise Amplifier
MCU Main Control Unit
MHz Megahertz
MT Mobile Terminal
MTBF Mean Time Between Failures
NC Normally Closed
NF Noise Figure
NO Normally Open
OMC Operation & Maintenance Center
OMT Operation & Maintenance Terminal
PA Power Amplifier
PLL Phase Locked Loop
PSU Power Supply Unit
RF Radio Frequency
SMA Sub-Miniature A Connector
UL Uplink
VAC Volts Alternating Current
VSWR Voltage Standing Wave Ratio

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 9
ENU Status : 1-0-0
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.

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 10
ENU Status : 1-0-0
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 is in 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 SYSTEMS, LTD.
Hong Kong Office
Address: Room 1503-10 Delta House, 3 On Yiu Street, Shatin, Hong Kong.
Tel: + 852 2636 6861
Fax: + 852 2637 0966
Email: [email protected]
Singapore office
Address: 865 Mountbatten Road #05-43, Katong Shopping Centre, Singapore 449408
Tel: + 65 6345 4908
Fax: + 65 6345 1186
Email: [email protected]
Sweden Office
Address: Comba Telecom Systems AB, Gustavslundsvagen 147, S- 167 51 Bromma,
Stockholm, Sweden
Tel: [phone]
Fax: [phone]
Email: [email protected]
China R&D and Manufacturing Base
Address: No.6, Jinbi Road, Guangzhou Economic and Technological Development
District, Guangzhou, China.
Tel: + 86 20 8222 5788
Fax: + 86 20 8222 6121
Email: [email protected]

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 11
ENU Status : 1-0-0
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 1-0-0
Page number
Paragraph number
Line number
Figure number
Details of inaccuracies
Other comments
Contact points:
International Documentation Centre
E-mail: [email protected]
FAX: [phone]
End of section

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 12
ENU Status : 1-0-0
1 GENERAL INFORMATION
The RF-9122 family of repeater system implements point-to-multipoint architecture through using a
frequency-shifting technique. Each consists of master unit and remote unit. Their use is to overcome
the antenna isolation problem in conventional repeater system. The variants of RF-9122 is
presented in the table below:
Model Number Product Description
RF-9122 GSM900-GSM1800 Frequency Shifting Repeater
RF-9122 GSM900-GSM900 Frequency Shifting Repeater
RF-9122 GSM900-CDMA800 Frequency Shifting Repeater
RF-9122 GSM1800-GSM1800 Frequency Shifting Repeater
This document is applicable for RF-922 GSM900-GSM1800 Frequency Shifting Repeater
(hereinafter called “system”). The master-unit is coupled either directly or wirelessly to the BTS, and
the master-unit can be connected with a pre-defined number of remote units (IC/EC).
This system is applicable in situation with restricted installation conditions (e.g. insufficient optical
fiber resources) or in location where antenna isolation is difficult to achieve.
Through frequency translation from GSM900 to GSM1800 bands, this system eliminates donor
antenna isolation problem and consequently permits flexible network design.
The chassis can be installed to a wall or on a pole according to the field situation. Donor antenna
and mobile antenna are connected to the repeater with RF coaxial cables.
Characteristics of this equipment are as follows:
zEliminate donor antenna isolation problem through frequency translation to the GSM1800 band.
zTwo carriers, independent power amplifier provides effective amplification of signal source.
zHigh output power of 10W.
zTemperature compensation to reduce the effect on system performance due to variation in
temperature.
zAvailable in standard P-GSM900 or E-GSM900 bands.
zLocal control and monitoring function: operating status and parameters can be set or monitored
by PC. It also includes testing the received BS signal field intensity to accomplish the donor
antenna debug and checking output power of uplink and downlink.
zOperation Maintenance Center (OMC): users can use wire line modem or GSM modem to
realize setting and inquiry of repeater working parameters and communication configuration. If
alarm is generated by the remote equipment, it will dial up to OMC automatically or send SMS
to the handset of maintainer.
zChassis is designed for all-weather outdoor operation - waterproof, damp-proof and omni-
sealed.
zBackup battery: backup Li-ion battery for MCU in repeater is used to ensure the alarm
message could be send to maintenance personnel effectively in case of power down. Optional
backup battery for the remote-unit of the repeater can be deployed to guarantee the device to
work normally in area where power supply is unstable.
End of section

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 13
ENU Status : 1-0-0
2 EQUIPMENT DESCRIPTION
2.1 GENERAL
The RF-9122 GSM900-GSM1800 Frequency Shifting Repeater consists of Direct Coupling Master
Unit, wireless coupling master unit and remote units (IC/EC). Each is implemented around the
common RF-9122 GSM900-GSM1800 Frequency Shifting Repeater that comprises of the following:
Uplink/Downlink Frequency Selective Module selects the required channel frequency and
translates it to corresponding frequency.
UL/DL Power Amplifier Module with ALC function is used to amplify the UL/DL signal.
LNA (Low Noise Amplifier) with adjustable gain is used to pre-amplify the signal. Its UL/DL ATT
value matches the gain of the corresponding UL/DL LNA.
Duplexers (DPX) of the same specifications are used in BS and MS circuits that combine or divide
the uplink and downlink signals.
Main Control Unit (MCU) is used to control and monitor the operation parameters of the repeater
and provides telecommunication interface for remote control.
Power Supply Unit (PSU) converts the input 220VAC into stable DC to supply power to FSA, MCU
and to charge the internal Li-ion battery. (-48VDC and +24VDC power supply are available as
installed options)
Li-ion Battery will supply power to MCU for up to three hours in the event of mains failure.

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 14
ENU Status : 1-0-0
Fig 1: Front, side and bottom view of Direct Coupling Master Unit, Wireless Coupling Master Unit
and Remote Units (IC/EC) enclosure

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 15
ENU Status : 1-0-0
2.2 SYSTEM DIAGRAM
Fig 2: System diagram
Frequency shifting system consists of frequency-shifting master-unit and frequency-shifting remote-
unit.
The master-unit receives GSM900 donor signal via direct coupling or wireless coupling, and
translates it to a GSM1800 link frequency for transmission to the remote-unit(IC/EC).
Point to multipoint operation is supported by one master-unit supporting multiple remote-units.
The mapping of channels is user-defined through the OMT software.
Through frequency translation from GSM900 to GSM1800 band, this system eliminates donor
antenna isolation problem and consequently permits flexible network design.
The chassis can be installed to a wall or on a pole according to the field situation. Donor antenna
and mobile antenna are connected to the repeater with RF coaxial cables.

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 16
ENU Status : 1-0-0
2.3 EQUIPMENT LAYOUT
Fig 3: Direct Coupling Master Unit internal layout
Note: for Wireless Coupling Master Unit, the ATT Module is replaced by a LNA.

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 17
ENU Status : 1-0-0
Fig 4: Remote Unit (IC/EC) internal layout

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 18
ENU Status : 1-0-0
2.4 MANUFACTURING ENTITIES
This equipment is equipped of the following standard modules identified as below

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 19
ENU Status : 1-0-0
2.5 KIT OF PARTS
For each equipment, the following are shipped:
Item Description Product Identifier Quantity Note
1 Mounting Bracket R-9122C8-5140/1 1
2 Masonry Bolt M10×110 8
3 U Bolt M10×85×110 2
4 Allen Key 5.5mm 1
5 RS-232 Cable R-9122C/R-3122AC 1 Marked “9122”
6 Key 2
7 Fuse Delay Safety 6.3A 2
8 OMT Software V1.04 1 CD-ROM
9 Omnidirectional Antenna OOA-360/V02-SD 1
10 This Manual RF-9122T18 QE 1-0-0 1
Table 1: EquipmentKOP

EQUIPMENT MANUAL FOR RF-9122 GSM900-GSM1800 FSR
RF-9122T18 QE Copyright - refer to title page Page 20
ENU Status : 1-0-0
2.6 TECHNICAL SPECIFICATIONS
2.6.1 RF SPECIFICATONS
Working Frequency, Uplink – [MHz]
- P-GSM900
- E-GSM900
890 – 915
880 - 915
Working Frequency, Downlink – [MHz]
- P-GSM900
- E-GSM900
935 – 960
925 - 960
Link Frequency, Uplink – [MHz] 1710- 1785
Link Frequency, Downlink – [MHz] 1805 - 1880
Number of Channels 2
Maximum Gain – [dB]
- Direct Coupling Master Unit
- Wireless Coupling Master Unit
- Remote Unit (IC)
- Remote Unit (EC)
40 ±2
105 ±2
105 ±2
108 ±2
Gain Adjustment Range – [dB] 30 ±1.0 (1dB step)
Pass Band Ripple, p-p – [dB]
within any 15MHz bandwidth
≤3
Output Power per Ch, DL - [dBm]
- Direct Coupling Master Unit
- Wireless Coupling Master Unit
- Remote Unit (IC)
- Remote Unit (EC)
40 ±1
40 ±1
40 ±1
43 ±1
Output Power per Ch, UL - [dBm]
- Direct Coupling Main Unit (IC)
- Wireless Coupling Master Unit, 2 Ch
- Remote Unit
-10 ±1
33 ±1
40 ±1
Spurious and Intermodulation – [dBm]
- 9kHz - 1GHz
- 1 - 12.75 GHz
≤-36
≤-30
Noise Figure, @Max. Gain – [dB] ≤5.0 (typ.4)
Frequency Error – [Hz] ≤±45
Group Delay – [µsec]
- Master + Remote Units ≤20
Minimum Channel Spacing – [kHz]
- within working band or link band
≥600
Absolute Max. RF Input Power – [dBm] +10
VSWR ≤1.5 (typ. 1.4)
Impedance – [Ω] 50
Table 2: RF specifications