COMBA RX-8123 User manual

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 1
ENU Status : 1-0-1
USER 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:
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This is an unpublished work the copyright in which vests in Comba International ("Comba").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 a d 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.
RX-8123
GSM850MHZ DIGITAL CHANNEL
SELECTIVE REPEATER

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 2
ENU Status : 1-0-1
0.2 CONTENTS
Section Page
0.2CONTENTS........................................................................................................................... 2
0.3INDEX TO FIGURES AND TABLES ..................................................................................... 4
0.4HISTORY............................................................................................................................... 5
0.5GLOSSARY OF TERMS ....................................................................................................... 6
0.6SAFETY NOTICES AND ADMONISHMENTS...................................................................... 7
1GENERAL INFORMATION ................................................................................................... 8
2EQUIPMENT DESCRIPTION................................................................................................ 9
2.1SYSTEM DIAGRAM .............................................................................................................. 9
2.2EQUIPMENT LAYOUT........................................................................................................ 10
2.3EQUIPMENT CONSTITUTION ........................................................................................... 11
2.4KIT OF PARTS .................................................................................................................... 12
3INSTALLATION ................................................................................................................... 13
3.1WARNINGS AND ALERTS ................................................................................................. 13
3.2SITE PLANNING CONSIDERATIONS................................................................................ 14
3.3INSTALLATION PROCEDURES ........................................................................................ 15
3.3.1GOODS INWARDS INSPECTION ...................................................................................... 15
3.3.2TOOLS................................................................................................................................. 15
3.3.3PREPARATION...................................................................................................................15
3.3.4WALL MOUNTING .............................................................................................................. 16
3.3.5POLE MOUNTING OF MOUNTING RACK......................................................................... 17
3.3.6DRIP-LOOP......................................................................................................................... 17
3.4EQUIPMENT CONNECTORS ............................................................................................ 18
3.4.1CONNECTORS ...................................................................................................................18
3.4.2GROUNDING CONNECTION............................................................................................. 19
3.4.3LI-ION BATTERY CONNECTION ....................................................................................... 19
3.4.4RF CONNECTION............................................................................................................... 19
3.4.5EXTERNAL ALARM CONNECTION................................................................................... 19
3.4.6CONNECTION BETWEEN PC AND EQUIPMENT ............................................................ 20
3.4.7EXT ALARM CONNCETION............................................................................................... 20
4COMMISSIONING............................................................................................................... 21
4.1PRE-COMMISSIONING TASKS ......................................................................................... 21
4.2MCU LED INDICATORS ..................................................................................................... 21
4.3COMMISSIONING PROCEDURES .................................................................................... 22
5OMT..................................................................................................................................... 24
5.1LOCAL AND REMOTE CONNECTIONS TO OMT............................................................. 24
5.1.1LOCAL CONNECTION TO OMT ........................................................................................ 24
5.1.2REMOTE CONNECTION TO OMT..................................................................................... 25
5.2OMT CONFIGURATION ..................................................................................................... 25
5.3RF PARAMETER ................................................................................................................ 26
5.3.1SWITCH...............................................................................................................................26
5.3.2CHANNEL NO. .................................................................................................................... 27
5.3.3ATT ...................................................................................................................................... 27
5.3.4ALARM THRESHOLD ......................................................................................................... 28
5.3.5ALARM INFORMATION ...................................................................................................... 28
5.4PROPERTIES INFO............................................................................................................ 29
5.4.1EQUIPMENT ID................................................................................................................... 29
5.4.2COMM. CONFIG .................................................................................................................30

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 3
ENU Status : 1-0-1
6MAINTENANCE ..................................................................................................................31
7APPENDICES...................................................................................................................... 32
7.1APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE ................................. 32
7.2APPENDIX B: SERVICING POLICY AND RETURN OF EQUIPMENT ............................. 33
7.3APPENDIX C: RMA (RETURN MATERIAL AUTHORIZATION) FORM............................. 34

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 4
ENU Status : 1-0-1
0.3 INDEX TO FIGURES AND TABLES
Figure 1: RX-8123 System Diagram.............................................................................................................9
Figure 2: RX-8123 Internal Layout............................................................................................................. 10
Figure 3: Mounting Rack Overview............................................................................................................ 15
Figure 4: Wall Mounting ............................................................................................................................. 16
Figure 5: Pole Mounting Overview............................................................................................................. 17
Figure 6: Bottom Panel Interface Diagram ................................................................................................ 18
Figure 7: The Connection between Equipment and PC ............................................................................ 20
Figure 8: Connection Type......................................................................................................................... 24
Figure 9: Serial Port Configuration............................................................................................................. 24
Figure 10: Remote Connection .................................................................................................................. 25
Figure 11: OMT Main Window ................................................................................................................... 25
Figure 12: Switch ....................................................................................................................................... 26
Figure 13: Channel No............................................................................................................................... 27
Figure 14: Frequency Calculator................................................................................................................ 27
Figure 15: ATT ........................................................................................................................................... 27
Figure 16: Alarm Threshold ....................................................................................................................... 28
Figure 17: Master Alarm ............................................................................................................................ 28
Figure 18: External Alarm .......................................................................................................................... 29
Figure 19: Equipment ID ............................................................................................................................ 29
Figure 20: Com. Config.............................................................................................................................. 30
Table 1: Equipment Constitution................................................................................................................ 11
Table 2: Equipment KOP ........................................................................................................................... 12
Table 3: Cable Connection ........................................................................................................................ 14
Table 4: RX-8123 Connectors ................................................................................................................... 18

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 5
ENU Status : 1-0-1
0.4 HISTORY
Change No. ENU Details Of Change
1 1-0-0 RX-8123 user manual first created on 24 Mar 2010.
2 1-0-1 Revised the modem cable drawing, KOP, front panel drawing as
well as Thailand address in April 2011.

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 6
ENU Status : 1-0-1
0.5 GLOSSARY OF TERMS
ALC Automatic Level Control
ATT Attenuation
AFC Antenna Feedback Cancellation
BTS Base Transceiver Station
CSA Cross Sectional Area
dB Decibel
dBm Decibels relative to 1 milliwatt
DL Downlink
DPX Duplexer
DT Donor Terminal
E/O, O/E Electrical/Optical, Optical/Electrical
FSK Frequency Shift Keying
FOU Fiber Optical Unit
GSM Global Standard 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
NF Noise Figure
OMC Operation & Maintenance Center
OMT Operation & Maintenance Terminal
OP Optical Fiber
PA Power Amplifier
PLL Phase Locked Loop
PSU Power Supply Unit
RF Radio Frequency
RFU Radio Frequency Unit
RX Receive
SMA Sub-Miniature “A” Connector
SIU Slide-In-Unit
TX Transmit
UL Uplink
VAC Volts Alternating Current
VSWR Voltage Standing Wave Ratio
WDM Wavelength Division Multiplexer

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 7
ENU Status : 1-0-1
0.6 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:
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.
CAUTION: danger of explosion if battery is incorrectly replaced. Replace only with the same or
equivalent type.
End of Section

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 8
ENU Status : 1-0-1
1 GENERAL INFORMATION
The RX-8123 GSM850 digital channel selective repeater is designed for 850MHz network. It can wireless
transmit, two-way amplify GSM uplink and downlink signals and is designed for eliminating
communicational coverage blind spots. By using the new Comba AFC (Antenna Feedback Cancellation)
technique, the system isolation tolerance has been greatly improved: Imax>G-15dB, which was obliged
to be higher than G+15dB under conventional technique.
Characteristics of RX-8123 are as follows:
•Supports multiple carriers. Uplink and downlink with digital carrier selective frequency can efficiently
amplify BS signal.
•With AFC function
•Adopt high linear PA and ensure GSM signal efficiently being amplified.
•With out-of- band suppression and supports automatic gain temperature compensation function
which can maintain regular operation among working temperature.
•Local Operation and Maintenance Terminal (OMT): operating status and parameters can be set or
monitored by OMT PC locally. It can also check the downlink power and download the latest OMT
version.
•Operation Maintenance Center (OMC): system working parameters and communication configuration
can be set or inquired remotely through the build-in GSM modem. If alarm is generated, the
equipment will dial up to OMC automatically in the mode of SMS or GPRS.
•Build-in Li-ion battery ensures that alarm information can automatically report to OMC in case of
equipment power failure.
•Designed for all weather outdoor application – waterproof, damp-proof and Omni-sealed (IP65).
The following figure shows the enclosure of the RX-8123.
492
276
276
DT
POWER MODEM
ALARM
MT
228
372
Figure 1: Views of RX-8123 Enclosure
End of Section

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 9
ENU Status : 1-0-1
2 EQUIPMENT DESCRIPTION
2.1 SYSTEM DIAGRAM
Figure 1: RX-8123 System Diagram
As shown in the above figure, the downlink BS signals go through DT port to the system and then to
downlink by duplexer separation. The DL signals will go through DT duplexer then to AFC digital
processing module for digital filtering and self-oscillation elimination. Then the DL signals will be sent to
downlink PA to amplify power and filter via duplexer. After amplification, the signals are transmitted at the
MT port to the service antenna.
On the UL, the signals transmitted by the mobile go through MT integration duplexer and AFC digital
processing module then to uplink PA to power amplify and filter via duplexer, finally get back to BS by
donor antenna.

USER MANUAL FOR RX-8123
RX-8123 II2 QI Copyright - refer to title page Page 10
ENU Status : 1-0-1
2.2 EQUIPMENT LAYOUT
The following figure shows RX-8123 internal layout.
DL PA
UL PA
Duplexer
VSWR
Module
Surge
Arrestor
MODEM
Distribution Board
PSU
Li-ion Battery
AFC Digital Module
ANTTX RX
Figure 2: RX-8123 Internal Layout