Comba Telecom RA-7800 User manual

INSTALLATION GUIDE FOR RA-7800
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INSTALLATION GUIDE
The information contained herein is the
responsibility of and is approved by the
following, to whom all enquiries should
be directed in the first instance:
Technical Writing
Comba Telecom Ltd.
This is an unpublished work the copyright in which vests in Comba International ("Comba"). All rights reserved.
The information contained herein is confidential and the property of Comba and is supplied without liability for errors or
omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The
copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.
RA-7800
DUAL-BAND OPTICAL REPEATER

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0.2 CONTENTS
Section Page
0.2 CONTENTS ........................................................................................................................... 2
0.3 INDEX TO FIGURES AND TABLES ..................................................................................... 4
0.4 HISTORY............................................................................................................................... 6
0.5 ISSUE CONTROL ................................................................................................................. 7
0.6 REFERENCES ......................................................................................................................8
0.7 GLOSSARY OF TERMS ....................................................................................................... 9
0.8 SAFETY NOTICES AND ADMONISHMENTS.................................................................... 10
0.9 SERVICING POLICY AND RETURN OF EQUIPMENT ..................................................... 11
0.10 READERS COMMENTS ..................................................................................................... 12
1GENERAL INFORMATION ................................................................................................. 13
2EQUIPMENT DESCRIPTION.............................................................................................. 15
2.1 SYSTEM DIAGRAM ............................................................................................................ 15
2.2 TYPICAL APPLICATION..................................................................................................... 16
2.2.1 DUAL FIBER CONFIGURATION ........................................................................................ 16
2.2.2 SINGLE FIBER CONFIGURATION .................................................................................... 17
2.3 EQUIPMENT LAYOUT........................................................................................................ 19
2.4 EQUIPMENT CONSTITUTION ........................................................................................... 22
2.5 KIT OF PARTS ....................................................................................................................23
3INSTALLATION ...................................................................................................................24
3.1 WARNINGS AND ALERTS ................................................................................................. 24
3.2 SITE PLANNING CONSIDERATIONS................................................................................ 25
3.2.1 REPEATER INSTALLATION CHECKLIST ......................................................................... 26
3.3 INSTALLATION PROCEDURES ........................................................................................ 27
3.3.1 GOODS INWARDS INSPECTION ...................................................................................... 27
3.3.2 TOOLS................................................................................................................................. 27
3.3.3 PREPARATION ................................................................................................................... 27
3.3.4 RACK MOUNTING OF MU .................................................................................................28
3.3.5 MOUNTING RACK OF RU.................................................................................................. 29
3.3.6 RU LIFTING LUG ................................................................................................................ 30
3.3.7 WALL MOUNTING OF MOUNTING RACK ........................................................................ 30
3.3.8 POLE MOUNTING OF MOUNTING RACK......................................................................... 31
3.3.9 ATTACHING RU ONTO MOUNTING RACK ...................................................................... 31
3.3.10 DRIP-LOOP......................................................................................................................... 32
3.4 EQUIPMENT CONNECTORS ............................................................................................ 32
3.4.1 MU CONNECTORS ............................................................................................................ 32
3.4.2 RU CONNECTORS............................................................................................................. 40
3.5 EQUIPMENT CONNECTION .............................................................................................. 40
3.5.1 GROUNDING CONNECTION............................................................................................. 40
3.5.2 SERVICE VOLTAGE CONNECTION ................................................................................. 41
3.5.3 LI-ION BATTERY CONNECTION ....................................................................................... 41
3.5.4 RF CONNECTION............................................................................................................... 42
3.5.5 OPTICAL CONNECTION BETWEEN MU AND RU ........................................................... 42
3.5.6 BTS ALARM CONNECTION ............................................................................................... 42
3.5.7 EXTERNAL ALARM CONNECTION................................................................................... 43
3.5.8 INTEGRATED MODEM CONNECTON .............................................................................. 43
3.5.9 CONNECT TO PC............................................................................................................... 44
4COMMISSIONING............................................................................................................... 45
4.1 PRE-COMMISSIONING TASKS ......................................................................................... 45
4.2 LED INDICATORS .............................................................................................................. 46

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4.2.1 MU LED INDICATORS........................................................................................................ 46
4.2.2 RU LED INDICATORS ........................................................................................................ 46
4.3 OMT..................................................................................................................................... 47
4.3.1 OMT SOFTWARE INSTALLATION .................................................................................... 47
4.3.2 OMT SOFTWARE VERSION .............................................................................................. 47
4.3.3 CONNECTION TO OMT ..................................................................................................... 47
4.3.4 DESCRIPTIONS OF PARAMETERS.................................................................................. 48
4.3.5 FAULT MANAGEMENT ...................................................................................................... 52
4.3.6 DATA MAINTENANCE........................................................................................................ 52
4.4 NON-VOLATILE MEMORY ................................................................................................. 53
4.5 COMMISSIONING PROCEDURES .................................................................................... 54
5OPERATION........................................................................................................................ 55
6MAINTENANCE ..................................................................................................................56
6.1 O-RING FITTING DETAILS................................................................................................. 56
7APPENDICES......................................................................................................................57
7.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE ................................. 57
7.2 APPENDIX B: RMA (RETURN MATERIAL AUTHORIZATION) FORM)............................ 58

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0.3 INDEX TO FIGURES AND TABLES
Fig 1: Front, side and bottom views of MU enclosure ..........................................................................14
Fig 2: Front, side and bottom views of RU enclosure...........................................................................14
Fig 3: MOU System diagram.................................................................................................................15
Fig 4: RU System Diagram ...................................................................................................................15
Fig 5: Application of one MU with one RU through Single Channel FOU ............................................ 16
Fig 6: Application of one MU with two RUs through Double Channel FOU..........................................16
Fig 7: Application of one MU with four RUs through two Double Channel FOUs ................................ 17
Fig 8: Application of one MU with one RU through Single Channel FOU with WDM........................... 17
Fig 9: Application of one MU with two RUs through Double Channel FOU with WDM ........................ 18
Fig 10: Application of one MU with four RUs through two Double Channel FOUs with WDM .............18
Fig 11: Front view of one MOU with one RRU through singlel channel FOU with WDM and duplex
input..............................................................................................................................19
Fig 12: Front view of one MOU with two RRU through dual channel FOU without WDM and simplex
input..............................................................................................................................19
Fig 13: Front view of one MOU with four RRU through one dual channel FOU and one single FOU
with WDM and duplex input.......................................................................................... 20
Fig 14: Front view of one MOU with four RRU through dual channel FOUs without WDM and simplex
input..............................................................................................................................20
Fig 15: RU equipment layout ................................................................................................................21
Fig 16: Rack mounting of 19” shelf .......................................................................................................28
Fig 17: RU mounting rack dimension....................................................................................................29
Fig 18: RU enclosure lifting lug attachment details ..............................................................................30
Fig 19: Wall mouting overview ..............................................................................................................30
Fig 20: Pole mouting overview..............................................................................................................31
Fig 21: Attaching the RU onto the mounting rack .................................................................................32
Fig 22: MOU back panel view ...............................................................................................................38
Fig 23: Rear shelf connectivitity of one MOU with one RRU through single channel FOU with WDM 38
Fig 24: Rear-shelf connectivitity of one MOU with two RRU through dual channel FOU with WDM ... 39
Fig 25: Rear-shelf connectivitity of one MOU with three RRU through one single FOU and one dual
channel FOU with WDM............................................................................................... 39
Fig 26: Rear-shelf connectivitity of one MOU with four RRU through dual channel FOUs with WDM.39
Fig 27: RU connectors ..........................................................................................................................40
Fig 28: Pin allocation for “BTS_ALM” port ............................................................................................42
Fig 29: Pins allocation for “EXT_ALM”..................................................................................................43
Fig 30: Wireless modem .......................................................................................................................44
Fig 31: “O” ring fitting details.................................................................................................................56
Table 1: MU Shelf Equipping Rule........................................................................................................20
Table 2: RA-7800 Regular KOP............................................................................................................23
Table 3: MU KOP ..................................................................................................................................23
Table 4: RU KOP ..................................................................................................................................23
Table 5: Installation checklist ................................................................................................................26
Table 6: PSU SIU description ...............................................................................................................33
Table 7: MCU SIU description ..............................................................................................................34
Table 8: CBU SIU description ...............................................................................................................34
Table 9: RFU SIU description ...............................................................................................................35
Table 10: RFU SIU description .............................................................................................................35
Table 11: Single Channel FOU SIU description ...................................................................................36
Table 12: Single Channel FOU SIU with WDM description.................................................................. 36
Table 13: Dual Channel FOU SIU description ......................................................................................37
Table 14: Dual Channel FOU SIU with WDM description .................................................................... 37
Table 15: MOU back panel connectors ................................................................................................38
Table 16: RU connector list...................................................................................................................40
Table 17: Pin definition of the BTS_ALM port.......................................................................................43
Table 18: External alarm signal definition.............................................................................................43
Table 19: Voltage applied to EXT_ALM pin..........................................................................................43
Table 20: MU LED Indicators................................................................................................................46

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Table 21: RU LED Indicators ................................................................................................................46
Table 22: RF information ......................................................................................................................49
Table 23: Management - RF parameters..............................................................................................49
Table 24: Alarm List for RA-7800..........................................................................................................50
Table 25: FOU SIU alarm .....................................................................................................................50
Table 26: Properties information...........................................................................................................51
Table 27: Alarms diagnosis...................................................................................................................55

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0.4 HISTORY
Change No. ENU Details Of Change
1 1-0-0 Installation Guide initially created and released in Mar 2008.
2 1-0-1 Document revised for India and Brazil Offices change in Apr 2008.

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0.5 ISSUE CONTROL
Date 25
Mar
08
09
Apr
08
Section
All All All

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0.6 REFERENCES
0.6.1 RA-7800s2-1001YH Original user manual released in Mar 2008.
0.6.2 OMT v3.20 QE 1-1-0 User manual released in Jan 2007

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0.7 GLOSSARY OF TERMS
ALC Automatic Level Control
ATT Attenuation
BS Base Station
BTS Base Transceiver Station
dB Decibel
dBm Decibels relative to 1 milliwatt
DL Downlink
DPX Duplexer
DT Donor Terminal
EEPROM Electrically Erasable Programmable Read Only Memory
E/O,O/E Electrical/Optical, Optical/Electrical
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
OP Optical Fiber
PA Power Amplifier
PLL Phase Locked Loop
POI Point of Interconnects
PSU Power Supply Unit
RF Radio Frequency
RX Receive
SMA Sub-Miniature “A” Connector
TX/RX Transmit/Receive
UL Uplink
VAC Volts Alternating Current
VSWR Voltage Standing Wave Ratio
WCDMA Wideband Code Division Multiple Access
WDM Wavelength Division Multiplexer

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

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0.9 SERVICING POLICY AND RETURN OF EQUIPMENT
The repair of individual units and modules of this equipment is not considered practicable without
factory facilities. It is, therefore, the policy of Comba whereby faulty units or modules are returned to
the local agent for repair.
To enable an efficient, prompt after sales service to be provided for the diagnosis, repair and return of
any faulty equipment, please comply with the following requirements.
Items to be sent for repair should be packaged so as to provide both electrostatic and physical
protection and a Repair Material Authorization (a sample of this is in the appendix) completed giving
the required information. This request must be included with the item for repair, items for repair
should be sent to the nearest Comba office:
COMBA TELECOM LTD.
Hong Kong Office
Address: 611 East Wing, No. 8 Science Park West Avenue, Hong Kong Science Park,
Tai Po, Hong Kong.
Tel: [phone]
Fax: [phone]
Email: [email protected]
Singapore Office
Address: 865 Mountbatten Road, Katong SC #05-43, Singapore 437844
Tel: + 65 6345 4908
Fax: + 65 6345 1186
Email: [email protected]
Thailand Office
Address: 3rd Floor, T. Shinawatra Building, 94 Sukhumvit Soi 23, Sukhumvit Road, Klongtoeynua,
Wattana, Bangkok 10110
Tel: [phone]
Fax: [phone]
India Office
Address: 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]
Brzail 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, 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 RA-7800 QI
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 RA-7800 Dual-band Optical Repeater (hereinafter called “RA-7800”) is a low cost network
solution which provides flexible and scalable solution of dual band and multi-operator coverage
extension applications, such as citywide enhancement, highway, and scenic spot, etc.
This system consists of Master Unit (MU) RA-7800-D and Remote Unit (RU) RA-7800-R. The MU can
support up to four RUs through optical fibers.
The low signal transmission loss of optical fiber is applicable for long distance transmission. There is
no isolation problem between TX and RX antennas, which means customer can select the antenna
flexibly according to the real situation, such as directional or omni-directional antenna.
Remote configuration and surveillance is possible through Comba’s OMC remote control and
monitoring system.
Characteristics of RA-7800 are as follows:
•Dual-band configuration supports a single system of two frequency bands, e.g., GSM1800 +
WCDMA2100.
•With the broadband optical system: 75MHz for GSM1800, 60MHz for WCDMA2100.
•Master Unit accommodates slide-in modules that allows flexible and scalable system
configuration.
•High output power with high linearity, which supports multiple carrier operation and ensures the
signal source is of good quality.
•Optical fiber transmission up to 20km with the maximum optical path loss of 10dB.
•Li-ion battery keeps the alarm unit running in the event of power failure.
•Local Operation and Maintenance Terminal (OMT): operating status and parameters can be set
or monitored by OMT PC locally. And the point-to-point setting and inquiry between MU and RU is
realizable through the integrated wireless modem, which makes it convenient for on-site
configuration.
•Operation Maintenance Center (OMC): systemworking parameters and communication
configuration can be set or inquired remotely through the integrated wireless modem. If alarm is
generated, the equipment will dial up to OMC automatically in the mode of SMS or datalink.
•The equipment enclosure of RU is designed for all-weather outfoor installation – water-proof,
damp-proof and omni-sealed.

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The figures below show the equipment enclosure layout of RA-7800 MU and RU:
360
482
177
Fig 1: Front, side and bottom views of MU enclosure
DCS
215
760
370
WCDMA
OP/DL_UL
200-240V~50Hz/60Hz
RS-232 EXT_ALM
Fig 2: Front, side and bottom views of RU enclosure

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2 EQUIPMENT DESCRIPTION
2.1 SYSTEM DIAGRAM
GSM 1800
WCDMA 2100
DL Adapter
UL Adapter
Optical Tx/Rx
Combiner
E/O
O/E Uplink
Downlink
MCU
PC
Distribution
Board
Power
Input
Fig 3: MOU System diagram
Fig 4: RU System Diagram
As shown in the above figures, the combined signals as GSM1800 and WCDMA2100 from the BTSs
are received and converted into optical signals after amplification in the MU, and then the optical
signals are transmitted to the RU via optical fiber. In the RU, the optical signals are converted into
electrical signals. After being amplified, the signals are transmitted to the customer’s mobile phone via
service antenna.

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The RF signals from the customer phones are received by the RU and converted to the optical
signals after amplification in the RU. And then via UL optical fiber, the signals are transmitted to the
MU, which then converts the optical signals into RF signals. After amplification, the signals are
transmitted back to the BTS.
2.2 TYPICAL APPLICATION
2.2.1 DUAL FIBER CONFIGURATION
For equipments without configuring WDM Unit, the dual fiber configuration is applicable. Refer to the
following two applications:
2.2.2.2 Typical Application of Dual Fiber Configuration
Typically one MU can be connected with one or two RU (s) through using the Single Channel FOU or
Double Channel FOU. Refer to the two figures below:
Tx/Rx
Tx/Rx OP DOWNLINK
OP UPLINK
Coupler
BTS MT
OP DOWN
ANT
FOU
MU
OP UP
1310nm
1550nm
1310nm
1550nm
RU
Fig 5: Application of one MU with one RU through Single Channel FOU
Tx/Rx
Tx/Rx
OP Downlink2
OP Uplink2
Coupler
BTS MT
OP Downlink
ANT
MU
OP Uplink
FOU
OP Downlink1
OP Uplink1
MT
OP Downlink
ANT
OP Uplink
1310nm
1550nm
1310nm
1550nm
RU
RU
Fig 6: Application of one MU with two RUs through Double Channel FOU

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2.2.2.2 Extension Application of Dual Fiber Configuration
One MU can host four RU (s) by equipping two Double Channel FOUs. Refer to the figure below:
Coupler
Fig 7: Application of one MU with four RUs through two Double Channel FOUs
2.2.2 SINGLE FIBER CONFIGURATION
For equipments with WDM Unit, the single fiber configuration is applicable. Through using WDM
technique, one fiber is shared between optical signals.
Refer to the following two applications of single fiber configuration:
2.2.2.1 Typical Application of Single Fiber Configuration
Shown below is a typical application showing the ability to interwork RA-7800 with existing fiber (e.g.
1310nm occupied)
Coupler
FOU
Fig 8: Application of one MU with one RU through Single Channel FOU with WDM

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CouplerCoupler
Fig 9: Application of one MU with two RUs through Double Channel FOU with WDM
2.2.2.2 Extension Application of Single Fiber Configuration
A MU can host four RUs through FOU. This can be achieved by accommodating two Double Channel
FOUs with WDM. Refer to the figure below:
Coupler
Fig 10: Application of one MU with four RUs through two Double Channel FOUs with WDM

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2.3 EQUIPMENT LAYOUT
The MU is constructed into a 19” shelf; it is connected via the connectors located on the front and
back panel. The RU is designed for all cables entries from the bottom of the enclosure.
The MU consists of a shelf that accommodates up to seven slide-in slots numbered from ‘1’ to ‘7’
from left to right. The following slide-in units are accommodated with the MU:
yFiber Optical Unit (FOU)
yRadio Frequency Unit (RFU)
yCombining Unit (CBU) (duplex input MU only)
yMain Control Unit (MCU)
yPower Supply Unit (PSU)
The equipment layout of MU shelf depends on the customer’s network requirement, and affects the
FOU variant and quantity required for the MU.
For illustration purposes, shown below are standard and extension applications through single
channel & dual channel FOUs configurations with the following PSU and RFU apllications:
AC220V PSU,
RFU with wireless modem.
UplinkDownlink
FOU
Downlink
Uplink
2100MHz
1800MHz
PSU
MCU
CBU
RFU
POWER
220
⫗
240V
50/60Hz
FSK
ALARM
RUN
RS-232
BTS-ALM
MODEM
OP/DL_UL
RFU
Fig 11: Front view of one MOU with one RRU through singlel channel FOU with WDM (Duplex Input)
UplinkDownlink
FOU PSU
MCU
RFU
POWER
220
⫗
240V
50/60Hz
FSK
ALARM
RUN
RS-232
BTS-ALM
MODEM
OP/Downlink OP/Uplink
RFU
OP/Uplink
OP/Downlink
Fig 12: Front view of one MOU with two RRU through dual channel FOU without WDM
(Simplex Input)

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OP/DL_UL
OP/DL_UL
RFU
MODEM
BTS-ALM
RS-232
RUN
ALARM
FSK
220
⫗
240V
50/60Hz
POWER
RFU CBU MCU PSU
1800MHz 2100MHz
Uplink Downlink
FOUFOU
Downlink Uplink
OP/DL_UL
Fig 13: Front view of one MOU with three RRU through one dual channel FOU and one single FOU
with WDM (Duplex Input)
OP/Uplink
OP/Downlink
OP/Uplink
OP/Downlink
OP/Uplink
OP/Downlink
OP/Uplink
OP/Downlink
RFU
MODEM
BTS-ALM
RS-232
RUN
ALARM
FSK
220
⫗
240V
50/60Hz
POWER
RFU MCU PSU
FOUFOU
Downlink Uplink
Fig 14: Front view of one MOU with four RRU through dual channel FOUs without WDM
(Simplex Input)
Shown below is the equipping rule of the MU shelf.
Solution and SIU equipping Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7
4x RU Solution 2 2
3x RU Solution 2 1
3x RU Solution 1 2
2x RU Solution 2 Blank
2x RU Solution Blank 2
1x RU Solution 1 Blank
1x RU Solution Blank 1
RFU RFU
Duplex
Input:
CBU
Simplex
Input:
Blank
MCU PSU
Table 1: MU Shelf Equipping Rule
•‘1’ denotes Single Channel FOU (with or without Integrated WDM capability)
•‘2’ denotes Dual Channel FOU (either with or without Integrated WDM capability). By design,
only slot ‘1’ and ‘2’ can accommodate Dual Channel FOU
•“Blank” denotes position for “Blanking off plate” this slot may be interchanged with Single
Channel FOU
•RFU by design is equipped in Slot 4, CBU is for duplex input optionally in Slot 5 and it is blank
if simplex input is applied, MCU by design is equipped in Slot 6, PSU by design is equipped
in slot 7