DCS-LTE1800&WCDMA2100 Dualband
Fiber Optical Repeater User Manual
Master Unit
Remote Unit
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CenRF Communications
Dualband Fiber Optical Repeater User Manual
Contents
ABBREVIATION ............................................................ 4
SAFETY WARNINGS ........................................................ 5
ESD PROTECTION ......................................................... 6
PART I
HARD WARE ...................................................... 7
1.OVERVIEW............................................................... 8
2.PRODUCT FEATURES .................................................... 9
3.PRODUCT SPECIFICATIONS ............................................. 11
3.1 APPLIED STANDARDS ................................................................................................................................. 11
3.2 RF SPECIFICATION: .................................................................................................................................... 12
3.3 OPTICAL SPECIFICATION: .......................................................................................................................... 13
3.4 MECHANICAL AND ELECTRIC SPECIFICATION:.......................................................................................... 13
4.INSTALLATION .......................................................... 13
4.1 BEFORE INSTALLATION .............................................................................................................................. 13
4.1.1 Choosing a site location ................................................................................................... 13
4.1.2 Power supply ..................................................................................................................... 14
4.1.3 Installation tools and accessories ................................................................................... 14
4.2 INSTALLATION OF MASTER UNIT ................................................................................................................ 14
4.2.1 Mounting Rack Sizes ........................................................................................................ 14
4.2.2 Installing Procedure: Mounting to the communication rack ........................................ 14
4.3 INSTALLATION OF REMOTE UNIT ............................................................................................................... 15
4.3.1 Mounting Rack Sizes ........................................................................................................ 15
4.3.2 Installing Procedure: Mounting to the wall ..................................................................... 16
4.4 CONNECTION OF THE MASTER UNIT ......................................................................................................... 17
4.4.1 Describing Control Panel of the master unit .................................................................. 17
4.4.2 Power Supply connection ................................................................................................ 18
4.4.3 Optical Fiber Cable Connection ....................................................................................... 18
4.4.4 Connection of the BTS Cables ......................................................................................... 19
4.4.5 Grounding .......................................................................................................................... 19
4.4.6 Location.............................................................................................................................. 19
4.4.7 Connection of USB Cable ................................................................................................. 19
4.5 CONNECTION OF THE REMOTE UNIT ......................................................................................................... 19
4.5.1 Panel of Remote Unit ........................................................................................................ 19
4.5.2 Power Supply connection ................................................................................................ 20
4.5.3 Optical Fiber Cable Connection ....................................................................................... 20
4.5.4 Connection of the Antenna Cable.................................................................................... 20
4.5.5 Connection of the Fan ...................................................................................................... 20
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4.5.6 Grounding .......................................................................................................................... 21
4.5.7 Location.............................................................................................................................. 21
4.5.8 Connection of USB Cable ................................................................................................. 21
4.6 CHECK SYSTEM........................................................................................................................................... 21
5.DEVICE PRE-COMMISSIONING SETUP .................................... 21
5.1 SETUP STEPS .............................................................................................................................................. 21
5.2 REPEATER STATUS ..................................................................................................................................... 22
5.3 SETUP PARAMETER OF REPEATER SYSTEM .............................................................................................. 22
6.DESIGN AND FUNCTIONALITY ........................................... 22
6.1 BLOCK DIAGRAM ........................................................................................................................................ 22
6.2 COMPONENTS OF THE MASTER UNIT ........................................................................................................ 23
6.3 COMPONENTS OF THE REMOTE UNIT........................................................................................................ 23
6.4 FUNCTION BLOCK INTRODUCTION ............................................................................................................ 24
PART II: SOFTWARE....................................................... 26
1.REPEATER OMT SOFTWARE GUIDE STEPS ............................... 27
1.1 STEP 1: PREPARATION BEFORE COMMISSIONING .................................................................................... 27
1.2 STEP 2: INSTALL USB DRIVER .................................................................................................................. 27
1.3 STEP 3: CONNECT REPEATER TO COMPUTER .......................................................................................... 28
1.4 STEP 4: RUNNING “CENRF-OMT SOFTWARE” ....................................................................................... 29
PART III: MAINTENANCE ................................................... 35
1. MAINTENANCE AND REPAIR NOTES ..................................... 36
2. EMERGENCY MEASURES ............................................... 36
3.TROUBLESHOOTING GUIDE ............................................. 37
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Abbreviation
Abbreviation would be used in the manual
AC
ACPR
AGC
ALC
APAC
BS
BTS
CDMA
CF
CFO
CPU
CW
DC
DCS
DL
EMC
ESD
FDD
GSM
HW
LED
LTE
IF
LNA
MODEM
MS
MTBF
MTTR
OMT
OP
PA
PHS
PLL
RX
RF
TDMA
TX
UPS
VCO
WCDMA
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Alternating Current
Adjacent Channel Power Ratio
Automatic Gain Control
Adaptive Logic Circuit
Automatic Power Adjustment Circuit
Base System
Base Site System
Code Division Multiple Access
Center Frequency
Center Frequency Offset
Central Processing Unit
Continuous Wave Radar
Direct Current
Digital Cell System
Downlink
Electro Magnetic Compatibility
Electrostatic Discharge
Frequency Division Duplex
Global System for Mobile Communication
Hardware
Low Emitting Diode
Long Term Evolution
Intermediate Frequency
Low Noise Amplifier
Modulator-Demodulator
Mobile System
Mean Time Between Failures
Mean Time To Failures
Operation Maintenance Terminal
Optic fiber
Power Amplifier
Personal Handy phone System
Phase Locked Logic
Receive Port
Radio Frequency
Time Division Multiple Address
Transmit Port
Uninterrupted Power system
Vector Controlled Oscillator
Band selective Code Division Multiple Access
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Safety Warnings
Ø
Repeater is used to receive and amplify the signal from donor BTS and
transfer the signal to the mobile station in the coverage area. It also receives signal from
mobile station in the coverage area then amplifies and transfers to donor BTS. In coverage
project design a factor to be taken into account is that the uplink noise level that the repeater
outputs can affect the sensibility of BTS.
Ø
Grounding: Make sure there is proper grounding on chassis, feedback antenna
and power socket.
Ø
Lightning protection: make sure the outdoor antenna mounting rack shall be
outfitted with a lightning rob.
Ø
Before turning on power, operator shall confirm that RF output port is
connected to load system (eg antenna). Operator shall also make sure the antenna VSWR is
less than 1.5, otherwise the equipment is likely to be damaged after running long time.
Ø
To avoid electric shock by the high voltage power, before installation, the
repeater power shall be turned off.
Ø
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Do not expose yourself long time to the repeater antenna system in working
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condition because the electromagnetic field emitted by repeater may do harm to your health.
Ø
If installed at height (onto the pole), the repeater shall be securely fixed to
prevent body injuries from dropping parts.
Ø
The front panel of the repeater shall be kept in place while open. When
working outdoor, operator shall bind the cover tightly. Otherwise finger or head may be injured
as a gust of wind slams the cover.
Ø
Ni-Hi battery is used as backup battery. The used battery shall be disposed
carefully to prevent from environmental pollution.
ESD Protection
Ø Electrostatic discharge can't injure human body but may damage the key components of the
repeater as being dealt improperly.
Ø Most of parts are vulnerable to static electricity.
Ø Unless have to, do not touch PCB and the conductors without insulator or touching the
repeater Cabinet first.
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Part I
CenRF Communications
Hard Ware
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1.Overview
CenRF Communications is a professional supplier of coverage equipment for mobile radio
networks, specializing in low cost, high performance RF and fiber optical repeaters. CenRF fiber
optical repeater system is ideal for applications outdoor installations, like highways, tunnels,
subways, as well as large building complexes including exhibition halls and airports.
Cellular telephone systems transmit signals in two directions between base station (BTS) and
mobile stations (MS) within the signal coverage area.
If weak signal transmissions occur within the coverage area because of indoor applications,
topological conditions or distance from the transmitter, extension of the transmission range can
achieved by means of an optical distribution system.
Such a system contains an optical master unit and several remote units. The number of the remote
units depends on the hardware and software configuration. The remote units are connected to the
master unit with optical links. The optical loss must be less than 12 dB inclusive optical couplers or
splitters.
Fiber
Fiber
Master Unit
Fiber
Fiber
Remote Unit 4
Antenna system D
Remote Unit 3
Antenna system C
Remote Unit 2
Antenna system B
Remote Unit 1
Antenna system A
LTE DCS1800
Signal Source
Passive antenna system
Coupler
WCDMA UMTS2100
Signal Source
Combiner
Figure 1-1 Dualband Fiber Optical Repeater Application
See application diagram in figure 1.1, The master unit is connected with the donor BTS. The
configuration of a master unit depends on the number of the remote units and the frequency range.
One master unit is capable of supporting up to 4 remote units.
The Optical Repeater supports Wavelength Division Multiplexing (WDM-systems) with a
wavelength of 1550nm for the uplink and 1310 nm for the downlink. To save fiber transmission
paths, the remote unit just requires one optical fiber to transmission optical signal from master unit.
The equipment has the capabilities of remote monitoring, alarm and self-diagnose of some
malfunctions, and so on. In Cabinet of an external power outage, it can keep sending alarm
message to network management center for six hours, facilitating monitoring, configuring and
maintenance. It is a cost-effective solution to expand coverage area for mobile communication.
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2.Product Features
Ø Complete Product Range
With its abundant experience in RF engineering, CenRF have developed a complete range of
repeaters include band selective, channel selective, fiber optical, and frequency translating
products.
Ø Excellent RF performance
CenRF repeaters’ optimized RF design has ensured a transparent and trouble-free up and down
link RF path through the delicacy of balancing & control over parameters like noise figure,
up/downlink power output and link budget, out of band rejection, self-oscillation, ACPR and time
delay etc.
Ø Features
l
l
l
l
l
l
l
l
l
l
l
High-linearity amplifier to minimize the noise and interferences.
Wide gain adjustment range.
Multi line cavity filter with high selectivity and low insertion loss which eliminates up & down
link interference and ensure system high gain.
Unique RF design technique that specially avoids interference with DCS-LTE1800
WCDMA2100 RF signal.
PLL technique and digital filter technique which enhance out-band rejection and in band ripple.
Lightning proof and lightning switch system.
Full-duplex communication, very high up-down link isolation.
Ease of installation with standard two antenna ports.
Inner power supply with protection mechanism that is exempting maintenance.
ALC technology, repeater output steady power which can be adjusted in series.
Full remote and local control and monitoring system with integrated modem for point to point
through OMT system and OMC platform on options.
Ø Powerful CPU module
The powerful CPU module enables setting up, query and monitoring of various repeater info and
parameters. Imbedded backup batteries for the CPU module enable alarms to be sent out
continuously for two hours when there is an power supply outage. LEDs on control panel of
repeater indicate the status and door alarm convenient for onsite installation and maintenance.
CPU module can also be connected through RS232 serial interface locally.
Ø Flexible Remote Control & Monitoring Options
A GSM (or CDMA) wireless modem is imbedded in CenRF repeater, supporting SMS and data
communication, for point to point remote control and monitoring, between repeater site and
Operating & Maintenance Center through CenRF Repeater OMT (Operation & Maintenance
Terminal) software. Upon customer’s option, CenRF OMC Software or Network Management
System (NMS) can be customized to suit operators with a large number of repeaters deployed in
networks, providing centralized monitoring and control at OMC level.
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Ø Reliable Mechanical Design
Having adopted IP65 die-cast aluminum casing designed for tough weather conditions outdoor and
indoor, suiting temperature from -40℃ to +85℃, together with its reasonable and compact modules
layout, the repeater has proven to have good heat dissipation performance through rigorous
thermal simulation and temperature testing. The mouldcase was nickel-plated to give good EMC
and anticorrosion performance. Multiple lightning-proof measures are adopted at the power supply,
antenna and feeder cable. The MTBF of the repeater is ensured no less than 50,000 hours.
Ø Application
The equipment is mainly used as signal station of indoor distributing system or outdoor large-scale
cover, Power output range from 27dBm to 40dBm downlink optionally.
Ø Optical Master Unit Outlook
Volume (Width x Height x Length)
430×44×231.2 (mm)
Weight
<5kg (6kg including packaging)
Front panel
Unit：mm
Figure 2-1 Optical Master Unit outlook
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Ø Optical Remote Unit Outlook
Volume (Height x Width x Length) (mm)
Weight (kg)
489×409×186.5
35
Ce nRF
Unit：mm
Figure 2-2 Positive appearance of the Remote Unit
Unit：mm
Figure 2-3 Bottom appearance of the Remote Unit
3.Product Specifications
3.1 Applied Standards
YD/T 1337-2005: Technical requirements and testing methods for 800MHz/1800MHz repeater for
TDMA digital cellular mobile communication network.
YD/T 1241-2002: 800MHz CDMA digital cellular mobile telecommunication network technical
requirements and test methods for repeater.
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YD/T 883-1999: 900MHz/1800MHz TDMA Digital Cellular Mobile Telecommunication Network
Technical Requirement of Base Station Subsystem and Test Methods of Radio Characters.
YD 1139-2001: Requirement and Measurement Methods of Electromagnetic Compatibility for
900/1800MHz Digital Cellular Telecommunications System Part 2:Base Station and Ancillary
Equipment.
YD 1169.2-2001: Requirement and Measurement Methods of Electromagnetic Compatibility for
800MHz CDMA Digital Cellular Mobile Telecommunications System (Part 2: Base Station and
Ancillary Equipment).
GB 15842-1995: safety request and test measure of mobile communication equipment.
IEC 60950 1999-04: safety of information technology equipment (third edition).
3.2 RF Specification:
Parameter
Frequency Range
Uplink
Downlink
1710 - 1785 MHz
1805 - 1880 MHz
1920 - 1980 MHz
2110 - 2170 MHz
-10dBm
43dBm/band
55dB
55dB
30dB, Step 1dB
30dB, Step 1dB
≤ |±1.5|dB
≤ |±1.5|dB
20dB
20dB
≤ |±2.0| dB
≤ |±2.0| dB
20dBm
20dBm
≤ ±0.05ppm
≤ -50dBc
≥ 45dBc/5MHz; ≥50dBc/10MHz
≤ -45dBc
≤ -45dBc
≤ 6%
≤ 6dB
≤ 6dB
≤ 5dB
≤ 5dB
LTE FDD 1800 Band
LTE FDD 2100 Band
Max. Output Power
Max. Gain
ATT Adjustable Range
ATT Adjustable Error
ALC Range
ALC Accuracy
Max. nondestructive input power
Frequency Error
Intermodulation
ACLR
PCDE
ACPR
EVM
LTE FDD 1800 Band
Ripple In Band
(p-p)
LTE FDD 2100 Band
Spectrum
Emission
Mask PAR=8
Spurious Emission
(at out of band
offset ±10MHz)
Time Delay
VSWR
Noise Figure
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7  f _ offset
7  f _ offset


− 7dBm− ⋅ 
− 0.05dB − 7dBm− ⋅ 
− 0.05dB
5  MHz
5  MHz


0.05MHz≤f_offset<5.05MHz
5.05MHz≤f_offset<10.05MHz
10.5MHz≤f_offset<max
9kHz~150kHz
150kHz~30MHz
30MHz~1GHz
1GHz~12.75GHz
-14dBm/100kHz
-15dBm/30kHz
≤ -36dBm /1KHz
≤ -36dBm/10KHz
≤ -36dBm@100KHz
≤ -20dBm@1MHz
≤ 5us
≤ 1.5
≤ 5.0
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-14dBm/100kHz
-15dBm/30kHz
≤ -36dBm/1KHz
≤ -36dBm/10KHz
≤ -36dBm@100KHz
≤ -20dBm@1MHz
≤ 5us
≤ 1.5
/
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Dualband Fiber Optical Repeater User Manual
3.3 Optical Specification:
Optical Connector
Optical Wavelength
Optical Output Power
MU
RU
MU
RU
MU
RU
FC/APC * 4, Independent optical path
FC/APC * 1
TX: 1550nm / RX: 1310nm, Single Mode
TX: 1310nm / RX: 1550nm, Single Mode
-2dBm ±3
4dBm ±3
0 to 7dB, Max 10dB
1 core, Single Mode
Fiber optic path attenuation range
Fiber core number from MU to 1 RU
3.4 Mechanical and electric Specification:
RF Connector
Power Supply
Power Consumption
Dimension
Weight
Environmental Class
Operating Temperature
Humidity
Control Function
MU
RU
MU
RU
MU
RU
MU
RU
MU
RU
MU
RU
MU
RU
MU
RU
N(F) * 1
N(F) * 1
DC -48V, ±20%
AC 220V, ±20%
≤80W
≤300W
482*300*44mm
489*409*186.5mm
8Kg
35Kg
IP20 (Indoor)
IP55 (Outdoor) + Fan + “H” Frame
-5 to +45 ℃
-25 to +55 ℃
0 to 80%
0 to 95%
MU
Local: mini USB (External)
Remote: GSM/UMTS900/1800/2100 Modem)
RU
Local: mini USB (Internal)
4.Installation
4.1 Before installation
4.1.1 Choosing a site location
Ø Make sure access is restricted to qualified personnel
Ø Install the product where power supply and feeder cable are accessible.
Ø Site location should be far away from heat source and damp environment.
Ø Repeater should be put in a well-ventilated work area. It should be hung on the wall or the
pole to ensure being ventilated. If the repeater is mounted on the wall, there should be at least
50cm away from the ceiling and a 100cm height space shall be left empty between the
repeater and the ground.
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4.1.2 Power supply
Power supply of the master unit is normally -48DC, and Power supply of the remote unit is normally
220VAC/50±5Hz. Also the power supply of these products can adopt other type AC or DC power
according as user requirement.
4.1.3 Installation tools and accessories
No.
parts
Model
Quantity
Comments
1
Expansion Bolt
M10*100m
4
2
Inner Hex Bolt
M8*38mm
8
3
Fixing Nuts
(Non-standard)
M8
8
4
Bolt
M4*8mm
8
5
Bolt
M5*15mm
8
6
L Hex Wrench
Cross
screwdriver
Electric drill
#15
1
To fix rack onto the wall
Preinstalled in holes on each side
of the Remote Unit cabinet
Preinstalled in corners of Remote
Unit cabinet front door
Preinstalled mounting rack on two
sides of Master Unit to the cabinet
Preinstalled mounting rack on two
sides of Remote Unit
To tighten or loose M8 Hex bolts
1
To tighten or loose M4,M5 bolts
1
Drill holes on the wall
7
8
4.2 Installation of Master unit
4.2.1 Mounting Rack Sizes
Positive
Side
Unit：mm
Figure 4-1 Mounting Rack of Master Unit
4.2.2 Installing Procedure: Mounting to the communication rack
Steps:
⑴ Install 2 M4 screws on each side of the Master unit with a cross screwdriver, show as
Figure 4-2.
Side
Figure 4-2 Fit the small Mounting Rack on the Master Unit
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⑵ Install Master unit in the 19-inch(480mm) communication rack in mobile communication
Base Stations, show as Figure 4-3.
Figure 4-3 Install Master unit in communication rack
4.3 Installation of Remote Unit
4.3.1 Mounting Rack Sizes
Unit：mm
Figure 4-4 Mounting Rack of Remote Unit
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4.3.2 Installing Procedure: Mounting to the wall
Steps:
⑴ Close the front door; tighten the 8 Inner Hex Bolts (M8*38mm) to lock the Remote Unit
using L Hex Wrench.
⑵ Take out the mounting bracket with fan, use an electric drill to drill four holes in the wall,
Depth 100mm, Horizontal hole distance 300mm, Vertical hole distance 291mm, show as
Figure 4-4.
⑶ Insert four expansion bolts (M10*100mm) into the four holes.
⑷ Fix the Remote Unit onto the mounting rack, 8 bolts (M5*15mm) are installed on two
sides of the Remote Unit.
⑸ Tighten the 8 bolts (M5*15mm) on mounting rack with Cross screwdriver, Make sure the
repeater is tightly fixed to the mounting rack, show as Figure 4-5.
⑹ Hang the mounting rack on the four expansion bolts, show as Figure 4-6.
1
2
3
4
Side
Unit：mm
1. Remote Unit
2. Bolts(M5*15mm)
3. Fan
4. Mounting Rack
Figure 4-5 Fit the Mounting Rack on the Remote unit
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4
3
1
2
1. Wall
2. Expansion Bolt
3. Remote Unit
4. Mounting Rack
Figure 4-6 Install to a wall
4.4 Connection of the Master Unit
4.4.1 Describing Control Panel of the master unit
1
2
3 4 5
6
7 8
9
10
11 12 13
1 Ground Port 2 FC/APC Optical Connector 3 Alarm LED (Optical module receive indication)
4 LED of Optical Module Power
5 Alarm LED (Optical module send indication)
6 N-Connector Connects to LTE-DCS 1800 & WCDMA 2100 Signal Source
7 Battery Switch 8 MINI USB Interface
9 Modem Running Indicator
10 SIM Card Slot
11 Location Port 12 Main Power Switch
13 Power Supply Interface
Figure 4-7 Positive Panel of Optical Master Unit
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4.4.2 Power Supply connection
There are signed “+/-“ on the main power supply Junction port, be ensured that the “ + port ” is
connected to DC0V and the “ – port ” is connected to DC-48V.
4.4.3 Optical Fiber Cable Connection
In case of a back a backbone structure it has to be guaranteed that there is a minimum wavelength
difference of 20 nm. This will be guaranteed by using 4 different optical with four different
wavelengths according to ITU grid. Thus, there are also four different remote units. In one optical
backbone, each type of unit can only be used once.
Note: Care should be taken when connecting and disconnecting fiber optic cables.
Scratches and dust significantly affect system performance and may permanently damage
the connector. Always use protective caps on fiber optic connectors not in use.
The optical fiber is a single mode fiber. Type is E9/125 um with the following minimum
requirements.
Attenuation: <0.36 dB/km @ 1310 nm / <0.26 dB/km @ 1550 nm
Dispersion: <3.5 ps/nm km @ 1310 nm / <18.0 ps/nm km @ 1550 nm
Before connecting the fiber cables, follow the procedure below to ensure optimized performance. It
is important that these procedures are carried out with care:
Ø
Remove fiber optic protective caps.
Ø
Do not bend the fiber optic cable in a tight radius (<4 cm) as this may cause cable
damage and interrupt transmission.
Ø
Using high-grade alcohol and lint-free cotton cleaning swabs, clean the end of the fiber
optic cable that will be inserted in the optical connectors on the donor interface box.
Ø
Blow out the laser receptacle with clean and dry compressed air to remove any
particulate matter.
Ø
Connect the fiber optic cables by inserting the cable end into the laser receptacle and
aligning the key (on the cable end) with the keyed slot.
Do not bend the fiber optic cable in a tight radius (<4 cm) as this may cause cable damage and
interrupt transmission.
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4.4.4 Connection of the BTS Cables
The master unit connects to LTE-DCS 1800 & WCDMA UMTS2100 RF output port with 1/2” cable
and 40 dB coupler, be ensure the master unit RF input power is -10dBm～+5dBm.
Positive panel
LTE DCS1800
Signal Source
Passive antenna system
Coupler
WCDMA UMTS2100
Signal Source
Combiner
Figure 4-8 Connection of the Master Unit to BTS
4.4.5 Grounding
Coppery wire or net wire that section is more than 16mm2 is connected to grounding bolt of the
master unit, another end is connected to earth of building, resistance of grounding is less than 5
ohm.
4.4.6 Location
Coppery wire or net wire is connected to Location Port of the master unit, another end is connected
to earth of building. An alarm will be issued if the device is moved.
4.4.7 Connection of USB Cable
USB interface is used for query and parameter setup locally. The interface on the back panel.
Connect the interface to the computer.
Figure 4-9 Connection of the Master Unit to Computer
4.5 Connection of the Remote Unit
4.5.1 Panel of Remote Unit
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1 AC 220V Power Supply Jack
2 Fan Power Jack
3 Location Port
4 FC/APC Optical Connector
5 Power LED
6 N-connector mobile/antenna(DCS&WCDMA)
7 USB Interface
Figure 4-10 Panel of Remote Unit （220VPower Supply）
4.5.2 Power Supply connection
There is a power supply line in the accessories, 220VAC power supply line have pins.
There are signed “+/-“ on the main power supply Junction port if main power supply of the remote
unit is DC, be ensured that the “ + port ” is connected to DC0V and the “ – port ” is connected to
DC-48V when main power supply is DC-48V.
Ø
Air circuit breaker is recommended to be deployed so that it is easy to cut off the power.
Ø
3-pins plug and socket are a must. Grounding shall be in the good status.
Ø
Tighten up the grounding wire with the repeater shell with grounding bolts, nuts, washer
(with the package).
Ø
Install arrester if necessary.
Repeater Power Supply
Air
Switch
Figure 4-11 sketch map of AC power supply connection
4.5.3 Optical Fiber Cable Connection
Optical connector of remote unit is FC/APC type.
4.5.4 Connection of the Antenna Cable
The remote unit has an N-type antenna connector. It connect to serves antenna.
4.5.5 Connection of the Fan
The fan jack of the remote unit is connected to the fan at the bottom with a power cord.
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4.5.6 Grounding
Coppery wire or net wire that section is more than 16mm2 is connected to grounding bolt of the
remote unit, another end is connected to earth of building, resistance of grounding is less than 5
ohm.
4.5.7 Location
Coppery wire or net wire is connected to Location Port of the remote unit, another end is connected
to earth of building. An alarm will be issued if the device is moved.
4.5.8 Connection of USB Cable
There is a USB interface on the Bottom of the Remote Unit. Connect the interface to the computer.
4.6 Check system
Before turning on the repeater, the following items shall be checked:
①
Check carefully whether connection of RF signal is correct.
②
Check the input power supply. Make sure voltage of power supply is in the range of
rated working voltage of the repeater.
③
Check antenna rack, feed cable and the host is grounded. Grounding impedance shall
be ≤ 5 ohm.
④
Check the echo loss of the antenna and feed system. Standing ratio < 1.5.
⑤
The build and pole must be lightning proof.
⑥
Entrance wire of power supply must pass lightning switch.
⑦
Antenna and cable must pass lightning switch
5.Device Pre-commissioning setup
5.1 Setup steps
①
Use the cable to connect PC and serial port on the device. Start PC and run the OMT.
②
Set location and maintenance parameter on OMT.
③
Set alarms and monitoring on OMT.
④
Test whether strength of downlink signal are compliant with the requirement.
⑤
Adjust gain of downlink to make the output power of downlink are compliant with the
design requirement.
⑥
Adjust gain of uplink to max.
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Check whether isolation level of receiving and send are compliant with the requirement.
⑧
Test coverage effect. Tune the angel of antenna.
⑨
Finished setup
5.2 Repeater status
The status of the repeater can be observed through Alarm Power LED. After Power on (or software
reset), system will test ALARM. The LED will blink in red, green in turn for about 2 seconds. Then
the LEDs enter normal status.
Status of LED as follows:
Status
Master Unit ALARM LED
Master Unit Power LED
Remote Unit Power LED
Signification
Signification
Master Unit Optical module
is in good status. No alarm
Signification
Remote Unit is in good
status. No alarm
Optical module is
broken.
No AC power supply or
power module is broken.
Green
/
Red
Optical module receive or
send indication is broken.
Off
Optical module is broken.
No DC power supply or power module is broken.
5.3 Setup parameter of repeater system
Please refer to Repeater Operation / Maintenance Terminal OMT software user Manual.
6.Design and Functionality
6.1 Block Diagram
The following figure shows the configuration of a master unit and several remote units.
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6.2 Components of the Master Unit
The following figure shows an exemplary view of a fully equipped master unit to illustrate the
individual components.
Duplexer
Power Supply DC48V
Optical module
Modem
Monitoring board
6.3 Components of the Remote Unit
The actual configuration of the remote unit can be seen at the configuration list which is part of the
delivery.
The following figure shows an exemplary view of a fully equipped remote unit to illustrate the
individual components.
Power Supply AC220V
Duplexer
Control card
WCDMA Power Amplifier Module
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6.4 Function Block Introduction
1)
RF Board
Uplink
Low noise amplifier: provide low-noise amplification for small signal and input protection
(against damage due to too strong signal) at front end. It also provides perfect
Voltage Standing Wave Ratio.
Intermediate Frequency Circuits: Used VCO and PLL technology to have the good
performance on frequency selective.
Gain adjustment Circuits: To adjust uplink gain; adjustment range 30dB, step 1dB.
Uplink power amplifier: Ensure enough output power for uplink, performing the linear
behavior and perfect output Voltage Standing Wave Ratio.
The maximum gain for uplink: 55±3dB; Rated output power is -2 ± 3dBm.
Downlink
Low noise amplifier: provide low-noise amplification for small signal and input protection
(against damage due to too strong signal) at front end. It also provides perfect
Voltage Standing Wave Ratio.
Selective Frequency Circuits: Used VCO and PLL technology to have the good
performance on frequency selective.
Gain adjustment Circuits: To adjust uplink gain; adjustment range 30dB, step 1dB.
Downlink power amplifier: Ensure enough output power on downlink, giving perfect
linearity output and VSWR.
The maximum gain for downlink is: 55±3dB; rated output power is 43(±2)dBm
Detection Circuit and CPU control interface circuit
a. Adjust gain for uplink and downlink.
b. Set maximum output power for uplink and downlink.
c. Detect temperature on RF board.
d. Detect carrier for uplink and downlink.
e. Detect output power of amplifier for uplink, downlink.
f.
Detect input power for uplink, downlink.
g. Detect low-noise amplifiers’ status for uplink, downlink.
h. Detect lockup status of PLL for uplink, downlink.
i.
Compensate radio frequency shift due to the temperature change on surface filter for
uplink, downlink.
j.
Compensate radio frequency shift due to the temperature change on gain circuit for
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uplink, downlink.
k. Turn on/turn off power amplifier for uplink, downlink.
l.
Detect standing wave on downlink output antenna port.
m. Detect working electric current for uplink, downlink power amplifier.
n. Send alarm signal to CPU while the abnormity emerges.
o. Fix the number of downlink carrier
2)
CPU and MODEM Board
Use I2C bus technology, to connect RF board. Use USB or Modem to connect a host or
monitoring center.
Main functions:
a. Set/keep the control parameters: the password of repeater, alarm phone number, alarm
generating period, and alarm generating time limit and so on. Operator can use PC and
OMC software to lookup and modify these parameters.
b. Set/keep the RF parameters: gain of the repeater, the maximum output power. Operator
can use PC and OMC software to lookup and modify these parameters.
c. Automatically detect the working temperature in the repeater. Automatically take actions
according to the temperature change (-25℃~55℃) , so that specification remain the
same.
d. CPU board is outfitted with rechargeable battery. It offer power output to CPU board
while the outside AC power is off, so that MODEM is able to keep on sending alarm
signal to monitoring center for half an hour.
3)
Power
Power module is used to transform AC power to +6V, +28V DC power. It should send alarm to
CPU board while the AC power is off. AC input range: 160VAC - 285VAC
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Part II: Software
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1.Repeater OMT Software guide steps
1.1 Step 1: Preparation before commissioning
a. Copy the OMT and USB_driver files from the accessory CD to your computer.
b. Connect the optical path between the Master Unit and the Remote Unit.
Master Unit and Remote Unit have many ways of connecting fiber optic cables. According to project
needs, you can connect a Master Unit with 1-4 Remote Units.
The following describes the most complicated 1 drag 4 connection debugging method. Other
connections may refer to it.
The 4 FC/APC Optical Connectors of a Master Unit are connected with 4 Remote Unit FC/APC at
both ends
1.2 Step 2: Install USB driver
a. Double click the "usb_driver" folder, you will see two files "CP210xVCPInstaller_x64" and
"CP210xVCPInstaller_x86". If your computer is a 64-bit system, double-click "x64", if your computer
is a 32-bit system, double-click "x86".
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b. Press "Next" until the installation is complete
1.3 Step 3: Connect repeater to computer
There are two ways: a or b.
a. One end of the data line is connected to the mini-usb (Settings) interface at the positive of
Optical Master Unit and the other end is connected to the computer USB interface.
b. One end of the data line is connected to the USB interface in the red circle at the bottom of the
Remote Unit, and the other end is connected to the computer's USB interface.
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1.4 Step 4: Running “CenRF-OMT software”
( Debugging the Master Unit as an example)
a. Double click the "CenRF-OMT-3.6.6", Double click on the OMT icon file
.
b. Click in turn "Open Serial", "Test Link", "Parameter List", "Device Information".
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c. Click the small box before "all" to tick, Click "Query", you can see the factory settings.
d. Click "Network", repeat step c. (Click "Alarm Enable", repeat step c. and so on.) you can see
factory settings for each interface.
e. Click "Set Param", the first time you log in you must install the design modification "UL
attenuation value " and "DL attenuation value". Click the small box them to tick. Click "Set".
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f. Click "Network", If you want to join the network polling, insert the SIM card into the card slot
Set the number of the network management center, telephone number1-numeber5, click “Set”.
Enter the SIM card number in "Report number", click "set".
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g. There are two ways to connect to the remote unit.
① The first way is to connect the data line to the Master Unit, and then enter the remote unit
number in “Device”. The factory default is “01”. click “Parameter List”.
If you set the Remote Unit through the Master Unit for the first time, disconnect the other three fiber
ports. Then modify 01 to 02 in "Equipment number". click “Set”.
Change the connected fiber port and change "Equipment number" to 03 or 04 in the same way until
the " Equipment number" of all the connected remote units are different.
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After setting, you need to switch to the Master Unit, enter "00" in "Device Number", then click "
Parameter List". If you need to switch to the "01" Remote Unit, enter "01" in " Device Number ",
then click "Parameter List", and so on.
② The second way is to connect each remote unit with a data cable, and change " Equipment
number " to 02, 03 or 04, click “Set”.
h. Repeat steps a-d to check the factory settings of the Remote Unit.
i. If you are debugging the Remote Unit for the first time, you must modify "UL or DL attenuation
value" according to the design.
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j. Finally, you can view the upstream and downstream attenuation and gain values in "Real-time
Sampling" in real time.
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Part III: Maintenance
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1. Maintenance and Repair notes
l Disassembling the system
Cut off the outside air circuit breaker;
Pull out the power plug of the repeater;
Don’t operate under thundercloud;
l Cleaning
Cut off the outside air circuit breaker;
Pull out the power plug of the repeater;
Don’t clean the system with the liquid to prevent from short circuit;
Use the dry cloth.
l Grounding
Use grounding power plug (3-point plug).
l Power
Pay attention to voltage and frequency of outside power. Check whether they are compliant
with the repeater.
l Parts Replacement
Users shouldn’t repair the system or replace the parts themselves. They may get an electric
shock while disclosing the system. Only authorized specialist can implement repair and
replacement.
l Waterproofing and humidity proofing
Don’t power on/off under humid condition while the door is open.
2. Emergency Measures
It is suggested to turn off the repeater system under following conditions
l Power supply not working.
l Rain or liquid flow into the repeater.
l Abnormal phenomenon like overheated, peculiar smell, abnormal sundries)
l Case impaired;
l Performance fell;
l Near by fire;
l Flooded.
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3.Troubleshooting guide
How to detect failures
Check the repeater to detect the failed part of the repeater:
Repeater
Failure
Alarm LED
Green
Red
Off
Not
working
Adjust antenna
and cable until
it works
Not
working
Check antenna
and cable
status
Check
repeater status
through OMT
Ok
Check power
supply status
Adjust Power
Supply until it
works
Ok
Contact
Repeater
Supplier
The End of the Document
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