CenRF CEW-P10 User manual

CEW-P10 ~ CEW-P20
WCDMA Series
Band Selective Pico Repeater
User’s Manual

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Contents
1. SAFETY WARNINGS .....................................................................................................................................................3
2. WHY REPEATER............................................................................................................................................................4
2.1. REASON 1 .................................................................................................................................................................4
2.2. REASON 2 .................................................................................................................................................................4
3. INTRODUCTION.............................................................................................................................................................5
4. SYSTEM CHARACTERISTICS......................................................................................................................................6
4.1. FEATURES：..............................................................................................................................................................6
4.2. APPEARANCE OF CEW-P10 ~CEW-P20-W REPEATERS ............................................................................................6
5. BLOCK DIAGRAM AND WORK PRINCIPLE................................................................................................................7
6. THE REPEATER SYSTEM.............................................................................................................................................8
7. CEW-P10 ~ CEW-P20 MAIN TECHNICAL SPECIFICATION........................................................................................9
7.1. MECHANICAL SPECIFICATION.......................................................................................................................................9
7.2. ENVIRONMENT CONDITIONS........................................................................................................................................9
7.3. RF TECHNICAL SPECIFICATION ....................................................................................................................................9
7.4. REQUIREMENTS FOR ADAPTERS：............................................................................................................................10
8. INSTALLATION.............................................................................................................................................................11
8.1. INSTALLATION LOCATION REQUIREMENT .................................................................................................................... 11
8.2. POWER REQUIREMENT ............................................................................................................................................. 11
8.3. INSTALLATION TOOLS AND ACCESSORY....................................................................................................................... 11
8.4. INSTALLATION OF DONOR ANTENNA............................................................................................................................ 11
8.5. INDOOR ANTENNA INSTALLATION ....................................................................................................................................16
8.6 REPEATER INSTALLATION ...............................................................................................................................................17
8.4.1. Installation Steps............................................................................................................................................17
8.4.2. Repeater’s ports description ..........................................................................................................................18
8.4.3. Accessories selection.....................................................................................................................................18
8.5. REPEATER SETTINGS ...............................................................................................................................................18
8.5.1. Switch on power.............................................................................................................................................18
8.5.2. Manual Gain Control (MGC) ..........................................................................................................................20
8.5.3. Repeater Commissioning...............................................................................................................................21
8.6. SYSTEM TEST ..........................................................................................................................................................22
8.6.1. Check whether the coverage is good.............................................................................................................22
8.6.2. Repeater can not communicate in Power-ON status.....................................................................................23

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Preface
This user’s manual describes the installation, commissioning and maintainance of
CEW-P10 ~ CEW-P20 repeaters.
Please do read the user manual carefully before installing and maintaining CEW-P10 ~
CEW-P20 repeaters.
The information in this manual is subject to change without prior notice
Opinions are welcomed about the manual improvement.
1. Safety Warnings
Users must follow the below principles：
Repeater should follow system requirement of communication equipment, assure good
groundings and lightning protection.
The power supply voltage of repeater should meet the standards of security requirement; any
operation shall be carried out only after cutting off power in advance. Only the professional is
authorized for the operation.
Do not dismantle machine, maintain or displace accessories by yourself, because in
this way, the equipment may be damaged or even get an electric shock.
Do not open the repeater; touch the module of repeater, or to open the cover of
module to touch the electronic component, the components will be damaged due to
electrostatic.
Please keep away from heating-equipment, because the repeater will dissipate heat during
operation. And do not cover booster with anything that influences heat-dissipation.

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2. Why repeater
2.1. Reason 1
1) Blind or weak signal areas are formed if the buildings are too far away from BTS, or the buildings
themselves shield or absorb the signals.
2) There are too many complicated signals in the higher part of the buildings, therefore ping-pong switching
effect has been formed and the signals fluctuate a lot, there are annoying noises during phone calls and
there are dropped phone calls accordingly.
3) Elevators and basements are well-known blind areas.
4) Downtown areas of the cities, congested with many high-rise buildings are usually the weak or blind
areas.
2.2. Reason 2
The remote villages, mountains, hills, valleys, etc. are mostly scarcely populated areas with quite few mobile
users, so the main target is to send coverage to these areas, and it will not be cost effect to install a BTS tower,
therefore a booster is a quite good option.
Can we not use mobile phones? The answer is definitely NO. But it might be much more miserable that the
communication can’t be achieved due to no or weak signals though there is a mobile phone.
Will your customers stay comfortable when there is no smooth communication in your shops or restaurants?
Will your business be influenced if your clients couldn’t call you through due to weak signals in offices?
Will your life be influenced if your mobile is always “out of service” at home when your friends call you?
How to solve the problems?
Best Solution:
Plug & play: Purchase a set of booster solution and install it at your home, offices, and plug on the
power and immediately you would be able to enjoy the full bar and high quality signals!

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3. Introduction
This CEW-P10 ~ CEW-P20 full duplex mobile communications repeater from CenRF is the perfect solution for
providing a wireless improvement in the cellular reception of a home, office, restaurant, VIP Room, apartment,
building or shopping mall, in the quickest time possible. One repeater covers 300 to 600 square meters.
It is designed to improve the call quality of an area by receiving, amplifying and re-transmitting signals of the
base station into a specified area via the server antenna of the repeater.
This repeater has Manual Gain Control (MGC) feature that enables engineers to reduce the gain of the repeater
manually if oscillation is detected or too strong input power level during installation, this will help to get the best
coverage effect without any interference back to mobile network.
And to maintain safe and specific output signal levels during the repeater’s operation, this repeater has a built-in
signal oscillation detection circuit to adjust the gain automatically so as to avoid interference to the cellular network,
also it gets color changing LED’s indicate its environmental status: the Alarm LED’s located on the front of the unit
(Alarm Low & Alarm High) will change color from green to orange or red, (depending on the input power level) if the
system detects signal oscillation in either band or, if the input signal is beyond a safe limit.
Below diagram shows how simple and fast CEW-P10 ~ CEW-P20 repeater system is installed and works
effectively
One Yagi antenna, as a donor antenna, has been installed at the top of the roof to pick up good mobile signals
from outside, and send through a 8D-FB cable to a CEW-P10 ~ CEW-P20 repeater to be amplified significantly, then
the output signals are divided into two signals by a 2way splitter, sent to two indoor omni antennas and finally
transmitted into the coverage area. Very clear phone call or high speed mobile data services are immediately
effected within the area.

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4. System Characteristics
4.1. Features：
Streamline shape
Excellent out of band rejection.
Wide power supply range and low power consumption
High-integration (One board to contain low-noise amplifier, frequency selection module, power
amplifier module, both uplink and downlink one for all)
Manual gain control provides a variety of applications.
MTBF>50000h, low failure rate
4.2. Appearance of CEW-P10 ~ CEW-P20-W repeaters
Figure 1 the front view (colors may differ from real products).
Figure 2 Side View

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5. Block diagram and work principle
CEW-P10 ~ CEW-P20 is basically a bi-directional amplifier, the downlink signals are received by the repeater
from BTS by the donor antenna, filtered by its internal duplexers and FC unit, amplified by low noise amplifier (LNA)
and downlink PA unit, and then sent via the server antenna to the coverage area. The bandwidth is operators’
working frequency only.
The uplink signal of mobile terminal from the coverage area is input via the server antenna, then filtered by
duplexers and FC unit, amplified by the uplink low noise amplifier (LNA) and the uplink PA unit and finally sent via
the donor antenna to the BTS.
Modules in the system diagram:
Duplexer: The main purpose of duplexer is to combine downlink and uplink to share the same
antennas, the duplexer is composted of one pair of band pass filter that can not only reject the
spurious interference, but also increase the isolation of Uplink and Downlink
LNA: LNA is the first active sub system of the repeater, of which low noise and high linearity is
requested under strong input signals. LNA is the major sub system that determines the noise figure
of the repeater system.
IF Filter: IF SAW filer is adopted in FC sub system to reject signals of other operators to make sure
the signals clean and increase the UL and DL isolation.
PA: The power amplifier sub system helps the repeater to reach its targeted output power, linearity
of which decides the linearity of the repeater
Power supply is to supply power electricity to all repeater’s modules

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6. The repeater system
Donor Antenna：
5~7dbi outdoor panel or 7~9dBi wide band Yagi are recommended as donor antenna.
Function: Pick up donor signals from the BTS and send to the repeater by cable; the received
signals’ power level and quality influence a lot on the coverage effect. Donro antenna also
transmit the uplink signals from the repeater to BTS.
Server Antenna:
2~3dBi indoor omni ceiling or 5~7dBi indoor panel are recommended.
Omni antenna (Indoor ceiling omni antenna or whip antenna), suitable to installed in the center
and radiate all direction; It is better to use a directional panel antenna or Yagi when the coverage
shape is long and narrow (corridors, long row of houses in two sides, tunnels or elevators or rural
open space)
Cables: LMR 300 or 400, 5D or 8D –FB coax cables are recommended.
Splitters or couplers: when the building structure is too complicated or there is big loss due to thick
walls, etc., splitters or couplers shall be used so that more antennas can be installed in more areas
to distribute the signals to each corner of the coverage area.
Power Box including electricity meter, air switch and groundings, some sites might need surge
arrestors.

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7. CEW-P10 ~ CEW-P20 Main technical specification
7.1. Mechanical specification
SN Item specification
1 Dimensions 218x 155 x 65 mm
2 Weight 1.2 kg
3 Environment Conditions IP54
4 Cooling mode Nature cooling
7.2. Environment Conditions
SN Item specification
1 Operating Temperature -25°C to +55°C
2 Storage Temperature -40°C to +80°C
3 Humidity 5% to 85%
4 Air Pressure 86 kPa to 106 kPa
7.3. RF technical specification
Electrical specification Specification
Frequency range 1935.1-1950.1 MHz, 2125.1-2140.1 MHz
Band width 15MHz
CEW-P20 UL≦65dB,DL≦70dB
CEW-P15 UL≦65dB,DL≦65dB
Max.Gain
CEW-P10 UL≦60dB,DL≦65dB
MGC（Step Attenuation）≧31dB / 1dB step
A
utomaticLevelControl ≥15dB,auto shut off after 15dB
Gain Flatness ≦2dB/ 3.84MHz
CEW-P20 UL≦12dBm,DL≦20dBm
CEW-P15 UL≦10dBm,DL≦15dBm
Output Power
CEW-P10 UL≦10dBm,DL≦10dBm

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f_offset Maximum Gain
2.7≦f_offset＜3.5MHz <60dB
3.5≦f_offset＜7.5MHz <45dB
7.5≦f_offset＜12.5MHz <45dB
Out of Band Gain
12.5≦f_offset <35dB
Spurious Emission Mask Comply with 3GPP TS 25.106
Spurious Emission Comply with 3GPP TS 25.106
Modulation Accuracy ≦12.5%
Peak Code Domain Error ≦-35dB@Spreading Factor 256
Output intermodulation Comply with 3GPP TS 25.106
ACRR 20dBc/30KHz@±5MHz & ±10MHz
Frequency stability ≦0.01ppm
Noise Figure ≦6dB
Return Loss ≦-10dB
Group Delay ≦5μs
2、Alarm standard
Power LED DC ON/OFF
DL ALC 1~5dB,orange
LED indication Alarm LED DL ALC 15~20dB,red.
LED off after 5 seconds red color
7.4. Requirements for adapters：
SN Item Minimum Typical value Maximum
1 Input Voltage Range 100 V 220 V 264 V
2 Output Voltage Range 47 Hz 50Hz 63 Hz
3 Total Power Consumption 15W