Cenrf Cew-p10 User manual

CEW-P10 ~ CEW-P20

WCDMA Series

Band Selective Pico Repeater

User’s Manual

Page 2 of 24

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

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

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8. Installation

CEW-P10 ~ CEW-P20 micro repeater should be used to cover the area indoor and the humidity and

temperature of working can affect the reliability of repeater. So, temperature, humidity, dust,

interference, power, space requirements and other factors should be considered during installation

of repeater.

8.1. Installation Location Requirement

1) It is appreciated that the repeater is installed in a cool, dry and ventilated room without erosive gas and

smoke and without leakage on its proof.

2) Besides above, a cool and ventilated wall of which sun-proof and waterproof is expected.

3) Besides above, common wall, tower or high pole is ok.

4) Installation height should be easy for RF cable wiring, heat dissipation, security and maintenance.

5) Have a set of independent and stable power supply.

6) Have lightning conducer in the building, tower or high pole with enough strength or stability.

8.2. Power requirement

Generally it is AC power supply，and the requirement of AC is 100~264VAC/50±5Hz

8.3. Installation tools and accessory

No. Name Specification Quantity Remark

1 Plastic Expansion Bolt M5*24 6 Standard accessories

2 Tapping screw M3*27 4

Standard accessories

3 Hanging folder 1

Standard accessories

4 reciprocating drill 1

Engineering-owned, punch the

wall

5 Shot bit M3 1 Engineering-owned, punch the

wall

8.4. Installation of donor antenna

The repeater’s main function is to improve weak RF signals to an area. A simple formula: Input power+ Gain=

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Output power. The signal strength from the outdoor antenna directly affects the efficiency of the indoor coverage.

It is very important to choose the location of the outdoor antenna carefully. With this in mind, it is not

recommended the donor antenna to be installed in an attic.

Testing the signal strength received from donor antenna mounted in site by mobile phone:

Please select the top of the building to install the donor antenna if the total floors are less than 7,

and must select a place like balcony or platform lower than 7th floor for the donor antenna if the

buildings are over 7 floors.

The mobile phone shall display full bar signals in location where the donor antenna is installed

The phone calls or data transmission are smooth and stable by 3 times testing in location where

the donor antenna is to be installed

As shown from the above illustration, testing the signals from A to E, and select a best place that

displays full bar signals to install the donor antenna.

Selection the installation direction of donor antenna

The donor antenna shall point to the direction of the tower, and it would be much better to keep

line of sight.

Please select the opposite directions for donor antenna and server antenna. If donor and server

antennas have to be installed in the same direction, please install them only after the signal

quality is tested and the self-oscillation is avoided. If the directional antenna is selected, the

main directional angle should point to the tower antenna.

If the performance is poor due to weak signals or poor phone call quality after installation, please

adjust the direction of donor antenna or change its installation position in order to obtain the best

calling effect.

Donor antenna installation ---Notes:

Do not install the donor antenna during the rainy day with lightning.

Please follow the instructions to install the donor antenna.

It is a must that the waterproof shall be done to connectors of donor antenna and feeder lines.

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In order to avoid interference, please note that the donor antenna should be far away from the

following objects.

Metal

High-voltage line

RF antenna

High-voltage transformer

Repeater is a two-way signal amplifier. So proper isolation between donor antenna and server

antenna is necessary in order to avoid self-oscillation. About the definition for self-oscillation,

take MIC and loudspeaker for example; if it is too close for each other, it could make big noise.

So the repeater can run smoothly if the isolation between donor antenna and server antenna is

15 dB higher than the gain of booster. For example, if the booster gain is 60 dB, then the

isolation between donor antenna and server antenna should be 75 decibel.

The minimum distance between donor antenna and server antenna is 10 meters, again the

direction of donor and server antennas shall be opposite.

As shown in the below illustration, the booster amplifies the signal R and signal T from the tower

at the same time. If the distance between donor antenna and server antenna is less than the

required distance, then the amplified signal R (T) will back to server antenna (donor antenna). So

it will lead to self-oscillation and reduce the coverage area, also the bad calling quality could

happen at the same time.

If isolation can’t be achieved by the limited distance, the roof of the building or other barriers can

be used to increase isolation.

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Installation of panel antenna as donor antenna

Installation of wide directional antenna as donor antenna

Installation of YAGI antenna as donor antenna

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Test the call quality of donor antenna

Fix the donor antenna after selecting the best position, and adjust slightly its height or angles in

order to get the signals with suitable input power level and calling Quality

System Requirement of WCDMA or AWS

1) The total input power level shall be around -50dBm, lowest shall be more than –70dBm

2) Test by mobile phone or data card by 3~5 times to make sure Ec/Io is more than -6 dB

~–7dB, and no handovers.

3) Ec/Io of adjacent carrier shall be 8dB less than that of donor carrier to avoid soft

handover. The active PN shall be only 1.

8.5. Cable layout and connector assembly

1) Keep the type, specifications, routing direction, location, and curvature radius of cables in compliance with

the design requirement. Place cables in good order, bend them smoothly, and protect the outer skin against

any damage.

2) Bind cables in good order when laying them on cable racks. Keep cables within cable troughs, without any

cross, when you do not bind them. When leading cables in or out of troughs, use a hole-opener to open

cable troughs and then install PVC lock-nuts to protect them.

3) Keep horizontal cables straight and fasten them stably with a fixing clip every 1 to 1.5 meters, with a proper

stress.

4) Bind and fasten vertical cables every two to three meters to avoid damaging cables or connectors owing to

their own heavy weight. Take back the cables and re-lay them when you have difficulty in pulling them, and

avoid using a strong force to pull them.

5) Separate RF cables from power cables. Take proper isolation measures if they have to be placed on the

Lightening

Test Engineer Phone

Page 16 of 24

same cable racks owing to the site condition restriction.

6) Correctly fasten all connection parts of the whole system, from the antenna to active interfaces to passive

interfaces, and keep electrical interfaces well contacted. Give waterproof treatment to outdoor connection

parts.

7) Take lightning protection measures for the antenna and feeder system in accordance with the design

requirement. Avoid deforming the antenna feeder where grounding clips are placed, and give waterproof

treatment to the feeder.

8) Keep exposed indoor cables in good order. Install PVC troughs or tubes if the exposed cables are more

than 1 meter long. Place small passive RF parts such as power splitter in cable troughs.

9) Process both ends of RF coaxial cables as follows:

Keep the same redundant cable length and keep the length of stripped cables to agree with the

corresponding connectors.

Use a proper force to cut the jacket layer or insulation layer and avoid damaging the braid shielded net and

cores.

Weld cores firmly and smoothly with a proper amount of solder, without solder projections or nodules.

Assemble coaxial cables strictly in accordance with the installation specifications.

Keep a moderate length of heat-shrinkable tubes and heat-shrink the tubes evenly when adding

heat-shrinkable tubes to the end of cables.

Protect the ends of cables against water and dampness. Use waterproof tape to give waterproof treatment

to exposed cable ends. Cut off the end if it is dampened or water-soaked.

8.5. Indoor antenna installation

Proper antennas shall be selected according to the site conditions and the requirement.

1) Omni antenna (Indoor ceiling omni antenna or whip antenna), suitable to installed in the center and radiate

all directions

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2) 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)

8.6 Repeater Installation

8.4.1. Installation Steps

CEW-P10 ~ CEW-P20 shall be installed in indoor areas only

1) Drill four holes as per the bracket size on the location where the repeater shall be installed and input

expanding plastic.

2) Fasten the bracket vertically onto the wall by the screws

3) Hang the repeater onto the bracket. (The other bracket is installed onto the back side of the repeater)

4) Connect the power supply and the cables properly to the repeater ports

5) Check again to make sure the repeater is installed firmly and repeater alarm LED is green.

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8.4.2. Repeater’s ports description

1) Outdoor port: connected with the donor antenna by cable

2) Indoor port: connected with server antenna directly or by cable

3) DC IN: connected with power supply.

8.4.3. Accessories selection

Please pay attention to the two points of “frequency” and “impedance” during the selection of the accessories.

All accessories shall support the repeater’s frequencies from feeder line, antenna and splitter to combiners etc.

For example, the repeater’s frequency is WCDMA, so all the accessories must support the WCDMA

1920-2170MHz frequency. And the repeater’s impedance is 50ohm, so the accessories shall all be 50ohm. To

use any other impedance of coax will put an extra load on your repeater, shorten its life span and decrease the

system performance.

8.5. Repeater Settings

Please check very carefully all cable connections are correct and firm before running operation test and then

carry out following tests

8.5.1. Switch on power

After power is on, check firstly the alarm and power LED’s.

Status and definition of POWER indicators:

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Status and Definition of ALARM indicators,

Status ALARM

It is working in linearity

Green

attention: Input signals may be not enough

Red There are overloading or self oscillation, strong input signals, measures shall

be taken

Orange Slight stronger input signals or slight self oscillation have accured

Off Repeater break down, or deep self oscillation leads to auto mute

Remark:

For WCDMA system, only “Alarm High” LED works,

Please note that Alarm LED works on repeater downlink signals only, I.E. the repeater input signals

from NODE B.

Status Definition

Green Normal

Off DC power problem

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8.5.2.Manual Gain Control (MGC)

DIP switch uplink attenuation setting:

Att 1 2 3 4 5 Att. 1 2 3 4 5 Att. 1 2 3 4 5

0 dB off off off off off 11dB ON ON off ON off 22dB off ON ON off ON

1 dB ON off off off off 12dB off off ON ON off 23dB ON ON ON off ON

2 dB off ON off off off 13dB ON off ON ON off 24dB off off off ON ON

3 dB ON ON off off off 14dB off ON ON ON off 25dB ON off off ON ON

4 dB off off ON off off 15dB ON ON ON ON off 26dB off ON off ON ON

5 dB ON off ON off off 16dB off off off off ON 27dB ON ON off ON ON

6 dB off ON ON off off 17dB ON off off off ON 28dB off off ON ON ON

7 dB ON ON ON off off 18dB off ON off off ON 29dB ON off ON ON ON

8 dB off off off ON off 19dB ON ON off off ON 30dB off ON ON ON ON

9 dB ON off off ON off 20dB off off ON off ON 31dB ON ON ON ON ON

10 dB off ON off ON off 21dB ON off ON off ON

DIP switch downlink attenuation setting:

Att 6 7 8 9 10 Att. 6 7 8 9 10 Att. 6 7 8 9 10