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Table of Contents
Related Manuals for CenRF CEW-P10
Summary of Contents for CenRF CEW-P10
- Page 1 CEW-P10 ~ CEW-P20 WCDMA Series Band Selective Pico Repeater User’s Manual...
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Page 2: Table Of Contents
SYSTEM CHARACTERISTICS ............................6 4.1. ：................................6 EATURES 4.2. CEW-P10 ~ CEW-P20-W ....................6 PPEARANCE OF REPEATERS BLOCK DIAGRAM AND WORK PRINCIPLE........................7 THE REPEATER SYSTEM .............................8 CEW-P10 ~ CEW-P20 MAIN TECHNICAL SPECIFICATION..................9 7.1............................9 ECHANICAL SPECIFICATION 7.2............................9 NVIRONMENT ONDITIONS 7.3.............................9 TECHNICAL SPECIFICATION 7.4. -
Page 3: Safety Warnings
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. -
Page 4: Why Repeater
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. -
Page 5: Introduction
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. -
Page 6: System Characteristics
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 Page 6 of 24... -
Page 7: Block Diagram And Work Principle
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. -
Page 8: The Repeater System
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. -
Page 9: Cew-P10 ~ Cew-P20 Main Technical Specification
7. CEW-P10 ~ CEW-P20 Main technical specification 7.1. Mechanical specification Item specification Dimensions 218x 155 x 65 mm Weight 1.2 kg Environment Conditions IP54 Cooling mode Nature cooling 7.2. Environment Conditions Item specification Operating Temperature -25°C to +55°C Storage Temperature -40°C to +80°C... -
Page 10: Requirements For Adapters
f_offset Maximum Gain 2.7≦f_offset＜3.5MHz <60dB Out of Band Gain 3.5≦f_offset＜7.5MHz <45dB 7.5≦f_offset＜12.5MHz <45dB 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... -
Page 11: Installation
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. - Page 12 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. ...
- Page 13 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.
- Page 14 Installation of panel antenna as donor antenna Installation of wide directional antenna as donor antenna Installation of YAGI antenna as donor antenna Page 14 of 24...
- Page 15 Test the call quality of donor antenna Lightening Test Engineer Phone 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 ...
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Page 16: Indoor Antenna Installation
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. -
Page 17: Repeater Installation
(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 Drill four holes as per the bracket size on the location where the repeater shall be installed and input expanding plastic. -
Page 18: Repeater's Ports Description
8.4.2. Repeater’s ports description Outdoor port: connected with the donor antenna by cable Indoor port: connected with server antenna directly or by cable 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. - Page 19 Status Definition Normal Green DC power problem Status and Definition of ALARM indicators, Status ALARM It is working in linearity Green attention: Input signals may be not enough There are overloading or self oscillation, strong input signals, measures shall be taken Orange Slight stronger input signals or slight self oscillation have accured...
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Page 20: Manual Gain Control (Mgc)
8.5.2. Manual Gain Control (MGC) DIP Switch attenuation Downlink attenuation Uplink attenuation DIP switch uplink attenuation setting: Att. Att. 0 dB off 11dB off 22dB off 1 dB off 12dB off off 23dB 2 dB off 13dB off 24dB off 3 dB ON ON off 14dB off... -
Page 21: Repeater Commissioning
8.5.3. Repeater Commissioning Testing Effective Downlink Path Loss The downlink path loss between NODE B and the donor antenna is as follows: is the downlink signal power received at the donor end) D-link NODE B donor donor Suppose: The maximum transmitting power of NODE B is 20 W and the overhead power accounts for 10%. -
Page 22: System Test
Set G2=P -7dB DL MAX NODE B PORT Pilot CH “-7dB” explanation: pilot signal of WCDMA system only takes up 10% of the NODE B total output power, and shall be set at 50% capacity, then the gain shall be set according to the input power level of Pilot CH in order to avoid breathing effect, therefore there will be 5dB left from the total output power to leave the capacity to traffic channels C. -
Page 23: Repeater Can Not Communicate In Power-On Status
Check whether it is necessary to add one or more antenna to enhance the coverage of special areas. Test coverage 1) Mobility Service antenna 2) increase the number of service Check the signal antenna strength is fit 3) reduce the attenuation values 4) increase the output power 1) Mobility Service antenna 2) increase the number of service... - Page 24 Thirdly reduce the repeater’s gain by ATT DIP if the above methods don’t work The best minimum distance between donor antenna and serve antenna should be more than 10 meters. The following measures can also be tried: Use the roof of the building to enlarge the isolation (Please try to place the donor antenna and server antenna in different floors) ...