S37-DB PCS User Manual-Chile

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    5W (37dBm)

    PCS RF Repeater

    2G+3G

    Users Manual

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    1 FOREWORD .............................................................................................................................................. 1

    2 SAFETY WARNINGS................................................................................................................................. 2

    3 OVERVIEW ................................................................................................................................................ 3

    4 APPLICATION SCOPE.............................................................................................................................. 4

    5 REPEATER DESCRIPTION....................................................................................................................... 5

    5.1CHARACTERISTICS ..................................................................................................................................... 55.2APPEARANCE OF REPEATERS ...................................................................................................................... 55.3INTERNAL MODULES ................................................................................................................................... 6

    6 TECHNICAL SPECIFICATIONS................................................................................................................ 9

    6.1STRUCTURAL &POWER TECHNICAL SPECIFICATIONS................................................................................... 96.2ENVIRONMENT CONDITIONS........................................................................................................................ 9

    6.3RFTECHNICAL SPECIFICATIONS ................................................................................................................. 96.4SOFTWARE SPECIFICATIONS......................................................................................................................11

    7 COMPOSITION OF APPLICATION SYSTEM......................................................................................... 12

    7.1MAJOR PARTS INAPPLICATION SYSTEM..................................................................................................... 127.2SYSTEM CONFIGURATION ......................................................................................................................... 12

    8 INSTALLATION DESCRIPTION .............................................................................................................. 13

    8.1MECHANICAL CHARACTERISTICS ............................................................................................................... 138.2INSTALLATION........................................................................................................................................... 138.2.1 Position selection................................................................................................................................ 138.2.2 Power request .................................................................................................................................... 138.2.3 Installation tools and enclosure .......................................................................................................... 138.2.4 Chassis Installation............................................................................................................................. 148.3CONNECTION ........................................................................................................................................... 178.3.1 Electrical Interfaces ............................................................................................................................ 178.3.2 Grounding........................................................................................................................................... 178.3.3 Power supply connecting.................................................................................................................... 188.3.4 System inspection .............................................................................................................................. 18

    9 COMMISSIONING AND MAINTENANCE ............................................................................................... 19

    9.1COMMISSIONING TOOLS ........................................................................................................................... 199.2COMMISSIONING PROCEDURE AND COMMISSIONING BASIS ........................................................................ 199.2.1 Testing VSWR of Antenna and Feeder System ................................................................................. 199.2.2 Obtaining Required Donor Signals by Adjusting Donor Antenna....................................................... 19

    9.2.3 Testing Downlink Received Power at Donor Port of Repeater........................................................... 209.2.4 Testing Effective Downlink Path Loss................................................................................................. 209.2.5 Downlink gain setting.......................................................................................................................... 219.2.6 Uplink gain setting .............................................................................................................................. 229.2.7 Adjusting System Isolation ................................................................................................................. 229.2.8 Detecting Repeater............................................................................................................................. 23

    10 MAINTENANCE ..................................................................................................................................... 24

    10.1INTEGRATED MODULE............................................................................................................................. 2410.2REPEATERS WORKING FREQUENCY SETTING ........................................................................................... 2410.2.1 Driver installation .............................................................................................................................. 2410.2.2 Cable connection.............................................................................................................................. 2410.2.3 Software operation ........................................................................................................................... 24

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    PCS 2G+3G RF Repeater (37dBm) Users Manual

    1 Foreword

    This manual describes the installation, operation, commissioning, and maintenance of theS37-DB radio repeater.

    Before installing and operating the S37-DB repeater, please read this manual carefully.

    Note about this manual:

    No part of this manual may be reproduced or transmitted in any form or by any means.

    The information in this manual is subject to change without notice.

    Suggestions on this manual are welcome.

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    2 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 securityrequirement; any repeater-operator can operate only after cutting power inadvance. Only the professional can operate electrified.

    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, even not to open thecover of module to touch the electronic component, the components will bedamaged due to electrostatic

    Please keep away from heating-equipment, because the repeater willdissipate heat when working. And do not cover repeater with anything thatinfluences heat-dissipation.

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    3 Overview

    Nowadays personal mobile communication is developing faster than ever, and people arehaving higher requirements on mobile communication. A high-speed and large-capacitycommunication system has become the trend of future development. Presently, thesecond-generation mobile communications system, GSM, is widely used all over the world.There will be no, definitely, breakthroughs in the improvement of its communication rateand capacity.

    As a third-generation mobile communication technology, WCDMA is widely used inEurope, North America and Korea. The Code Division Multi Access (CDMA) technology

    used in WCDMA greatly extends the signal width -- the so-called spread spectrummodulation. As an advanced wireless communication technology, WCDMA features goodmulti-channel access capability, anti-multipath fading capacity, anti-narrowbandinterference capability and security protection capability.

    The WCDMA network has the cell breathing effect. That is, the coverage will graduallyshrink as the cell load increases. The cell breathing effect makes network planning morecomplicated. The CDMA technology itself determines that the load of the WCDMA networkat the early stage of construction should be higher than that of the GSM network.Therefore, adding carriers is a major means of the WCDMA network capacity expansion,and adding Node B base stations is an auxiliary means of capacity expansion. TheWCDMA radio network should provide a continuous coverage, instead of hotspotcoverage.

    The cost of a repeater is low and the construction is simple, it has the functions of a miniNode B. On the WCDMA network, repeaters can help Node B to achieve the optimalnetwork quality at the minimum cost.

    The WCDMA system features large capacity and small coverage. After a Node B isconstructed, the capacity is large, but the coverage radius is small. Therefore, the numberof users who access it is very small. In this way, a large amount of channel resources arewasted. The best way of solving this problem is to use repeaters to extend the coverageradius to fully utilize the telecommunication resources. For example, in the WCDMAnetwork construction in China, repeaters are not considered as peripheral devices tocover blind areas any longer, but a part of the network.

    The complete coverage is not only a prerequisite for a high quality mobile cellular network,

    but also a factor that attracts users. From this point of view, a network operator should firstconsider providing a radio network with a complete coverage. The seamless coverage inurban areas, heavy traffic areas, office buildings, super markets, and top grade hotels isthe first step to consummate the network.

    In such a background, we successfully developed the 37dBm repeaters that areapplicable to the WCDMA+PCS indoor distributed system.

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    4 Application Scope

    Wireless repeater is a common method for mobile network optimization, mainly used forextension the coverage for BTS and eliminate the blind areas. Compare to BTS, thefeatures are: low engineering cost, short construction period, simple installation andmaintenance.

    S37-DB is also equipped with industry grade remote and monitoring function, to realize thefunctions as setting the repeater, power switch, store all the diaries for alarms andoperating, repair dealing, to get the operating status for all the repeaters on time, it cangreatly save times for operator to maintain, and timely to maintain the stable operating ofequipment. So when many equipments from Huaptec are being used in one city, they canbe controlled and monitored by unified management.

    Base station coverage areaRepeater coverage area

    repeater

    Donor ant. Server ant.

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    5 Repeater Description

    5.1 Characteristics

    Full modulated design, easy maintenance, and flexibility repair

    Leading power amplification linear technology

    Low consumption and high selectivity

    Advanced microwave design, stable and reliable product performance

    Working frequency of the repeater can be moved by local USB or remote monitoring

    interface

    5.2Appearance of repeaters

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    5.3 Internal Modules

    S37-DB multi-band Select repeater is actually a mobile communication signal relayamplification device with the same frequency. It has two separate internal amplificationlinks, uplink (or forward link) and down link (or reverse link). Downlink receives signalsfrom BTS (Adopt donor antenna and BTS by air coupling), send the signals to coveragearea after amplification. At the same time, the uplink receives the signals from MS throughserver antenna. After amplification, the signals are sent back to BTS through donorantenna. Thereby smooth and clear communication is achieved.

    Within the device, there are four independent selection modules for each uplink anddownlink. Corresponding to various combinations of PCS and WCDMA.

    Remark: The working frequency for S37

    Band1Uplink:1850-1865MHzDownlink1930-1945 MHzcan provide 3 WCDMA

    channels or 75 GSM channels. Please reference the following illustration.

    Band 2Uplink1895-1910 MHz:Downlink1975-1990 MHz, can provide 3 WCDMA

    channels or 75 GSM channels.

    Channel Channel No. Channel Centre fre uenc

    U link 12 1852.5MHzA

    Downlink 412 1932.5 MHz

    B U link 37 1857.5 MHz

    1850 1865 1895 1910U link MHz

    Downlink MHz1930 1945 1975 1990

    A B C D E F

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    Downlink 437 1937.5 MHz

    U link 62 1862.5 MHzC

    Downlink 462 1942.5 MHz

    U link 237 1897.5 MHzD

    Downlink 637 1977.5 MHz

    U link 262 1902.5 MHzE

    Downlink 662 1982.5 MHz

    U link 287 1907.5 MHzF

    Downlink 687 1987.5 MHz

    According to the systems requirements, should select 5MHz to provide the service ofWCDMA, and the leftovers for 25 MHz provide PCS service. So there are several possible,

    the FC modules will be set automatically as shown in the following illustration.

    WCDMA Band PCS BAND 1 PCS BAND 2 PCS BAND 3

    A Close B+C:10M model D+E+F

    B A C:5M model D+E+F

    C Close A+B:10M model D+E+F

    D Close E+F:10M model A+B+C

    E D F:5M model A+B+C

    F Close D+E:10M model A+B+C

    Specific functions for all the modules as shown in the following illustration:

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    Duplexer: The main purpose of duplexer is to combine downlink and uplink to share thesame antennas, the duplexer is composted of one pair of band pass filter that can not onlyreject 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 highlinearity is requested under strong input signals. LNA is the major sub system thatdetermines the noise figure of the repeater system. S37 LNA module including thefunctions for 4-way splitter and 4-way coupler.

    FC (band selective module): SAW filer is adopted in FC sub system to reject signals ofother operators to make sure the signals clean and increase the UL and DL isolation. S37includes 4 groups of FC modules.

    HPA: The power amplifier sub system helps the repeater to reach its targeted outputpower, linearity of which decides the linearity of the repeater

    Power supply is to supply power electricity to all repeaters modules

    Control unit is to do sampling of repeaters internal modules and send correct feedback oralarms to engineers through its USB or Modem, and can also indicate some statusthrough LED. Control panel also sends orders from the engineers to monitor and configurethe repeaters.

    Wireless MODEM is to provide remote communication between the control panel andremote OMT software.

    Battery: the battery enables the control panel and its wireless modem to work for over 4hours when main electricity is off.

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    6 Technical Specifications

    6.1 Structural & Power Technical Specifications

    1 Dimensions 565x 400 x 180 (mm x mm x mm)

    2 Weight 35 kg

    3 Grade of protection IP55

    4 Heat dissipation mode Natural dissipation

    5 Input voltage range AC 90~290V

    6 Frequency range 47-63Hz

    7 Overall power consumption 280 W

    6.2 Environment Conditions

    1 Operating temperature -25C to +55C

    2 Storage temperature -40C to +80C

    3 Relative humidity 5% to 95%

    4 Pressure 86 kPa to 106 kPa

    5 Odor No smell or no poisonous gas

    6.3 RF Technical Specifications

    Uplink Downlink

    Band 1 1850.1~1864.9MHz 1930.1~1944.9MHzFrequency Range

    Band 2 1894.9~1909.9MHz 1974.9~1989.9MHz

    PCS 85dB 90dB Max .Gain

    WCDMA 85dB 90dB

    PCS 20dBm 37dBm Max .Output Power

    WCDMA 20dBm 37dBm

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    PCS 5or10M, 5M, 15M (5or10MHz by switch)Band width (-3dB)

    WCDMA 5M moved around within A & C Band

    WCDMA UARFCN UL9262 - 9538 , additional 12, 37, 62, 87, 112,137,162, 187, 212, 237, 262, 287

    WCDMA UARFCN DL9662 - 9938 , additional 412, 437, 462, 487,512, 537,562, 587, 612, 637, 662, 687

    MGCStep Attenuation 31dB / 1dB step

    Automatic Level Control 15dB, auto shut o ff after 15dB

    PCS

    5dB (p-p)Gain Flatness

    WCDMA [email protected]

    Noise Figure 6dB

    Return Loss (Min) -14 dB

    Group Delay 5s

    Frequency stability 0.01ppm

    400KHz 30dBc

    600KHz 40dBc

    1MHz 50dBc

    PCS Out of BandRejection

    5MHz 50dBc

    9KHz~1GHz -36dBm @ 3KHzPCS IntermodulationProducts

    1GHz~12.75GHz -45dBc @ 3KHz

    9KHz~1GHz -36dBm @ 3KHzPCS SpuriousEmission

    1GHz~12.75GHz -30dBm @ 3KHz

    f_offset

    2.7 f_offset 3.5MHz

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    12.5 f_offset

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    7 Composition of Application System

    7.1 Major Parts in Application System

    Donor antenna

    Server antenna

    Repeater

    Lightning arrester

    RF coaxial cable

    AC power

    7.2 System Configuration

    AC PowerRepeater

    Donor ant. Server ant.

    Lightning arresterLightning arrester

    Coaxial cableCoaxial cable

    Jumper cables

    BTS MS

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    8 Installation Description

    8.1 Mechanical Characteristics

    The cabinet of the repeater is given sandblasting treatment.

    The overall cabinet is characterized by the following:

    Radiation protection

    Natural heat dissipation

    Length (mm) Width (mm) Height (mm) Weight (kg)

    565 400 180 35

    8.2 Installation

    S37-DB wireless repeater is applied to source for indoor distribution system and outdoorareas coverage, air humidity and temperature may affect the reliability of repeater. So theinstallation should take full account of temperature, humidity, dust, interference, power,space requirements.

    8.2.1 Position selection

    Install in the place that not easy to be reached by irrelevant people.

    Install the place that is convenient for power supply and cabling.

    Avoid heat source and moist environment.

    Install at the draught space, hang on the wall or mast vertically in order to assure goodheat distribution. The upper should keep away from the wall more than 50cm, and theunder should be over 100cm away from the wall during hanging on the wall.

    8.2.2 Power request

    AC power supply of 90~290VAC/505Hz.

    8.2.3 Installation tools and enclosure

    Installation tools

    Adjustable wrench Socket wrench s=6 Phillips screwdriver

    Diagonal pliers Diagonal pliers Sharp-nose pliers

    Tool for preparing cables Scissors Crimping tool

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    (specially for Andrew cables)

    Installation materials

    3-meter-long waterproof insulation tape Installing support andfittings

    Copper lug

    Indoor cable ties

    In addition, the following are required for the system grouping:

    Lightning arrestor Grounding rod

    (angle steel)

    Grounding flat steel

    Grounding down lead

    8.2.4 Chassis Installation

    Installation on the wall

    A. Installation dimension

    B. Installation block diagram

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    C. installation procedure:

    1) According to 300*460mm back shelf installation position, drill 4 *M8 holes on thewall, assembly 4 pieces expansion screws.

    2) Put the rack onto the 4 expansion screws, to fix it on the wall with nuts.

    3) The repeater hang along the bayonet on mounting bracket, then install two hexscrews through the holes from mounting bracket and fixing nut rod of host,tightening screws and fix the host onto the mounting bracket.

    4) Ensure the firm and correct installation.

    Mast installation

    A.Rod diameter: 3.5-6 inch.

    B.Modify the rack according to The following chart

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    C. Fasten the rack tightly to the vertical rod

    D. Installation procedure:

    1) Tighten the clamp with bolt on the mast or pole.

    2) Fix the bracket on the clamp with 6 pcs expansion M880 screws.

    3) The repeater hang along the bayonet on mounting bracket, then install two hex

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    screws through the holes from mounting bracket and fixing nut rod of host, tighteningscrews and fix the host onto the mounting bracket.

    4) Ensure the firm and correct installation.

    8.3 Connection

    8.3.1 Electrical Interfaces

    After finishing installation GSM wind band wireless repeater, interface panel down.

    RF cable connecting:

    BTS portN-Female, Connecting BTS port with cables from donor antenna(BTS direction)

    MS port N-FemaleConnecting MS port with cables from server antenna( users

    direction)

    Lightening Arrestor can be installed if necessary

    8.3.2 Grounding

    Connect one the end of a copper wire with the intersection of grounding screw, andconnecting the other end with grounding system of the building, it is requested that thegrounding impedance shall be less than 10 Ohm.

    BTS port: To donor antennaMS port: To sever antenna

    Ground columnAC IN: AC Power

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    8.3.3 Power supply connecting

    Installation of air switch is recommended for the convenience of power supply switch off.

    Please use three-pin plug to assure the good grounding.

    Please connecting repeater shell and grounding wire with grounding screw, nut andwasher.

    Lightening arrestor can be installed if necessary.

    8.3.4 System inspection

    After installation, inspection as following:

    Grounding impedance < 10.

    Shell, antenna plug, cable, bracket can close to grounding.

    Lightening for power wire.

    Lightening for building.

    Lightening for cable and antenna.

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    9 Commissioning and Maintenance

    9.1 Commissioning Tools

    Commissioning tools and instruments

    VSWR tester and fittings Spectrum analyzer

    (MS2711B)

    Multimeter

    Signal generator Test cable Notebook PC

    Drive test devices Compass Wrench and safety belt

    9.2 Commissioning Procedure and Commissioning Basis

    9.2.1 Testing VSWR of Antenna and Feeder System

    The maximum VSWR of the antenna and feeder system that is tested at the donorantenna and the transmitting antenna should be less than 1.5. Otherwise, check whetherall interfaces of the antenna and feeder system are connected tightly or whether the

    feeder is intact.

    9.2.2 Obtaining Required Donor Signals by Adjusting Donor Antenna

    Connect the donor antenna to the external antenna port of the test UE through a feeder.Connect the test UE to the notebook PC through a data line.

    Fasten the donor antenna horizontally and vertically.

    PCS SYSTEM:

    Run the test software to check the signal strength and the Communication error rate (BERbetter than 0.4%).

    Adjust the azimuth and down tilt of the donor antenna so that the selected carrier signalreaches the maximum (the signal strength better than -50dBm, communication can notswitch and drop in the 3 minutes, the time of BER better than 0.4% more than 90%)

    At the same time donor antenna must have clear signals, request the signal strength ofdistrict should be stronger, and more than 6dBm.

    WCDMA SYSTEM:

    Run the test software to check the signal strength and the Ec/Io of each PN

    Adjust the azimuth and downtilt of the donor antenna so that the Ec/Io of the PN of theselected carrier signal reaches the maximum and is greater than 7, and Ec/Io of otherPNs is less than 15.

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    9.2.3 Testing Downlink Received Power at Donor Port of Repeater

    After donor antenna is installed, please connect with the cable and pull the cable to where

    the repeater is installed, and then connect with engineering mobile phone to test again thedonor signals.

    PCS SYSTEM:

    PCS BCCH signal strength better than -50dBm, communication can not switch and dropin the 3 minutes, the time of BER better than 0.4% more than 90%

    Donor antenna must have clear signals, request the signal strength of district should bestronger, and more than 6dBm

    GSM BCCH signal level shall be less than 40dBm.Please add external attenuator if theinput signal level is strong (External attenuator wont increase the noise figure much)

    WCDMA SYSTEM:

    Connect the donor antenna to the spectrum analyzer through a feeder.

    Set the intermediate frequency (IF) and the channel bandwidth to 5 MHz on the spectrumanalyzer. Test the power of signals that the donor antenna receives. Usually, the level ofsignals received by the donor antenna should be less than 40 dBm. If the signal level isgreater than40 dBm, adjust the attenuator so that the signal level is less than 40 dBm.Since the WCDMA network has breathing effect, the output power level shall have 7~10dBspare for traffic, therefore the level of received signals shall be less than 58dBm( 10dBspare in areas with more traffic) or 55dBm(7dB with standard traffic), more than that willlead to breathing effect of coverage area.

    The signals (WCDMA pilot signals) tested by the spectrum analyzer are spectrum signalswith a bandwidth of 3.84 MHz. There are no other signals around this bandwidth.

    9.2.4 Testing Effective Downl ink Path Loss

    PCS SYSTEM:

    The downlink path loss between BTS and the donor antenna is as follows:

    LD-link = PBTS-PBTS PORT BCCH (PBTS PORT BCCH refers to the BCCH power level to theRepeater input port, the value can be obtained by engineering mobile phone)

    The macro BTS in the urban area usually has the output power level of 4~6W as per eachcarrier, while the microcell has 1~2W as per each carrier

    For example, donor BCCH power level is 4W:

    LD-link =36- PBTS PORT BCCH

    Budgeting Maximum Uplink Low Noise Power Output at Donor Port of Repeater

    In usual cases, the effective uplink path loss is roughly equal to the effective downlink pathloss. Because GSM system requests that the uplink noise power from the repeater to BTS

    is less than 121dBm

    Therefore the repeater UL gain shall be GupLD-linkNF , (NF is the repeater UplinkNoise figure)

    Suppose Gnoise= LD-linkNF.

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    WCDMA SYSTEM:

    The downlink path loss between node B and the donor antenna is as follows:

    LD-link = Pnode B-Pdonor (Pdonor is the downlink signal power received at the donor end)

    Suppose: The maximum transmitting power of node B is 20 W and the overhead poweraccounts for 20%. When there is no traffic, the transmitting power of node B is as follows:

    Pnode B=20W*20%=4W=36 dBm

    The effective downlink path loss is as follows:

    LD-link=36-Pdonor

    9.2.5 Downlink gain setting

    There are three factors to be followed to set DL gain of indoor repeater:

    Meet with isolation requirement of G1= LISO-10dB

    The repeaters gain shall be less than Isolation I -10dB, and if it allows, the gain shall beless than Isolation I -15dB

    Meet with UL noise Gnoise

    The UL noise from the repeater shall be less than the thermal noise floor when reachingBTS tower.

    The DL gain G2 shall be set so that the repeater can reach its full downlink output power

    Finally to set the gain GDL= MING1Gnoise +8dBG2

    UL Gain GUL= MING1GnoiseG2

    Gnoise +8dB explanation: The downlink gain can be maximum 8dB higher than uplinkgain in indoor repeater solutions

    Downlink gain setting procedures:

    PCS system

    Use engineering mobile phone to test the input signal strength at the repeaters BTS port,in order to get the exact values of PBTS PORT BCCH (GSM)

    The gain to meet the targeted output power

    Set G2=PDL MAX-PBTS PORT BCCH

    WCDMA system

    Set G2=PDL MAX-PBTS PORT PILOT-7dB

    -6dB explanation: pilot signal of WCDMA system only takes up 10% of the BTS totaloutput power, and shall be set at 60% capacity, then the gain shall be set according to theinput power level of Pilot CH in order to avoid breathing effect, therefore there will be 6dBleft from the total output power to leave the capacity to traffic channels

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    The Downlink maximum gain GDLMIN (G2Gnoise +8dBLISO-10dB) , usually the value

    shall be the equal value, but if the coverage size is not big, please reduce the gain to somedegree.

    The attenuation should be less than 30 dB when you set the downlink gain of the repeaterand it would be the best to attenuate less than 15dB range, and in case more than 15dBattenuation is needed, please use external attenuator.

    9.2.6 Uplink gain setting

    UL maximum gain GUL MINGDL, Gnoise, LISO-10dB

    With the condition of meeting above formula, GUL value is usually between GDL andGDL-4dB

    9.2.7

    Adjusting System IsolationWhen the repeater gain is set improperly, or the isolation between the donor antenna andthe transmitting antenna is insufficient, self-oscillation often happens. A self-oscillatedsignal is a high amplitude signal of an in band frequency. Result of self oscillation: Slightself oscillation leads to non-linearity of repeaters output power, that would accordinglyworsen the signal quality and cause noises, if it is more serious, there will be call drops,and the most serious one would lead to the collapse of BTS tower.

    Below methods are available to check if the repeater has self oscillation or not: Comparethe spectrums in below two test result

    Illustration 1 the repeaters output power is connected with a load

    Illustration 2 the repeaters output power is connected with a server antenna

    When there is no self oscillation, the two spectrums shall be quite similar

    When there is self oscillation, some quite strong signals would be detected in Illustration 2,and many spurious signals would come out. Please try to reduce the gain of the repeater,you will see these spurious disappears immediately.

    Sever ant 1MSPort

    Donor ant

    Repeater

    Spectrum analyzer

    BTSPort

    Donor ant

    Repeater

    Spectrum analyzer

    BTSPort

    30dB coupler

    MSPort

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    PCS 2G+3G RF Repeater (37dBm) Users Manual

    This figure and the actual repeater and antenna will be different, but the meaning is the

    same expression

    An effective way of eliminating self-oscillation is to reduce the gain, adjust the azimuth anddown tilt of the antenna, and increase the system isolation.

    the inequality LISO-Grep >10B is not satisfied after the repeater gain is determined, take thefollowing measures to increase the system isolation:

    Tune the azimuth of the donor antenna

    Tune the down tilt of the donor antenna

    Tune the azimuth of the transmitting antenna

    Tune the down tilt of the transmitting antenna

    Add isolation net at the back of the antenna

    9.2.8 Detecting Repeater

    When you cannot find the reason why the receiving or transmitting channel is abnormal,you can use a source-scanning spectrum analyzer to detect the repeater. (For thespecifications, see the instructions for the repeater.) Note that the amplitude of theintroduced signal must agree with the actual condition.

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    Note:

    When testing the downlink power of the repeater, use couplers or attenuators to avoidburning out the tester.

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    PCS 2G+3G RF Repeater (37dBm) Users Manual

    10 Maintenance

    Check the following items when the repeater does not work normally:

    10.1 Integrated Module

    Check the integrated module as follows:

    Feel the integrated module to ensure that it is not hot.

    Check that the bands of the duplexer are matched.

    Check that the cable connectors are intact and tightened.

    Check that the input voltage is correct.

    Power Supply (Power Indicator Off)

    Check the power supply as follows:

    Check the indicator line is connected correctly and that the indicator is intact.

    Check that there is an output voltage.

    Check that the power socket is connected to the power supply.

    10.2 Repeaters working frequency setting

    10.2.1 Driver installation

    Please take out the CD from the repeater package and install the cable driver onto yourPC.

    Installation USB-RS232 drive from the disk

    Install the OMT software from the disk

    10.2.2 Cable connection

    Then please take out the data cable from the repeater package to connect the repeaterwith PC. The repeaters side is USB port, while PC side is USB port

    10.2.3 Software operation

    Please release the software from compressed RAR, open the file, and then an interfacewill appear as below

    Please follow the detailed OMT software user manual to operate the software.