Andrew 24GCA Spread spectrum transmitter with amplifier User Manual 237726 8 page

Andrew Corporation Spread spectrum transmitter with amplifier 237726 8 page

Manual

User and Installation ManualUltraSpan™ Integrated AAntenna/Gain-ccontrolled, Bi-ddirectional AAmplifier2.4-2.5 GHz ISM Band, 420 mW VersionBulletin 237726
2System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Typical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Table of ContentsSystem DescriptionAntennaApplicationsThe UltraSpan™ antenna/amplifier system extends the operating range of broad-band wireless systems operating in the 2400-2500 MHz spread spectrum band.The basic unit consists of a MICROCEPTOR®antenna and a built-in bi-directionalamplifier operating in Time-Division Duplex (TDD) mode. It features intelligentalgorithm and Automatic Gain Controlled (AGC) circuits which maintain transmitpower and prevent transmit signal saturation, thus minimizing signal distortion.The system also includes a universal power supply, a DC power inserter, andmounting hardware.The UltraSpan system has applications in a wide range of wireless systemswhere TDD technology is used, such as Wireless Local Area Network (WLAN),Wireless Local Loop (WLL), Wireless Internet Access (WIA), and wireless modemconnection with point-to-point systems.MICROCEPTOR Antennas are small, aesthetically pleasing antennas for broad-band applications. They feature a patented feed design for excellent directivity ina low profile package. This key feature automatically detects the power level and adjusts the amplifiergain to allow for system variables. For example, the AGC adjusts for differentinterconnecting cable lengths and radio modems with different output powers.The AGC Transmit Amplifier is fully operational in a wide transmit input powerrange of 1 to 200 mW. An input signal of 2.5 mW delivers the maximum U.S.FCC specified power level. The AGC attenuates input signals greater than 4 dBmand maintains a maximum output power of 26.2 dBm.The amplifier is built into the back of the MICROCEPTOR antenna and isencased in a weatherproof enclosure. It features a low noise amplifier and an RFfilter that decreases potential RF interference and overload caused by out-of-band frequencies, such as those received from higher power wireless communi-cation systems.Automatic Gain Control(AGC)Low Noise AmplifierThis equipment complies with Part 15 of the U.S. FCC Rules andRegulations. Any changes or modifications, not expressly approved bythe manufacturer, could void the user's authority to operate the equip-ment.Important Notice:
3110/220 VAC to 7.5 VDC converter.DC Power Inserter injects the 7.5 VDC onto the coaxial feeder cable to powerthe low noise amplifier. Standard Mounting Hardware consists of a mast clamp and L bolt. OptionalElevation Adjustable Mount is available.The table compares the UltraSpan™ amplifier with other TDD antenna-mountamplifiers.Amplifier ComparisonULTRASPAN™ Other TDD AmplifiersTransmit gain Intelligent self adjusted FixedTransmit power level Maintained Varies, depending on input power levelTransmit signal distortion Minimized at all times Much worse at high input power levelsInput power range Wide range accepted Designed for narrow requirements range onlyAmplifier Mounting Built into the Antenna Usually tower mountedConfiguration requiring separate installationOperationThe universal power supply provides the DC power; the radio modem suppliesthe RF signal. Both connect to the dc power inserter. The radio signal and theDC voltage are supplied to the antenna/amplifier via coaxial cable (not includ-ed). The antenna installs on a mast.The system operates automatically and no user adjustments are required.Features• Automatic gain control minimizes signal distortion.• Wide range of transmit input levels (1.4 mW to 200 mW).• Low noise amplifier provides system noise figure of 3.5 dB.• Universal, auto switching, 110/220 VAC to 7.5 VDC power adapter.• Green LED indicates DC power on.• DC ground for lightning protection.• Power inserter equipped with surge protection.• Industry standard "N" connectors ("F" connectors optional).• Weatherproof, outdoor enclosure. Mounting HardwareUniversal PowerSupply
4UltraSpan Antenna/AmplifierModel QD-24-0010 (50 Ohm)Model QD-24-0040 (75 Ohm)Optional 60 degreeElevation Adjustable MountModel L-BRACKET and 13/18-MTG-HDWPower SupplyModel WT-GCARadio ModemAdapter Cable(not supplied)DC Power InserterModel PI-GCA24-0010 (50 Ohm)Model PI-GCA24-0040 (75 Ohm)model dependentCoaxial Cable (not supplied)50 Ohm or 75 Ohm, model dependentOptional DBS MountModel DS-1000 (white)Model DGS-1000 (gray)Figure 1 - Typical SystemSystem Components • UltraSpan™ Antenna/Amplifier • Power Inserter• Power Supply• Connecting Cables (not supplied)Radio Modem Adapter CableAntenna/LNA Feeder CableThe Power Inserter combines the RF signal from the Radio Modem (not shown)with the 7.5 VDC power from the Power Supply. The combined DC power and RF signal are fed to the Antenna/Amplifier usingcoaxial cable (not included).The Antenna/Amplifier mounts to a mast using the included mounting bracket.Typical SystemAgere Systems PC LAN card (FCC ID.: IMRWLPCE24H
Installation InstructionsThe installation, maintenance, or removal of antenna systems requires qualified, experi-enced personnel. Andrew installation instructions have been written for such personnel.Antenna systems should be inspected once a year by qualified personnel to verify properinstallation, maintenance, and condition of equipment.FCC exposure limits require minimum separation of 2 m between the user and theradiating elements.Andrew disclaims any liability or responsibility for the results of improper or unsafe instal-lation practices.Notice:Mount Antenna 1Select Antenna Polarization. Use antenna polarity indicator on backcover (see Figure 2). Rotate antenna 90° to change polarity.Antenna Polarity Indicator(shown Horizontal polarity)Rotate Antenna 90 degreesCounterclockwise for Vertical PolarityAntenna RF ConnectorType 'N' Female model QD-24-0010 (50 Ohm Shown)Type 'F' Female model QD-24-0040 (75 Ohm)StandardMounting BracketFigure 2 - Back Cover Details2 Assemble Mast Clamp (Figure 3) to Mast Bracket. Slide mast clamplegs into slot on mast bracket (Figure 4), then slide up to top of the slot(Figure 5). Figure 3 - MastClampFigure 4 (AntennaRemoved for Clarity)Figure 5 (AntennaRemoved for Clarity)53Mount to Mast (Figure 6).Slide unit with mast clampover suitable mast (up to 2 inch-es) and secure with included LBolt.Figure 6 - UnitMounted to Mast
DC Power InserterConnections,Indicators, and LabelsThe Power Inserter injects DC power into the RF cable. The power is carried tothe amplifier with the RF signal via the Antenna Coax. CAUTION: Improperly connected cables may cause damage to the power inserter,radio modem, or another device in line between the power inserter and theradio modem.6Antenna Connections 4Connect Antenna Coaxto Power Inserter(Figure 7). Use coaxial cableequipped with two N male con-nectors (for 50-ohm models) ortwo F male connectors (for 75-ohm models). Cable and con-nectors are not supplied.Figure 7 - AntennaRF ConnectionInstallation Instructions (Cont'd.)5"To Radio" Connection (Figure 8). N female. Install Radio ModemAdapter Cable (not supplied) to connect the DC power inserter with theradio modem.6"To Amplifier" Connection (Figure 8). N female (50 ohm cable) or Ffemale (75 ohm cable). Install Antenna/Amplifier Coaxial Cable (not sup-plied). The cable options are a 50-ohm cable with Type N male connectors or a75-ohm cable with Type F male connectors, depending on the model chosen.Figure 8 - DC Power Inserter Coax ConnectionsConnect Antenna Coax(not supplied) to PowerInserter connector marked'To Amplifier'Power SupplyRadio ModemAdapter Cable(not supplied)Connect Radio Modem Adapter(not supplied) to DC PowerInserter connector marked'To Radio'DC Power Inserter
77DC Power Supply (Figure 9). Install the Power Supply and connect itscord to the Power Inserter. The power supply provided with the unit is auniversal type, 110/220 VAC to 7.5 VDC converter. The Green LED on thePower Inserter indicates that dc power is on.8Antenna Signal Alignment. Direct the front of the antenna towards thedesired signal and verify signal level. Elevation adjustment of the anten-na may be necessary depending on proximity to system headend. 9Waterproof the Antenna Connector. Once the unit is installed and test-ed, waterproof the antenna connector. Green LED illuminates whenpower is appliedPower SupplyConnect Power Supplyto Power InserterFigure 9 - DC Power Inserter Power ConnectionOperating InstructionsThe unit operates automatically and no user adjustments are required. The amplifier is designed for 2.4 GHz radios using Time Division Duplex (TDD)mode of operation. It is equipped with a high speed Tx/Rx switch that detectstransmit signal and switches to transmit mode within 600 nano-seconds. In theabsence of any transmit signal, the unit stays in receive mode. The amplifiercannot be used with a radio device that uses separate bands for transmit andreceive in a true full duplex mode.The system is currently approved for use with the following radio LAN cards:1) Agere systems PC LAN FCC ID.: IMRWLPCE24H
SpecificationsGeneralFrequency Band 2400 - 2500 MHzOperating Mode Bi-directional TDDMaximum Transmit Output Power +26.2 dBm (420 mW)Transmit Input Power 0 dBm min, 23 dBm maxTransmit Gain Automatically adjusts up to 23 dBAntenna Gain 16 dBi ± 1 dBReceive Gain 14 dBFrequency Flatness ±1.0 dBNoise Figure 3.5 dBLightning Protection Ground connection at antenna portDC Surge Protection At 7.5 VDC inputOperating Temperature -40°C to + 70°CPower Supply 7.5 VDC at 0.7 ampRF Connector Type N, Female or Type F, FemaleDimensions 10.75" x 11" Weight with Standard Mounting Kit 2.2 lbTransmit Power Gain at 2.45 GHz and 25°CInput Level, at amplifier Typical Output Level1 mW (0 dBm) 250 mW1.3 mW (1 dBm) 280 mW1.6 mW (2 dBm) 330 mW2 mW (3 dBm) 380 mW2.5 mW (4 dBm) 420 mW50 mW (17 dBm) 420 mW100 mW (20 dBm) 420 mW200 mW (23 dBm) 420 mWAbove 2.5 mW input, the amplifier attenuates the input signal power and main-tains the output power typically at 420 mW.Do not exceed 200 mW (+23 dBm) of input power to the amplifier.CAUTION:Andrew Corporation10500 West 153rd StreetOrland Park, IL U.S.A. 60462Telephone: 708/349-3300FAX (U.S.A.): 1-800-349-5444Internet: http:/www.andrew.comCustomer Service, 24 hours: U.S.A. • Canada • Mexico: 1-800/255-1479U.K.: 0800 250055 Other Europe: +44 1592 782612 Printed in U.S.A. 12/01Copyright © 2001 by Andrew CorporationFunctional Block Diagram

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