Andrew INCELL1900 InCell 1900 Repeater User Manual InCell new manual

Andrew Corporation InCell 1900 Repeater InCell new manual

Manual

IInnCCeellll ™™ FFiibbeerr OOppttiicc DDiissttrriibbuutteeddAAnntteennnnaa SSyysstteemmInstallation and Users GuideCopyright Andrew CorporationVersion 1.1October 2000
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- ii -Proprietary InformationThis document is the property of Andrew Corporation. The information contained herein isproprietary to Andrew, and no part of this document may be reproduced or transmitted inany form or by any means, electronic or mechanical, for any purpose, without the expresswritten permission of Andrew.DisclaimerAndrew reserves the right to make changes, without notice, to the specifications andmaterials contained herein. While we have worked diligently to insure every elementpresented is correct, we shall not be responsible for errors. For the latest productinformation and technical specifications, please see the contact information below. Copyright Andrew Corporation, October 2000, Printed in USA, All rights reserved.FCC NoticeThis equipment complies with Part 24 of the FCC rules. Any changes or modifications notexpressly approved by the manufacturer could void the user’s authority to operate theequipment.WarningIn order to comply with FCC rules for rf exposure, the following must be observed:1. The antenna for this device must have a gain of no more than 21 dBi.2. The antenna must be installed such that a minimum separation distance of 20 cm. ismaintained between the antenna and any persons.TrademarksInCell™ is a trademark of Andrew Corporation. All other trademarks belong to theirrespective owner.Contact InformationFor more information about Andrew’s capabilities to extend RF signals coverage intostructures, including office buildings, shopping complexes, warehouses, tunnels, and mines,please contact us using the information below:Andrew Corporation2601 Telecom ParkwayRichardson, Texas 75082Attention: Mr. Matt MelesterE-mail:matt.melester@andrew.comFax: (972) 952-0018Voice: (972) 952-9745
Table of ContentsAndrew Corporation.................................................................................................................1Andrew In-Building Wireless Experience................................................................................1InCell™ Fiber Optic Distributed Antenna System Description..............................................1Central Distribution Unit (CDU) ...........................................................................................1CDU FRONT PANEL.........................1Remote Antenna Unit (RAU) ................................................................................................2CDU to RAU Interface Cables ..............................................................................................4Composite Fiber Optic & Power Cables ................................................................................4Standard Duplex Fiber Optic Cables......................................................................................4Indoor Antennas....................................................................................................................5In-Building Implementations Using the Andrew InCell™ System.........................................7Scalable System Architecture................................................................................................7The Signal Distribution Unit............................................................................................8The Interconnecting Cable...................................................................................................11The Installation Parameters ...........................................................................................13Sample Implementation.......................................................................................................16InCell™ Specifications............................................................................................................17Technical Performance........................................................................................................17Interface Specifications .......................................................................................................18Electrical Specifications......................................................................................................19Environmental and Mechanical Specifications.....................................................................20MTBF ...........................................................................................................................20MTTR...........................................................................................................................20
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- ii -InCell™ Network Monitoring System ...................................................................................21Pilot Tone Generation .........................................................................................................21RAU Indicators...................................................................................................................21CDU Front Panel Indicators ................................................................................................21Alarm Functions..................................................................................................................22Remote Monitoring Functions.............................................................................................22InCell™ Operation, Maintenance and Support ....................................................................24Operation ............................................................................................................................24Regular Maintenance...........................................................................................................24Fault Repair ........................................................................................................................24Support ...............................................................................................................................24Spare Policy........................................................................................................................24
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- iii -List of TablesTable 1. InCell™ Performance Specification............................................................................17Table 2. BTS Interface Specifications ......................................................................................18Table 3. Antenna Interface Specifications ................................................................................19Table 4. Electrical Specifications .............................................................................................19Table 5. InCell™ Environmental and Mechanical Specification...............................................20List of FiguresFigure 1. InCell™......................................................................................................................1Figure 2. InCell™ Form Factors ................................................................................................1Figure 3. Andrew Dual Band Patch Antenna..............................................................................5Figure 4. Andrew Dual Band Omni Antenna...............................................................................5Figure 5. Simplified InCell™ Block Diagram ............................................................................7Figure 6. InCell™ Central Distribution Unit ..............................................................................1Figure 8. Remote Antenna Unit..................................................................................................8Figure 9. System expandability to 48 RAUs...............................................................................9Figure 10. System Expandability to more than 48 RAUs..........................................................10Figure 11. Cross Section of Andrew Composite Fiber/Copper Cable........................................11Figure 12. Remote and Local Power Connections on the RAU.................................................12Figure 13. Typical System Configuration Using Off-Air Interface............................................16Figure 15. Remote Alarm Capability........................................................................................23Figure 16. Daisy Chaining CDU’s for Remote Monitoring.......................................................23
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 1 -Andrew CorporationAndrew Corporation is a global designer, manufacturer, and supplier of communicationsequipment, services, and systems. Andrew products and expertise are found incommunications systems throughout the world, including wireless and distributedcommunications, land mobile radio, cellular and personal communications, broadcast, radar,and navigation. The Andrew "Flash" trademark seen on the cover can also be seen in everycorner of the world on broadcast towers and microwave antennas, HELIAX® andRADIAX® cables, communications and computer networking equipment. The mark ofAndrew for more than 60 years, it is the benchmark of quality wherever it appears. It is asymbol of commitment to customer satisfaction from the 4,500-plus employees of AndrewCorporation. We are listed on the NASDAQ stock exchange under symbol “ANDW.” Tolearn more about us, please visit our web site at www.andrew.com.Andrew In-Building Wireless ExperienceThe Andrew Corporation Distributed Communications Systems (DCS) group has over 15years experience designing, installing, and managing large complex RF distribution systemsfor metropolitan railways, building owners, and public mobile radio and telephone operatorsthroughout the world. For clients who do not need turnkey solutions, we offer product salesor product sales with engineering support services.Andrew offers a range of products to meet requirements of the in-building market. In theearly 1980’s Andrew developed leaky cables as an adjunct to our coaxial cable business.This product quickly led us to pursuing and executing wireless RF coverage in confinedspaces such as metros, road tunnels, and buildings. Through these projects, our DistributedCommunications Systems division acquired critical experience in project management andRF engineering of these systems.
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 1 -InCell™ Fiber Optic Distributed Antenna System DescriptionThe subsystem consists of one or more Central Distribution Units (CDU) feeding multipleRemote Antenna Units (RAU).Figure 1. InCell™This unit can drive up to 6 RAU’s. Additional CDU’s can be driven using one or more ofour Signal Distribution Units (SDU). The required signal distribution is built into the back-plane of the chassis minimizing the need for interconnecting cables. Our design isintrinsically optimized for new technologies operating at higher bandwidths.Unlike other competing products, this product is designed for multi-operator, multi-servicecapabilities with higher output levels and lower system sensitivities. This equates to greatercoverage range per antenna unit and hence lower implementation costs. When complete,this product will be available in both single-band units, i.e., US Cellular, GSM 900, USPCS-1900, and DCS-1800, and dual band units in which both low and high band servicesare supported within the same unit using the same fiber pair.Figure 2. InCell™ Form Factors
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 2 -RAU FrontViewCDU Side ViewRAU FrontViewRAU FrontViewRAU FrontViewRAU FrontViewRAU FrontView
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 1 -Central Distribution Unit (CDU)The Central Distribution Unit (CDU) is the core module that can drive up to six RemoteAntenna Units (RAU. The CDU separates the down and uplink RF signals and convertsthese to optics for transmission over a 2-core single-mode fiber cable to one of six RAU’s.The CDU (shown at Figure 3) is housed in a standard 1U, 19-inch rack mount unit andprovides 6 sets of duplex optical fiber links to the remote antenna units.Figure 3. InCell™ Central Distribution UnitThe figure below provides a detailed view of the CDU front panel, showing the six remoteantenna interface ports. Each of the six ports is identical and provides DC power for theremote antenna as well as a downlink interface and an uplink interface with the remoteantenna unit.CDU FRONT PANEL
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 2 -The rear view of the CDU shows the RF input/output connector as well as the powerconnection and the on/off switch. The RF connections are Type N.CDU REAR PANELCDU Side ViewRemote Antenna Unit (RAU)The RAU converts the signal back to RF and provides a single duplex downlink and uplinkoutput port; and the dual band unit combines the two services to a single RF connector. Thethird order intercept point is high (33dBm typical), and the output can go directly to a multi-band antenna or be split to drive multiple antennas.
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 3 - RAU Front View RAU Rear ViewCDU Status IndicatorsRAU Status IndicatorsAlarm OutputRemote Monitoring Option
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 4 -CDU to RAU Interface CablesComposite Fiber Optic & Power CablesStandard Duplex Fiber Optic Cables
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 5 -Indoor AntennasAndrew is developing several new low profile in-building antennas like the examples inFigure 4 and Figure 5. These dual band antennas are based on a product originally designedby our automotive accessory division. We anticipate releasing other antenna products in thenext calendar year.Figure 4. Andrew Dual BandPatch AntennaFigure 5. Andrew Dual Band Omni Antenna
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 6 -Outdoor Donor AntennasLightning ArrestorsBi-Directional AmplifiersCoaxial Cables and JumpersDistributed Antenna System PlanningInCell Distributed Antenna System Bill of Material
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 7 -In-Building Implementations Using the Andrew InCell™ SystemScalable System ArchitectureThe InCell™ distributed antenna system is a scalable system that can be configured to support upto 384 antenna locations using three building block modules.OEFiber Optic ReceiverFiber Optic TransmitterDUPLEXERPowerFiber Optic ReceiverFiber Optic TransmitterDUPLEXERPowerRemote Antenna Unit #1Remote Antenna Unit #6EOOEOEComposite Fiber/CopperCable18 AWG Copper WireFiber Optic ReceiverFiber Optic TransmitterOEOEFiber Optic ReceiverFiber Optic TransmitterOEOESingle Mode Fiber -- DownlinkSingle Mode Fiber -- UplinkSingle Mode Fiber -- DownlinkSingle Mode Fiber -- UplinkLocal Power Supply(Wall Transformer)RF, Test Signal & PowerDistribution6-Channel Central Distribution UnitFigure 6. Simplified InCell™ Block Diagram
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 8 -The RAU is (shown at Figure 7) weighs only 0.6 pounds and is 38 mm (length) x 127 mm(width) x 165 mm (height). This compact size makes it suitable for close mounting to theantenna.Figure 7. Remote Antenna UnitThe Signal Distribution UnitThe third building block module is the Signal Distribution Unit (SDU). This is a 1U rack mountunit housing a standard 8-way power divider that is placed in front of the CDU to drive eightCDU’s from one service input. Using an architecture of one SDU and eight CDU’s, 48 antennalocations can be served (see Figure 8). Using an architecture of nine SDU’s dividing the servicesignal to 64 CDU’s, 384 antenna locations can be served (see Figure 9). These approaches arebest housed coherently in 19-inch equipment racks as depicted in Figures 25 and 26.
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 9 -REMOTE ALARM RF 100-240 VACRF POWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERRF RF RF RF RF RF RF RFRFREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMD00-45RF INFigure 8. System expandability to 48 RAUs
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 10 -REMOTE ALARM RF 100-240 VACRF POWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERRF RF RF RF RF RF RF RFRFREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMD00-46RFREMOTE ALARMREMOTE ALARMRF RFREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMRF RFRFRFRFRF RFPOWERRF100-240 VACRFRFRFRFRFRFRFRFPOWERPOWER100-240 VAC100-240 VACPOWERPOWER100-240 VAC100-240 VACRFRFRFRFRF RFPOWERPOWER100-240 VAC100-240 VACPOWER 100-240 VACRF RFRF RFRFRF RFRFRFRF INFigure 9. System Expandability to more than 48 RAUs
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 11 -The Interconnecting CableAny single mode 2-core fiber cable can be used to drive the RAU a distance of 20Km from theCDU. In this configuration, power to the RAU is supplied from an external 12-28VDC source oran Andrew supplied universal (110/240VAC, 50/60Hz) wall transformer (wall wart). AnAndrew manufactured composite cable is also available. This cable (shown at Figure 10)combines 2-core fiber and 2-conductor copper elements in a single jacket. Using this cable,power to the RAU is supplied by the CDU over the copper conductors eliminating the need for aseparate RAU power supply. Although the composite cable greatly simplifies the installationprocess, the CDU-RAU separation is limited to 1.5Km. The limitation is the DC voltage dropfrom the CDU to the RAU over the copper conductors.MicrocableNaturalInsulatedCopper(Red)Rip CordOuterJacketInsulatedCopper(Black)Microcable(Blue)0.210"TMTMD00-37Figure 10. Cross Section of Andrew Composite Fiber/Copper CableThe Andrew composite cable is rugged, flexible and has an outside diameter of 0.21”, making iteasy to install. One optical fiber provides the downlink signal between the CDU and the RAU;the second optical fiber provides the uplink signal between the RAU and the CDU. These cablesuse industry standard SC type connectors to interface with the RAU and CDU. The two copperlines are used to provide DC power and ground signals to the RAU so that no additional powerplanning is required. System installers are not required to install AC power, conduit andtransformers at each remote antenna location. With the CDU in the center of a system, remoteantennas could be spaced as far as 3 km apart using the composite cable.Andrew provides plenum rated and riser rated composite cables for in-building installation asfully tested cable assemblies and as bulk cable. The cables meet demanding building codes forsafety. Tested cable assemblies are available in lengths of 50, 100, 150 and 200 meters, withoptical and power connectors installed. Bulk composite cable is also available on spools and
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 12 -requires system installers to add crimp-on connectors for the copper lines and add SC typeconnectors to the fiber cables. Refer to Andrew Catalog 38, pages 642-645, for fullspecifications of the plenum and riser rated cables. Andrew cable assemblies also come with apulling hook and harness to make the cables easier to install.If the in-building location for each of the remote antenna units is pre-planned and the distancesare all known, then composite cables with connectorized ends and installation-ready wraps canbe ordered to specific lengths. The other option is to buy reels of composite cable and thenconnectorize them in field. The connectors for the copper wires are fairly easy to crimp on, butthe SC-connectors take a few minutes and require the use of a non-fusion based splicing deviceand well trained technicians to insure that reliable, low loss splices are made.Single mode fiber optic cable is used in the InCell™ products because of its wide bandwidth andloss attenuation characteristics. Single mode fiber optic cable has the lowest attenuation of allfiber optic cable types and is typically lower in cost than multimode fiber cable. Single modefiber is used in communications systems where high data rates and wide bandwidths arerequired. Wideband fiber optic line provides for unlimited future growth. Typical single modecable loss is 0.4 dB per km. The loss of two SC connectors is typically 0.5 dB.The SC type connector is the most popular connector type for the fiber-optic cables. The SCconnector is the recommended connector in the EIA/TIA-568A building wiring standard. Itprovides a very reliable, low loss connection at a reasonable cost. The SC type connector is easyto install and provides positive feedback when correctly seated. SC connectors have good lock,pull and wiggle characteristics, ensuring that they will stay in place when installed and that theyare immune to tension or lateral pressure on the fiber cable.Figure 11 shows the RAU fiber and power connections.POWERU/L D/L PWRD00-44Rem LocFigure 11. Remote and Local Power Connections on the RAU
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 13 -The Installation ParametersInstallation times will depend on the size of each installation; however, Andrew can providerough guidelines for installing the CDU and RAU that may be used to determine the total systeminstallation time once the number of equipment parts is determined.The CDU may be mounted in a standard 19” equipment rack or on a wall. Allow 30 minutes forunpacking the CDU, installing the unit into the rack or wall and connecting the RF, fiber andpower cables. Upon application of system power, front panel indicators will give the installer avisual indication of power and link status. Mounting hardware is provided for rack or wallmounting.RAUs are typically mounted on walls or ceilings throughout the building. The units are smalland lightweight and installers may carry multiple RAUs at one time to speed installation.Mounting the RAU to a wall or ceiling and connecting the fiber and power cables and theantenna takes only minutes. Upon application of system power, indicators on the RAU give theinstaller a visual indication of RAU power and link status. Mounting hardware is provided forthe RAU.To minimize system wiring times, Andrew composite cable is recommended to allow the fiberoptic links and the power to be routed to each RAU in one small, easy to pull cable. Thecomposite cables eliminate the need for conduit to each remote antenna location, improvingwiring installation time.Disruption to business is minimal as the CDU is typically installed in a electronic equipmentroom and the remote antennas and wiring may be installed after work hours. The cables aresmall and lightweight making them easy to pull through risers, above roofs and through tubes.Site survey testing before and after installation may be done during business hours using small,portable RF measurement tools.
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 14 -CDU REAR PANELCDU FRONT PANELCDU Side ViewCDU Side View
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 15 -RAU Front ViewRAU Front ViewRAU Rear View
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 16 -Sample ImplementationFigure 12 illustrates a small off-air implementation using an Andrew GridPACK donor antenna,an Andrew Cellular Extender (ACE), and a single InCell™ Central Distribution Unit driving upto six Remote Antenna Units. The donor antenna and extender can be replaced with other RFinputs, such as another off-air interface, a base station, or distribution unit depending on theapplication.AndrewIInCellRemote Antenna UnitAndrewCompositeOptical Fiber Cable(up to 1.5 Km)AndrewInCellCentral Distribution UnitAndrewOff-AirRepeater FamilyAndrewSurge ArresterAndrewGRIDPACKHigh Gain Donor AntennaAndrewHeliax CableIndoorPatch AntennaAndrewIInCellRemote Antenna UnitAndrewCompositeOptical Fiber Cable(up to 1.5 Km)AndrewInCellCentral Distribution UnitAndrewOff-AirRepeater FamilyAndrewSurge ArresterAndrewGRIDPACKHigh Gain Donor AntennaAndrewIInCellRemote Antenna UnitAndrewCompositeOptical Fiber Cable(up to 1.5 Km)AndrewInCellCentral Distribution UnitAndrewOff-AirRepeater FamilyAndrewSurge ArresterAndrewGRIDPACKHigh Gain Donor AntennaAndrewHeliax CableIndoorPatch AntennaAndrewHeliax CableIndoorPatch AntennaFigure 12. Typical System Configuration Using Off-Air Interface
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 17 -InCell™ SpecificationsTechnical PerformanceThe technical specifications are summarized in Table 1.Table 1. InCell™ Performance SpecificationWireless Service Standard InCell Part Number Downlink Passband(MHz)Uplink Passband(MHz)US Cellular(AMPS/TDMA/CDMA)GSM-900DCS-1800PCS-19002.4 GHz ISM WLANUS Cellular/PCS-1900GSM-900/GSM-18002000-1000-0002000-2000-0002000-3000-0002000-4000-0002000-5000-0002000-6000-0002000-7000-000869-894935-9601805-18801930-19902400-2500869-894/1930-1990935-960/1805-1880824-849890-9151710-17851850-19102400-2500824-849/1850-1910890-915/1710-1785InCell™ Downlink PerformanceInCell™ Uplink PerformanceUplink Frequency Range 2000-1000-000 (US Cellular) 2000-2000-000 (GSM-900) 2000-3000-000 (DCS-1800) 2000-4000-000 (PCS) 2000-5000-000 (WLAN) 2000-6000-000 (Dual Band) 2000-7000-000 (Dual Band)824-849 MHz890-915 MHz1710-1785 MHz1850-1910 MHz2400-2500 MHz824-849/1850-1910 MHz890-915/1710-1785 MHzEnd-to-End RF Gain (dB) 15 dBGain Flatness Over Frequency +/- 2.5 dBMaximum Input Power Limiter threshold at -40 dBmNoise Figure* 11 dBDownlink Freqnency Range 2000-1000-000 (US Cellular) 2000-2000-000 (GSM 900) 2000-3000-000 (DCS-1800) 2000-4000-00 (PCS) 2000-5000-000 (WLAN) 2000-6000-000 (Dual Band) 2000-7000-000 (Dual Band)869-894 MHz935-960 MHz1805-1880 MHz1930-1990 MHz2400-2500 MHz869-894/1930-1990 MHz935-960/1805-1880 MHzEnd-to-End RF Gain (dB) 15 dBGain Flatness Over Frequency +/-2.5 dBMaximum Input Power 20 dBmReturn Loss >17 dBSpurious/Intermodulation -13 dBm for non-European Systems-36 dBm from 9 kHz to 1 GHz-30 dBm from 1 GHz to 12.75 GHz1 dB Compression Point 20 dBmOutput Intercept Point 20 dBmWideband Noise -121.5 dBm/HzCDMA Spectral Regrowth -45 dBcOutputPowerAnalog15 dBm, 2 carriers12 dBm, 4 carriers9 dBm, 8 carriersTDMA15 dBm, 2 carriers12 dBm, 4 carriers9 dBm, 8 carriersCDMA10 dBm, 1 carrier4 dBm, 2 carriersGSM-90010 dBm, 2 carriers7 dBm, 4 carriers4 dBm, 8 carriersDCS-180012 dBm, 2 carriers9 dBm, 4 carriers6 dBm, 8 carriers
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 18 -Interface SpecificationsThe BTS interface specifications are shown in Table 2 and the antenna interface specificationsare in Table 3.Table 2. BTS Interface SpecificationsRequirement Performance SpecificationOperational Bandwidth GSM-900DCS-1800Dual Band 900/1800Uplink890-915 MHz1710-1785 MHz890-915 MHz1710-1785 MHzDownlink935-960 MHz1805-1880 MHz935-960 MHz1805-1880 MHzConnector Types- CDU RF Optical Fiber AC Power (CDU only) DC PowerType NType SC Single Mode FiberStandard 3-pin “D” typeMolex 2-pinConnector Locations RF and AC connectors on rear of CDUFiber and DC power on front of CDUInterface Type RF Optical Fiber Duplex (bi-directional port)Single mode fiber: 1 uplink, 1 downlinkRF Impedance/VSWR 50 ohms, typical 10 dB return loss1 dB Compression Point Downlink 20 dBmThird Order Output Intercept Point Downlink UplinkN/ASpurious Response -36 dBm from 9 kHz to 1 GHz-30 dBm from 1 GHz to 12.75 GHzGain/Gain Linearity Downlink Uplink 15 db ± 2.515 db ± 2.5Group Delay <1.0 usec (CDU, fiber and RAU)
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 19 -Table 3. Antenna Interface SpecificationsRequirement Performance SpecificationOperational Bandwidth GSM-900DCS-1800Dual Band 900/1800Uplink890-915 MHz1710-1785 MHz890-915 MHz1710-1785 MHzDownlink935-960 MHz1805-1880 MHz935-960 MHz1805-1880 MHzConnector Types- RAU RF Optical Fiber AC Power (CDU only) DC PowerSMAType SC Single Mode FiberN/AMolex 2-pinConnector Locations RF connector on rear of RAUFiber and DC power on front of RAUInterface Type RF Optical Fiber Duplex (bi-directional port)Single mode fiber: 1 uplink, 1 downlinkRF Impedance/VSWR 50 ohms, typical 10 dB return loss1 dB Compression Point Downlink Uplink 20 dBmN/AThird Order Output Intercept Point Downlink Uplink 36 dBm-6 dBmSpurious Response -36 dBm from 9 kHz to 1 GHz-30 dBm from 1 GHz to 12.75 GHzGain/Gain Linearity Downlink Uplink 15 db ± 2.515 db ± 2.5Group Delay <1.0 usec (CDU, fiber and RAU)Electrical SpecificationsThe power requirements for the first and second generation Central Distribution Units (CDU) aresummarized in Table 4. The RAU is generally remotely powered from the CDU.Table 4. Electrical SpecificationsSlim Line Smart Rack 3ULine Voltage 100 – 240 VAC, 47 – 63 Hz 100 – 240 VAC, 47 – 63 HzPower Consumption 40 Watts (CDU w/6 RAU’s) 140 Watts (CDU w/20 RAU’s)Power Supply Redundancy None Hot StandbyBackup Power Supply External External
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 20 -Environmental and Mechanical SpecificationsThe environmental and mechanical specifications are summarized in Table 5. We have notcompleted shock and vibration testing at this time.Table 5. InCell™ Environmental and Mechanical SpecificationParameters CDU RAUEnclosure Dimensions 1.75”H x 16.75”W x 12”D1U, 19” rack-mountable 1.5”H x 5”W x 6.5”DEnclosure Weight 4 pounds 0.6 poundsRF Connector N-female, bi-directional SMA-female, bi-directionalFiber Connector 6 pairs (12), SC Type 1 pair (2), SC TypeRemote Alarm from CDU 9-pin D-Sub with summary power andsystem link status N/ALocal Alarm One power and one link status LED perantenna port One power and one link status LEDAC Power 100-240 VAC, 47-63 Hz N/ADC Power 24 VDC output to each RAU +28 to +12 VDC inputMaximum DC Power Draw CDU: 10 WattsSystem: 40 Watts with 6 RAUs 5 WattsMTBF > 27,000 hours > 180,000 hoursStorage Temperature -10 to +70o COperating Temperature 0 to +50o CHumidity 0 to 95 % RH, non-condensingMTBFA system MTBF using one CDU and six RAU’s is calculated to be 26,954 hours for the slim lineunit and 9,851 hours for a fully populated 3U 20 unit chassis. Each RAU has a MTBF of181,265 hours. These MTBF values were calculated using the Bellcore part count method.MTTRLow MTTR values are achieved due to the extensive internally monitoring capability. TheMTTR of the Slim Line unit is estimated at 15 minutes using a board replacement maintenanceconcept. The MTTR for the 3U chassis is less than 5 minutes as modules can be easily replacedwhile the unit is operating. The RAU MTTR is 5 to 30 minutes depending upon the complexityand ease of access to the installed device. The proposed maintenance concept for the RAU is adirect replacement of the unit.
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 21 -InCell™ Network Monitoring SystemThe InCell™ family is designed to minimize maintenance and monitoring costs. Provisions aremade for both local and remote monitoring of small and large systems. The InCell™ systemcontinuously monitors and reports status of the system hardware, by a combination of indicatorsavailable at the central hub and at each remote antenna and alarms for remote monitoring that aidin system fault detection and fault isolation down to a circuit board or cable.The wideband, single mode fiber cable allows a low frequency RF test signal to be continuouslypassed over the downlink and uplink signal paths with multiple RF wireless signals. In a dualband system, the 67 MHz pilot test signal, the 800 MHz service, and the 1900 MHz servicesignals simultaneously pass through the downlink and uplink paths.Pilot Tone GenerationThe CDU generates a continuous pilot tone for system level fault detection and isolation anddistributes the signal to each RAU port. This low frequency RF tone is combined with thedownlink RF signal and transmitted over the fiber optic cable to the RAU where it is receivedand filtered from the downlink RF signal. In the RAU, the pilot tone is filtered, amplified andcombined with the RF uplink signal to be sent over the optical uplink path back to the CDU.Within the RAU, the pilot tone is detected by a threshold detector to indicate the presence of thepilot tone at a minimum signal level. The pilot threshold detector drives an LED on the RAUthat indicates that the downlink optical signal path to the RAU is connected.The return path pilot tone from the RAU is also filtered, amplified and detected. The detectedpilot signal is passed to a threshold detector to indicate the tone presence at a minimum signallevel. The pilot threshold detector in turn drives an LED at each port of the CDU indicating thatboth the downlink to the RAU and the uplink back to the CDU are connected and that power isproperly functioning at the RAU.RAU IndicatorsThe Power indicator on the RAU shows that DC power from the composite cable is present atthe RAU. If the indicator is green, DC power is present in the RAU.The LINK indicator on the RAU shows that the pilot tone from the CDU is present over thedownlink. When the LINK indicator is off on the RAU, the downlink optical path between theCDU and the RAU is installed correctly and DC power is present in the RAU. If the LINKindicator is red, there may be a problem with the downlink optical path between the CDU andRAU or a problem with the RAU power. The RAU indicators allow system installers andmaintainers to easily determine the RAU functional status, the power supply status, and thedownlink optical path status.CDU Front Panel IndicatorsThe Power indicator for each port of the CDU indicates that the DC power is present at that port.If the CDU Power indicator is green, power is good at that CDU port, also indicating that theinternal AC power supply is good. If the Power indicator for one CDU port is off, there is
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 22 -problem with that CDU port interface. If the Power indicators for all CDU ports are off, the ACpower supply may be bad, AC power may be switched off or there may be another problem withthe AC power. The LINK indicator at each CDU port shows that the CDU generated pilot tone was sent overthe downlink from the CDU to the RAU then received and transmitted over the uplink path fromthe RAU back to the CDU. When the CDU LINK indicator is off, the downlink and uplinkoptical paths are installed correctly and DC power is present in the RAU. If the LINK indicatoris red, there may be a problem with the fiber optic signals between the CDU and RAU; aproblem with the RAU power; or a problem with the RAU itself. The CDU indicators allowsystem installers and maintainers to easily determine each RAU functional status, powerdistribution to each RAU, and the correct connection of the fiber optic cables.Alarm FunctionsThe CDU has two alarm outputs on the rear panel to indicate the overall health of the powersupply and the uplink and downlink to each remote antenna units. The link alarm output is asummary alarm of all of system uplinks and downlinks and remote antenna power. The alarmoutputs are through a DB-9 connector located on the CDU chassis rear panel.Remote Monitoring FunctionsAs an option that will be available in February 2001, InCell™ Systems will support remotesystem health monitoring using standard protocols that will allow customers to monitor fullsystem status. This feature uses an embedded processor (see Error! Reference source notfound.) to monitor and report system health for the CDU and all RAUs, including powersupplies, uplink and downlink paths and cables.With this option, the InCell™ System hardware can be remotely monitored in three ways:v Locally using a RS-232 connection to a terminal or PC (see Figure 13)v Remotely using an SNMP Agent chassis connected to a telephone, LAN/WAN or othercommunications mediumv Remotely using dry-contact terminals connected to a third party SCADAIn the first method, the RS-232C interface option does not require a separate chassis. An RS-485bus daisy chains the system status and alarms together as illustrated in Figure 13 and Figure 14.Communications between CDU’s is accomplished over an RS-485 link, and the user can connectto the master bus using a standard computer or RS-232C terminal.In the second method, a separate 1U chassis is required to act as the SNMP agent. The SNMPagent allows a network management system to monitor InCell™ device(s) by telephone ornetwork connection using industry standard interfaces. The SNMP agent performs networkmanagement operations such as setting configuration parameters, alarm notification and currentoperation statistics. A database of the InCell™ network management information, called themanagement information base (MIB), is maintained by the Agent.
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 23 -In the third method, dry contact alarm terminals can be connected to a third party SCADAsystem over copper wires.Laptop computerInCellInCellInCellRS-232(Local)InCell AgentSNMP ManagementSystemRS-485(network)Laptop computerInCellInCellInCellRS-232(Local)InCell AgentSNMP ManagementSystemRS-485(network)Figure 13. Remote Alarm CapabilityFigure 14. Daisy Chaining CDU’s for Remote MonitoringREMOTE ALARM RF 100-240 VACRF POWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERREMOTE ALARM RF RF 100-240 VACPOWERRF RF RF RF RF RF RF RFRFREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMREMOTE ALARMD00-48NETWORKRF ININTERFACERS485SERIAL
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 24 -InCell™ Operation, Maintenance and SupportOperationInCell™ system operation is continuous. Andrew recommends using an uninterruptible powersupply (UPS) to provide power to the CDU. If the system uses composite cable to providepower to the remote antenna units located throughout the building, the UPS can keep the CDUand all RAUs powered and operational during brownouts and power outages.Unlike some hybrid fiber distributed antenna systems that use frequency translation in thewireless distribution process, the InCell™ uses no frequency synthesizers or synchronizingcircuitry that may be affected by power failures. The InCell™ operates immediately after poweris applied and is not susceptible to power failures.Regular MaintenanceMinimal maintenance is required to support installed InCell™ systems. System maintainersshould ensure that all RF, power and fiber connectors are tight and that the CDU is mounted withadequate room to allow air to flow into the chassis. Indicator LEDs show system status whilerelay and optional remote alarm interfaces allow small or large system status to be monitored.Andrew does recommend using a commercially available fiber optic cleaning kit to maintainclean fiber optic connections. Typically, after system installation, no removal or cleaning of thefiber connectors will be required.Fault RepairIf a fault is detected in the system, maintainers can determine the problem cause problem byreviewing reports from remote monitoring systems or by observing the front panel LEDindicators on the CDU chassis. Because the different CDU ports correspond to different remoteantenna locations, maintainers can determine where the problem exists in the building.Maintainers can replace RAUs in the building without having to power down the system. If aCDU fails, spare CDU boards can be installed.SupportAndrew engineers and technicians familiar with the operation of the InCell™ system areavailable Monday through Friday, 8am to 5pm CST. These personnel are familiar withdistributed in-building antenna systems, with fiber optic cable installation and withtroubleshooting and in-building coverage solutions.In special cases, Andrew has provided local support of indoor wireless distributed antennasystems. Please contact Andrew DCS if this type of maintenance support is required.Spare PolicyFor the Slim Line CDU assembly, we recommend sparing at the board level. This unit iscomprised of 2 unique board types and a power supply module. There is a single printed circuitboard that provides the necessary RF power, DC and alarm distribution and 6 identical printed
Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide- 25 -circuit boards that perform the gain and optical conversion (see Error! Reference source notfound.). If the remote monitoring option is selected, there is a third 2-teir printed circuit board.

Navigation menu