ADC Telecommunications DISSMRAA Digivance Indoor Coverage Solution System User Manual 75136 CV

ADC Telecommunications Inc Digivance Indoor Coverage Solution System 75136 CV

Contents

manual 2

ADCP-75-136 • Issue 1 • November 2002 Page 7 ©2002, ADC Telecommunications, Inc.(2) AC POWER CORDCONNECTOR(3) AC POWER ON/OFF SWITCH(1) GROUNDSTUD(4) OPTICAL PORT LED INDICATOR(6 PLACES)(5) OPT/ELEC PORTENABLE/DISABLESWITCH (6 PLACES)(6) ELECTRICAL PORTDC POWER JACK(6 PLACES)(7) OPTICAL PORTOPTICAL TRANSCEIVERTX-LEFT - RX-RIGHT(6 PLACES)(8) UNIT LEDINDICATOR(11) RF INPUTCONNECTOR(9) OVERDRIVELEDINDICATOR(10) ALARMCONNECTORRECEPTACLE(12) RF OUTPUTCONNECTOR17264-ANOTE: SHOWN WITHOUTCABLE MANAGEMENT TRAYFigure 3. Digital Host Unit User Interface 2.2 Digital Remote Unit Description The DRU, shown in Figure 4, serves as the cellular-user servicing unit for the Digivance ICS.The DRU provides the following basic functions:• RF interface to the cellular users via an external antenna• Optical interface to the DHU or DEU• Conversion of the forward path digitized optical signal to adigitized RF signal• Conversion of the digitized forward path RF signal to the original cellular RF signal• Digitizing of the cellular reverse path RF signal• Conversion of the digitized reverse path RF signal to adigital optical signal output• Transports alarm status over the reverse path optical fiberFRONT PANELMOUNTING FOOT(EACH CORNER)7.0 INCHES(178 mm)7.3 INCHES(185 mm)2.1 INCHES(53 mm)17268-AFigure 4. Digital Remote Unit FCC ID: F8I-DISSMRAA, Partial User Manual, 2 of 4
ADCP-75-136 • Issue 1 • November 2002 Page 8 ©2002, ADC Telecommunications, Inc.2.2.1 Primary Components The DRU consists of an electronic circuit board assembly that is mounted within apowder-coated sheet metal enclosure. The metal enclosure provides amounting point for the electronicassembly, serves as aheat sink, and controls RF emissions. Except for the optical transceiver,the DRU components are not field replaceable. The DRU is designed for use within a non-condensing indoor environment such as inside abuilding. All controls, connectors, andindicators (except the SMA antenna connector) are mounted on the DRU front panel forconvenient access.2.2.2 Mounting The DRU is equipped with four integral mounting feet that allow it to be mounted on any flathorizontal or vertical surface. Atypical location for mounting the DRU would be on a ceilingor a wall. The DRU may also be installed in spaces used for environmental air such as thespace over a suspended ceiling or beneath a raised floor. Slots are provided in the mountingfeet for securing the DRU to the mounting surface.2.2.3 Fault Detection The DRU detects internal circuitry faults or loss of system inputs. A front panel LED indicatorturns from green to red when afault condition is detected or when the optical input is lost. TheDRU sends the fault information to the DHU or DEU over the reverse path optical fiber. Acorresponding port LED at the DHU or DEU turns from green to red when the DRU reports afault.2.2.4 Antenna Connection The RF signal interface between the DRU and the cellular users is provided through anexternal antenna. An SMA connector is provided for connecting the DRU to the antenna. Theantenna must be ordered separately. Several types of antennas with various RF propagationsare available. Non-ADC antennas may also be used with the DRU to meet various applicationrequirements.2.2.5 Optical Port The DRU is equipped with asmall form factor LC-type optical transceiver for connecting theoptical fibers. Each transceiver is color-coded to identify whether it supports single-mode(blue) or multi-mode (black/beige) fiber. Depending on the application requirements, theoptical port may be connected to either aDHU or a DEU. The modular optical transceiver isavailable separately as an accessory item and is field replaceable.2.2.6 Powering The DRU is equipped with afemale RJ-45 jack that provides aconnection point for the DCpower cable. The DRU is powered by 34–48 Vdc power which is supplied through the RJ-45
ADCP-75-136 • Issue 1 • November 2002 Page 9 ©2002, ADC Telecommunications, Inc.connector. Power to the DRU may be supplied by the DHU, DEU, or by a 120 Vac to 48 Vdcpower converter (available separately as an accessory item) plugged into a properly grounded120 Vac outlet. The ac/dc converter is aUL Listed stand-alone Limited Power Supply (LPS)unit with arated output of 48 Vdc at 1.2 Amps. When powered by the DHU or DEU, acategory 3 or 5 twisted-pair cable terminated with RJ-45 connectors is required.2.2.7 Cooling The DRU is cooled by natural convection air flow. The DRU mounting feet are designed to provideclearance under the unit so that air can enter the DRU enclosure from the bottom and exit throughthe top. Aminimum clearance of 3inches (76 mm) must be provided on all sides of the DRU(except the bottom) to ensure there is adequate air circulation for cooling. In addition, at least onesurface of the DRU installation area must be open to the interior of the building.2.2.8 User Interface The DRU user interface consists of the connectors and the LED that are provided on the DRUfront and rear panels. The DRU user interface points are described in Table 2 and indicated inFigure 5.Table 2. Digital Remote Unit User Interface REFNo. USER INTERFACE DESIGNATION DEVICE FUNCTIONAL DESCRIPTION 1STATUS Multi-colored LED(Red/Green/Yellow) Indicates if the status of the DRU isnormal or faulty or if the forward pathoptical input is normal or lost. (see Note)2 48 VDC RJ-45 jack (female) Used for connecting a DC power cable.3FIBERTX RX LC-type opticaltransceiver Used for connecting the forward path andreverse path optical fibers.4 – SMA-type coaxialconnector (female) Used for connecting the antenna coaxialcable lead.Note: Amore detailed description of LED operation is provided in Section 5.17269-AREAR VIEWFRONT VIEW(4) ANTENNA CONNECTOR(1) STATUS LED(2) 48 VDC POWERCONNECTOR(3) FIBER LINKOPTICAL ADAPTERSTX-LEFT - RX-RIGHTFigure 5. Digital Remote Unit User Interface
ADCP-75-136 • Issue 1 • November 2002 Page 10 ©2002, ADC Telecommunications, Inc.2.3 Digital Expansion Unit Description The DEU, shown in Figure 6, serves as aservice expansion unit and line extender for theDigivance ICS. The DEU provides the following basic functions:• Optical interface to the DHU and up to six DRU’s or DEU’s• Conversion of the forward path digitized optical signal to an electrical bit stream• Splitting of the electrical bit stream into six separate bit streams• Conversion of the six forward path electrical bit streams into six digital optical signals• Conversion of up to six reverse path digital optical signals into six serial bit streams• Combining of the six reverse path serial bit streams into asingle digital composite signal• Conversion of the single digital composite signal to adigital optical signal• DC power for powering the DRU’s• Alarm transport via the optical fibersFRONT PANELCABLE MANAGEMENTTRAYMOUNTINGBRACKET(BOTH SIDES)17270-A3.5 INCHES(89 mm)11.4 INCHES(290 mm)15.3 INCHES(389 mm)17.2 INCHES(437 mm)Figure 6. Digital Expansion Unit 2.3.1 Primary Components The DEU consists of two electronic circuit board assemblies and apower supply that aremounted within apowder-coated sheet metal enclosure. The metal enclosure provides amounting point for the electronic assemblies and serves as aheat sink. Except for the fan unitsand optical transceivers, the DEU components are not field replaceable. The DEU is designedfor use within anon-condensing indoor environment such as inside awiring closet or cabinet.All controls, connectors, and indicators are mounted on the DEU front panel for convenientaccess. Cable management functions for the power and fiber optic cables are provided by acable management tray that extends outward from the DEU front panel.2.3.2 Mounting The DEU may be used in both rack-mount and wall-mount applications. For rack mountapplications, apair of reversible mounting brackets is provided that allow the DEU to be
ADCP-75-136 • Issue 1 • November 2002 Page 11 ©2002, ADC Telecommunications, Inc.mounted in either a19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted,the front panel of the DEU is flush with the front of the rack and the cable management trayextends 3.9 inches (99 mm) beyond the front panel. For wall-mount applications, apair ofholes is provided in the cable management tray which allow the DEU to be mounted on anyflat vertical surface. The DEU should be oriented with the front panel facing upward whenwall-mounted. Fasteners are provided for rack-mount applications.2.3.3 Fault Detection The DEU detects internal circuitry faults or loss of system inputs. Various front panel LightEmitting Diode (LED) indicators turn from green to red or yellow when afault is detected orwhen an optical input is lost. The DEU transports the fault information to the DHU orsupporting DEU over the reverse path optical fiber. Acorresponding port LED at the DHU orDEU turns from green to red when the DEU reports afault.2.3.4 Optical and Electrical Connections The optical and electrical connections with the DRU’s and DEU’s are supported by six optical andsix electrical ports. Each optical and electrical port includes astatus LED, asmall form factor LCtype optical transceiver, an RJ-45 DC power jack, and aport enable/disable switch. Each transceiveris color-coded to identify whether it supports single-mode (blue) or multi-mode (black/beige) fiber.An optical port may be connected to aDRU, aDEU, or not used. An electrical port may beconnected to aDRU or not used. Unused ports are disabled via the corresponding portenable/disable switch. When disabled, the port LED is off, the alarm reporting function is disabled,the laser is off, and the DC power is off. Enabling the enable/disable switch activates all functions.The DEU also provides one optical port (designated as the host port )for the optical interface withthe DHU or asupporting DEU. The modular optical transceivers are available separately asaccessory items and are field replaceable.2.3.5 Powering The DEU is powered by 120–240 Vac (50–60 Hz) power which is supplied though astandardthree-conductor AC power cord. The power cord is provided with the DEU and is 98 inches(2.5 meters) long. Aresetable circuit breaker/On-Off switch is provided at the unit front panel.The switch applies power to the DEU internal power supply.2.3.6 Cooling Continuous air flow for cooling is provided by dual fans mounted on the right side of the sheetmetal housing. Aminimum of 3 inches (76 mm) of clearance space must be provided on boththe left and right sides of the DEU for air intake and exhaust. An alarm is provided thatindicates if ahigh temperature condition (>50º C/122º F) occurs. The fans may be field-replaced if either unit fails.2.3.7 User Interface The DEU user interface consists of the various connectors, switches, and LEDs that areprovided on the DEU front panel. The DEU user interface points are described in Table 3 andindicated in Figure 7.
ADCP-75-136 • Issue 1 • November 2002 Page 12 ©2002, ADC Telecommunications, Inc.Table 3. Digital Expansion Unit User Interface REFNo. USER INTERFACE DESIGNATION DEVICE FUNCTIONAL DESCRIPTION 1Grounding stud Used for connecting a grounding cable tothe DEU chassis.2POWER 3-wire AC powercord connector Used for connecting the AC power cord.3I/O I/O rocker switch/circuit breaker Provides AC power On/Off control andAC power over current protection.4OK/NOK (Ports 1–6) Multi-colored LED(Red/Green/Yellow) Indicates if the DRU or remote DEUconnected to the optical port is normal orfaulty or if the reverse path optical inputfrom the DRU or remote DEU is normalor lost. (see Note)5ON/OFF (Ports 1–6) I/O rocker switch Enables or disables correspondingelectrical and optical ports.6DC PWR (Ports 1–6) RJ-45 jack (female) Used for connecting aDRU cat 3or 5powercable to the designated DC power jack.7FIBER (Ports 1–6) LC-type opticaltransceiver Used for connecting each DRU or remoteDEU forward path and reverse path opticalfiber to the designated optical port.8HOST PORT LC-type opticaltransceiver Used for connecting the DHU or supportingDEU forward path and reverse path opticalfiber.9UNIT Multi-colored LED(Red/Green/Yellow) Indicates if the DEU is normal or faulty.(see Note)10 HOST PORT Multi-colored LED(Red/Green/Yellow) Indicates if the forward path optical inputfrom the DHU or supporting DEU isnormal or lost. (see Note)Note: A more detailed description of LED operation is provided in Section 5.17266-A(3) AC POWER ON/OFF SWITCH(1) GROUNDINGSTUD(4) OPTICAL PORT LED INDICATOR(6 PLACES)(5) OPT/ELEC PORTENABLE/DISABLESWITCH (6 PLACES)(9) UNIT LEDINDICATOR(2) AC POWER CORDCONNECTOR(6) ELECTRICAL PORTDC POWER JACK(6 PLACES)(7) OPTICAL PORTOPTICAL TRANSCEIVERTX-LEFT - RX-RIGHT(6 PLACES)(10) HOST PORTLEDINDICATOR(8) HOST PORTOPTICAL TRANSCEIVERTX-LEFT - RX-RIGHTNOTE: SHOWN WITHOUTCABLE MANAGEMENT TRAYFigure 7. Digital Expansion Unit User Interface
ADCP-75-136 • Issue 1 • November 2002 Page 13 ©2002, ADC Telecommunications, Inc.2.4 Terms and Definitions Refer to Table 4 for alisting of the terms used in this manual and their definition.Table 4. Terms and Definitions TERM DEFINITION Alarm Response The response to an alarm input.Base Transceiver Station The radio equipment that transmits and receives the voice and controlchannels to and from the cellular handsets.Composite Signal A signal that is the sum of several signals.Digital Expansion Unit The unit that extends a single optical interface to multiple opticalinterfaces or that extends an optical run.Digital Host Unit The unit that converts and provides the digital source signal to all DEU’sand DRU’s and converts summed inputs from DEU’s and DRU’s.Digital Remote Unit The unit that interfaces the in-building user to the Digivance opticaltransport.Digitized RF Signal The RF signal in a digitized form.Forward Path Signal A signal that travels from the base station to the cell phone.Major Alarm An alarm condition that applies when any fault (except hightemperature) occurs.Minor Alarm The alarm condition that applies when a high temperature conditionoccurs. (> 50º C/122º F)Mute To force aforward path RF signal to a“no signal” state.Normal State The operating state after power-up is completed and no faults aredetected.Port An RF, optical, or electrical interface point.Port Alarm Afault that affects only the unit or units connected to that port.Indicates no optical input to port.Power-Up State The period between the application of power to a unit and the normalstate. This period includes time for circuit stabilization andinitialization operations.Reverse Path Signal A signal that travels from one or more cell phones to the base station.Transport Alarm Signal An alarm signal transported over the reverse path optical fiber.Unit Alarm Afault within a unit that usually affects all connected ports.2.5 Specifications Refer to Table 5 for the Digivance ICS system specifications. All specifications apply after afive minute warm-up period.
ADCP-75-136 • Issue 1 • November 2002 Page 14 ©2002, ADC Telecommunications, Inc.Table 5. System Specifications PARAMETER SPECIFICATION REMARKS Optical – All UnitsFiber type Multi-mode: 50 or 62.5 micron coreSingle-mode: 9micron core Two fibers per transport linkMaximum fiber lengthfor guaranteedperformance500 m (1,641 ft)750 m (2461 ft)10 km (32,808 ft)With 62.5 micron core MM fiberWith 50 micron core MM fiberWith 9micron core SM fiberOptical output power –10 to –3 dBmOptical wavelength 850 nm for multi-mode use1310 nm for single-mode useEnvironmental Operating temperature 0º to 50º C (32º to 122º F)Storage temperature –30º to +70º C (–22 to 158º F)Humidity No condensationWeather resistance NEMA type 2, IEC 529 IP30 Indoor installation onlyRF Forward Path System bandwidth 18 MHzFrequency range 851 to 869 MHzOutput power > +13 dBm Maximum composite powerGain +33 dB nominal At room temperatureGain variation < 6 dB< 1.5 dB variation per 1.25 MHzCDMA channelOver frequency, temperature, andunit to unit. May have up to 2 dBvariation at upper band edge.OIP3 +35 dBm typical At max. composite output powerCDMA ACPR1 < –45 dBcSpurious Output < –30 dBmDHU RF input signallevel –20 dBm maximum composite Provides maximum output powerlevel at the DRURF Reverse PathSystem bandwidth 18 MHzFrequency range 806 to 824 MHzGain +10 dB nominalGain Variation < 6 dB< 1.5 dB variation per 1.25 MHzCDMA channelOver frequency, temperature, andunit to unit.Automatic Gain Limiting Enabled for composite RF input>–40 dBm Prevents A/D saturation with largeinputs.Noise Figure < 9 dB + 10 log Nwhere N = # ofremotes < 9 dB typical. See Note at end oftable.DHU RF output signallevel –30 dBm maximum With a–40 dBm compositemaximum input signal at the DRU(continued)
ADCP-75-136 • Issue 1 • November 2002 Page 15 ©2002, ADC Telecommunications, Inc.Table 5. System Specifications, continued PARAMETER SPECIFICATION REMARKS Physical/Electrical – DHUWeight 18.5 lbs (8.4 kg)RF connection Type N FemaleAlarm connection Screw terminals (14–26 AWG) NO, NC, and COM (form Crelaycontacts)Optical connection Duplex LC transceiverDC power outputconnection RJ-45 FemalePower input 120/240 Vac, 50–60 HzAC power connection IEC 320 MalePower consumption 250 W MaximumCurrent rating 85–250 Vac, 2Amp inputPhysical/Electrical – DEUWeight 18.5 lbs (8.4 kg)Optical connection Duplex LC transceiverDC pwr output connection RJ-45 FemalePower input 120/240 Vac, 50–60 HzAC power connection IEC 320 MalePower consumption 250 W MaximumCurrent rating 85–250 Vac, 2Amp inputPhysical/Electrical – DRUWeight 1.5 lbs (708 g)RF connection SMA FemaleAntenna types Ceiling mount omni directional90º directional panelCeiling mount hallway2.5 dBi gain7.5 dBi gain4dBi gainOptical connection Duplex LC transceiverDC pwr input connection RJ-45 FemalePower input 34 to 48 VdcDC power cable length(Cat-3 or -5 cable) 500 meters (1,641 ft) maximum Any distance beyond 500 metersrequires alternate power sourcingPower consumption 17 W TypicalCurrent rating 48 Vdc, 400 mA inputNote:The noise from all remotes is added at the host. Given Nunits with identical gain and noise, the formulaapplies exactly. Slight unit to unit noise figure and gain variations make this avery useful approximation.
ADCP-75-136 • Issue 1 • November 2002 Page 16 ©2002, ADC Telecommunications, Inc.3 INSTALLATION PLANNING AND SYSTEM DESIGN This section provides installation planning information and basic system design recommendationsfor RF engineers that will be designing and installing an in-building coverage solution using theDigivance ICS. System design and planning services are available from ADC if required. Refer toSection 7of this manual for additional information.3.1 Base Station Interface Requirements The DHU may be interfaced either locally or remotely with the BTS. As referenced in thispublication, the BTS could be either amicrocell or a cell site base station. With alocalinterface, ahard-wire connection is provided between the DHU and the BTS (microcell) usingcoaxial cables. With aremote interface, an over-the-air connection is provided between theDHU and the BTS (cell site base station) using a donor antenna.3.1.1 Local BTS (Microcell) Interface Alocal interface between the DHU and the BTS (microcell) over coax requires specific RFinput and output signal levels at the DHU and BTS. The correct levels must be provided at theBTS and DHU interface using alocal interface device (ancillary product). Ablock diagram ofatypical local BTS interface is shown in Figure 8.LOCALINTERFACEDEVICE(ANCILLARYPRODUCTS)FORWARD(DOWNLINK)REVERSE (UPLINK)+13 dBm(COMPOSITE MAX)-40 dBm(COMPOSITEMAX)-20 dBm(COMPOSITE MAX)-30 dBm(COMPOSITE MAX)18110-ADIGITALHOSTUNITOPTICAL LINKOPTICAL LINKDIGITALREMOTEUNITDIRECTIONAL ANTENNATO/FROM HANDSETSLOCAL BASETRANSCEIVER STATION(MICRO CELL)T1 LINKTO SWITCHFigure 8. Local BTS Interface Block Diagram The level of the RF output signal from the BTS varies depending on the type of BTS.Therefore, it will generally be necessary to add some gain or some attenuation to the forwardpath (downlink) signal. The recommended composite maximum RF input signal level at theDHU is –20 dBm.When the level of the RF input signal at the DHU is –20 dBm, the level ofthe RF output signal at the DRU will be +13 dBm.In the reverse path, the input signal level required at the BTS also varies depending on thetype of BTS. When the level of the reverse path (uplink) signal at the DRU is at therecommended composite maximum of –40 dBm,the level of the RF output signal from theDHU will be –30 dBm.Therefore, it may also be necessary to add some gain or attenuation tothe reverse path signal in order to provide the input RF signal level required at the BTS.
ADCP-75-136 • Issue 1 • November 2002 Page 17 ©2002, ADC Telecommunications, Inc.3.1.2 Remote BTS (Cell Site Base Station) Interface Aremote interface between the DHU and the BTS (cell site base station) via a donor antennarequires specific RF input and output signal levels at the DHU and antenna. The correct levelsat the DHU and antenna can be provided using aremote interface device (ancillary product). Ablock diagram of a typical remote DHU to BTS interface is shown in Figure 9.DIRECTIONAL ANTENNA TO/FROM CELL SITE BTS18111-AREMOTEINTERFACEDEVICE(ANCILLARYPRODUCT)FORWARD(DOWNLINK)REVERSE (UPLINK) +13 dBm(COMPOSITEMAX)-40 dBm(COMPOSITEMAX)-20 dBm(COMPOSITEMAX)-30 dBm(COMPOSITEMAX)DIGITALHOSTUNITOPTICAL LINKOPTICAL LINKDIGITALREMOTEUNITDIRECTIONAL ANTENNATO/FROM HANDSETSFigure 9. Remote BTS Interface Block Diagram In the forward path (downlink), the recommended composite maximum RF input signal levelat the DHU is –20 dBm.When the level of the RF input signal at the DHU is –20 dBm, thelevel of the RF output signal at the DRU will be +13 dBm.In the reverse path, the RF output signal level required at the donor antenna will varydepending on the distance from the BTS. When the level of the reverse path (uplink) signal atthe DRU is at the recommended composite maximum level of –40 dBm,the level of the RFoutput signal from the DHU with be –30 dBm.Therefore, it will generally be necessary to addsome gain to the reverse path signal in order to provide the output RF signal level required atthe donor antenna.3.2 Location and Mounting Requirements 3.2.1 DHU and DEU Location and Mounting Requirements The DHU and the DEU may be either rack mounted or wall mounted. Fasteners (both metric andUS standard) are included with each unit for rack mount applications. Apair of reversible mountingbrackets is provided that allows the unit to be mounted in either a19-inch or 23-inch EIA or WECOequipment rack. When rack-mounted, the front panel of the unit is flush with the front of the rack.The cable management tray extends 3.9 inches (99 mm) beyond the front panel. Both the DHU andDEU occupy 3.5 inches (89 mm) of rack space. Make sure the mechanical loading of the rack willbe even to avoid ahazardous condition such as aseverely unbalanced rack. The rack should safelysupport the combined weight of all the equipment it holds and be properly anchored.
ADCP-75-136 • Issue 1 • November 2002 Page 18 ©2002, ADC Telecommunications, Inc.For wall-mount applications of the DHU or DEU, apair of holes is provided in the cablemanagement tray that allows the unit to be mounted on any flat vertical surface. The mountingholes are spaced 11-21/32 inches (296 mm) apart. The DHU/DEU should be oriented so thefront panel faces up when mounted. Appropriate fasteners for wall mounting must be providedby the installer. It is recommended that abacker board such as 3/4-inch plywood be installedover the mounting surface to provide asecure base for attaching the DHU or DEU.The DHU and DEU should be mounted in anon-condensing indoor environment such asinside awiring closet or within an environmentally controlled cabinet. All controls,connectors, and indicators are mounted on the front panel. All cables should be routed to thefront panel for connection. Cable retainers provided on the cable management tray for securingthe fiber optic, DC power, and external alarm system cables.The maximum recommended ambient temperature for the DHU and DEU is 50º C (122º F).Sufficient space for air circulation should be provided between each unit when installed in amulti-unit rack assembly because the operating ambient temperature of the rack environmentmight be greater than room ambient. Aminimum clearance of 3 inches (76 mm) should beprovided on both the left and right sides of the unit for air intake and exhaust. Refer to Figure2for the DHU dimensions and Figure 6 for the DEU dimensions.3.2.2 DRU Location and Mounting Requirements The DRU must be installed in anon-condensing indoor environment and may be wall-mounted or ceiling-mounted. The DRU may also be installed in spaces used for environmentalair such as the space over a suspended ceiling or beneath a raised floor. The DRU is equippedwith four integral mounting feet that allow it to be fastened to any flat vertical or horizontalsurface. Holes are provided in the mounting feet for inserting fasteners. Appropriate fastenersfor securing the DRU to the selected mounting surface must be provided by the installer.The DC power cable and optical fibers should be routed to the DRU front panel forconnection. The antenna coaxial cable should be routed to the DRU rear panel for connection.Aminimum of 3 inches (76 mm) of clearance space should be provided on all sides of theDRU (except the bottom) to ensure there is adequate air circulation for cooling. In addition, atleast one surface of the DRU installation area must be open to the interior of the building. If aportable/flexible antenna will be installed, aminimum of 9 inches (229 mm) clearance shouldbe allowed along the surface with the antenna. Refer to Figure 4 for the DRU dimensions.3.3 Powering Requirements 3.3.1 DHU and DEU Powering The DHU and DEU are powered by 120–240 Vac (50–60 Hz) which is supplied through astandard three-conductor AC power cord. The 120 Vac power cord is provided with the unitand is 98 inches (2.5 m) long. Both the DHU and the DEU have a current rating of 2.0 Ampsat 120 Vac input. Each unit should be located so that an AC outlet is within the reach of thepower cord.
ADCP-75-136 • Issue 1 • November 2002 Page 19 ©2002, ADC Telecommunications, Inc.If back-up powering is required, it is recommended that the building Uninterruptible Power Supply(UPS) system be used to provide back-up power to the DHU and DEU in the event of an AC poweroutage. This will also power all the DRU’s that are powered by the DHU or DEU.3.3.2 DRU Powering The DRU is powered by 48 Vdc power which is input to the DRU through the front panel RJ-45 connector. Power to the DRU may be provided by the DHU, DEU, or by a 120 Vac to 48Vdc power converter (available separately as an accessory item) plugged into a properlygrounded 120 Vac outlet. The DRU has a current rating of 400 mA at 48 Vdc input.If the DRU will be powered by the DHU or DEU, the power cable must be fabricated on-site by theinstaller. Category 3or 5twisted pair cable should be used for the power supply cable. Themaximum recommended length of the power cable is 500 meters.The power cable must be routedbetween the DHU or DEU and the DRU. Both ends of the power cable must be terminated with amale RJ-45 connector. If the DRU will be located more than 500 meters from the DHU or DRU, itmust be locally powered by a48 Vdc power converter.The DRU may be powered locally by the ac/dc converter, shown in Figure 10, which isavailable as an accessory item. The converter is aUL Listed stand alone Limited PowerSupply (LPS) unit with arated output of 48 Vdc at 1.2 Amps.The converter is equipped witha 6-foot (1.8 m) DC power cable which is terminated with an RJ-45 male connector. Theconverter is powered by 120–240 Vac (50–60 Hz) power which is supplied though astandardthree-conductor AC power cord. The 120 Vac power cord is 6feet (1.8 m) long and isprovided with the converter.15988-AFigure 10. AC/DC Power Converter 3.4 Optical Options and Requirements Each DHU and its associated DEU’s and DRU’s are connected over a pair of optical fibers.One fiber transports the forward path optical signal and the other fiber transports the reversepath optical signal. Either 62.5 or 50 micron core multi-mode optical fiber; or 9 micron coresingle-mode optical fiber may be used for the optical transport connection. With 62.5 microncore fiber, the optical path may be up to 500 meters in length. With 50 micron core fiber, theoptical path may be up to 750 meters in length. With 9micron core cable, the optical path maybe up to 10 kilometers in length. Single- and multi-mode fibers may be used in the samesystem. Adiagram of the optical connections is shown in Figure 11.
ADCP-75-136 • Issue 1 • November 2002 Page 20 ©2002, ADC Telecommunications, Inc.TX RXTX RXTX RX TX RX TX RX TX RXPORTS 1-6PORTS1-6PORTS 1-6FIBER PORTFIBER PORTHOSTPORTFORWARD PATHREVERSE PATHFORWARD PATHREVERSE PATHFORWARD PATHREVERSE PATHDIGITALREMOTEUNITDIGITALREMOTEUNITDIGITALHOSTUNITDIGITALHOSTUNITDIGITAL EXPANSION UNITBASIC CONFIGURATION WITH DHU AND DRUBASIC CONFIGURATION WITH DHU, DEU, AND DRUEND-TO-END OPTICAL CONNECTOR/CABLE ASSEMBLY DIAGRAM16814-A62.5 MICRON: MAXIMUM LENGTH = 500 METERS50 MICRON: MAXIMUM LENGTH = 750 METERS9 MICRON: MAXIMUM LENGTH = 10 KILOMETERSFigure 11. Digivance ICS Optical Connections Whenever possible, use conduit or aguideway such as the FiberGuide system to route the opticalfibers between the DHU, the DEU’s, and the DRU’s. Avoid routing optical fibers through laddertype cable racks or troughs that do not provide sufficient support to limit bending or preventaccidental damage. Tie-wrapping is not recommended as ameans of securing fiber optic cables.Provide sufficient slack at each unit for connecting each fiber to the required port. Fibers may bepre-terminated or terminated on-site using field-installable LC type connectors.3.5 Coaxial Cable Requirements The DHU interfaces either locally (see Figure 8) or remotely (see Figure 9) with the BTSthrough coaxial cable connections. In alocal interface with the BTS, coaxial cables are
ADCP-75-136 • Issue 1 • November 2002 Page 21 ©2002, ADC Telecommunications, Inc.required to link the DHU with the interface device and the interface device with the BTS. In aremote interface, coaxial cables are required to link the DHU with the interface device and theinterface device with the donor antenna. The DHU is equipped with N-type female connectorsfor connecting the forward and reverse path coaxial cables. High performance, flexible, lowloss 50-ohm coaxial communications cable (RG 400 or equivalent) should be used for allcoaxial connections.3.6 System Expansion Planning The DEU enables 6-way expansion of any optical port. This makes it possible to add moreDRU’s without having to install additional DHU’s. Each DHU is equipped with six opticalports. If more than six DRU’s are required by the application, aDEU may be connected to oneof the optical ports at the DHU which expands that port to six ports. If still more optical portsare required, then asecond DEU may be connected to the DHU or a second DEU may beconnected to the first DEU. The ability to cascade DEU’s in parallel or in series providesunlimited flexibility. It is physically possible to connect an unlimited number DRU’s to theDHU through the installation of DEU’s.The total number of DRU’s that can be served is limited by the cumulative noise effect causedby antenna combining. This number cannot be determined until the radius distance ofcoverage required at the DRU antenna is determined and the path loss attributed to thestructure are known. The system design requires that the carrier to noise differential be greaterthan the customer’s desired signal to noise ratio.If it is likely that the system will be expanded in the future, locate the DHU in such away that it canbe used as ahub for an expanded system. It should be noted that aDEU can be used as an opticalregenerator. ADRU may sometimes need to be located at apoint that is beyond the distancelimitation imposed by the optical fiber. The solution is to install aDEU at the maximum opticalfiber length from the DHU. This provides an additional 500 m, 750 m, or 10 km (depending on thefiber type) of optical fiber length beyond the DEU for connecting the DRU.3.7 DRU Antenna Options Various antennas, shown in Figure 12, are available from ADC for use with the DRU. Allantennas include a 6-foot (1.8 m) long 50-ohm coaxial cable (equipped with SMA maleconnector) for connection to the DRU. The DRU is equipped with an SMA female connectorfor connecting the antenna cable.The DRU antennas are designed for unobtrusive mounting within an office environment. Eachtype of antenna provides aspecific coverage pattern in order to accommodate the shape of thearea where coverage is required. The ceiling-mount omni directional antenna is designed tomount in the center of the coverage area. The directional panel antennas are designed to mountvertically on one side of the coverage area or in the corner of the coverage area. The ceilingmount hallway antenna is designed to mount in the center of long corridors. Antennas otherthan those offered by ADC may also be used if required.
ADCP-75-136 • Issue 1 • November 2002 Page 22 ©2002, ADC Telecommunications, Inc.Note:To comply with Maximum Permissible Exposure (MPE) requirements, the maximumcomposite output from the antenna cannot exceed 1.5 Watts ERP and the antenna must bepermanently installed in a fixed location that provides at least 20 centimeters (8 inches) ofseparation from all persons per FCC 47 CFR part 2.1091.DIAMETER - 6.14 INCH (156 MM)DEPTH - 1.05 INCH (27 MM)7.26 INCHES(184 MM)3.88 INCHES(99 MM)2.26 INCHES(57 MM)7.90 INCHES(201 MM)2.38 INCHES(60 MM)8.65 INCHES(220 MM)4 dBi GAIN CEILING-MOUNTHALLWAY2.5 dBi GAIN CEILING-MOUNTOMNIDIRECTIONAL7.5 dBi GAIN90 DEGREE DIRECTIONAL PANEL(WALL/CORNER-MOUNT)ALL ANTENNAS ARE EQUIPPED WITHA 72-INCH RG58/U CABLE TERMINATED WITH A MALE SMA CONNECTORMOUNTING STUDLENGTH - 1.5 INCHES (38 mm)DIAMETER - 0.875 INCHES (22 MM) MOUNTING STUDLENGTH - 1.5 INCHES (38 mm)DIAMETER - 0.875 INCHES (22 MM) 18073-AINCLUDES ADJUSTABLEMOUNTING BRACKET(NOT SHOWN)Figure 12. SMR+ DRU Antenna Options 3.8 External Alarm System Reporting Requirements The DHU provides normally open (NO) and normally closed (NC) form C dry alarm relaycontacts for reporting minor and major alarms to an external alarm system. Aminor alarm isdefined as ahigh temperature condition. Amajor alarm is defined as any fault conditionexcept high temperature. Connections to the alarm contacts are provided through a screw-typeterminal strip. Category 3 or 5 cable should be used for the alarm wires. If an external alarmsystem is not in use, no alarm connections are required.
ADCP-75-136 • Issue 1 • November 2002 Page 23 ©2002, ADC Telecommunications, Inc.3.9 Maintenance Requirements The Digivance ICS requires no regular maintenance to insure continuous and satisfactory operation.Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and correctingservice problems as they occur. Faults and failures arising from within the Digivance ICS willgenerate an external alarm response which includes lighting an LED indicator(s) and closing oropening aset of alarm contacts. When an alarm is reported, it will be necessary to isolate the sourceof the problem by observing the LED indicators on each unit and then performing various tests toisolate the problem. Once the source of the fault is isolated, the appropriate action can be taken tocorrect the problem. The only unit components that can be replaced are the cooling fans which aremounted in the DHU and the DEU and the modular optical transceivers. The failure of any othercomponent within aunit will require replacement of the unit. Basic trouble-shooting procedures areprovided in Section 6of this manual.3.10 System Design Recommendations Follow asystematic process when designing an in-building coverage solution. The followingsub sections outline the four phases of the in-building coverage solution design process.System design and planning services are available from ADC if required. Refer to Section 7of thismanual for additional information.3.10.1 Phase One – Initial Evaluation Qualify the Installation: Confirm that there are no extenuating circumstances that wouldprevent asuccessful installation such as: extreme cellular system issues (blocking, severeinterference, site problems, etc.), building issues, power issues, or safety issues (site shouldnot present any hazards or conditions that would make operation of the equipment unsafe).Analyze the RF Situation: Determine how the system RF link to the outside world will beprovided. Will it beadirect feed from aBTS (microcell) or an over-the-air connection via adonor antenna? If it is a donor antenna, is the customer within the coverage footprint of aserving cell or better? The coverage can be determined during the preliminary walkthrough bychecking the downlink Received Signal Strength Indication (RSSI) outside the building with aunity gain sampling antenna. Sometimes arooftop reading is needed to obtain asufficientsignal level. Note that it is an FCC violation to expand the normal coverage footprint of acellular site with an in-building product. In addition, consider the impact the system will haveon traffic, especially the busy hour. Confirm with the service provider that the expectedincrease in the volume of calls will be addressed (if needed), possibly with additionalequipment such as additional channels or a microcell.Determine the Amount of Building Attenuation: If a donor antenna will provide the RF linkto the BTS, determine if there is enough signal isolation between the donor antenna and the in-building system to avoid afeedback loop and signal degradation. This step can often beaccomplished during the preliminary walkthrough.Discuss Installation with Building Management and Engineering: Discuss all initiallyanticipated Digivance ICS coverage areas (including any obviously desirable cable routings,equipment installations, power and mechanical requirements) with the authorized client and
ADCP-75-136 • Issue 1 • November 2002 Page 24 ©2002, ADC Telecommunications, Inc.building personnel for an initial approval/confirmation. This gives a good estimate of theextent of the system work needed. Occasionally, some of the system design work can beaccomplished at this point.3.10.2 Phase Two – System Design Determine forward and reverse path loss and then design for unity gain on the uplinkand maximum power out of the DRU on the downlink:The overall purpose of theDigivance ICS is to transparently overcome attenuation losses, not to provide additional gainbeyond what is required to bring the signal to unity gain. Complete the following steps tomake this determination:1. Determine the in-building reverse path (uplink) losses at typical operating frequenciesand distances from the subscriber handset (terminal) to the DRU. This information willbe used to determine the optimal uplink signal level to the outside world.2. Determine the typical composite cell site Effective Radiated Power (ERP) into thesystem. Calculate the interface adjustment required to feed the required downlink signallevel to the DHU in order to drive the DRU output signal at the desired level.Determine the location of the DHU and its RF and AC power sources: Complete thefollowing steps to make this determination:1. Determine where and how the DHU will be mounted.2. Determine the location of the DHU AC power source.3. Determine the RF source (local interface with BTS or remote interface with BTS throughdonor antenna) for the DHU.4. If local interface connection with the BTS is required, determine the distance to theDHU.5. If aremote connection with the BTS is required, determine what type of antenna isneeded and where it can be mounted.6. Determine the attenuation or amplification requirements for the DHU to BTS interface.Discuss the design of the Digivance ICS installation with building management andengineering: Explain the proposed system design with building management and engineeringpersonnel and obtain final design approval prior to installation.3.10.3 Phase Three – Installation Use industry standard practices for cabling, installation, and powering to complete thefollowing:1. Install the DHU as described in Section 3 of this manual and adjust the RF interfacelevels based on the system design specifications.2. Install aDRU as described in the Digital Remote Unit Installation Instructions (ADCP -75-112). If a donor antenna is used, install the DHU close to the donor antenna.
ADCP-75-136 • Issue 1 • November 2002 Page 25 ©2002, ADC Telecommunications, Inc.3. Conduct an initial performance evaluation and complete the following:a) Confirm proper isolation, signal quality, and power levels.b) Make test calls from DRU service area and evaluate call quality (confirm withservice provider if desired).c) Address performance issues as needed.4. Install the remaining DRU’s and also any DEU’s as described in the Digital ExpansionUnit Installation Instructions (ADCP-75-111). Test call quality and range of each DRUas needed.5. Check powering and alarm functions of entire system per Digivance ICS specifications.3.10.4 Phase Four - Performance Evaluation Complete the following to evaluate the performance of the Digivance ICS:1. Evaluate the forward path (downlink) and reverse path (uplink) RF signal levels andquality.2. Make continuous calls from DRU to DRU, checking all service areas, seams, andcoverage boundaries for call quality (both DL and UL). Address all quality issues asneeded.3. Place calls both leaving and entering the building(s), in parking lots, etc. Address allquality issues as needed.4. Contact client/service provider to inform them when the Digivance ICS is operational.
ADCP-75-136 • Issue 1 • November 2002 Page 26 ©2002, ADC Telecommunications, Inc.4 DIGITAL HOST UNIT INSTALLATION PROCEDURE This section provides the installation procedures for the DHU. Installation of the DEU(s) andDRU(s) may proceed separately from the installation of the DHU. The installation proceduresfor the DEU are provided in the Digital Expansion Unit Installation Instructions (ADCP -75-111) which are shipped with the DEU. The installation procedures for the DRU, the DRUantennas, and the ac/dc converter (optional DRU accessory) are provided in the DigitalRemote Unit Installation Instructions (ADCP-75-112) which are shipped with the DRU. Whenall units of the Digivance ICS have been installed, refer to Section 5 of this manual for thesystem power up and test procedures.4.1 System Plan Review and Pre-Installation Cable Routing Before beginning the installation, review the system plan with the system engineer. Make sureeach equipment installation site is identified and located and all cable runs are mapped out.The coaxial, DC power, and fiber optic cables may be routed between the various equipmentlocations before the equipment is installed. Whenever possible, route fiber optic cablesthrough conduit or a guideway such as the FiberGuide system. Avoid routing fibers throughladder type cable racks or troughs that do not provide sufficient support to limit bending orprevent accidental damage. Tie-wrapping is not recommended as ameans of securing fiberoptic cables. Make sure to leave sufficient slack at each equipment location for connectorizingand cable management. The procedures for terminating the cables and for connecting thecables to the DHU are provided in the sections that follow.4.2 Tools and Materials The following tools are required in order to complete the procedures in this section:• Box cutter• Pencil or scribe• Medium and small size flat-bladed screwdrivers• TORX screwdriver (T20 bit)• Pliers• Wire cutters• Wire stripper• Tool kit for attaching RJ-45 male connectors to category 3 or 5 cable• Tool kit for attaching N-type male connectors to coaxial cable• Tool kit for attaching LC connectors to multimode fiber optic cable• Drill and assorted drill bits (wall-mount installations only)• Multimeter• Optical power meter• Laser light source• ESD wrist strap
ADCP-75-136 • Issue 1 • November 2002 Page 27 ©2002, ADC Telecommunications, Inc.The following materials are required in order to complete the procedures in this section:• Wall-mount fasteners (wall-mount applications only)• #22 AWG (0.40 mm) category 3or 5cable (for power cable and external alarm connections)• RJ-45 male connectors (for power cable)• #18 AWG (1.00 mm) insulated stranded copper wire (for chassis grounding wire)• Ring terminal for #18 wire (for chassis ground wire connection)• 50 or 62.5 micron core multi-mode or 9 micron core single-mode fiber optic cable• LC-type field installable connectors• High performance, flexible, low loss 50-ohm coaxial cable• N-type male connectors• Wire ties4.3 Unpacking and Inspection This subsection provides instructions for opening the shipping boxes, verifying that all partshave been received, and verifying that no shipping damage has occurred. Use the followingprocedure to unpack and inspect the DHU:1. Open the shipping carton and carefully unpack the DHU from the protective packingmaterial.2. Check the DHU for broken or missing parts. If there are any damages, contact ADC (seeSection 6at the end of this manual) for an RMA (Return Material Authorization) and toreorder if replacement is required.4.4 Mounting Procedure The DHU may be either rack-mounted or wall-mounted. Of the procedures that follow, usewhichever procedure is appropriate for the installation:Note: To insure that all optical connectors and transceivers remain dust-free duringinstallation, leave all dust caps and dust protectors in place until directed to removethem for connection.4.4.1 Rack Mount Installation The DHU may be mounted in either a19-inch or 23-inch EIA or WECO equipment rack. Both USstandard and metric machine screws are included for rack mounting the DHU. When loading theDHU in arack, make sure the mechanical loading of the rack is even to avoid ahazardous conditionsuch as aseverely unbalanced rack. The rack should safely support the combined weight of all theequipment it holds and be securely anchored. In addition, the maximum recommended ambienttemperature for the DHU is 50º C(122º F). Allow sufficient air circulation or space between unitswhen the DHU is installed in amulti-unit rack assembly because the operating ambient temperatureof the rack environment might be greater than room ambient.
ADCP-75-136 • Issue 1 • November 2002 Page 28 ©2002, ADC Telecommunications, Inc.Warning:Wet conditions increase the potential for receiving an electrical shock wheninstalling or using electrically-powered equipment. To prevent electrical shock, never installor use electrical equipment in awet location or during alightning storm.Use the following procedure to install the DHU in the equipment rack:1. The DHU is shipped with the mounting brackets installed for 19-inch rack installations.If mounting the DHU in a19-inch rack, proceed to step 4. If mounting the DHU in a 23-inch rack, proceed to step 2.2. Remove both mounting brackets from the DHU (requires TORX screwdriver with T20bit)3. Reinstall both mounting brackets so the long side of the bracket is flush with the DHUfront panel as shown in Figure 13. Use the screws removed in step 2to re-attach thebrackets to the DHU enclosure.4. Position the DHU in the designated mounting space in the rack (per system design) asshown in Figure 14.17271-AREMOVE AND REINSTALL MOUNTINGBRACKETS AS SHOWN FOR INSTALLATION IN 23-INCH RACKSFigure 13. Installing the Mounting Brackets for 23-Inch Rack Installations 17281-A Figure 14. DHU Rack Mount Installation
ADCP-75-136 • Issue 1 • November 2002 Page 29 ©2002, ADC Telecommunications, Inc.5. Secure the mounting brackets to the rack using the four machine screws provided (use#12-24 screws or M6 x10screws, whichever is appropriate).Note:Provide aminimum of 3 inches (76 mm) of clearance space on both the left andright sides of the DHU for air intake and exhaust.4.4.2 Wall-Mount Installation The DHU may be mounted from any flat vertical surface. It is recommended that abackerboard such as 3/4-inch plywood be applied over the mounting surface to provide asecure basefor attaching the DHU. Two mounting holes are provided in the cable management tray forsecuring the DHU to the mounting surface. The fasteners must be provided by the installer.Use the following procedure to wall-mount the DHU:Warning:Wet conditions increase the potential for receiving an electrical shock wheninstalling or using electrically-powered equipment. To prevent electrical shock, never installor use electrical equipment in awet location or during alightning storm.1. Obtain the appropriate fasteners (lag bolts, screw anchors, etc.) for securing the DHU tothe mounting surface.2. Position the DHU on the mounting surface in the specified location (per the systemdesign) with the front panel facing up as shown in Figure 15.Note:Provide aminimum of 3 inches (76 mm) of clearance space on both the left andright sides of the DHU for air intake and exhaust.17272-ABACKER BOARD SUCHAS 3/4-INCH PLYWOODFigure 15. DHU Wall-Mount Installation
ADCP-75-136 • Issue 1 • November 2002 Page 30 ©2002, ADC Telecommunications, Inc.3. Using the DHU as atemplate, mark the location of the mounting holes on the mountingsurface.Note:The mounting holes in the DHU cable management tray are spaced 11-21/32inches (296 mm) center to center.4. Set the DHU aside and then drill appropriately sized holes in the mounting surface forthe fasteners.5. Partially install the fasteners in the drilled holes. Leave the head of each fastenerprotruding about 1/4 inch (6 mm) from the mounting surface.6. Hang the DHU from the fasteners and then securely tighten each fastener.4.5 Chassis Ground Connections Astud is provided on the front side of the chassis for connecting agrounding wire to thechassis. Use the following procedure to connect the grounding wire to the chassis and to routethe grounding wire to an approved earth ground source:1. Obtain alength of #18 AWG (1.00 mm) insulated stranded copper wire for use as achassis grounding wire.2. Terminate one end of the wire with aring terminal.3. Locate the chassis ground stud at the front of the DHU as shown in Figure 16.17279-AFigure 16. Chassis Ground Stud 4. Secure the ring end of the wire to the chassis ground stud (see Figure 16) using the nutand two star washers provided.5. Route the free end of the chassis grounding wire to an approved (per local code orpractice) earth ground source.6. Cut the chassis grounding wire to length and connect it to the approved ground source asrequired by local code or practice.Note:Be sure to maintain reliable grounding for rack and wall mounted equipment. Payparticular attention to ground source connections.
ADCP-75-136 • Issue 1 • November 2002 Page 31 ©2002, ADC Telecommunications, Inc.4.6 Coaxial Cable Connections The RF interface between DHU and the BTS is supported through apair of type Nfemaleconnectors mounted on the DHU front panel. One connector provides the coaxial cableconnection for the forward path (downlink) signal. The other connector provides the coaxialcable connection for the reverse path (uplink) signal. Coaxial cables link the DHU to the BTSthrough an interface device. Use the following procedure to install the forward and reversepath coaxial cables and connect them to the DHU:1. Obtain the required lengths of high performance, flexible, low loss 50-ohm coaxialcommunications cable (RG 400 or equivalent) for all coaxial connections.2. Route the forward path and reverse path coaxial cables (if not already routed) betweenthe DHU and the specified BTS interface device (per system design) and cut to therequired length. Allow sufficient slack for dressing and organizing cables at the DHU.3. Terminate each cable with atype Nmale connector following the connector supplier’srecommendations.4. Connect the forward path cable to the RF IN connector on the DHU front panel asshown in Figure 17.5. Connect the reverse path cable to the RF OUT connector on the DHU front panel asshown in Figure 17.17273-ATYPE-N MALE CONNECTORRF IN CONNECTOR(FORWARD PATH)RF OUT CONNECTOR(REVERSE PATH)Figure 17. Forward and Reverse Path Coaxial Cable Connections 6. Dress and secure cables at the DHU per standard industry practice.7. Connect the forward and reverse path cables to the local (microcell) or remote (donorantenna) interface device as specified in the instructions provided with that unit.8. Complete all remaining coaxial cable connections between the local interface device andthe BTS or between the remote interface device and the donor antenna as specified in theinstructions provided with the equipment.
ADCP-75-136 • Issue 1 • November 2002 Page 32 ©2002, ADC Telecommunications, Inc.4.7 Modular Optical Transceiver Installation The modular optical transceivers are available separately and may or may not be installed inthe DHU depending on the configuration ordered. If the optical transceivers are factoryinstalled in the DHU, skip this section and proceed to Section 4.8. If the optical transceiversare not factory installed, use the following procedure to install each transceiver:1. Slip on an Electro-Static Discharge (ESD) wrist strap and connect the ground wire to anearth ground source such as the grounding stud on the DHU front panel. Wear the ESDwrist strap while completing the optical transceiver installation procedure.Warning:Electronic components can be damaged by static electrical discharge. To preventESD damage, always wear an ESD wrist strap when handling electronic components.2. Locate the appropriate transceiver socket on the front of the DHU as shown in Figure 18.TXRXDETAIL DRAWING OF OPTICAL TRANSCEIVERSOCKETSDETAIL DRAWINGOF TYPE A AND TYPE BMODULAR OPTICALTRANSCEIVERSTX RXTYPE ATRANSCEIVERTYPE BTRANSCEIVERRELEASELEVERRELEASE TABOPTICAL TRANSCEIVERSOCKETTRANSCEIVER COLOR CODEBLUE = SINGLE-MODE (9 MICRON)BLACK/BEIGE = MULTI-MODE (50 OR 62.5 MICRON)17258-APORTCOVERDUST CAPSFigure 18. Optical Transceiver Installation 3. Select the optical transceiver that corresponds to the type of fiber (single- or multi-mode)required for the installation. The color of the transceiver (see transceiver color code inFigure 18) corresponds to the fiber type.4. Remove the transceiver from the anti-static packaging and orient for installation (seeFigure 18.).Note:Two types of optical transceivers, type Aand type B, are available. Both typesprovide the same functionality. On the type Aoptical transceiver, the release lever (seeFigure 18) must be closed for installation.

Navigation menu