ADC Telecommunications DVICSRIU1900 1900 MHz Remote Interface Unit User Manual 75114 cv

ADC Telecommunications Inc 1900 MHz Remote Interface Unit 75114 cv

manual

ADCP-75-114Issue 2CJanuary 20021188201 Rev ADigivance™ Indoor Coverage SolutionSingle Band Remote Interface Unit (800 or 1900 MHz) User ManualDRAFT
ADCP-75-114 Issue 2C January 2002 Digivance™ Indoor Coverage Solution Single Band Remote Interface Unit (800 and 1900 MHz) User Manual1188201 Rev A
ADCP-75-114 • Issue 2C • January 2002 • Preface Page ii COPYRIGHT 2002, ADC Telecommunications, Inc.All Rights ReservedPrinted in the U.S.A.REVISION HISTORY ISSUE DATE REASON FOR CHANGE Issue 106/2001 OriginalIssue 207/2001 Deleted forward path OIP3 specification from Table 2, Remote Interface Unit Specifications.Issue 2C 01/02 Updated to include specifications for 1900 MHz unit.TRADEMARK INFORMATION ADC is aregistered trademark of ADC Telecommunications, Inc.Digivance is atrademark of ADC Telecommunications, Inc.TORX is aregistered trademark of Textron, Inc.DISCLAIMER OF LIABILITY Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.In noevent shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC furtherdisclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer ofliability applies to all products, publications and services during and after the warranty period.This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension73475 (in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. and Canada), or by e-mail to technical@adc.com.ADC Telecommunications, Inc.P.O. Box 1101, Minneapolis, Minnesota 55440-1101In U.S.A. and Canada: 1-800-366-3891Outside U.S.A. and Canada: (952) 938-8080Fax: (952) 917-1717
ADCP-75-114 • Issue 2C • January 2002 • Preface Page iii 2002, ADC Telecommunications, Inc.TABLE OF CONTENTS Content Page ABOUT THIS MANUAL........................................................................v RELATED PUBLICATIONS .....................................................................v ADMONISHMENTS ..........................................................................v GENERAL SAFETY PRECAUTIONS ............................................................... vi STANDARDS CERTIFICATION .................................................................. vi LIST OF ACRONYMS AND ABBREVIATIONS ......................................................... vi 1 DESCRIPTION ....................................................................... 1 1.1 Primary Functions and Components .................................................. 1 1.2 Mounting .................................................................... 2 1.3 Fault Detection and Alarm Reporting .................................................. 3 1.4 RF Signal Connections ........................................................... 3 1.5 RF Signal Level Adjustments ....................................................... 3 1.6 Powering .................................................................... 3 1.7 Cooling ..................................................................... 3 1.8 User Interface ................................................................. 4 1.9 Specifications ................................................................. 5 2 INSTALLATION ...................................................................... 6 2.1 Tools and Materials ............................................................. 6 2.2 Unpacking and Inspection ......................................................... 7 2.3 Mounting Procedure ............................................................. 7 2.4 Chassis Ground Connection ........................................................ 11 2.5 Coaxial Cable Connections ........................................................11 2.6 External Alarm System Connections ..................................................13 2.7 AC Power Connection ............................................................ 15 3 OPERATION ........................................................................ 16 3.1 Tools and Materials ............................................................. 16 3.2 Turn-Up Unit and Verify Operation.................................................... 16 3.3 Forward Path Level Adjustment ..................................................... 17 3.4 Reverse Path Level Adjustment ..................................................... 18 4 MAINTENANCE ......................................................................20 4.1 Tools and Materials ............................................................. 20 4.2 Fault Detection and Alarm Reporting .................................................. 20 4.3 Fan Replacement...............................................................21 5 CUSTOMER INFORMATION AND ASSISTANCE .................................................. 24
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ADCP-75-114 • Issue 2C • January 2002 • Preface Page v 2002, ADC Telecommunications, Inc.ABOUT THIS MANUAL This publication provides adescription of the Digivance ICS Remote Interface Unit (RIU)plus instructions for installing the RIU. An overview of the Digivance ICS and acompletedescription of the Digital Host Unit (DHU), Digital Remote Unit (DRU) and the DigitalExpansion Unit (DEU) are provided in the Digivance ICS System Installation and OperationManual (See Related Publications section). The RIU is an interface device that is used inconjunction with the Digivance ICS product.RELATED PUBLICATIONS The following lists related manuals and their publication numbers. Copies of thesepublications can be ordered by contacting the ADC Technical Assistance Center at 1-800-366-3891, extension 73475 (in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. and Canada).Title/Description ADCP Number Digivance ICS 800 and 1900 Mhz Systems Installation andOperation Manual (systems without modular optical transceivers) ADCP-75-110Digivance ICS 800 MHz Single or Multi-Mode Fiber System Installationand Operation Manual (systems with modular optical transceivers) ADCP-75-130Digivance ICS Digital Expansion Unit Installation Instructions ADCP-75-111Digivance ICS Digital Remote Unit Installation Instructions ADCP-75-112Digivance ICS Local Interface Unit User Manual ADCP-75-113ADMONISHMENTS Important safety admonishments are used throughout this manual to warn of possible hazardsto persons or equipment. An admonishment identifies apossible hazard and then explainswhat may happen if the hazard is not avoided. The admonishments —in the form of Dangers,Warnings, and Cautions —must be followed at all times. These warnings are flagged by useof the triangular alert icon (seen below), and are listed in descending order of severity of injuryor damage and likelihood of occurrence.Danger:Danger is used to indicate the presence of a hazard that will cause severe personalinjury, death, or substantial property damage if the hazard is not avoided.Warning:Warning is used to indicate the presence of a hazard that can cause severepersonal injury, death, or substantial property damage if the hazard is not avoided.Caution:Caution is used to indicate the presence of a hazard that will or can cause minorpersonal injury or property damage if the hazard is not avoided.
ADCP-75-114 • Issue 2C • January 2002 • Preface Page vi 2002, ADC Telecommunications, Inc.GENERAL SAFETY PRECAUTIONS 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.STANDARDS CERTIFICATION FCC:ThisequipmentcomplieswiththeapplicablesectionsofTitle47 CFRParts 22 and 24.UL/CUL:This equipment complies with UL and CUL 1950 Standard for Safety forInformation Technology Equipment, including Electrical Business Equipment.IC (Industry Canada):This equipment complies with IC Certification RSS-131.LIST OF ACRONYMS AND ABBREVIATIONS The acronyms and abbreviations used in this manual are detailed in the following list:AAmperesAC Alternating CurrentCUL Canadian Underwriters LaboratoriesDC Direct CurrentDEU Digital Expansion UnitDHU Digital Host UnitDRU Digital Remote UnitEIA Electronic Industries AssociationESD Electrostatic DischargeFCC Federal Communications CommissionIC Industry CanadaICS Indoor Coverage SolutionLIU Local Interface UnitNOC Network Operations CenterRIU Remote Interface UnitRF Radio FrequencyUL Underwriters LaboratoriesVVoltsVAC Volts Alternating CurrentVDC Volts Direct CurrentWECO Western Electric Company
ADCP-75-114 • Issue 2C • January 2002 Page 1 ©2002, ADC Telecommunications, Inc.1 DESCRIPTION This section provides acomplete description of the Remote Interface Unit (RIU).1.1 Primary Functions and Components The RIU, shown in Figure 1, serves as the interfacing unit between aremote BTS and theDigivance DHU. The RIU provides the following basic functions:•RF interface to the BTS (through donor antenna) and DHU•Gain adjustments to the forward and reverse path RF signal•Duplexing of the forward and reverse path RF signals•Alarm reporting to an external alarm system16650-AFRONT PANELCABLE MANAGEMENTTRAYMOUNTINGBRACKET(BOTH SIDES)3.5 INCHES(89 mm)11.4 INCHES(290 mm)3.9 INCHES(99 mm)17.2 INCHES(437 mm)13.6 INCHES(345 mm)Figure 1. Remote Interface Unit Aremote interface between the DHU and the cell site BTS via a donor antenna requiresspecific RF input and output signal levels (within normal operating range) at the DHU andantenna. The correct levels at the DHU and antenna can be provided using the RemoteInterface Unit (RIU). The RIU is an accessory item that is used to adjust both the forward andreverse path RF signal levels. In the forward path, the RIU provides gain adjustments in 1 dBincrements over a range of +9 to +40 dB.In the reverse path, the RIU provides gainadjustments in 1 dB increments over a range of +28 to +59 dB (800 Mhz) or +33 to +64 dB(1900 MHz).The RIU connects to adirectional antenna through aduplexer (internal) which providesseparate forward and reverse path connections for the DHU. In the forward path (downlink),the recommended composite maximum RF input signal level at the DHU is –20 dBm.Whenthe level of the RF input signal at the DHU is –20 dBm, the level of the RF output signal atthe DRU will be +13 dBm (800 MHz) or +16 dBm (1900 MHz).
ADCP-75-114 • Issue 2C • January 2002 Page 2 ©2002, ADC Telecommunications, Inc.In the reverse path, the input signal level received at the DRU antenna will vary depending onthe path loss between the cell phone and the antenna and the strength of the cell phone signal.When the level of the reverse path (uplink) signal at the DRU antenna is at amaximum, thecomposite maximum level of the output signal from the DHU will be –30 dBm.Therefore, itwill generally be necessary to add some gain to the reverse path signal in order to provide theoutput RF signal level required at the donor antenna. Ablock diagram showing atypical remoteDHU to BTS interface is provided in Figure 2.DIRECTIONAL ANTENNATO/FROM CELL SITE BTS16425-BREMOTEINTERFACEUNITFORWARD(DOWNLINK)REVERSE (UPLINK)-40 dBm(COMPOSITEMAX)-20 dBm(COMPOSITE MAX)-30 dBm(COMPOSITE MAX)DIGITALHOSTUNITOPTICAL LINKOPTICAL LINKDIGITALREMOTEUNITDIRECTIONAL ANTENNATO/FROM HANDSETS+13 dBm FOR 800 MHz+16 dBm FOR 1900 MHz(COMPOSITE MAX)Figure 2. Remote BTS Interface Block Diagram The RIU consists of an electronic circuit board assembly, power supply, duplexer, and linearpower amplifier that are mounted within apowder-coated sheet metal enclosure. The metalenclosure provides amounting point for the electronic components, serves as aheat sink, andcontrols RF emissions. Except for the fan, the electronic components are not user replaceable.The RIU is designed for use within anon-condensing indoor environment such as inside awiring closet or cabinet. All controls, connectors, and indicators are mounted on the RIU frontpanel for convenient access. Cable management functions for the power and coaxial cables areprovided by a cable management tray that extends outward from the RIU front panel.Two versions of the 800 Mhz RIU are available. One version is used to interface with an A-bandBTSandtheotherversion isusedtointerfacewithaB-band BTS. Six versionsofthe1900 MHzRIUare available,oneversion foreachofthesix 1900 MHzsub-bands. Theappropriatefrequencyandsub-band are clearlymarkedon alabelattachedtotheRIUcablemanagementtray1.2 Mounting The RIU may be used in both rack-mount and wall-mount applications. For rack mountapplications, apair of reversible mounting brackets is provided that allow the RIU to be mounted ineither a19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel ofthe RIU is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm)beyond the front panel. Fasteners are provided for rack-mount applications.For wall-mount applications, apair of holes is provided in the cable management tray whichallow the RIU to be mounted on any flat vertical surface. The mounting brackets may also beremoved and reinstalled is such away as to be used to secure the RIU to aflat vertical surface.The RIU should be oriented with the front panel facing upward when wall-mounted. Thefasteners must be provided by the installer in wall-mount applications.
ADCP-75-114 • Issue 2C • January 2002 Page 3 ©2002, ADC Telecommunications, Inc.1.3 Fault Detection and Alarm Reporting The RIU is designed to detect apower amplifier over or under current condition and ahightemperature condition. Asingle front panel Light Emitting Diode (LED) indicator turns fromgreen to red or yellow if afault is detected. Aset of alarm contacts (normally open andnormally closed) are also provided for reporting an alarm to an external alarm system when afault is detected. Both major alarm (power amplifier over/undercurrent condition or powerfailure) and minor alarm (high temperature) contacts are provided.1.4 RF Signal Connections The RF signal connections between the RIU and DHU are supported through apair of type Nfemale connectors mounted on the RIU front panel. One connector is used for connecting theforward path coaxial cable and the other connector is used for connecting the reverse path coaxialcable. The RF signal connection between the RIU and the donor antenna is supported through asingle type Nfemale connector. The single connector is used for connecting the coaxial jumpercable that links the RIU to the donor antenna. The DHU cannot be connected directly to adonorantenna and requires an interface device such as the RIU.1.5 RF Signal Level Adjustments The RIU is equipped with two digital attenuators for adjusting the signal levels of the forwardand reverse path RF signals. The attenuators provide an attenuation adjustment range of 0 to31 dB and can be set in 1 dB increments. In the forward path,this range provides amaximum gain of +40 dB (attenuator set to 0) or a minimum gain of +9 dB (attenuator set to31 dB). In the reverse path for 800 MHz units, this range provides amaximum gain of +59dB (attenuator set to 0) or a minimum gain of +28 dB (attenuator set to 31 dB). In the reversepath for 1900 MHz units, this range provides amaximum gain of +64 dB (attenuator set to 0)or a minimum gain of +33 dB (with attenuator set to 31 dB).Each attenuator is adjustable by means of two rotary switches which are mounted behind theRIU front panel. Access to each rotary switch is through asmall hole. Asmall screwdriver isrequired to adjust the switch setting. Turning each switch adds or removes attenuation andtherefore adjusts the signal level of the specified signal path.1.6 Powering The RIU is powered by 120/240 VAC (50–60 Hz) power which is supplied through astandardthree-conductor AC power cord. The power cord is provided with the RIU and is 98 inches(2.5 meters )long. Aresetable circuit breaker/On-Off switch is provided at the unit frontpanel. The switch applies power to the RIU internal power supply.1.7 Cooling Continuous air flow for cooling is provided by a fan mounted on the right side of the housing.Aminimum of 3 inches (76 mm) of clearance space must be provided on both the left andright sides of the RIU for air intake and exhaust. An alarm is provided that indicates if ahightemperature condition (>58º C/136º F) occurs. The fan may be field-replaced if it fails.
ADCP-75-114 • Issue 2C • January 2002 Page 4 ©2002, ADC Telecommunications, Inc.1.8 User Interface The RIU user interface consists of the various connectors, switches, terminals, and LED thatare provided on the RIU front panel. The RIU user interface points are indicated in Figure 3and described in Table 1.NOTE: SHOWN WITHOUTCABLE MANAGEMENT TRAY(3) AC POWER CORDCONNECTOR(8) ALARM LEDINDICATOR(9) ALARMCONNECTOR(1) ANTENNACONNECTOR(5) FORWARD LEVELADJUSTMENTSWITCHES(2) AC POWER ON/OFF SWITCH(6) FORWARD RF OUTPUTCONNECTOR(7) REVERSE RF INPUTCONNECTOR(4) REVERSE LEVELADJUSTMENTSWITCHES16651-AFigure 3. Remote Interface Unit User Interface Table 1. Remote Interface Unit User Interface REFNo. USER INTERFACE DESIGNATION DEVICE FUNCTIONAL DESCRIPTION 1ANTENNA N-type female RFcoaxial connector Used for connecting the donor antennacoaxial cable.2I/O I/O rocker switch/circuit breaker Provides AC power On/Off control andAC power over current protection.3POWER 3-wire AC powercord connector Used for connecting the AC power cord.4REV LEVEL ADJMSB LSBRotary switch Used to adjust the reverse path RF signallevel by adding or removing attenuation.5FWD LEVEL ADJMSB LSBRotary switch Used to adjust the forward path RF signallevel by adding or removing attenuation.6FORWARD OUT N-type female RFcoaxial connector Used for connecting the RIU to DHUforward path coaxial cable.7REVERSE IN N-type female RFcoaxial connector Used for connecting the DHU to RIUreverse path coaxial cable.8ALARMS Multi-colored LED(Red/Green/Yellow) Indicates if the RIU is normal or faulty. (seeSection 3for adetailed description)9MINOR MAJOR Screw-type terminalconnector (14–26AWG)Used for connecting the RIU to an externalalarm system. Includes normally open (NO),normally closed (NC), and common (COM)wiring connections.
ADCP-75-114 • Issue 2C • January 2002 Page 5 ©2002, ADC Telecommunications, Inc.1.9 Specifications The specifications for the RIU are provided in Table 2. All specifications apply after afiveminute warm-up period.Table 2. Remote Interface Unit Specifications PARAMETER SPECIFICATION REMARKS EnvironmentalOperating Temperature 0º to 50º C (32º to 122º F)Storage Temperature –30º to +70º C (–22 to 158º F)Humidity No condensationWeather resistance Indoor installation onlyRF Forward Path 800 MHz unit 869 to 894 MHz1900 MHz unit 1930 to 1990 MHzRF Gain +9 to +40 dB Adjustable in 1 dB stepsGain Variation ± 1.5 dB Over frequency, temperature,and unit-to-unit.Gain stepsize accuracy ±(0.2 + 3% of gain setting in dB)dBOutput power –20 dBm composite maximum toDigivance ICS input With proper input signal andattenuation settingInput level –29 dBm composite maximum To drive Digivance ICS DHUVSWR 1.5:1 or better, both portsRF Reverse Path 800 MHz unit 824 to 849 MHz1900 MHz unit 1850 to 1910 MHzRF Gain800 MHz1900 MHz +28 to +59 dB+33 to +64 dB Adjustable in 1 dB stepsGain Variation800 MHz1900 MHz ±1.5 dB±3 dB Over frequency, temperature,and unit-to-unit.Gain stepsize accuracy ±(0.2 + 3% of gain setting in dB)dBOutput power800 MHz1900 MHz +29 dBmcompositemaximum+34 dBm composite maximum When driven with DigivanceICS DHUInput level(Recommendedcomposite maximum)–30 dBm FromDigivanceICSDHUoutputVSWR 1.5:1 or better, both portsOIP3 ≥+46 dBm(continued)
ADCP-75-114 • Issue 2C • January 2002 Page 6 ©2002, ADC Telecommunications, Inc.Table 2. Remote Interface Unit Specifications, continued PARAMETER SPECIFICATION REMARKS Physical Weight 20.2 lbs (8.7 kg)Dimensions (H×W×D) 3.5 ×17.2 ×17.25 Inches(89 ×437 ×438 mm) Dimension for width does notinclude the mounting bracketsColor Putty whiteRF connections Type N FemaleAlarm connection Screw terminals (14–26 AWG) NO, NC, and COMReliability MTBF 80,000 hoursElectrical Power source 120–240 VAC, 50–60 HzAC Connection IEC 320 MalePower consumption 250 W MaximumCurrent rating 85–250 VAC, 2Amp inputDonor Antenna Type DirectionalOutput 1000 watts composite maximum2 INSTALLATION This section provides the installation procedures for the RIU. Installation of the variousDigivance ICS units may proceed separately from the installation of the RIU.2.1 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•Phillips screwdriver (#2)•TORX screwdriver (T20)•Wire cutters•Wire stripper•Tool kit for attaching N-type male connectors to coaxial cable•Drill and assorted drill bits (wall-mount installations only)
ADCP-75-114 • Issue 2C • January 2002 Page 7 ©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 3 or 5 cable (for external alarm connections)• #18 AWG (1.00 mm) insulated stranded copper wire (for chassis grounding wire)•Ring terminal for #18 wire (for chassis ground wire connection)•High performance, flexible, low loss 50-ohm coaxial cable•N-type male connectors•Wire ties2.2 Unpacking and Inspection This sub-section 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 RIU:1. Open the shipping carton and carefully unpack the RIU from the protective packingmaterial.2. Check the RIU for broken or missing parts. If there are any damages, contact ADC (seeSection 5at the end of this manual) for an RMA (Return Material Authorization) and toreorder if replacement is required.2.3 Mounting Procedure The RIU may be either rack-mounted or wall-mounted. Of the procedures that follow, usewhichever procedure is appropriate for the installation.2.3.1 Rack-Mount Installation The RIU may be mounted in either a19-inch or 23-inch EIA or WECO equipment rack. BothUS standard and metric machine screws are included for rack mounting the RIU. Whenloading the RIU in arack, make sure the mechanical loading of the rack is even to avoid ahazardous condition such as aseverely unbalanced rack. The rack should safely support thecombined weight of all the equipment it holds. In addition, the maximum recommendedambient temperature for the RIU is 50º C (122º F). Allow sufficient air circulation or spacebetween units when the RIU is installed in amulti-unit rack assembly because the operatingambient temperature of the rack environment might be greater than room ambient.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 RIU in the equipment rack:1. The RIU is shipped with the mounting brackets installed for 19-inch rack installations. Ifmounting the RIU in a19-inch rack, proceed to step 4. If mounting the RIU in a23-inchrack, proceed to step 2.
ADCP-75-114 • Issue 2C • January 2002 Page 8 ©2002, ADC Telecommunications, Inc.2. Remove both mounting brackets from the RIU (requires TORX screwdriver with T20 bit).3. Reinstall both mounting brackets so the long side of the bracket is flush with the RIUfront panel as shown in Figure 4. Use the screws removed in step 2to re-attach thebrackets to the RIU enclosure.16487-BREMOVE AND REINSTALL MOUNTINGBRACKETS AS SHOWN FOR INSTALLATION IN 23-INCH RACKSFigure 4. Installing the Mounting Brackets for 23-Inch Rack Installations 4. Position the RIU in the designated mounting space in the rack (per system design) andthen secure the mounting brackets to the rack using the four machine screws provided(use #12-24 screws or M6 x10screws, whichever is appropriate) as shown in Figure 5.Note:Provide aminimum of 3 inches (76 mm) of clearance space on both the left andright sides of the RIU for air intake and exhaust.16483-BFigure 5. RIU Rack Mount Installation
ADCP-75-114 • Issue 2C • January 2002 Page 9 ©2002, ADC Telecommunications, Inc.2.3.2 Wall-Mount Installation The RIU 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 RIU. Two mounting holes are provided in the cable management tray forsecuring the RIU to the mounting surface. In addition, the mounting brackets may be removedand then reinstalled in such away that they can be used for securing the RIU to the mountingsurface. Either method for mounting may be used at the discretion of the installer. Thefasteners must be provided by the installer. Use the following procedure to wall-mount theRIU: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 RIU tothe mounting surface.2. If the mounting brackets will be used to secure the RIU to the mounting surface, proceedto step 3. If the mounting brackets will not be used to secure the RIU to the mountingsurface, skip steps 3and 4and proceed to step 5.3. Remove both mounting brackets from the RIU (requires TORX screwdriver with T20bit).4. Reinstall both mounting brackets so the short side of the bracket is flush with the bottomof the RIU as shown in Figure 6. Use the screws removed in step 3to re-attach thebrackets to the RIU enclosure.16484-BFigure 6. Installing the Mounting Brackets for Wall-Mount Installation 5. Position the RIU on the mounting surface in the specified location (per the systemdesign) with the front panel facing up as shown in Figure 7.Note:Provide aminimum of 3 inches (76 mm) of clearance space on both the left andright sides of the RIU for air intake and exhaust.
ADCP-75-114 • Issue 2C • January 2002 Page 10 ©2002, ADC Telecommunications, Inc.6. Using the RIU as atemplate, mark the location of the mounting holes on the mountingsurface.Note: The mounting holes in the RIU cable management tray are spaced 11-21/32 inches(296 mm) center to center.7. Set the RIU aside and then drill appropriately sized holes in the mounting surface for thefasteners.8. If using only the mounting brackets to secure the RIU to the mounting surface, skip step9and proceed to step 10. If using the cable management tray mounting holes to securethe RIU to the mounting surface, proceed to step 9.9. Partially install the fasteners for the cable management tray mounting holes. Leave thehead of each fastener protruding about 1/4 inch (6 mm) from the mounting surface.10. Hang the RIU from the fasteners installed in step 9 or position the RIU for installation ifusing only the mounting brackets.11. Install and securely tighten all fasteners.16486-BBACKER BOARD SUCHAS 3/4-INCH PLYWOODFigure 7. RIU Wall-Mount Installation
ADCP-75-114 • Issue 2C • January 2002 Page 11 ©2002, ADC Telecommunications, Inc.2.4 Chassis Ground Connection Astud is provided on the rear 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 rear of the RIU as shown in Figure 8.4. Attach the ring end of the wire to the chassis ground stud (see Figure 8).5. Route the free end of the chassis grounding wire to an approved (per local code orpractice) earth ground source.16169-AFigure 8. Chassis Ground Stud 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.2.5 Coaxial Cable Connections The RF signal connections between the RIU and DHU are supported through apair of type Nfemale connectors mounted on the RIU front panel. One connector is used for connecting theforward path coaxial cable and the other connector is used for connecting the reverse pathcoaxial cable. The RF signal connection between the RIU and the donor antenna is supportedthrough asingle type Nfemale connector. The single connector is used for connecting thecoaxial jumper cable that links the RIU to the donor antenna.
ADCP-75-114 • Issue 2C • January 2002 Page 12 ©2002, ADC Telecommunications, Inc.2.5.1 Forward and Reverse Path Coaxial Cable Connections Use the following procedure to install the forward and reverse path coaxial cables that link theRIU to the DHU:1. Locate the forward and reverse path coaxial cables that were routed to the RIU from theDHU.Note:The procedures for routing the reverse and forward path coaxial cables from theDHU to the RIU and for connecting the cables to the DHU are covered in the DigivanceICS System Installation and Operation Manual (See Related Publications section) whichis provided with the DHU.2. Terminate each cable with atype Nmale connector following the connector supplier’srecommendations.3. Connect the forward path cable to the FORWARD OUT connector on the RIU frontpanel as shown in Figure 9.16652-AFORWARD OUTCONNECTORREVERSE INCONNECTORTYPE-N MALE CONNECTORFigure 9. FORWARD OUT and REVERSE IN Coaxial Cable Connections 4. Connect the reverse path cable to the REVERSE IN connector on the RIU front panel asshown in Figure 9.5. Dress and secure cables at the RIU.2.5.2 Antenna Coaxial Cable Connection Use the following procedure to install the coaxial cable that links the RIU to the donorantenna:Note:To comply with Maximum Permissible Exposure (MPE) requirements, the maximumcomposite output from the antenna cannot exceed 1000 watts EIRP and the antenna must bepermanently installed in a fixed location that provides at least 6meters (20 feet) of separationfrom all persons.
ADCP-75-114 • Issue 2C • January 2002 Page 13 ©2002, ADC Telecommunications, Inc.1. Obtain the required length of high performance, flexible, low loss 50-ohm coaxialcommunications cable for the antenna coaxial connection.2. Route the coaxial cable between the RIU and the donor antenna (per system design) andcut to the required length. Allow sufficient slack for dressing and organizing cables at theRIU and antenna.3. Terminate each cable end with atype Nmale connector following the connectorsupplier’s recommendations.4. Connect the RIU end of the antenna cable to the ANTENNA connector on the RIU frontpanel as shown in Figure 10.5. Connect the antenna end of the antenna cable to the donor antenna.6. Dress and secure cables at the RIU and donor antenna.16653-AANTENNACONNECTORTYPE-N MALE CONNECTORFigure 10. RIU Antenna Cable Connection 2.6 External Alarm System Connections The alarm interface between the RIU and an external alarm system is supported by a six-terminal plug (with screw-type terminals) that connects to areceptacle on the RIU front panel.The terminal plug provides connections to normally open (NO) and normally closed (NC) drytype alarm contacts for both minor and major alarms. Acategory 3 or 5 cable is typically usedto connect the RIU to the external alarm system. Use the following procedure to install thealarm wiring and connect it to the RIU:
ADCP-75-114 • Issue 2C • January 2002 Page 14 ©2002, ADC Telecommunications, Inc.1. Obtain the required length of category 5cable.2. Route the cable between the RIU and the external alarm system (if not already routed)and then cut to required length. Allow sufficient slack for dressing and organizing thecable at the RIU.3. Strip back the outer cable sheath and insulation to expose the wires at both ends of thecable and strip back 0.2 inches (5 mm) of insulation each wire.4. Connect the Major alarm wire pair to the MAJOR COM/NC or MAJOR COM/NOterminals (whichever is required by the external alarm system) on the RIU alarm terminalconnector (supplied with RIU) as shown in Figure 11.16482-BALARMCONNECTORMAJORALARMWIRESMINORALARMWIRESALARM CONNECTORDETAILFigure 11. External Alarm System Connections 5. Connect the Minor alarm wire pair to the MINOR COM/NC or MINOR COM/NOterminals (whichever is required by the external alarm system) on the RIU alarm terminalconnector as shown in Figure 11.6. Connect the Major and Minor alarm wire pairs to the appropriate terminals on theexternal alarm system.7. Dress and secure cable.
ADCP-75-114 • Issue 2C • January 2002 Page 15 ©2002, ADC Telecommunications, Inc.2.7 AC Power Connection The AC power interface between the RIU and the AC power source is supported by a 3-wireAC power cord connector located on the RIU front panel. The AC connector provides aconnection point for the power cord which is provided separately with the RIU. Use thefollowing procedure to install the AC power cord:1. Place the RIU AC power ON/OFF switch, shown in Figure 12, in the OFF position(press O).16654-AAC POWER CORDFigure 12. AC Power Connection 2. Locate the AC power cord which is provided separately with the RIU. Use only the ACpower cord provided with the RIU or an equivalent UL listed and CSA certified 3-conductor, 18 AWG cord terminated in amolded-on plug cap rated 125 V, 15 A with aminimum length of 6 feet (1.8 m).Note:The RIU is intended to be used with a 3-wire grounding type plug which has agrounding pin. Equipment grounding is to ensure safe operation. Do not defeat thegrounding means. Verify RIU is reliably grounded when installed.3. Connect the receptacle end of the power cord to the AC connector on the RIU.4. Route the plug end of the power cord to the specified AC outlet (per the system design)and connect plug to outlet.Warning:The current rating of the RIU is 2Amps at 120 VAC. Avoid overloading circuitswhich may cause damage to over-current protection devices and supply wiring.5. Dress and secure cable.6. When the RIU installation is complete, refer to Section 3 of this manual for the unit turn-up and test procedures.
ADCP-75-114 • Issue 2C • January 2002 Page 16 ©2002, ADC Telecommunications, Inc.3 OPERATION This section provides guidelines for turning-up the RIU, verifying that the RIU is operatingproperly, setting the forward and reverse path signal levels, and correcting any installationproblems.3.1 Tools and Materials The following tools and materials are required in order to complete the procedures in thissection:•RF power meter•Pencil or pen•Writing pad3.2 Turn-Up Unit and Verify Operation The process of turning-up the RIU and verifying operation involves setting the forward andreverse path signal levels, turning on the power, verifying that the LED indicator showsnormal operation, and then measuring the forward and reverse path signal levels. Refer toTable 3 for adetailed description of the ALARM LED indicator.Table 3. Remote Interface Unit LED Indicator INDICATOR COLOR DESCRIPTION ALARMGreenYellowRedOffIndicates if the RIU is normal or if afault is detected.RIU in normal state, no faults detected.High temperature fault detected. (Minor alarm)Over or undercurrent fault on power amplifier detected. (Major alarm)AC power off or RIU internal fault.Use the following procedure to power-up the system:1. Temporarily disconnect the alarm system or notify the alarm system provider that unitturn-up is in progress.2. Adjust the forward and reverse path signal levels as specified in Sections 3.3 and 3.4.3. Verify that the donor antenna is properly installed and connected.Note:To comply with Maximum Permissible Exposure (MPE) requirements, themaximum composite output from the antenna cannot exceed 1000 watts EIRP and theantenna must be permanently installed in a fixed location that provides at least 6meters(20 feet) of separation from all persons.4. Verify that the RIU is connected to the appropriate AC outlet.5. Place the ON/OFF switch on the RIU in the ON position (press I).6. Verify that the ALARM LED on the RIU turns green.
ADCP-75-114 • Issue 2C • January 2002 Page 17 ©2002, ADC Telecommunications, Inc.7. Check the forward path RF signal level at the DHU RF IN port and verify that the DHUcomposite input signal level is –20 dBm (provides maximum DRU output). Re-adjustFWD LEVEL ADJ rotary switches to add or remove gain if required.8. Check the reverse path RF signal level at the antenna and verify that the signal level iscorrect per the system design. Re-adjust REV LEVEL ADJ rotary switches to add orremove gain if required.9. Reconnect the alarm system or notify the alarm system provider that unit turn-up is complete.3.3 Forward Path Level Adjustment The level of the composite RF output signal from the donor antenna will vary depending onthe gain of the antenna, the number of channels present, and the level of the channels. Formaximum output at the DRU, the forward path signal level must be adjusted to provide a–20dBm composite maximum input signal level at the DHU input port. Use the followingprocedure to adjust the RIU to provide the required forward path signal level at the DHU:1. Connect a power meter to the antenna cable. The required signal levels and test pointsare shown in Figure 13.DIRECTIONAL ANTENNA TO/FROM CELL SITE BTS16655-BREMOTEINTERFACEUNITFORWARD(DOWNLINK)REVERSE (UPLINK)+13 dBm FOR 800 MHz+16 dBm for 1900 MHz(COMPOSITE MAX)-40 dBm(COMPOSITEMAX)DIGITALHOSTUNITOPTICAL LINKOPTICAL LINKDIGITALREMOTEUNITDIRECTIONAL ANTENNATO/FROM HANDSETSMEASURE RF LEVELOF A SINGLE CARRIERAT ANTENNA OUTPUTCHECK SYSTEM DESIGN SPECIFICATIONS FOR RF LEVELREQUIRED AT DONOR ANTENNA-20 dBmCOMPOSITE MAXINPUT TO DHU -30 dBm(COMPOSITE MAXINPUT TO RIU)Figure 13. Signal Levels and Test Points 2. Measure the power level of the composite output signal from the antenna. If the powerlevel exceeds –29 dBm, use an external attenuator to reduce the signal level until it fallswithin the range of –29 to –60 dBm.3. Subtract –20 (the composite input signal level required at the DHU to maximize the outputsignal at the DRU) from the level measured in step 2. The difference equals the amount ofgain required to raise the forward path signal to –20 dBm.4. Disconnect the power meter from the antenna cable and connect the antenna cableconnector to the RIU.5. Using asmall screwdriver, adjust the FWD LEVEL ADJ rotary switches to insert thegain required to provide a–20 dBm signal at the DHU. The RIU provides aforward pathsignal adjustment range of from +9 dB to +40 dB. Refer to Figure 14 for adescription ofhow the rotary switches work and to Table 4 for the adjustment settings.
ADCP-75-114 • Issue 2C • January 2002 Page 18 ©2002, ADC Telecommunications, Inc.Note:An input signal level of –20 dBm at the DHU produces an output signal level of+13 dBm (800 MHz) or +16 dBm (1900 MHz) at the DRU. If maximum output is notrequired at the DRU, the DHU input signal level may be reduced in order to produce alower DRU output signal level. Decreasing the DHU input signal level by 1 dB producesacorresponding 1 dB drop in the DRU output signal level.6. Disconnect the power meter from the forward path cable and reconnect cable to DHU RFIN connector.FWD LEVEL ADJMSB LSB00162468101214REV LEVEL ADJMSB LSB00162468101214INSERT A SMALL SCREWDRIVER INTO THE SLOT.ROTATE THE SWITCH UNTIL THE WHITE ARROW ISALIGNED WITH THE REQUIRED SETTING. 16649-AFigure 14. Rotary Switch Adjustment 3.4 Reverse Path Level Adjustment The level of the composite RF signal that should be input to the antenna will vary dependingon the maximum acceptable DRU path loss per the system design. Typically, the designobjective is for the Digivance system to provide aunity gain. Use the following procedure toadjust the RIU to provide the required reverse path signal level at the antenna:1. Determine the maximum acceptable DRU path loss per the system design specifications.2. Determine the total cable loss that is imposed by the reverse path coaxial cable that linksthe DHU to the RIU, the coaxial cable that links the RIU to the antenna, and any otherdevices (splitters, connectors, etc.) that will impose aloss on the signal.3. Determine the total gain provided by the DRU antenna and the donor antenna.4. Calculate the total gain that must be added by the RIU using the following formula:Reverse Path RIU Gain = [ System Insertion Loss +Designed Path Loss] –[Systemgain (10 dB at 800 MHz, 14 dB at 1900 MHz) +Antenna Gain]The result should be negative which indicates that gain is required.5. Using asmall screwdriver, adjust the REV LEVEL ADJ rotary switches to insert thegain required as determined in step 4. Refer to Figure 14 for adescription of how therotary switches work and to Table 4 for the adjustment settings.Note:The RIU provides areverse path signal adjustment range of from +28 dB to +59 dB(for 800 MHz) and +33 dB to +64 dB (for 1900 MHz).
ADCP-75-114 • Issue 2C • January 2002 Page 19 ©2002, ADC Telecommunications, Inc.Table 4. RIU Rotary Switch Adjustment Settings REVERSE GAIN SETTINGS FORWARD GAIN SETTINGS 800 MHZ GAIN (+dB) 1900 MHZ GAIN (+dB) MSB SETTING LSB SETTING 800/1900 MHZ GAIN(+dB) MSB SETTING LSB SETTING 59 64 0 0 40 0 058 63 0 1 39 0 157 62 0 2 38 0 256 61 0 3 37 0 355 60 0 4 36 0 454 59 0 5 35 0 553 58 0 6 34 0 652 57 0 7 33 0 751 56 0 8 32 0 850 55 0 9 31 0 949 54 0 10 30 0 1048 53 0 11 29 0 1147 52 0 12 28 0 1246 51 0 13 27 0 1345 50 0 14 26 0 1444 49 0 15 25 0 1543 48 16 0 24 16 042 47 16 1 23 16 141 46 16 2 22 16 240 45 16 3 21 16 339 44 16 4 20 16 438 43 16 5 19 16 537 42 16 6 18 16 636 41 16 7 17 16 735 40 16 8 16 16 834 39 16 9 15 16 933 38 16 10 14 16 1032 37 16 11 13 16 1131 36 16 12 12 16 1230 35 16 13 11 16 1329 34 16 14 10 16 1428 33 16 15 9 16 15
ADCP-75-114 • Issue 2C • January 2002 Page 20 ©2002, ADC Telecommunications, Inc.4 MAINTENANCE This section explains the alarm reporting system, provides amethod for isolating andtroubleshooting faults, and provides procedures for replacing the cooling fan.The RIU requires no regular maintenance to insure continuous and satisfactory operation.Maintenance, as it applies to the RIU, primarily involves diagnosing and correcting serviceproblems as they occur. When an alarm is reported, it will be necessary to follow asystematictroubleshooting procedure to locate the problem. Once the source of the problem is isolated,the appropriate corrective action can be taken to resolve the problem. The only component thatcan be replaced is the cooling fan. The failure of any other component within the RIU requiresreplacement of the RIU.4.1 Tools and Materials The following tools and materials are required in order to complete the procedures in thissection:•ESD wrist strap•Small size flat-bladed screwdriver•TORX screwdriver (T10)4.2 Fault Detection and Alarm Reporting Detection of a fault by the RIU generates an external alarm response. An ALARM LEDindicator is provided on the RIU front panel to visually indicate when afault is detected. Inaddition, normally open (NO) and normally closed (NC) dry alarm contacts are provided toreport minor and major alarms to an external alarm system. Aminor alarm is defined as ahigh temperature condition. Amajor alarm is defined as apower amplifier over/undercurrentcondition.When the RIU alarm contacts are connected to an external alarm system, detection of a faultwill generate an alarm at the Network Operations Center (NOC). Whenever aproblem isreported, refer to Table 5 to isolate and correct the fault.
ADCP-75-114 • Issue 2C • January 2002 Page 21 ©2002, ADC Telecommunications, Inc.Table 5. Fault Isolation and Troubleshooting Alarm Type Minor ALARM Indicator: Yellow Problem The RIU is overheating. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Air intake or exhaust openings to RIUchassis blocked.2. Ambient temperature > 58º C/136º F.3. Faulty fan.4. Faulty RIU.1. Remove cause of air-flow blockage.2. Reduce ambient temperature.3. Replace fan (see Section 4.3).4. Replace RIU.Alarm Type: Major ALARM Indicator Red: Problem Over or undercurrent condition detected at power amplifier. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty RIU. 1. Replace RIU.Alarm Type Major ALARM Indicator Off Problem The RIU is not powered. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. AC power source off or disconnected.2. Faulty RIU1. Restore AC power.2. Replace RIU.4.3 Fan Replacement It is recommended that the fan (catalog number DGVI-200000FAN) be replaced every five years.Replacement of afan requires that the RIU be turned off for ashort period of time. This will dropall existing calls, cause atemporary loss of service, and generate amajor alarm. Use the followingprocedure to replace the RIU cooling fan:1. Before touching the RIU or handling afan, slip on an Electro-Static Discharge (ESD)wrist strap and connect the ground wire to an earth ground source. Wear the ESD wriststrap while completing each section of the fan installation procedure.Warning:Electronic components can be damaged by static electrical discharge. To preventESD damage, always wear an ESD wrist strap when working on the RIU and when handlingelectronic components.2. Notify the NOC or alarm monitoring system operator that the system is going offline.3. Place the RIU AC power On/Off switch in the OFF position (press O)and disconnect theAC power cord.Caution:High voltage components are present within the RIU enclosure. Disconnect the ACpower cord from the AC power source before proceeding to step 4.4. Remove the four flat-head screws (requires TORX screwdriver with T15 bit) that secure thefan/grill assembly to the side of the enclosure as shown in Figure 15 and save for reuse.
ADCP-75-114 • Issue 2C • January 2002 Page 22 ©2002, ADC Telecommunications, Inc.16637-ALATCHFigure 15. Fan/Grill Assembly Removal 5. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness isexposed and the connector is accessible.6. Lift the small latch on the wiring harness connector (see Figure 15) and carefully unplugthe connector from the circuit board connector.7. Remove the four plastic rivets that secure the faulty fan to the grill by pushing outwardon rivet center post until the rivet can be withdrawn from the grill as shown in Figure 16.16485-BFigure 16. Removing Fan From Grill 8. Remove the fan from the grill and then locate the replacement fan.9. Use the rivets removed in step 7to secure the replacement fan to the grill. Orient the fanso the wiring harness is on the right side (side of fan that faces toward back of enclosurewhen installed) and the arrow on the fan housing faces into the enclosure.10. Connect the wiring harness connector to the circuit board connectors.11. Route the wiring harness under the fan.
ADCP-75-114 • Issue 2C • January 2002 Page 23 ©2002, ADC Telecommunications, Inc.12. Secure the fan/grill assembly to the side of the enclosure (see Figure 15) using the fourflat-head screws removed in step 4.13. Reconnect the AC power cord and place the RIU AC power On/Off switch in the ONposition (press I).14. Verify that the fan runs properly following power up.15. Notify the NOC or alarm monitoring system operator that the system is going back online.
ADCP-75-114 • Issue 2C • January 2002 Page 24 5 CUSTOMER INFORMATION AND ASSISTANCE EUROPESales Administration: +32-2-712-65 00Technical Assistance: +32-2-712-65 42U.S.A. OR CANADASales: 1-800-366-3891 Extension 73000Technical Assistance: 1-800-366-3891 Extension 73475ELSEWHERESales Administration: +1-952-938-8080Technical Assistance: +1-952-917-347513944-GWWW.ADC.COMtechnical@adc.comADC TELECOMMUNICATIONS, INCPO BOX 1101,MINNEAPOLIS, MN 55440-1101, USAU.S.A.U.S.A.ADC EUROPEAN CUSTOMER SERVICE, INCBELGICASTRAAT 2,1930 ZAVENTEM, BRUSSELS, BELGIUMPRODUCT INFORMATION AND TECHNICAL ASSISTANCE:WRITE:PHONE:SYSTEM INTEGRATION DIVISION (SID)+1-952-294-3600Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC furtherdisclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer ofliability applies to all products, publications and services during and after the warranty period. This publication may bevarified at any time by contacting ADC's Technical Assistance Center. ©2002, ADC Telecommunications, Inc.All Rights ReservedPrinted in U.S.A.
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