Andrew MDL2400BDR Base Station Data Radio User Manual Operation and Maintenance Line Amp

Andrew Corporation Base Station Data Radio Operation and Maintenance Line Amp

Contents

Operation and Maintenance Line Amp

OPERATION AND MAINTENANCE MANUALFor theMODEL 2400DISTRIBUTION LINE AMPLIFIERMANUAL NO. 385700-4006REVISION 6The information set forth in this document and all rights in and to inventionsdisclosed herein, and patents which might be granted thereon disclosing,employing or covering the materials, methods, techniques or apparatusdescribed herein are the exclusive property of Andrew Corporation.This document is an operation and maintenance manual. No disclosure orreproduction of the information or drawings shall be made of any otherpurpose without the prior written consent of Andrew. Use of the informationcontained herein to fabricate or assemble any item in whole or in part isexpressly prohibited.2601 Telecom Parkway, Richardson, Texas 75082-3521TEL (972) 952 9700 FAX (972) 952-0000
385700-4006-006 SAFETY SUMMARYDocument use is restricted to that described on cover ASAFETY SUMMARYHigh voltage is used in the operation ofthis equipment. Death on contact mayresult, if personnel fail to observe thefollowing safety precautions:• Do not be misled by the term “Low Voltage.” Potentials as low as 50 Volts may causedeath under adverse conditions.• Do not crush, puncture, disassemble or otherwise mutilate batteries. Leaking batteriescan cause serious damage to equipment and injury to personnel.• Do not remove covers or access plates on the equipment, unless you are authorized to do so.• Do not work on electronic equipment unless there is another person nearby who is familiarwith the operation of the equipment and is trained in administering first aid.• Whenever possible, disconnect the equipment from the power source before beginningmaintenance.• To prevent electrical shock or damage to the equipment, do not operate it until youthoroughly understand the operation and function of all controls, indicators, andconnectors.• Turn off all power to the equipment before replacing any fuses.FIRST AIDIn case of electrical shock:• Do not try to pull or grab the individual.• If possible, turn off the electrical power.• If you cannot turn off the electrical power, pull, push, or lift the person to safety using a drywooden pole, a dry rope, or some other insulating material.• Send for help as soon as possible.• After the injured person is no longer in contact with the source of electrical shock, movethe person a short distance away and immediately administer first aid and artificialresuscitation as required.
385700-4006-006 LIST OF ABBREVIATIONS AND ACRONYMSDocument use is restricted to that described on cover BThe Distribution Line Amplifier is an unlicensed device operatingunder the conditions of FCC part 15 regulations. This equipmentis intended to be installed and operated by professional parties.It is the responsibility of those parties to insure that theequipment is operated in compliance with the applicable FCCpart 15 specifications.LIST OF ABBREVIATIONS AND ACRONYMSAll abbreviations/acronyms used in thismanual, other than those listed on thispage, are used per MIL-STD-12D.BDR Base Data RadioUSER Communications-Based Train ControlDLA Distribution Line AmplifierESDS Electrostatic Discharge SensitiveFWD ForwardLRU Line Replaceable UnitMDR Mobile Data RadioPC Personal ComputerRCS Radio Communication SubsystemRF Radio FrequencyRVS ReverseSSR Spread Spectrum RadioNOTEWARNING
385700-4006-006 LIST OF REFERENCE DOCUMENTSDocument use is restricted to that described on cover CLIST OF REFERENCE DOCUMENTSAndrew Catalog 37 (or latest version)Drawings:Assembly, Line Amplifier 385700-4000
385700-4006-006 TABLE OF CONTENTSDocument use is restricted to that described on cover iTABLE OF CONTENTSCHAPTER 1............................................................................................................................................ 1-41.1 GENERAL MANUAL INFORMATION........................................................................................ 1-41.2 PREPARATION FOR STORAGE OR SHIPMENT.................................................................... 1-41.2.1 Storage.............................................................................................................................. 1-41.2.2 Shipment ........................................................................................................................... 1-41.3 DESCRIPTION OF EQUIPMENT.............................................................................................. 1-51.3.1 Type of Equipment ............................................................................................................ 1-51.3.2 Purpose of the Equipment................................................................................................. 1-51.4 LOCATIONS AND DESCRIPTIONS OF MAJOR COMPONENTS........................................... 1-61.4.1 Distribution Line Amplifier Principles of Operation ............................................................ 1-61.4.2 Distribution Line Amplifier Major Components.................................................................. 1-91.5 EQUIPMENT CHARACTERISTICS......................................................................................... 1-101.5.1 Power and Utility Requirements ...................................................................................... 1-101.5.2 Environmental Information .............................................................................................. 1-10CHAPTER 2............................................................................................................................................ 2-12.1 INSTALLING THE DISTRIBUTION LINE AMPLIFIER EQUIPMENT........................................ 2-12.1.1 Unpacking and Inspection................................................................................................. 2-12.1.2 Proper Installation of Units ................................................................................................ 2-12.2 INTERCONNECTIONS.............................................................................................................. 2-12.2.1 Forward Direction Configuration Interconnection.............................................................. 2-12.2.2 Reverse Direction Configuration Interconnection.............................................................. 2-22.3 CABLE AND GROUND REQUIREMENTS................................................................................ 2-22.3.1 Mating Connector Pin-outs................................................................................................ 2-52.4 DISTRIBUTION LINE AMPLIFIER COMPONENT JACK LOCATIONS.................................... 2-72.5 PREPARATION FOR USE ........................................................................................................ 2-82.5.1 Distribution Line Amplifier Setup ....................................................................................... 2-82.5.2 Distribution Line Amplifier Initial Operational Adjustments................................................ 2-92.5.2.1 Input AC Power............................................................................................................. 2-92.5.2.2 Power Amplifier (PA) Channel (Channel 1) ................................................................. 2-92.5.2.2.1 PA Equipment Setup............................................................................................ 2-92.5.2.2.2 PA Input Alarm Adjustment................................................................................ 2-102.5.2.2.3 PA Output Adjustment........................................................................................ 2-112.5.2.2.4 PA Output Alarm Adjustment ............................................................................. 2-112.5.2.3 Low Noise Amplifier (LNA) Channel (Channel 2)........................................................ 2-122.5.2.3.1 LNA Adjustment Equipment Setup..................................................................... 2-122.5.2.3.2 LNA Output Adjustment ..................................................................................... 2-132.5.2.3.3 LNA Output Alarm Adjustment........................................................................... 2-142.5.3 Operational Check-Out ................................................................................................... 2-142.5.3.1 Forward PA Channel Verification................................................................................ 2-142.5.3.1.1 PA Output Level Verification .............................................................................. 2-142.5.3.1.2 PA Input Signal Alarm ........................................................................................ 2-152.5.3.1.3 PA Output Signal Alarm ..................................................................................... 2-152.5.3.2 Forward LNA Channel Verification.............................................................................. 2-162.5.3.2.1 LNA Output Level Verification ............................................................................ 2-162.5.3.2.2 LNA Output Signal Alarm ................................................................................... 2-162.5.3.3 Reverse PA Channel Verification................................................................................ 2-162.5.3.3.1 PA Output Level Verification .............................................................................. 2-162.5.3.3.2 PA Input Signal Alarm ........................................................................................ 2-172.5.3.3.3 PA Output Signal Alarm ..................................................................................... 2-172.5.3.4 Reverse LNA Channel Verification ............................................................................. 2-172.5.3.4.1 LNA Output Level Verification ............................................................................ 2-172.5.3.4.2 LNA Output Signal Alarm ................................................................................... 2-17
385700-4006-006 TABLE OF CONTENTSDocument use is restricted to that described on cover iiCHAPTER 3............................................................................................................................................ 3-13.1 WIRING PROTECTION AND GROUNDING............................................................................. 3-13.2 STARTUP AND SHUTDOWN PRODECURES......................................................................... 3-23.2.1 DLA Startup....................................................................................................................... 3-23.2.2 Normal Operation.............................................................................................................. 3-23.2.3 Shutdown .......................................................................................................................... 3-2CHAPTER 4............................................................................................................................................ 4-14.1 TROUBLESHOOTING............................................................................................................... 4-14.2 CORRECTIVE MAINTENANCE ................................................................................................ 4-24.2.1 Remove and Replace DLA................................................................................................ 4-24.3 TEST PROCEDURES ............................................................................................................... 4-44.3.1 Inoperative Distribution Line Amplifier............................................................................... 4-44.3.1.1 Input Power Verification ................................................................................................ 4-44.3.1.2 RADIAX Alarm Asserted ............................................................................................. 4-54.3.1.3 Amplifier Alarm Asserted .............................................................................................. 4-54.3.1.3.1 Loss of PA Input Signal........................................................................................ 4-54.3.1.3.2 PA Module Failure................................................................................................ 4-54.3.1.3.3 Loss of Pilot Tone Signal...................................................................................... 4-64.3.1.3.4 LNA Module Failure.............................................................................................. 4-6CHAPTER 5............................................................................................................................................ 5-15.1 PARTS LIST .............................................................................................................................. 5-1CHAPTER 6............................................................................................................................................ 6-1CHAPTER 7............................................................................................................................................ 7-1
385700-4006-006 TABLE OF CONTENTSDocument use is restricted to that described on cover iiiLIST OF FIGURESFigure 1-1 Distribution Line Amplifier (4 port).......................................................................1-6Figure 1-2 DLA Block Diagram ............................................................................................1-8Figure 1-3 DLA Internal View................................................................................................1-9Figure 2-1 DLA Forward Direction Interconnect Diagram.....................................................2-3Figure 2-2 DLA Forward Direction Interconnect Diagram......................................................2-4Figure 2-3 DLA Input VAC Pin-outs ......................................................................................2-5Figure 2-4 DLA ALARM/CONTROL Port Pin-outs................................................................2-6Figure 2-5 DLA Assembly Jack Locations............................................................................2-7Figure 2-6 PA Output Level Test Setup ............................................................................... 2-9Figure 2-7 PA Module Outline............................................................................................ 2-10Figure 2-8 LNA Module Outline.......................................................................................... 2-12Figure 2-9 LNA Output Level Test Set Up.......................................................................... 2-13Figure 3-1 DLA Connector Panel Layout..............................................................................3-1Figure 4-1 Remove and Replace DLA..................................................................................4-3Figure 6-1 DLA Mechanical Outline ..................................................................................... 6-1LIST OF TABLESTable 1-1 – DLA Part Numbers............................................................................................. 1-5Table 1-2 Distribution Line Amplifier Specifications............................................................ 1-11Table 2-1 – Forward Direction RF Port Functions ................................................................. 2-3Table 2-2 Reverse Direction RF Port Functions....................................................................2-4Table 4-1 DLA Fault Isolation...............................................................................................4-1Table 4-2 Test Equipment.................................................................................................... 4-4Table 5-1 Vendors ...............................................................................................................5-1Table 5-2 Parts List..............................................................................................................5-2
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-4CHAPTER 1 INTRODUCTION1.1 GENERAL MANUAL INFORMATIONThis manual contains instructions for the operation, maintenance, and support of theDistribution Line Amplifier (DLA) assembly. This manual describes the amplifier assembly indetail. It provides the necessary information for qualified technical personnel to install, repair,and maintain the Distribution Line Amplifier to the line replaceable unit (LRU).This manual is divided into seven chapters, which consist of sections to describe theinformation or procedures in detail. The five chapters are as follows:• Chapter 1 outlines the contents of this manual and provides a basic equipmentdescription of the Distribution Line Amplifier.• Chapter 2 provides preparation for use and installation information.• Chapter 3 provides operating procedures for the equipment.• Chapter 4 provides preventive and corrective maintenance of the Distribution LineAmplifier assembly.• Chapter 5 contains a vendor list and parts list for procurement of replacementparts.• Chapter 6 provides mechanical outline information• Chapter 7 contains a schematic of a test fixture for the Alarm/Control interface.1.2 PREPARATION FOR STORAGE OR SHIPMENTThe following paragraphs describe guidelines for long term storage and the shipment of theequipment.1.2.1 StorageBefore storage, wrap the equipment in static shielding bubble wrap. Bubble wrap protectsinternal electrostatic discharge sensitive (ESDS) assemblies, external panels, and connectors.Place wrapped equipment in the original shipping containers and seal. Store in a cool dryplace, away from the elements.1.2.2 ShipmentShip equipment in the original shipping containers or in a container that provides sufficientprotection for ESDS equipment. Pack the equipment in a manner that provides protection forall external switches and mountings, because these items are most vulnerable to damageduring shipment.
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-51.3 DESCRIPTION OF EQUIPMENTThe Radio Communications Network consists of Base and Mobile Radio CommunicationSystems (RCS) and a Wayside Antenna System. The Distribution Line Amplifier (DLA) is partof the distributed Wayside Antenna System based on leaky-feeder cable RADIAX®. DLA’s areused to compensate for attenuation losses in the cable by providing bi-directional amplificationof signals. The DLA also includes a direction control signal and status signals to monitoramplifier operation.1.3.1 Type of EquipmentThe DLA is a FCC approved bi-directional amplifier that is used with spread spectrumtransceivers that operate in the ISM 2400-2483.5 MHz frequency band. The 4 versions of theDLA are shown in Table 1-1. The models differ in the number of RF ports and the type ofcontrol interface.Part Number Description385700-4000-001 4 port amplifier with LONWorks™ Interface385700-4000-002 4 port amplifier with dry contact Interface385700-4000-003 2 port amplifier with LONWorks™ Interface385700-4000-004 2 port amplifier with dry contact InterfaceTable 1-1 – DLA Part Numbers1.3.2 Purpose of the EquipmentThe Distribution Line Amplifier provides selective frequency range amplification of both aforward (downlink) and reverse (uplink) direction signals in RADIAX® cable. Forward isdefined as the direction of RF energy from the BDR at the wayside to the MDR. Reversedirection is defined as the direction of RF energy from the MDR to the BDR. The signals thatappear on the line amplifier RF ports are determined by the USER controlled direction signal.
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-61.4 LOCATIONS AND DESCRIPTIONS OF MAJOR COMPONENTSRefer to Figure 1-1 Distribution Line Amplifier (4 port) for a view of the external connectionsof the 4 port DLA. The 2 port DLA does not include J5 or J6. The mechanical outline of theDLA is given in CHAPTER 6. The following paragraphs contain the description of theDistribution Line Amplifier.Figure 1-1 Distribution Line Amplifier (4 port)1.4.1 Distribution Line Amplifier Principles of OperationThe bi-directional Distribution Line Amplifier operates within two sub-regions of the 2400 –2483.5 MHz ISM band. It filters and amplifies at the BDR center frequency of 2416.64 MHz.in one direction (FWD) and at the MDR center frequency of 2467.86 MHz in another direction(RVS).The RF signal at each amplifier is routed through a diplexer (filter) to divide the signal into twopaths: forward and reverse. The DLA has a direction control switch which changes the signalpath to the opposite direction upon the command from the user control equipment networkdata interface via the alarm and control interface board. The internal status of the DLA ismonitored by the Amplifier Alarm Detectors. The status signals are sent to the USER controlequipment network data interface via the alarm and control interface.The BDR path, also referred to as the PA channel or channel 1, contains a power amplifier.The maximum PA output of the 4 port DLA is < +27 dBm per output port. The PA output portof the 2 port DLA is < +30 dBm. The PA channel maintains a constant output power over auser adjustable range. See Table 1-2 Distribution Line Amplifier Specifications for the inputrange over which the output power is adjustable. The PA channel also contains an input
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-7power level alarm as well as an output power alarm. The alarm levels are user adjustable.The MDR path is also referred to as the LNA channel or channel 2. The LNA channel isreferenced to a pilot tone within the Distribution Line Amplifier. The pilot tone is used (1) toset the gain of the LNA channel and (2) to provide a method of detecting a faulty LNA module.The LNA channel gain is user adjustable. The maximum LNA gain is +27 dB for the 4 portDLA per output port and +30 dB for the 2 port DLA. See Table 1-2 Distribution Line AmplifierSpecifications for the range over which the gain is adjustable. Under normal operation, theinput signal is expected to be lower (nominally 10 dB) than the pilot tone.The PA channel input alarm is used to detect a loss of input signal due to cable breakage, etc.The PA channel output alarm and the LNA channel output alarm are combined to indicate anamplifier failure.Refer to Figure 1-2 DLA Block Diagram, for bi-directional amplifier major componentidentification.
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-8Figure 1-2 DLA Block Diagram-10 dBmRadiaxAlarm & ControlInterface Board 24V LightningProtectorsRF LightningProtectionTransferRelay RF LightningProtection RadiaxDiplexerDirection StatusDirection ControlPARadiax AlarmDetector PA AlarmDetector+12 VDCLNALNA AlarmDetector Pilot ToneGenerator+12 VDC DiplexerAlarm & ControlConnectionsAC-DCPower SupplyACLightningProtection87-265 VAC+12 VDCUSER Control Equipment
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-91.4.2 Distribution Line Amplifier Major ComponentsRefer to Figure 1-3 DLA Internal View for locations of major DLA components. The test pointlocations, Pilot Tone Output J3 on the Pilot Tone Board and Alarm and Control InterfaceBoard Test Points J4, shown inFigure 1-3 are used for initial DLA adjustments and referenced later in this manual in section2.5.Figure 1-3 DLA Internal ViewRefer to section 2.5.1, Distribution Line Amplifier Setup, for PA and LNA outline views andcontrols.Lightning Protection ModuleJ1J8J5J2J9J7J6J3 J4J2J1
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-101.5 EQUIPMENT CHARACTERISTICSRefer to Table 1-2 Distribution Line Amplifier Specifications. The table contains thespecifications for the DLA. The table includes characteristics and specifications in threecategories: technical, environmental, and physical.1.5.1 Power and Utility RequirementsThe DLA operates across an AC input range of 87 to 265 VAC. No user adjustment isrequired.1.5.2 Environmental InformationThe DLA assembly is designed for above and below ground environments. Refer to Table 1-2Distribution Line Amplifier Specifications, for more detailed information.The DLA is housed in a NEMA4X enclosure. It is intended for indoor or outdoor use toprovide a degree of protection against corrosion, windblown dust and rain, splashing water,and hose-direct water; undamaged by the formation of ice on the enclosure. The NEMA4Xenclosure is manufactured from 16 gauge Type 304 stainless steel.
385700-4006-006 INTRODUCTIONDocument use is restricted to that described on cover 1-11Electrical SpecificationsChannels 2Channel 1, MHz 2416.64 ± 13.5 MHzChannel 2, MHz 2467.86 ± 13.5 MHzInput and Output Impedance, ohms 50Channel 1 (PA channel)input power -15 dBm to +5 dBmoutput power, adjustable +15 to +30 dBm (2 port amplifier)+12 to +27 dBm (4 port amplifier)input signal alarm, adjustable -10 dBm nominaloutput signal alarm, adjustable +20 dBm nominalChannel 2 (LNA channel)input power -25 dBm maximumoutput power +0 dBm maximum (2 port amplifier)-3 dBm maximum (4 port amplifier)output gain, adjustable 15 to 30 dBoutput signal alarm 10 dB below the pilot tone levelGain, dB ≥ 30 (at maximum gain)Noise Figure, dBChannel 1 ≤ 8Channel 2 ≤ 6Environment SpecificationsOperating Temperature, °C -40 to +70Storage Temperature, °C -55 to +85Physical SpecificationsPower Requirements 87-265 VAC47-63 HzPower Consumption, watts 50Dimensions, in (mm) 20 (508) x 16 (406) x 7 (178)excluding mounting feetWeight, lbs. (kg) 43 (19.5)Table 1-2 Distribution Line Amplifier Specifications
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-1CHAPTER 2 INSTALLATION2.1 INSTALLING THE DISTRIBUTION LINE AMPLIFIER EQUIPMENTThis chapter provides information to install the Distribution Line Amplifier (DLA) and to preparethe equipment for use.2.1.1 Unpacking and InspectionUnpacking the Distribution Line Amplifier does not require special procedures. Use normalshop procedures to unpack the equipment.Carefully inspect the shipping containers and equipment. If the containers show damage,inspect the equipment in those containers with extra care. Do not open containers withextreme damage.Check equipment for bent frames, protrusions, and dents. Pay close attention to externalbrackets, controls and connectors, because they are especially susceptible to damage duringshipment.If you find damage to the equipment, notify Andrew Corporation’s Customer Service Center at:• 1-800-255-1479 (Inside the USA)• 708-873-2307 (Outside the USA)2.1.2 Proper Installation of UnitsThe amplifier has a weatherproof NEMA4X enclosure. The layout is optimized for verticalmounting of the amplifier with the cables connected at the bottom of the amplifier. Theenclosure is accompanied with hanger brackets that are used to mount the amplifier. Thetype of fasteners will depend on the construction of the mounting surface. Typicalconstruction in a concrete tunnel would be to use concrete anchors embedded in concrete.Once DLA is mounted, the power connections and RF connections can be made next.2.2 INTERCONNECTIONSRefer to Figure 2-1 DLA Forward Direction Interconnect Diagram, for a block diagram ofwiring runs and connector designations. The following paragraphs describe theinterconnections directly related to the Distribution Line Amplifier.Before applying power, verify that theinput/output cables are securelyconnected to the DLA Input/Output J3 andJ4 ports. Failure to observe thesewarnings will damage the equipment.2.2.1 Forward Direction Configuration InterconnectionWARNING
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-2In normal usage, the RF connections to the Distribution Line Amplifier are made with non-radiating coaxial cable that is attached to the main radiating coaxial cable RADIAX®. The non-radiating RF cable is type HELIAX® LDF4-50A (or equivalent) with N male type connectors.In the forward configuration, connect the HELIAX® coaxial cable coming from the direction ofBDR or the preceding DLA in a cascaded configuration to the Distribution Line Amplifier atNORM PA IN/LNA OUT (J4) port on the connector panel of the unit. Connect the HELIAXcoaxial cable coming from the direction of the succeeding DLA in a cascaded configuration atthe DLA NORM PA OUT1/LNA IN (J3) port. See Figure 2-1 DLA Forward DirectionInterconnect Diagram for a typical 4 port configuration. For 2 port configurations, J5 and J6are not connected. Refer to Andrew Catalog, -- HELIAX® Coaxial Cable – for cable andconnector information.Connect a nominal 120 VAC power source to the DLA connector panel POWER IN (J1) port.Refer to Figure 2-3 DLA Input VAC Pin-outs.The ALARM/CONTROL (J2) connector is connected via cable to the USER control equipmentnetwork data interface. The data interface may be represented by either LONWORKS® typeconnection or by twisted pair cable connection. For the dry contacts refer to Figure 2-4 DLAALARM/CONTROL Port Pin-outs. The ALARM/CONTROL interface includes a signal thatcontrols the direction of the line amplifier. In normal usage the direction control is set toFORWARD.2.2.2 Reverse Direction Configuration InterconnectionIn normal usage, the direction of the amplifier is reversed by controlling the amplifier from theALARM/CONTROL interface. The signals are connected to the line amplifier as described inthe previous section. Selecting the reverse direction reverses the direction of the signalswithin the line amplifier as well as the signals that appear on J3 and J4 of the line amplifier.2.3 CABLE AND GROUND REQUIREMENTSThe following paragraphs contain the requirements for constructing the interconnect cablingbetween the DLA vendor supplied equipment.The chassis of the DLA must be bonded to earth with 6-guage solid conductor. See Figure1-1. Connection to the DLA is made at ground lug provided at the connector panel of theDLA.The RF coaxial cables that are connected to the main radiating cable under normal conditionsmust support potential bends in the path from the main radiating cable to the DLA plate. Lossthrough this cable must be less than 2 dB.For the ALARM/CONTROL interface (direction and amplifier status signals), construct signalcabling using 16 gauge shielded cabling.All signal cables shall be shielded for EMI reduction.
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-3Figure 2-1 DLA Forward Direction Interconnect DiagramRF Port Frequency Input/Output 4 Port/2 PortJ3 – LNA In 2467.84 MHz ± 13.5 MHz I YJ3 – Norm PA Out1 2416.64 MHz ± 13.5 MHz O YJ4 – Norm PA In 2416.64 MHz ± 13.5 MHz I YJ4 – LNA Out 2467.84 MHz ± 13.5 MHz O YJ5 – Norm PA Out2 2416.64 MHz ± 13.5 MHz 0 4 Port onlyJ6 – Norm Det In 2416.64 MHz ± 13.5 MHz I 4 Port onlyTable 2-1 – Forward Direction RF Port FunctionsFORWARD CONFIGURATION : DIRECTION CONTROL = NORMALBDR 1 RADIAX®RADIAX®HELIAX®USER ControlEquipmentDLA DLAVAC PowerBDR 2BDR 1ZONE BDR 2ZONEHELIAX®HELIAX®RADIAX®RADIAX®NORM PA OUT1LNA INJ3NORM PA INLNA OUTJ4POWER INJ1ALARM/CONTROLJ2 NORM PAOUT2J5NORM DET INJ6RADIAX®RADIAX®NORM PA OUT1LNA INJ3NORM PA INLNA OUTJ4POWER INJ1ALARM/CONTROLJ2 NORM PAOUT2J5NORM DET INJ6
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-4Figure 2-2 DLA Forward Direction Interconnect DiagramRF Port Frequency Input/Output 4 Port/2 PortJ3 – LNA In 2467.84 MHz ± 13.5 MHz O YJ3 – Norm PA Out1 2416.64 MHz ± 13.5 MHz I YJ4 – Norm PA In 2416.64 MHz ± 13.5 MHz O YJ4 – LNA Out 2467.84 MHz ± 13.5 MHz I YJ5 – Norm PA Out2 2416.64 MHz ± 13.5 MHz I 4 Port onlyJ6 – Norm Det In 2416.64 MHz ± 13.5 MHz O 4 Port onlyTable 2-2 Reverse Direction RF Port FunctionsBDR 1ZONEBDR 2ZONEBDR 1 RADIAX®RADIAX®HELIAX®USER ControlEquipmentDLA DLAVAC PowerBDR 2HELIAX®HELIAX®RADIAX®RADIAX®NORM PA OUT1LNA INJ3NORM PA INLNA OUTJ4POWER INJ1ALARM/CONTROLJ2 NORM PAOUT2J5NORM DET INJ6RADIAX®RADIAX®NORM PA OUT1LNA INJ3NORM PA INLNA OUTJ4POWER INJ1ALARM/CONTROLJ2 NORM PAOUT2J5NORM DET INJ6
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-52.3.1 Connector Pin-outsRefer to Figures Figure 2-3 and Figure 2-4 for the connector pin-out information for theDistribution Line Amplifier ports.Figure 2-3 DLA Input VAC Pin-outs shows the pin assignments for the Distribution LineAmplifier POWER IN connector.Figure 2-3 DLA Input VAC Pin-outsThe DLA Power Connector is a MIL-C-26482, Series 2 connector. The connector isMS3474W14-4P or equivalent. Mating connectors are MS3475W14-4S, PV75W14-4S,or equivalent.
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-6Figure 2-4 DLA ALARM/CONTROL Port Pin-outs, shows the pin assignments for theDistribution Line Amplifier ALARM/CONTROL connector.Figure 2-4 DLA ALARM/CONTROL Port Pin-outsThe Alarm/Control connector is a MIL-C-26482, Series 1 connector. The part is MS3124E20-16P, KPSE07E20-16P, or equivalent. The mating connectors are MS3126F20-16S,KPSE06F20-16S, or equivalent. These are crimp connectors with a grommet seal and strainrelief. Other options are available including a right angle plug assembly(KPSE08F20-16S)and solder connections.
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-72.4 DISTRIBUTION LINE AMPLIFIER COMPONENT JACK LOCATIONSThe following paragraphs describe the purpose and location of the jacks for the DistributionLine Amplifier. Refer to Figure 2-5 DLA Assembly Jack Locations. The amplifier connectorpanel contains one data jack, ALARM/CONTROL (J2). The DLA exchanges status andcontrol signals with USER control equipment over ALARM/CONTROL (J2) port.The NORM PA OUT1/LNA IN (J3) port and NORM PA IN/LNA OUT (J4) are connected toRADIAX® cable via HELIAX® coaxial cable. The signal (downlink) coming from the BDR isrouted through the section of RADIAX cable to the NORM PA IN/LNA OUT (J4) port of theDLA. The signal (uplink) coming from the succeeding DLA NORM PA OUT1/LNA IN RF FWDOUT/RVS IN (J3) port is routed through the section of RADIAX cable to the next DLA incascade.Port POWER IN (J1) connects the DLA to the AC power source.In the normal direction, NORM PA OUT2 ((J5), if installed, is used with a non cascadedsection of RADIAX® cable.In the normal direction, NORM DET IN (J6), if installed, is used to terminate a section ofRADIAX® cable.Figure 2-5 DLA Assembly Jack Locations
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-82.5 PREPARATION FOR USEBefore applying power to the DistributionLine Amplifier, securely connect the RFports to 50-ohm terminations. Failure toobserve these cautions can damage theequipment.2.5.1 Distribution Line Amplifier SetupA Distribution Line Amplifier is part of a wayside antenna system; a RADIAX based signaldistribution system. The amplifier provides signal gain to offset the signal loss of the system.The signal loss is based on the length and type of cable used. The Distribution Line Amplifierincludes gain adjustments for both channels as well as adjustable thresholds for the statussignals.Channel 1, whose center frequency is 2416.64 MHz, is referred to as the Power Amplifier (PA)or downlink channel. Refer Figure 1-3 DLA Internal View for the location of the PA module(part number 385700-2012). The output of this channel is a nominal +30 dBm for a two portDLA. The output of a 4 port DLA is a nominal +27 dBm per PA output port. For the downlinkchannel, the signal input level as well as the output level are monitored. R1, R2, and R3 areadjustment points on the PA module. See Figure 2-7 PA Module Outline for more details.Channel 2, whose center frequency is 2467.84 MHz, is referred to as the Low Noise Amplifier(LNA) or uplink channel. Refer to Figure 1-3 DLA Internal View, for for the location of the LNAmodule (part number 385700-2011). A pilot tone module within the Distribution Line Amplifierserves as a constant input signal for the LNA channel. The output level of the pilot tone ismonitored within the LNA module. No user adjustment of this signal is required. Because ofthe diplexers within the DLA the pilot tone may not be observable at the external DLA coaxialconnectors. The input signal range of the LNA channel is approximately -30 dBm to < -100dBm. R1 and R2 are adjustment points on the LNA module. See Figure 2-8 LNA ModuleOutline for more details.A configuration sheet is included with the DLA that specifies the adjustable settings at the timeof shipping the equipment.The direction of the DLA must be set by the user for proper operation. The amplifier directionstatus is indeterminate after powering up the unit. This manual assumes that either the user’ssystem control interface is available or a test box similar to an example given at the end of thismanual is used.CAUTION
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-92.5.2 Distribution Line Amplifier Initial Operational Adjustments2.5.2.1 Input AC PowerThe Distribution Line Amplifier AC power supply automatically senses the input AC voltage.The DLA input voltage range is 87-265 VAC. Refer to Table 1-2 Distribution Line AmplifierSpecifications.2.5.2.2 Power Amplifier (PA) Channel (Channel 1)The nominal output level of the PA channel, as set at the time of manufacturing, is set to +27dBm (4 port) or +30 dBm (2 port). The output alarm level is set for a threshold of 10 dB belowthe expected output level. The expected input is 0 dBm. The input signal level threshold isset for 10 dB below the input level. If other levels are desired, the customer should contactAndrew with additional information when ordering the equipment. Refer to Figure 2-7 PAModule Outline, for PA adjustment points locations.2.5.2.2.1 PA Equipment SetupThe equipment required to adjust the PA output level is:• Signal Generator• Power Meter or Spectrum Analyzer• Digital Volt Meter• small Blade Screwdriver• ≥ 10 dB power attenuator• direction control signalRefer to Table 4-2 Test Equipment for a listing of suggested equipment. Refer to Figure 2-6PA Output Level Test Setup, for test equipment setup.Figure 2-6 PA Output Level Test SetupThe signal generator should be set for an output frequency of 2416.64 MHz with an outputlevel of 0 dBm.The power meter, if used, should be configured to measure signals from 0 dBm to +40 dBm.This can be done by either using the appropriate power sensor head(s) or by using powerattenuators.≥ 10 dBpowerattenuatorSignalGeneratorDistribution LineAmplifier AssemblyJ4 J3Power MeterorSpectrumAnalyzerJ2Direction Control = Forward
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-10The spectrum analyzer, if used, should be configured as follows:Center Frequency 2416.64 MHzSpan 2 MHzRBW 30 KHzVBW 3 HzRef. Level as requiredAttach a ≥ 10 dB, 2 watt or greater, power attenuator to the spectrum analyzer RF input.The direction control signal characteristics required will depend on the interface optioninstalled. The direction must be set to the NORMAL state.Figure 2-7 PA Module Outline2.5.2.2.2 PA Input Alarm AdjustmentSet the signal generator output to RF ON. Adjust the output level of the generator to 10 dBless than the expected input level. If this level exceeds the range of the input detector, thedetector should be set to its minimum detectable level.R1 = Input Threshold SetR2 = Output Level SetR3 = Output Threshold Set
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-11Attach a voltmeter to J4-3 on the Alarm I/O board. (PA input alarm test point). TP1 or TP2can be used as the ground connection. Refer to Figure 1-3 DLA Internal View for the locationof the Alarm and Control Interface Board test points. Standard 0.080 test probes should beused for test points.Adjust R1 (Input Alarm Set) on the PA module for TP3 to go to the high condition (≥ 3 VDC),low (≤1 VDC), and then high again. Reduce the signal generator level by 2 dB and verify thatthe alarm is asserted. Increase the signal generator level by 4 dB and verify that the alarm isnegated. If needed, readjust R1 and repeat this process as necessary.2.5.2.2.3 PA Output AdjustmentSet the signal generator output to RF ON at the nominal input level (i.e. 0 dBm). Themaximum input level is +5 dBm. Adjust R2 (Output Power Set) on the PA module to obtainthe desired amplifier output level. Note that the actual level measured will depend on theattenuation used on the spectrum analyzer or power meter.2.5.2.2.4 PA Output Alarm AdjustmentAttach a voltmeter to J4-1 on the Alarm I/O relay board. (P.A. output Alarm test point). TP1 orTP2 can be used as the ground connection.Adjust the signal generator level as necessary to obtain 10 dB below the desired output poweras observed at J3 (FWD OUT/RVS IN) port. If this level exceeds the range of the outputdetector, the detector should be set to its minimum detectable level.Adjust R3 (output Alarm Set) on PA for high condition (> 3 VDC), low (< 1.0 VDC), and thenhigh again. Reduce the signal generator level until the alarm is asserted. Verify that the outputlevel is ± 2 dB of the desired level. If needed, readjust R3 and repeat this process asnecessary.
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-122.5.2.3 Low Noise Amplifier (LNA) Channel (Channel 2)The nominal gain of the LNA channel, as set at the time of manufacturing, is set to 30 dB.The output alarm level is set for a threshold nominally 10 dB below the expected output pilotlevel. The expected signal input range is -40 to -90 dBm. If other settings are desired, thecustomer should contact Andrew with additional information when ordering the equipment.Refer to Figure 2-8 LNA Module Outline, for LNA adjustment points locations.Figure 2-8 LNA Module Outline2.5.2.3.1 LNA Adjustment Equipment SetupThe equipment required to adjust the LNA output level is:• signal generator• power meter or spectrum analyzer• digital volt meter• small Blade screwdriver• ≥ 10 dB power attenuator• 50 ohm SMA termination• direction control interfaceSee Table 4-2 Test Equipment, for a listing of suggested equipment. Refer to Figure 2-9LNA Output Level Test Set Up, for test equipment setup.The signal generator should be set for an output frequency of 2467.86 MHz with an outputlevel of -40 dBm.The power meter, if used, should be configured to measure signals from -70 dBm to 0 dBm.This can be done by either using the appropriate power sensor head(s) or by usingattenuators.The spectrum analyzer, if used, should be configured as follows:
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-13Center Frequency 2467 MHzSpan 2 MHzRBW 30 KHzVBW 3 HzRef. Level as requiredAttach a 10 dB, 2 watt or greater, power attenuator to the spectrum analyzer RF input.The direction control signal characteristics required will depend on the interface optioninstalled. The direction must be set to the NORMAL state.Figure 2-9 LNA Output Level Test Set Up2.5.2.3.2 LNA Output AdjustmentDisconnect the pilot tone signal from the LNA module J5 Aux RF IN port. Terminate the pilottone input port with a 50 ohm termination.Connect the signal generator to J3 of the DLA as shown in Figure 2-9 LNA Output Level TestSet Up.Adjust R1 so that the signal at J3 at 2467 MHz is the desired level ±0.5 dB. The maximumoutput value for the LNA channel is +5 dBm.With the LNA output set, go to the next step to set the LNA output alarm adjustment.SignalGeneratorDistribution LineAmplifier AssemblyJ3 J4Power MeterorSpectrumAnalyzer≥ 10 dBpowerattenuatorDirection Control = Forward
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-142.5.2.3.3 LNA Output Alarm AdjustmentThe previous step must be completedbefore adjusting the output alarm.Attach a voltmeter to J4-2 (LNA output Alarm test point) on the Alarm I/O board. TP1 or TP2can be used as the ground connection.Adjust R2 on the LNA until the voltage on J4-2 goes high (≥ 3 VDC), low (≤ 1.0 VDC), andthen high again.Decrease the signal generator output as required to obtain a 10 dB drop in output level, fromthe level set in the previous section, of the LNA channel.Adjust R2 on the LNA until the voltage on TP2 goes low (≤ 1.0 VDC), high (≥ 3 VDC), andthen low (≤ 1.0 VDC) again. Increase the signal generator input by 10 dB and verify that theoutput alarm signal at TP2 is high (≥ 3 VDC). Decrease the signal generator level by 10 dBand verify that the output alarm signal at TP2 is low (≤ 1.0 VDC). Readjust R2 and repeat asnecessary.Remove the SMA termination from the LNA module J5 Aux RF IN port and reattach the pilottone signal cable to the LNA module J5 Aux RF IN port.2.5.3 Operational Check-OutAttach a 2 watt or greater 10 dB power attenuator to the J3 and J4 ports of the DLA. From theconfiguration documentation sent with the amplifier or using on site documentation thatreflects any changes from the factory settings, determine the output level settings of the PAand LNA channels, the PA input alarm level, and the PA and LNA output alarm levels.2.5.3.1 Forward PA Channel VerificationSet the DLA direction to the forward direction.2.5.3.1.1 PA Output Level VerificationAttach either a signal generator (frequency = 2417 MHz) or a BDR to J4 (FWD IN/RVS OUT)port of the Distribution Line Amplifier Assembly. Adjust the signal generator or BDR signallevel at J4 to 0 dBm ± 0.1 dB. Using a power meter verify that the signal level at the J3 (FWDOUT/RVS IN) port of the Distribution Line Amplifier Assembly equals Gpa dBm ± 1 dB whereGpa is equal to the expected gain of the PA channel. If the gain is not equal to Gpa dBm ± 1dB, perform the steps outlined in section 2.5 for the PA output adjustment. If after completingthe amplifier setup procedure the output level of the PA channel is not Gpa dBm ± 1 dB and allNOTE
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-15external test measurement cable losses are accounted for, the amplifier should be replaced.Contact Andrew for additional information.2.5.3.1.2 PA Input Signal AlarmAttach a voltmeter to J4-3 on the Alarm I/O relay board (PA output alarm test point). TP1 orTP2 can be used as the ground connection. After removing the signal from the J4 (FWDIN/RVS OUT) port of the Distribution Line Amplifier Assembly verify that J4-3 is < 0.7 VDC. IfJ4-3 is > 1.0 VDC, perform the steps outlined in section 2.5 for the PA input alarm adjustment.If after completing the amplifier setup procedure the input alarm is not < 0.7 VDC with no inputto J4, the amplifier should be replaced. Contact Andrew for additional information.2.5.3.1.3 PA Output Signal AlarmAttach a voltmeter to J4-1 on the Alarm I/O relay board (PA output alarm test point). TP1 orTP2 can be used as the ground connection. After removing the signal from the J4 (FWDIN/RVS OUT) port of the Distribution Line Amplifier Assembly verify that J4-1 is < 0.7 VDC. IfJ4-1 is > 1.0 VDC perform the steps outlined in section 2.5 for the PA output alarmadjustment. If after completing the amplifier setup procedure the input alarm is not < 0.7 VDCwith the expected input to J4, the amplifier should be replaced. Contact Andrew for additionalinformation.
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-162.5.3.2 Forward LNA Channel VerificationSet the DLA direction to the forward direction.2.5.3.2.1 LNA Output Level VerificationAttach either a signal generator (frequency = 2467 MHz) or a MDR to J3 (FWD OUT/RVS IN)port of the Distribution Line Amplifier Assembly. Adjust the signal generator or BDR signallevel at J3 to -50 dBm ± 1 dB. Using a power meter verify that the signal level at the J4 (FWDIN/RVS OUT) port of the Distribution Line Amplifier Assembly equals Glna dBm ± 1 dB whereGlna is equal to the expected gain of the LNA channel. If the gain is not equal to Glna dBm ± 1dB perform the steps outlined in section 2.5 for the LNA output adjustment. If after completingthe amplifier setup procedure the output level of the LNA channel is not Glna dBm ± 1 dB andall external test measurement cable losses are accounted for, the amplifier should bereplaced. Contact Andrew for additional information.2.5.3.2.2 LNA Output Signal AlarmThis step assumes that the LNA output level has been set as explained in section 2.5.3.2.1Attach a voltmeter to J4-2 on the Alarm I/O relay board (LNA output alarm test point). TP1 orTP2 can be used as the ground connection. Remove the pilot tone cable from the LNAmodule J5 Aux RF IN port port. Verify that J4-2 on the Alarm I/O relay board is < 0.7 VDC. IfJ4-2 is > 0.7 VDC, perform the steps outlined in section 2.5 for the LNA output alarmadjustment. If after completing the amplifier setup procedure the output alarm is not < 0.7VDC with the previously set input level to J3, the amplifier should be replaced. ContactAndrew for additional information.2.5.3.3 Reverse PA Channel VerificationSet the DLA direction to the reverse direction.2.5.3.3.1 PA Output Level VerificationAttach either a signal generator (frequency = 2417 MHz) or a BDR to J3 (FWD OUT/RVS IN)port of the Distribution Line Amplifier Assembly. Adjust the signal generator or BDR signallevel at J3 to 0 dBm ± 1 dB. Using a power meter verify that the signal level at the J4 (FWDIN/RVS OUT) port of the Distribution Line Amplifier Assembly equals Gpa dBm ± 1 dB whereGpa is equal to the expected gain of the PA channel. If the gain is not equal to Gpa dBm ± 1dB and the Distribution Line Amplifier has not been tested for the forward direction, performthe steps outlined in section 2.5 for the PA output adjustment. If after completing theamplifier setup procedure the output level of the PA channel is not Gpa dBm ± 1 dB and allexternal test measurement cable losses are accounted for, the amplifier should be replaced.Contact Andrew for additional information.
385700-4006-006 INSTALLATIONDocument use is restricted to that described on cover 2-172.5.3.3.2 PA Input Signal AlarmAttach a voltmeter to J4-3 on the Alarm I/O relay board (PA output alarm test point). TP1 orTP2 can be used as the ground connection. After removing the signal from the J3 (FWDOUT/RVS IN) port of the Distribution Line Amplifier Assembly verify that J4-3 is < 0.7 VDC. IfJ4-3 is > 0.7 VDC and the Distribution Line Amplifier has not been tested for the forwarddirection, perform the steps outlined in section 2.5 for the PA input alarm adjustment. If aftercompleting the amplifier setup procedure the input alarm is not < 0.7 VDC with no input to J4,the amplifier should be replaced. Contact Andrew for additional information.2.5.3.3.3 PA Output Signal AlarmAttach a voltmeter to TP1 on the Alarm I/O relay board (PA output alarm test point). TP1 orTP2 can be used as the ground connection. After removing the signal from J3 (FWDOUT/RVS IN) port of the Distribution Line Amplifier Assembly, verify that J4-1 is < 0.7 VDC. IfJ4-1 is > 0.7 VDC and the Distribution Line Amplifier has not been tested for the forwarddirection, perform the steps outlined in section 2.5 for the PA output alarm adjustment. If aftercompleting the amplifier setup procedure the input alarm is not < 0.7 VDC with the expectedinput to J4, the amplifier should be replaced. Contact Andrew for additional information.2.5.3.4 Reverse LNA Channel VerificationSet the DLA direction to the reverse direction.2.5.3.4.1 LNA Output Level VerificationAttach either a signal generator (frequency = 2467 MHz) or a MDR to J4 (FWD IN/RVS OUT)port of the Distribution Line Amplifier Assembly. Adjust the signal generator or BDR signallevel at J4 to -50 dBm ± 1 dB. Using a power meter verify that the signal level at the J3 (FWDOUT/RVS IN) port of the Distribution Line Amplifier Assembly equals Glna dBm ± 1 dB whereGlna is equal to the expected gain of the LNA channel. If the gain is not equal to Glna dBm ± 1dB and the Distribution Line Amplifier has not been tested for the forward direction, performthe steps outlined in section 2.5 for the LNA output adjustment. If after completing theamplifier setup procedure the output level of the LNA channel is not Glna dBm ± 1 dB and allexternal test measurement cable losses are accounted for, the amplifier should be replaced.Contact Andrew for additional information.2.5.3.4.2 LNA Output Signal AlarmThis step assumes that the LNA output level has been set as explained in section 2.5.3.2.1Attach a voltmeter to J4-2 on the Alarm I/O relay board (PA output alarm test point). TP1 orTP2 can be used as the ground connection. Remove the pilot tone cable from the LNAmodule J5 Aux RF IN port. Verify that J4- on the Alarm I/O relay board is < 0.7 VDC. If J4-2is > 0.7 VDC, perform the steps outlined in section 2.5 for the LNA output alarm adjustment.If after completing the amplifier setup procedure the output alarm is not < 0.7 VDC with thepreviously set input level to J3, the amplifier should be replaced. Contact Andrew for additionalinformation.
385700-4006-006 OPERATIONSDocument use is restricted to that described on cover 3-1CHAPTER 3 OPERATIONS3.1 WIRING PROTECTION AND GROUNDINGThe Distribution Line Amplifier does not have controls and indicators accessible from theoutside of the unit. The DLA has two 10 Ampere fuses F1 and F2 for wiring protection on theconnector panel. Refer to Figure 3-1 DLA Connector Panel Layout.There is a ground stud on the DLA connector panel for a ground wire connection. Refer toFigure 3-1 DLA Connector Panel Layout.Figure 3-1 DLA Connector Panel Layout
385700-4006-006 OPERATIONSDocument use is restricted to that described on cover 3-23.2 STARTUP AND SHUTDOWN PRODECURESThe following procedures ensure that installation does not damage the equipment.3.2.1 DLA StartupRefer to section 4.2.1, for procedures to properly install the DLA. Mount the DLA in theequipment room or in the tunnel with no connections made. To start the DLA perform thefollowing:1. Securely connect HELIAX® cables to DLA J3 and J4 ports.2. Connect the USER control equipment to the DLA connector panel J2 port.3. Connect the VAC power supply to the DLA J1 port.3.2.2 Normal OperationRefer to section 1.4.1, Distribution Line Amplifier Principles of Operation.3.2.3 ShutdownDisconnect the DLA from the VAC power source.WARNINGIN CASE OF EMERGENCY; Immediatelyturn off power to the unit.
385700-4006-006 MAINTENANCE AND TROUBLESHOOTINGDocument use is restricted to that described on cover 4-1CHAPTER 4 MAINTENANCE AND TROUBLESHOOTING4.1 TROUBLESHOOTINGBefore beginning any in-depth troubleshooting, ensure that power is available to the unit. Ensurethat all cable connections are secure.Table 4-1 DLA Fault Isolation, describes the troubleshooting procedures for the DLA. Locatethe unit’s symptom in the Fault Indication column. The Fault Description column listscomponents or functions that can cause faults. The last column, Corrective Action, specifies theaction necessary to correct the fault. After taking corrective action, perform the appropriatediagnostic procedure to verify that the correction was successful.For malfunctions that the fault isolation table does not list, contact Andrew’s technical supportpersonnel.NOTEThe following table only isolates faults tothe LRU level. The test procedures inSection III of this chapter provideassistance for further fault isolation. If anLRU fails, return it to the equipmentmanufacturer for maintenance or repair.Step Fault Indication Fault Description Corrective Action1 No output signal No input power Verify power input cable2 No output signal No power in amplifier Replace fuses3 No output signals Poor connections Verify connections4RADIAX Alarm No BDR input signal Verify cables connections to J4 (forwarddirection) or J3 (reverse direction)5RADIAX Alarm No BDR input signal Verify preceding cascaded amplifier isoperational6RADIAX Alarm No BDR input signal If valid inputs, replace amplifier7 Amplifier Alarm No BDR and/or MDRoutput RF signals If valid inputs, replace amplifier8 Direction Controlinvalid status Direction control statusis opposite of directioncontrol input controlIf valid inputs, replace amplifierTable 4-1 DLA Fault Isolation
385700-4006-006 MAINTENANCE AND TROUBLESHOOTINGDocument use is restricted to that described on cover 4-24.2 CORRECTIVE MAINTENANCEThis section describes the removal and replacement of the DLA. See Table 4-1 DLA FaultIsolation, to determine when to remove and replace a line replaceable unit (LRU).4.2.1 Remove and Replace DLAReferring to Figure 4-1 Remove and Replace DLA, perform the following actions to remove theDLA (shown as Item 2)1. Disconnect VAC power cable from DLA (2) POWER IN (3) port.2. Disconnect the USER control equipment data cable that attaches to the DLA’sALARM/CONTROL port (6).3. Disconnect the HELIAX® cables from the RADIAX® input/out ports (4) and (5).4. Disconnect grounding wire from the grounding stud (7) on the connector panel ofthe DLA.5. Remove four bolts (1) from the DLA (2) mounting brackets.6. Remove DLA (2).Referring to Figure 4-1 Remove and Replace DLA, perform the following actions to replace theDLA:1. Place DLA (2) in position.2. Secure DLA (2) with four bolts (1).3. Reconnect the HELIAX cables to RADIAX input/output ports (4) and (5).4. Reconnect the USER control equipment data cable that attaches to the DLA’sALARM/CONTROL port (6).5. Reconnect the grounding wire to grounding stud (7).6. Reconnect the VAC power cable to the POWER IN (3) port.7. Configure Channel 1 and Channel 2 output level and status alarmadjustments per section 2.5.2 if not already performed.
385700-4006-006 MAINTENANCE AND TROUBLESHOOTINGDocument use is restricted to that described on cover 4-3Figure 4-1 Remove and Replace DLA3245671
385700-4006-006 MAINTENANCE AND TROUBLESHOOTINGDocument use is restricted to that described on cover 4-44.3 TEST PROCEDURESRefer to Table 4-2 Test Equipment, for a list of test equipment to perform the following testprocedures. If necessary, substitute an equivalent to the equipment listed.The following test procedures help the user verify that a DLA is faulty. Return faulty amplifiers toAndrew Corporation for maintenance and repair. Refer to paragraph 2.1.1 for equipment returninformation.Equipment Qty Part NumberSpectrum Analyzer 1 HP8561BPower Meter 1 HP437BPower Sensor 1 HP8481APower Sensor 1 HP8481DDigital Volt Meter 1 Fluke Model 77RF Signal Generator 1 HP 8664A10 dB Power Attenuator As required Inmet 6N10W-10Variable Attenuator As required HP 8495BCoaxial Cables As requiredTable 4-2 Test Equipment4.3.1 Inoperative Distribution Line AmplifierDANGER! High voltage shock hazard.4.3.1.1 Input Power VerificationDisconnect the power connector to the DLA. Using a DVM verify the levels of the AC inputvoltage. See Figure 2-3 DLA Input VAC Pin-outs for additional information. If the input powerlevel is present, reconnect the power connector to the DLA.If the input power is available to the DLA, open the amplifier and verify that the LED on the powersupply is illuminated. See Figure 1-3 DLA Internal View. If the LED is illuminated, then verify thecoaxial and Alarm/control signal connections.If the power supply LED is not illuminated, unscrew the two fuses at the DLA connector plate.WARNING
385700-4006-006 MAINTENANCE AND TROUBLESHOOTINGDocument use is restricted to that described on cover 4-5Remove the fuses from the holder. Measure the resistance across the fuses. If the resistance is> 1.0 ohms, replace the fuse. Reinstall the fuses in the DLA. If the fuses are operational andthe power supply remains off, replace the Distribution Line Amplifier.4.3.1.2 RADIAX Alarm AssertedAssertion of the RADIAX input alarm indicates a loss of signal (Signal Center Frequency is2416.64 MHz) from the preceding Distribution Line Amplifier and or base station radio. Thefollowing trouble shooting procedure assumes that the amplifiers are cascaded in the forwardconfiguration normal direction mode and that the amplifier has been correctly configured asindicated in 2.5.Visually inspect the cable assemblies from the preceding amplifier or radio for loose connectionsand or cable breakage. Tighten all cable connections. Replace broken or damaged cables asnecessary.If all cable assemblies are secure and intact, disconnect the cable at J4 of the DLA. Using apower meter or spectrum analyzer attached to the cable, verify the presence and expected levelof the RF signal (Fc = 2416.64 MHz, 0 dBm nominal). If the signal is present and the alarm isconfigured correctly (refer to section 2.5.2.2.2) the amplifier should be replaced. If the RF signalis not present continue to determine the origin of the signal loss.4.3.1.3 Amplifier Alarm AssertedAssertion of the Amplifier Alarm can be caused by:• Loss of an input signal on the PA Channel (RADIAX Alarm Asserted)• Failure of the PA module• Loss of the Pilot Tone Signal to the LNA module• Failure of the LNA module.4.3.1.3.1 Loss of PA Input SignalWhen the RADIAX Alarm is asserted, the loss of input signal can also cause the PA module toalso assert its output alarm. With a loss of input signal, the PA module gain is insufficient togenerate a signal level above the level represented by the output threshold detector in the PAmodule. If both the RADIAX alarm signal and the Amplifier Alarm signals are asserted, the usershould determine the cause for the loss of input signal.4.3.1.3.2 PA Module FailureIf the input signal to the PA channel is at the expected level and the PA channel output alarm isasserted, either the PA module has failed or it is incorrectly configured. The PA module outputalarm can be monitored with a DVM at J4-1 of the Relay/IO board. A voltage level < 1 VDCindicates a fault condition for the PA channel.The output signal can be measured with a power meter or spectrum analyzer. If no signal isdetected at the Distribution Line Amplifier output port (J3 for the forward direction) the unit shouldbe returned to Andrew Corporation. If a signal is present, the user should confirm that theamplifier output is below the levels indicated on the configuration sheet attached to theDistribution Line Amplifier. If the input and output signal levels are at the levels specified on the
385700-4006-006 MAINTENANCE AND TROUBLESHOOTINGDocument use is restricted to that described on cover 4-6configuration sheet, the PA module alarm may be indicating a faulty setting on the output levelmonitor. Refer to section 2.5.2.2.4 for details on setting the output alarm. If the output levelmonitor is correctly configured, the Distribution Line Amplifier should be returned to AndrewCorporation.4.3.1.3.3 Loss of Pilot Tone SignalIn a correctly configured DLA, the pilot tone is monitored by the LNA output detector circuit.Without the pilot tone there may not be sufficient signal at the LNA module output. As a result,the LNA module will signal an amplifier failure. The pilot tone signal can be monitored with eithera power meter or a spectrum analyzer.Figure 1-3 DLA Internal View shows the location of the pilot tone module and its output port J3.The expected output at the pilot tone module J3 port is a nominal - 10 dBm signal at 2401 ± 2MHz. If this signal is not present, the Distribution Line Amplifier should be returned to AndrewCorporation. If the signal is present, reattach the cable from J3 of the pilot tone module to theLNA module AUX RF input port. Tighten the connections as necessary.4.3.1.3.4 LNA Module FailureIf the pilot tone signal to the LNA channel is at the expected level and the LNA channel outputalarm is asserted, either the LNA module has failed or it is incorrectly configured. The LNAmodule output alarm can be monitored with a DVM at J4-2 on the Relay/IO board. A voltagelevel < 1 VDC indicates a fault condition for the LNA channel.In order to measure the output of the LNA channel, it is necessary to inject an external signal intothe LNA channel. The external signal can be either a CW signal at a frequency in the passbandof the LNA channel (see Table 1-2 Distribution Line Amplifier Specifications in section 1.5.2) or itcan be the output signal of an MDR. In either case, the signal input level to J3 of the DLA(normal forward configuration) should be -50 dBm.Based on the gain setting specified on the configuration sheet attached to the DLA, the externalsignal can be verified with a power meter or spectrum analyzer. If no signal is detected at theDistribution Line Amplifier output port (J4 for the forward direction) the DLA should be returned toAndrew Corporation. If a signal is present, the user should confirm that the amplifier output isbelow the levels indicated on the configuration sheet attached to the Distribution Line Amplifier.If the measured level is below the expected value the Distribution Line Amplifier should bereturned to Andrew Corporation. If the input and output signal levels are at the levels specifiedon the configuration sheet, the PA module alarm may be indicating a faulty setting on the outputlevel monitor. Refer to section 2.5 for details on setting the output alarm. If the output levelmonitor is correctly configured, the Distribution Line Amplifier should be returned to AndrewCorporation
385700-4006-006 ORDERING INFORMATIONDocument use is restricted to that described on cover 5-1CHAPTER 5 ORDERING INFORMATION5.1 PARTS LISTThis chapter provides a list of replacement parts and mating connectors for the DistributionLine Amplifier assembly. It also provides vendor names and addresses. Table 1-1 – DLAPart Numbers lists the various versions of the DLA and their respective part numbers. Figure1-1 Distribution Line Amplifier (4 port) shows all of the items on the list. To procure any of theparts, contact Andrew Corporation or the appropriate vendor for the part.The parts list includes three columns: Description, Part Number, and Quantity (Qty). TheDescription column identifies the specific part, beginning with the assembly or line-replaceableunit (LRU) that contains it. The information in the Description column includes an (AP) symbolto denote attaching hardware for the LRUs. The Part Number column provides the vendor’snumber for that drawing or part. The Quantity column defines how many of the particular partthe next higher assembly (NHA) contains.Table 5-1 provides a list of applicable vendors and their addresses.Vendor Address (Phone Number)Andrew Corporation 2601 Telecom ParkwayRichardson, Texas 75082-3521(972) 235-7300ITT CorporationITT Canon Division 666 East Dyer RoadSanta Ana, CA 92702Bussman P.O. Box 14460St Louis, MO 63178314-394-2877Table 5-1 Vendors
385700-4006-006 ORDERING INFORMATIONDocument use is restricted to that described on cover 5-2Table 5-2 provides a list of replaceable parts and mating connectors for the amplifierassemblies.Description Part Number QtyDistribution Line Amplifier 385700-4000 1Mating Power Connector Assembly (J1) MS3475W14-4S 1Mating Alarm/Control Connector (J2) MS3126F20-16S orKPSE08F20-16S 1AC Fuses (F1, F2) Bussman MDA-10 2Table 5-2 Parts List
385700-4006-006 MECHANICAL INFORMATIONDocument use is restricted to that described on cover 6-1CHAPTER 6 MECHANICAL INFORMATIONFigure 6-1 DLA Mechanical Outline
385700-4006-006 ALARM/CONTROL TESTCIRCUITDocument use is restricted to that described on cover 7-1CHAPTER 7 ALARM/CONTROL TEST CIRCUITThe following schematic can be used to construct a test fixture to control the direction of the DLA and to monitor the status of the variousFigure 7-1
385700-4006-006 ALARM/CONTROL TESTCIRCUITDocument use is restricted to that described on cover 7-2
385700-4006-006 ALARM/CONTROL TESTCIRCUITDocument use is restricted to that described on cover 7-3
385700-4006-006 ALARM/CONTROL TESTCIRCUITDocument use is restricted to that described on cover 7-4
385700-4006-006 ALARM/CONTROL TESTCIRCUITDocument use is restricted to that described on cover 7-5alarms. The test fixture connects to J2 Alarm/Control of the DLA. This test fixture requires an external 24 VDC supply. The circuit should bemounted within a metal enclosure so that the required cable shielding integrity is maintained.

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