Aviat Networks MDR2400-THC Spread Spectrum Assembly T1 Antenna System User Manual MDR2400 User s Manual

Aviat Networks Spread Spectrum Assembly T1 Antenna System MDR2400 User s Manual

Users Manual

862-01545 µLink System ManualIssue 1b Page iµµLink Digital RadioSystem ManualPublication Number: 862-01545Issue 1bFebruary 1999Tellumat (Pty) LimitedReg. No. 96/000957/0764/74 White Road, Retreat, 7945P.O. Box 30451, Tokai, 7966Telephone: +27 21 710-2911Fax No. +27 21 710-2333
µLink System Manual 862-01545Page ii Issue 1bFederal Communications Commission NoticeNOTEThe equipment has been tested and found to comply with the limits for a Class Adigital devices, pursuant to Part 15 of the FCC Rules.These limits are designed to provide reasonable protection against harmfulinterference when the equipment is operated in a commercial environment. Thisequipment generates, uses, and can radiate radio frequency energy and, if notinstalled and used in accordance with the instruction manual, may cause harmfulinterference to radio communications.Operation of this equipment in a residential area is likely to cause harmfulinterference in which case the user will be required to correct the interference at hisown expense.The manufacturer is not responsible for any radio or TV interference caused byunauthorised modifications to this equipment. Such modifications could void theuser's authority to operate the equipment.This device complies with Part 15 of the FCC Rules. Operation is subject to thefollowing two conditions: (1) this device may not cause interference, and (2) thisdevice must accept any interference, including interference that may cause undesiredoperation of the device.This equipment must be professionally installed.PER FCC rules 15.247 (b)(4)WARNING! ALL PERSONNEL SHOULD STAY ATLEAST 1 METER (3.5') FROM THE ANTENNA TOAVOID EXPOSURE TO POSSIBLE MICROWAVEENERGY.
862-01545 µLink System ManualIssue 1b Page iiiDocument Issue StatusWhen an issue status of this manual changes, the record below must becompleted and initialled.PageNo. IssueStatus Authority(ECN No.) PageNo. IssueStatus Authority(ECN No.)1 - 78 11 - 82 1b
µLink System Manual 862-01545Page iv Issue 1bTable of Contents PageChapter 1: Purpose and Planning ............................................................1Introduction to Chapter 1....................................................................1µLink Product Family.........................................................................1Role and Purpose................................................................................1System Description......................................................................................2System Overview................................................................................2Features..............................................................................................2System Configuration Options ............................................................5Interface Definitions...........................................................................6Planning Information..........................................................................7Site Evaluation...............................................................................7Multipath Effects ...........................................................................8Installation Information......................................................................9General Information.......................................................................9Indoor Unit ....................................................................................9Outdoor Unit and Antenna.............................................................9Operational Capabilities ...................................................................10Maintenance Features.......................................................................11Built-in Test Features...................................................................11System Specifications .......................................................................12Performance Characteristics.........................................................12Data Transmission Characteristics ...............................................12Transmitter Characteristics ..........................................................13Receiver Characteristics...............................................................13Wayside Service Channel.............................................................14Auxiliary/Alarm Interfaces...........................................................14Power Supply Characteristics .......................................................15Controls and Displays ..................................................................15Antenna Characteristics (µLink -T)..............................................16Equipment Status Monitoring ......................................................17Mechanical Characteristics ..........................................................18Environmental Characteristics .....................................................18Frequency Band Plan........................................................................19
862-01545 µLink System ManualIssue 1b Page vChapter 2: Installation........................................................................... 21Introduction to Chapter 2 ................................................................. 21Site Requirements ............................................................................ 21Parts and Accessories Supplied for Installation................................. 22Customer Furnished Tools and Equipment....................................... 23Installation Overview....................................................................... 24Antenna Installation.................................................................... 24Outdoor Unit Installation............................................................. 26Indoor Unit Installation ............................................................... 29Interconnection Cable Installation ............................................... 31System Commissioning.................................................................... 33Information Required....................................................................... 33Commissioning Procedure................................................................ 33Setting-up Procedure ................................................................... 33Beaming-up................................................................................. 33Set Critical Parameters ................................................................ 33Link Error Performance Test............................................................ 34Appendix A to Chapter 2: ......................................................................... 35µLink External Connector Pin Details .................................................. 35Indoor Unit Connector Pin Details ................................................... 35Outdoor Unit Connector Pin Details................................................. 38Chapter 3: Operational Information ..................................................... 39Introduction to Chapter 3 ................................................................. 39Indoor Unit (IU) Controls, Indicators and Connectors ...................... 39Front Panel.................................................................................. 39Indoor Unit (IU) Controls, Indicators and Connectors ...................... 43Rear Panel................................................................................... 43Chapter 4: µµLink Management System ................................................ 45General Information......................................................................... 45Hardware (supplied by Customer) .................................................... 45Software and Hardware (supplied by Tellumat) ................................ 46Setting-up ........................................................................................ 46Accessing the Software Program ...................................................... 47Menu Structure ................................................................................ 47Main Screen ................................................................................ 48Short-cut Buttons Area ................................................................ 49
µLink System Manual 862-01545Page vi Issue 1bStation Control Screen......................................................................51Indoor Unit: Configuration...........................................................52Indoor Unit: Build State...............................................................53Indoor Unit: Status.......................................................................54Outdoor Unit: Configuration ........................................................58Outdoor Unit: Build State............................................................60Outdoor Unit: Status ...................................................................61Chapter 5: Maintenance Information ....................................................63Introduction to Chapter 5..................................................................63Fault Diagnosis.................................................................................63Chapter 6: Functional Description.........................................................65Introduction to Chapter 6..................................................................65µLink System Description.................................................................65Indoor Unit ..................................................................................66Chapter 7: Parts List ..............................................................................67Introduction to Chapter 7..................................................................67Parts Lists.........................................................................................67
862-01545 µLink System ManualIssue 1b Page viiList of IllustrationsFigure PageFigure 1. µLink Indoor Unit....................................................................... 3Figure 2. µLink Outdoor Unit and Antenna................................................ 3Figure 3. System Overview Block Diagram. ............................................... 4Figure 4. Multipath Effects......................................................................... 8Figure 5. Frequency Band Plan................................................................. 19Figure 6. µLink Antenna.......................................................................... 25Figure 7. µLink Outdoor Unit................................................................... 26Figure 8. Indoor Unit Rear Panel.............................................................. 30Figure 9. Outdoor Unit Mounted on Antenna. .......................................... 32Figure 10. IU Front Panel Controls, Indicators and Connectors. ............... 40Figure 11. IU Rear Panel Controls, Indicators and Connectors. ................ 43Figure 12. µLink Management Software: Typical Main Screen. .............. 48Figure 13. Typical Station Control Screen................................................ 50Figure 14. Indoor Unit: Typical Configuration Screen............................. 52Figure 15. Indoor Unit: Typical Build State Screen. ................................ 53Figure 16. Indoor Unit: Typical Status Screen. ........................................ 54Figure 17. Indoor Unit: Typical Failure Alarm Details Screen................. 55Figure 18. Indoor Unit: Typical Site Alarms and Control Screen............. 56Figure 19. Indoor Unit: Typical Service Alarm Details Screen................. 57Figure 20. Outdoor Unit: Typical Configuration Screen........................... 58Figure 21. Outdoor Unit: Typical Build State Screen............................... 60Figure 22. Outdoor Unit: Typical Status Screen....................................... 61Figure 23. µLink System.......................................................................... 68List of TablesTable PageTable 1. µLink System Data Interface Variants .......................................... 5Table 2. µLink System RF Configurations.................................................. 5Table 3. µLink System: User Services ....................................................... 6Table 4. Link Error Performance Check List ............................................ 34Table 5. IU Front Panel: Controls, Indicators and Connectors ................. 41Table 6. Status LEDs:............................................................................... 42Table 7. IU Rear Panel: Controls, Indicators and Connectors................... 44Table 8. µLink System Level Parts List .................................................... 69
µLink System Manual 862-01545Page viii Issue 1bNote to Reader1. Users must be familiar with the Windows 95 operatingenvironment.© 1999 Tellumat (Pty) LimitedThe information contained herein is the property of Tellumat (Pty) Limited and issupplied without liability for errors or omissions. No part may be reproduced, usedor disclosed except as authorised by contract or other written permission. Thecopyright and the foregoing restriction on reproduction, use and disclosure extend toall media in which this information may be embodied, including magnetic orelectronic storage etc.
862-01545 µLink System ManualIssue 1b Page ixList of AbbreviationsAC Alternate CurrentAIS All Ones (“1’s”) (detected)BER Bit Error RateBPSK Binary encoded Phase Shift KeyingCBIT Continuous Built in TestCRC Cyclic Redundancy CheckDC Direct CurrentDCE Data Communications EquipmentDRL Digital Radio LinkDRS Digital Radio StationDTE Data Terminal EquipmentFPGA Field Programmable Gate ArrayIBIT Initiated Built in TestIU Indoor UnitLAN Local Area NetworkLED Light Emitting DiodeLRU Line Replaceable UnitMDR Microwave Digital RadioMIB Management Information BaseMMIC Monolithic Microwave Integrated CircuitMTBF Mean Time Between FailureMTTR Mean Time To RepairN.C Normally ClosedN.O Normally OpenNMS Network Management SystemOU Outdoor UnitPC Personal ComputerPCB Printed Circuit Board
µLink System Manual 862-01545Page xIssue 1bPLL Phase Locked LoopQPSK Quadrature Phase Shift KeyingRAM Random Access MemoryRF Radio FrequencySBIT Start-up Built in TestSDC Serial Data ChannelSNMP Simple Network Management ProtocolSRD System Requirements DefinitionSRU Shop Replaceable UnitTMN Transmission Management NetworkTTL Transistor-Transistor LogicVSWR Voltage Standing Wave RatioWAN Wide Area Network
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862-01545 µLink System ManualIssue 1 Page 1Chapter 1: Purpose and PlanningIntroduction toChapter 1 Chapter 1 is aimed at management and planning staffto enable them to assess the suitability and logisticrequirements of the µLink Digital Radio, hereafterreferred to as the µLink.µµLink ProductFamily The µLink design philosophy was to produce a rangeof products, with the data rate dependent purely on theIndoor Unit (IU) and the frequency band dependentpurely on the Outdoor Unit (OU). Thus resulting in acommon IU that can operate with different frequencyOUs, or alternatively, an OU that remains unchangedwhile the data rate is altered or upgraded.Role and Purpose The µLink operates in the 2.4 GHz ISM frequencyband. It provides a full duplex, point-to-point, digitalradio link supporting user data rates up to 2048 kbit/s.It is used to transport digital data between two or moresites. Whether the digital information is voice,telephony, cellular, data or video as required byvarious applications, the µLink can be deployed inurban and rural networks as an interconnect solution.Typical applications for the system include:• Telecommunications companies, cellular operatorsand private carriers using low cost spread spectrumE1/T1 links to substitute for conventional copper orlicences band microwave links• Providing last mile leg in urban areas wherefrequency bands are congested• Rural communications• Corporate Networks
µLink System Manual 862-01545Page 2Issue 1bSystem DescriptionSystem Overview A µLink digital radio relay link (DRL) consists of atleast one complementary pair of µLink stations thatmay be extended over longer distances by linkingfurther station pairs in a multiple hop configuration. Asingle µLink station comprises an Indoor Unit (Figure1), an Outdoor Unit and Antenna (Figure 2). TheIndoor Unit (IU) and Outdoor Unit (OU) areinterconnected by a custom cable. Figure 3 is a blockdiagram of an µLink DRL.Features The µLink offers the following key features:• T1 and E1 payload data interface options.• IU is independent of OU frequency band and theOU is independent of IU data interfaces.• Network management features, including remoteperformance monitoring and configurability are tobe included in future upgrade products.• The equipment is compact and versatile, enablingfast deployment.• The system offers high data link reliability.• Maintenance requirements are minimal.• The system provides built-in-diagnostic and testfeatures.• Co-locate two (2) antennas on a single mast.
862-01545 µLink System ManualIssue 1 Page 3Figure 1. µµLink Indoor Unit.Figure 2. µµLink Outdoor Unit and Antenna.AntennaOutdoorUnitInterconnectionCable
µLink System Manual 862-01545Page 4Issue 1bFigure 3. System Overview Block Diagram.
862-01545 µLink System ManualIssue 1 Page 5SystemConfigurationOptionsTable 1 lists the two model variants of the µLinkSystem, with the input data classification and the radiolink data rate. Table 2 lists the possible RFconfigurations with the output power, coupling type,antenna type and regulations with which the unitcomplies.Table 1. µµLink System Data Interface VariantsModel Number Payload Data Typeand Rate Link Rate PN CodeLengthµLink - E E1, 2048 kbit/s 2112 kbit/s 11µLink - T T1, 1544 kbit/s 2000 kbit/s 13Table 2. µµLink System RF ConfigurationsOption OutputPower Coupling Antenna RegulationsµLink – LC +14 dBm CustomNon-ohmic Flat PanelTx = 8 dBi GTSI-300-328µLink – HC +14 dBm+26 dBm CustomNon-ohmic Flat PanelTx = 18 dBi FCC-15.247µLink – D +10 dBm -+30 dBm N-typeFemale CustomerSupplied FCC-15.247/None
µLink System Manual 862-01545Page 6Issue 1bInterfaceDefinitions The µLink System has the following user services: (seeTable 3).Table 3. µµLink System: User ServicesPayload Data InterfacesE1 Data Interface 120Ω RJ-45/75Ω BNC (factory set). Bipolar AMIor HDB3 selectable.T1 Data Interface 100Ω/75Ω (factory selectable), RJ-45 or BNCConnector. Bipolar AMI or B8ZS selectable.Wayside Serial Data ChannelProvided for user data. Supports asynchronous full duplex serial datatransfer (with hardware control). 300 to 19200 baud (software selectable).Auxiliary / Alarm Inputs and OutputsInputs Two (2) Switch Closure Sense inputs areprovided.Outputs Two (2) isolated relay contact outputs areprovided. These are presented to the customer asthree output, namely Common, NO and NC.
862-01545 µLink System ManualIssue 1 Page 7PlanningInformation Site EvaluationWhen planning a site for a digital radio relay link, it isof the utmost importance that you take the operationalenvironment of the proposed site into account.The combined effect of atmospheric environmentalfactors such as rain and lightning, atmosphericattenuation, signal path obstruction, propagationfading, air temperature gradients, ice build-up, windand solar radiation can contribute towards reducingthe level of performance of the system (as measured interms of its capability to transfer data without error).In the higher frequency bands, rainfall is the mainattenuation mechanism which limits errorperformance. Ice and snow will obviously have asimilar effect. Severely cold, and excessively warmclimatic conditions outside the scope of the operatingtemperature range can affect the function of thesystem, especially the outdoor equipment (seeEnvironmental Characteristics on page 18 of thismanual).Also, if masts are not sufficiently rigid, very strongwinds can affect the antenna beam alignment andoutdoor equipment reliability due to wind force build-up and/or vibration in the mast mounted equipment.Non-atmospheric environmental factors such as theelectromagnetic interference due to the presence ofother antennas, path clutter and terrain topographycan also have a detrimental effect on systemperformance and should be carefully assessed beforeand during installation.
µLink System Manual 862-01545Page 8Issue 1bMultipath EffectsRefer to Figure 4. The µLink digital radio operates at afrequency of 2.4 GHz. It is likely that it will beinfluenced by the effects of multipath. Understandingthese effects will help to install the µLink digital radiolink and maximise the reliability of the link.Multipath fade occurs when the receiving antennareceives not only the direct signal from the transmittingantenna but also a signal from the transmitting antennathat has reflected off the ground or nearby obstacles.The reflected signal takes a longer path to reach thereceiver and acts as an interferer since it is not in phasewith the direct signal. The amplitude of this interferercan be almost equal to that of the direct path, thusdegrading the link.Multipath is dependent on transmit frequency and thespecific geometry of the link such as antenna heights,distance between the antennas and the local terrain. Tocounteract multipath, the installer can change thefrequency at which the link operates (a change by 1channel should be sufficient) or slightly adjust the heightof one or both of the antennas ( a change of 0.5m istypical, but this depends on the geometry of the link).User DataMDR2400 OUMDR2400 IUUser DataMDR2400 OUMDR2400 IUDirect RF PathReflection PathFigure 4. Multipath Effects.
862-01545 µLink System ManualIssue 1 Page 9InstallationInformation General InformationThis section contains only general information andinstallation guidelines for the µLink. Specificinstallation instructions for the Indoor Unit (IU),Outdoor Unit (OU), Antenna and InterconnectionCable are provided in Chapter 2 of this manual.Indoor UnitThe IU is designed for mounting in the DIN 41494(19") racking standard. It is 1U in height, 390 mm indepth and has a mass of < 6 kg. Optional table-topmounting is possible by fitting rubber feet.The IUs main data, wayside data, power and alarminterfaces are located on the rear panel, suitable forrack installations. For commissioning and testing, theMonitor connector (used for the Craft Terminal) islocated on the IU front panel.Outdoor Unit and AntennaThe OU is fastened to the antenna. The OU / Antennacombination is then mounted to a pole (50 mm to 102mm in diameter) using mounting brackets. Onceinstalled, this allows for replacement of the OUwithout the need to realign the antenna.
µLink System Manual 862-01545Page 10 Issue 1bOperationalCapabilities The user can view equipment status and configurationdata of all MDR equipment attached in a multiple hoplink from the IU to which the Craft Terminal isattached. The µLink has the following capabilities:Upload Indoor Unit Software. Allows you to transfera file of executable code from the Craft Terminal tothe IU Microprocessor non-volatile memory.View Equipment Data. Allows you to view thefollowing:• Equipment Status• Alarms and Alarm History• Equipment Configuration and Settings• Data Transmission Performance Characteristics• Data Channel Options• Equipment Date and TimeControl Equipment. Allows you to configure and/orset system parameters such as; channel selection, RFpower level, transmitter on/off, data options, plantalarm options, etc.Built-in Testing. Performs the following built-intests:• Start-up BIT (SBIT)• Continuous BIT (CBIT)• Initiated BIT (IBIT) - user initiatedReal Time Clock Interface. Used to time stamp thecommand and error log with the current time.History Logging. Logs all CBIT, SBIT commandsand responses issued and received by the Indoor Unit.
862-01545 µLink System ManualIssue 1 Page 11MaintenanceFeatures a. No routine maintenance required.b. Mean time to repair after arrival on site is less than30 minutes, provided that the units to be repairedare reasonably accessible.c. Extensive self-diagnostics with software-based faultlocalisation.d. Craft Terminal diagnostics, control andmanagement functions are able to access any localor remote station equipment linked by radio.e. IU alarm display allows for simple fault diagnostics.f. IU common to all OUs.g. All panels and covers can be removed with one tool.h. No special external test equipment is required tomaintain the system.i. OU can be replaced without having to re-align theantenna.Built-in TestFeatures The µLink has the following built-in test features:• LED alarm and status indicators on IU Front Panel.• Remote unit alarms indicated similar to the localunit’s alarms.• Historic alarm logging (last 1000 events).• CRC-4 error detection on user data.• Loss of Data Input Detection.• Loss of Frame Detection on Radio Frames.• Automatic AIS Insertion.• Input Data Loopback.• Output Data Loopback.• Payload data Output Enable/Disable function.• Real Time Clock for time-stamping of alarm andother events (Y2K compatible).
µLink System Manual 862-01545Page 12 Issue 1bSystemSpecifications The µLink has the following specifications:PerformanceCharacteristics Link Range:Low power Coupler type. Up to 10 km. Provides a linkmargin of 18 dB based on a 10E-5 BER for an E1 link.High Power Coupler type. Up to 30km using a18 dBi Tx/Rx antenna. Provides a link margin of22 dB based on a 10E-5 BER for an E1 link.High Power Diplexer type. Up to 40 km using a22 dBi antenna. Provides a link margin of 22 dBbased on a 10E-5 BER for an E1 link.System Start-up Time. Less than ten (10) seconds (at25 ºC). If ambient temperature is < -15 ºC, it takes10 mins. before system operates to full specification.Data TransmissionCharacteristics Description Characteristicsa. Frequency Band 2.400 GHz to 2.4835 GHzb. Go/Return spacing 42 MHz (E1, T1)c. Data Rate Options 2048, 1544 (T1) kbit/s.d. InterfaceStandards ITU-T G.703, G.704,G.706, G.823e. Jitter and Wander ITU-T G.823f. Modulation QPSKg. Error DetectionCode CRC-4h. Background BER < 10-11
862-01545 µLink System ManualIssue 1 Page 13TransmitterCharacteristics Description Characteristica. Carrier Frequency Band 2.400 to 2.442 GHz (LB)2.442 to 2.4835 GHz (HB)b. Modulation B/width (max) 23.5 MHzc. Link Data Rate (max) 2142 kbit/sd. Tx Power, max. oper. +12 dBm (Low Power)+24 dBm (High Power)+30 dBm (Diplexer)e. Tx Power, min. oper. +10 dBm (All options)f. Frequency Stability ±7ppmg. Tuning method Microprocessor-controlled PLLsh. Transmitter disable under software controli. Modulation disable under software controlj. Spurious Emissions comply fully with FCC 15.247,FCC 15.201 and ETSI 300-328ReceiverCharacteristics Descriptiona. Sensitivity measured at radio module inputconnector (typical):Data Rate (kbit/s) BER=10-6 (dBm)2048 -90b. Spurious Response Rejection complies with ETS300-328c. Spurious Emissions-see TransmitterCharacteristicsd. Equipment Background BER < 10-11 (Receive levelbetween 9 and 34 dB above threshold).
µLink System Manual 862-01545Page 14 Issue 1bWayside ServiceChannel Description• One (1) wayside service channel of RS-232 serialdata up to a baud rate of 19200 is provided.• The serial data channel provides simultaneous,full duplex serial data transfer between stations.Data rates range from 300 to 19200 baud. TheRS-232 standard is provided, with the followingsignals : TxD, RxD and Signal Ground.• The interface provides a DCE (DataCommunications Equipment) interface mode.Auxiliary/AlarmInterfaces Descriptiona. Two (2) inputs (for sensing contact closure oropening) are provided to sense site alarm inputs.The states of these alarm inputs are accessiblefrom connected management equipment, as wellas from the IU Front Panel.b. Two (2) relay contact outputs, normally open(N.O.) and normally closed (N.C.) contacts, areprovided as alarm / auxiliary outputs. Outputstates are software customised and controlled.The outputs are used to indicate alarm or otherstates selected by the operator.
862-01545 µLink System ManualIssue 1 Page 15Power SupplyCharacteristics Descriptiona. Input supply voltage (DC) 21.5 to 56 VDCb. Input supply voltage (AC) 100 to 240 VACc. Power Consumption < 20 Wd. Selection of a single DC supply or an AC supply tothe IU. The OU is supplied by an isolated singleDC supply fed from the IU via the interconnectingcable.e. Reverse voltage protection for equipment andsupply (DC option only).Controls andDisplays Descriptiona. The µLink IU has an LED alarm and statusdisplay. All control functions are accessed via theCraft Terminal.b. The operator can perform all essential control andmanagement functions of both the near and far endstation equipment in the link using the CraftTerminal.
µLink System Manual 862-01545Page 16 Issue 1bAntennaCharacteristics(µµLink -C) Description Characteristica. Size 550 mm x 550 mm x 25 mm flatpanel sealed constructionb. Frequency 2.400 GHz to 2.4835 GHzc. Gain Tx 18 dBi ± 0.2 dBd. Gain Rx 18 dBi ± 0.4 dBe. Connection non-ohmic coupling to the OUf. VSWR < 1.5 : 1g. Isolation Tx/Rx > 40 dBh. Polarisation Tx / Rx OrthogonalThe µLink -D type can use antennas from other manufacturers. Refer to thesetup procedures on page 27 to determine the power level settings requiredfor different antenna gains.
862-01545 µLink System ManualIssue 1 Page 17Equipment StatusMonitoringDescriptiona. Indoor Unit Status. The IU monitors the state ofthe baseband signals in the Information Base andinforms the State and Mode Control function ofany problems or failures.b. Outdoor Unit Status. The OU transmits aperiodic status message to the IU containing thestatus of the OU. The Fault and Status Manager inthe IU monitors this, updates the Information Baseand informs the State and Mode Control functionof any problems.c. Far-end Radio Station Status. The near end IUtransmits a periodic status message to the remoteIU. The Fault and Status Manager in the remoteIU determines if the transmitting IU is functioningnormally then updates the Information Base andinforms the State and Mode Control function ofany problems.d. Health Monitoring. A background processcontinuously checks the health of the systemhardware and software and reports any anomaliesto the Management Information Base (MIB). TheFault Manager responds to this information.
µLink System Manual 862-01545Page 18 Issue 1bMechanicalCharacteristics Description Characteristica. MassOU (no antenna)IU < 4 kg< 6 kgb. IU RackingStandard 19" DIN 41494, 1Uc. OU MountingStandard Pole mount brackets.50 to 102 mm pole diameter.EnvironmentalCharacteristics Description Characteristica. Temp. Range• Indoor Unit• Outdoor Unit0 to +50ºC (operating)-40 to +70ºC (survival)-20 to +70ºC (operating)-40 to +70ºC (survival)b. Humidity• Indoor Unit• Outdoor Unit5 to >90% (weatherprotected locations)8 to 100% (all weather)c. Wind Speed (OutdoorEquipment) up to 160 km/h(functional)d. OperatingAtmospheric Pressure 0.7 to 1.06 kPae. Lightning Protection ITU-T K.20 for:PSU, Payload Data andInterconnection Cable
862-01545 µLink System ManualIssue 1 Page 19Frequency BandPlan Refer to Figure 5. The µLink Digital Radio operatesin the 2.4 GHz to 2.4835 GHz ISM frequency band.The µLink has predefined channels allocated withinthis band (Channels A and B). The recommendedchannel spacing between transmit and receivefrequencies is 42 MHz. This is based on thebandwidth occupied by the spread spectrum signal andis used to maximise link performance.AAB B2412 2430 2454 2472Frequency (MHz)LOW BAND TRANSMIT HIGH BAND TRANSMITThe recommended frequency pairs for the channel plan are :A : 2412 & 2454 MHzB : 2430 & 2472 MHzFigure 5. Frequency Band Plan.
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862-01545 µLink System ManualIssue 1 Page 21Chapter 2: InstallationIntroduction toChapter 2 Chapter 2 provides the installation personnel with theinformation required to assemble, install andcommission the µLink System.Site Requirements Before installing the µLink, ensure that theinstallation site meets the following requirements:• Site characteristics are satisfactory (see PlanningInformation on page 7).• Suitable mast (pole) used for Antenna and OutdoorUnit (OU) installation is firmly in position. Polediameter may be between 50 and 102 mm.CAUTIONTHE POLE AND THE EQUIPMENT ROOM,WHICH HOUSES THE INDOOR UNIT (IU)MUST BE EARTHED FOR LIGHTNINGPROTECTION ACCORDING TO STANDARDLOCAL PRACTICES.
µLink System Manual 862-01545Page 22 Issue 1bParts andAccessoriesSupplied forInstallationThe following parts and accessories are supplied byTellumat for the installation of the µLink System.Note that this list relates to the parts supplied for asystem at a DRS, ie. one end of a DRL.Description Qty RemarksAntenna 1The antenna is shipped witha complete installation kitincluding O-rings, mountingbrackets, nuts and bolts etc.Outdoor Unit(OU) 1Ensure OU is compatiblewith the antenna provided.If the customer is using hisown Antenna, the OU will bedelivered pre-mounted on apole adaptor plate.Indoor Unit(IU) 1Data InterfaceCard 1E1 or T1.InterconnectionCable 110 m, 20 m, 50 m or 75 m inlength as ordered. Used toconnect the IU to the OU.
862-01545 µLink System ManualIssue 1 Page 23CustomerFurnished Toolsand EquipmentThe following table lists all tools and equipmentrequired to install the µLink System. Note that theseitems must be supplied by the customerDescription Qty Remarks13 mm Spanner 1Used to secure the Antennato the Pole.8 mm Spanner 1Used to secure the AntennaMounting Bracket to theAntenna.Large FlatScrewdriver 1As above.Earth Cable orStrap with5 mm earth lug1For earthing the IU. Braidedtube, copper tinned. Gauge 4mm CSA. 8 x 1 mm thick,45 A, 24/12/0,16.Cable Ties A/R Used to secure the cable tothe mast at regular intervals.AC SupplyCableORDC SupplyCable1OR1Standard 3-pin IEC AC plug.For AC supply connection tothe rear panel of the IU.Minimum 2.5 mm squareconductor, rated for 10 A.For connection between thepower supply and the IU DCconnector on the rear panel.Binoculars(optional)1Used for locating the far endsite. This will assist in theantenna alignment operation.
µLink System Manual 862-01545Page 24 Issue 1bInstallationOverview Installation of the µLink is described under thefollowing four main headings:a. Installing the Outdoor Unit (OU) and IntegralAntenna.b. Installing the Indoor Unit (IU).c. Installing the IU/OU Interconnection Cable.d. System Commissioning.To supplement the installation procedure, thefollowing appendix is provided at the end of thischapter:• Appendix A provides connector pin details for theexternal connectors of the IU and OUs.AntennaInstallation Follow these general steps to install the Antenna.Refer to the Antenna Manufacturer’s installationinstructions for specific types of antennas.Step Action1. Secure the C-shaped mounting bracket to theAntenna using the two securing screws andbolts (see Figure 6).2. Position the antenna in the required positionon the pole. Note the orientation of theantenna.3. Secure the antenna to the pole by tighteningthe mounting bracket securing nuts (two nutson either end of the pole clamp).CAUTIONENSURE THAT THE POLE IS EARTHED FORLIGHTNING PROTECTION ACCORDING TOSTANDARD LOCAL PRACTICES.
862-01545 µLink System ManualIssue 1 Page 25Figure 6. µµLink -C Antenna.Antenna MountingBracket SecuringHolesAntenna MountingBracket SecuringHolesOutdoor UnitMounting Stand-offNuts
µLink System Manual 862-01545Page 26 Issue 1bOutdoor UnitInstallation Follow these steps to mount the OU onto the Antenna.See Figure 6 and Figure 7.Step Action1. Loosen the three OU securing stand-off nutslocated on the Antenna (see Figure 6).2. Position the OU on the stand-off nuts throughthe three (3) key hole slots on the OU (seeFigure 7).3. Tighten the securing stand-off nuts.Figure 7. µµLink Outdoor Unit.Outdoor UnitMounting KeyholeSlots
862-01545 µLink System ManualIssue 1 Page 27Outdoor UnitPower Levels Follow these steps to set the transmitted power levelon the OU. Refer to table 4 for transmitted powerlevels.Step Action1. Determine the gain of the antenna, AT, to beinstalled with the OU.2. Calculate the transmitted power, PT, accordingto the following formula:PT = 30dBm – (AT – 6)/3 dBm3. Determine the power level to be used in NMSby consulting table 4.4. Install a fixed attenuator between the OU andthe antenna if the power level can not besufficiently reduced.5. Set the transmitted power level in NMS.6. Repeat for both stations.Example: Determining the transmitted power level.Step Action1. Install a 24dBi antenna.2. Transmitted power level to be used is:PT = 30 dBm – (24-6)/3 dBm = 30 dBm – 6 dBm = 24 dBm3. Power level 5 corresponds to 24 dBmtransmitted power (from table 4).4. Set the power level to level 5 in NMS.
µLink System Manual 862-01545Page 28 Issue 1bTable 4. Transmitted Power Level SettingNMS PowerLevel Setting Transmitted Power (dBm)1 202 213 224 235 246 257 26
862-01545 µLink System ManualIssue 1 Page 29Indoor UnitInstallation Follow these steps to install the IU. See Figure 8.Step Action5. Install the Data Interface module into the IUby sliding it in until the male connector on themodule mates firmly with the female connectorinside the IU.6. Secure the Data Interface module to the IUwith the two (2) x M4 screws provided.7. Slide the IU into the 19" rack and secure to therack using four (4) x M3 screws. Note that ifthe unit is to be table mounted, first fit the four(4) x rubber feet to each corner on the base ofthe IU.8. Earth the IU by connecting the earth cable orstrap between the station earth and the earthstud on the IU rear panel.9. Observing the polarity of the supply, wire upthe supplied power connector cable plug andconnect it to the facility DC supply (21 to56 V) through a minimum 10 A circuitbreaker. Secure the connector screws to theunit. Check the supply voltage using theMultimeter.ORConnect the AC power cable from the stationpower source to the AC power connector onthe rear panel of the IU.
µLink System Manual 862-01545Page 30 Issue 1bStep Action10. Make-off the 120Ω (E1)/100Ω (T1) - factoryset tributary input and output connections andconnect to the RJ-45 connector on the rearpanel of the IU. Alternatively, connect the75Ω (factory set) coaxial tributary connectionsto the BNC input and output connectors on theIU rear panel as required. See Appendix A atthe end of this chapter for the pin details of therelevant tributary connector type. Ensure thatall unused tributaries are disabled.11. Connect the 15-pin D-type Auxiliary I/OConnector (alarm interfaces) on the rear panelof the IU to the appropriate Krone block orother distribution rack (for further connectionto appropriate supervisory equipment asrequired). See Appendix A at the end of thischapter for pin details.12. Connect the Serial Data interface cable to theWayside connector on the IU rear panel.Figure 8. Indoor Unit Rear Panel.AC 3-pin PowerConnectorEarth StudDC PowerConnectorAuxiliary I/OConnectorWayside SerialTraffic DataConnectorOutdoor UnitCableConnectorRJ-45ConnectorData InterfaceModule BNCConnectors
862-01545 µLink System ManualIssue 1 Page 31InterconnectionCable Installation Follow these steps to install the IU / OUinterconnection cable.CAUTIONSDO NOT EXCEED THE RECOMMENDEDBENDING RADIUS OF THE CABLE, IE. 10 cm.DO NOT OVER TIGHTEN THE CABLE STRAPSON THE CABLE AND DO NOT FASTEN THEACTUAL STRAP LOCKING MECHANISM OFTHE CABLE STRAP ONTO THE CABLE.Step Action1. Connect the interconnection cable to theconnector on the base of the Outdoor Unit (seeFigure 9).2. Using cable ties or straps, secure the cable tothe pole at regular intervals.3. Connect the other end of the interconnectioncable to the Outdoor Unit connector on the IUrear panel (see Figure 8).4. Tighten the Outdoor Unit connector securingscrews on the IU rear panel.
µLink System Manual 862-01545Page 32 Issue 1bFigure 9. Outdoor Unit Mounted on Antenna.OutdoorUnitInterconnectionCableIU/OU CableConnector
862-01545 µLink System ManualIssue 1 Page 33SystemCommissioning After completing the physical installation of theIndoor Unit, Antenna and Outdoor Unit, and theInterconnection Cable, you need to commission theSystem. This procedure describes how to set up theminimum requirements for successful µLink Systemoperation.InformationRequired Before commissioning the system, you should knowthe proposed frequency band plan (Tx and Rx) foreach station, and the PN sequence for the link.CommissioningProcedure Setting-up ProcedurePerform the following steps at both stations:• Locate the far site and point the antenna to theantenna at the far site, as accurately as possible.• Switch the IU power ON.• Install and Access the µLink ManagementSoftware (refer to Chapter 4 of this manual).• Configure the radio channel as required.• Configure the Tx and Rx PN sequences.• Set the Tx power to maximum.Beaming-up1. Check the RSSI and BER levels.2. Align the antenna until the Maximum RSSI andminimum BER levels are attained.Set Critical Parameters1. Reduce the Tx power until an RSSI of between -65and -70 dBm is obtained. This is important toavoid interference to co-located systems.
µLink System Manual 862-01545Page 34 Issue 1bLink ErrorPerformance Test Perform a link error performance test as follows:1. Run data over the link for a period of 15 hours.2. Record the RSSI3. Record the BER4. Record the LED statusesRecord all results on a check list. See Table 5 for anexample.Table 5. Link Error Performance Check ListDescription Setting/Remarks1. Transmit Frequency/Channel2. Final RSSI3. Link Test BER4. LED Status
862-01545 µLink System ManualIssue 1 Page 35Appendix A to Chapter 2:µµLink External Connector Pin DetailsIndoor Unit Connector Pin DetailsE1 DATA (IU Rear Panel)8-pin RJ-45 Female Connector81Pin Details1E1 Tx Data (+)2E1 Tx Data (-)3E1 Rx Data (+)6E1 Rx Data (-)4, 5, 7, 8 Not UsedT1 DATA (IU Rear Panel)8-pin RJ-45 Female Connector81Pin Details1T1 Tx Data (+)2T1 Tx Data (-)3T1 Rx Data (+)6T1 Rx Data (-)4, 5, 7, 8 Not UsedWAYSIDE TERM (IU Rear Panel)9-pin D-type Female Connector1569Pin Details2Tx3Rx5Ground1, 4, 6, 7, 8, 9 Not Used
µLink System Manual 862-01545Page 36 Issue 1bIndoor Unit Connector Pin DetailsMONITOR (IU Front Panel)9-pin D-type Female Connector1569Pin Details2Tx3Rx5Ground1, 4, 6, 7, 8, 9 Not UsedAUX I/O (IU Rear Panel)15-pin High Density D-type FemaleConnector151115610Pin Details1Relay 1 Common2Relay 1 N.O3Relay 1 N.O4Relay 1 N.C5Relay 1 N.C6Relay 1 Common7Relay 2 Common8Relay 2 Common9Relay 2 N.O10 Relay 2 N.O11 Relay 2 N.C12 TTL Input 113 TTL Input 1 Return14 TTL Input 215 TTL Input 2 Return
862-01545 µLink System ManualIssue 1 Page 37Indoor Unit Connector Pin DetailsDC (IU Rear Panel)2-pin Wieland Polarised 8213 Type+-DCPin Description+Positive-NegativeOUTDOOR UNIT (IU Rear Panel)26-pin High Density D-type FemaleConnector1919261018Pin Details1Tx Data +2Tx Data -3Tx Data GND4Tx Clk +5Tx Clk -6Tx Clk GND7Rx Data +8Rx Data -9Rx Data GND10 Rx Clk +11 Rx Clk -12 Rx Clk GND13 Rx Cntrl +14 Rx Cntrl -15 Rx Cntrl GND16 Tx Cntrl +17 Tx Cntrl -18 Tx Cntrl GND19 +Vsupply20 +Vsupply21 - 25 GND
µLink System Manual 862-01545Page 38 Issue 1bOutdoor Unit Connector Pin DetailsCABLE CONNECTOR (OU Base)PRNMKLJCBDAEGFHXTUWVSaYZcbPin DetailsA24VB24VCTXC-DTXC+ETXDCLK-FRXDCLK+GTXDCLK+HN/CJRXDCLK+KRXD+LRXC-MRXD-NRXC+PTXD-RTXD+SGNDTGNDUGNDV GNDWGNDX GNDY GNDZGNDaGNDbGNDcGND
862-01545 µLink System ManualIssue 1 Page 39Chapter 3: Operational InformationIntroduction toChapter 3 Chapter 3 provides the user with a description and thelocation of all controls, indicators and connectorslocated on the front and rear panels of the µLinkIndoor Unit (IU).Indoor Unit (IU)Controls,Indicators andConnectorsFront PanelFigure 10 shows all items on the IU Front Panel.Table 6 describes the items shown in the illustration.
µLink System Manual 862-01545Page 40 Issue 1bFigure 10. IU Front Panel Controls, Indicators and Connectors.Near AlarmLEDsFar AlarmLEDsStatusLEDsMonitorConnector
862-01545 µLink System ManualIssue 1 Page 41Table 6. IU Front Panel: Controls, Indicators and ConnectorsItem DescriptionNear Alarm LEDs Used to indicate Failure, Service and Site alarmsor status. The LEDs are tri-colour to indicate NoAlarm (Green), Existing Alarm (Red) andHistoric Alarm (Amber) conditions. Refer toChapter 5, Maintenance Information for moredetails about these alarms.Far Alarm LEDs As for Near Alarm LEDs.Status LEDs The following status LEDs are located on the IUFront Panel:a. Power ONb. Tx Syncc. Rx Syncd. Loss of Signal (LOS)e. Alarm Indication Signal (AIS)The Power-ON LED is red. If LED is ON, itindicates Power-ON if OFF, it indicates Power Off.LEDs b to e are tri-coloured to indicate No Fault(Green), Existing Fault (Red) and Historic Fault(Amber) conditions. Refer to Table 7 for moreinformation about the Status LEDs.Monitor Connector RS-232 standard 9-pin D-type connector foroperation at a nominal 19200 baud. For use withthe Craft Terminal.
µLink System Manual 862-01545Page 42 Issue 1bTable 7. Status LEDs:LED Status RemarksPower On Off Power OffRed Power OnTx Sync Green Tx Data FramelockRed Loss of Tx Data FramelockAmber Historic Tx Sync Framelock LossRx Sync Green Rx Data FramelockRed Loss of Rx Data FramelockAmber Historic Rx Sync Framelock LossLOS Green Tx Data PresentRed No Tx Data DetectedAmber Historic LOSAIS Green AIS Not PresentRed AIS PresentAmber Historic AIS
862-01545 µLink System ManualIssue 1 Page 43Indoor Unit (IU)Controls,Indicators andConnectorsRear PanelFigure 11 shows all items on the IU Rear Panel.Table 8 describes the items shown in the illustration.Figure 11. IU Rear Panel Controls, Indicators and Connectors.AC 3-pin PowerConnectorData InterfaceModule Earth StudDC PowerConnectorAuxiliary I/OConnectorWayside TrafficSerial DataConnectorOutdoor UnitCableConnectorOn/OffSwitch
µLink System Manual 862-01545Page 44 Issue 1bTable 8. IU Rear Panel: Controls, Indicators and ConnectorsItem DescriptionOutdoor Unit CableConnector 26-pin, High Density D-type female connector forIU/OU interconnection cable.Wayside TrafficSerial DataConnector9-pin D-type female connector. Used for Waysidetraffic channels.DC Power Connector Weiland 2-way chassis mounted connector.Auxiliary I/OConnector 15-pin, High Density D-type female connector.Used mainly for diagnostics and maintenancepurposes. Divided into two main sections:• Plant Alarm Inputs• Equipment Control Relay Outputs.On/Off Switch Power switch to switch the IU On or Off.AC 3-pin PowerConnector Chassis mounted IEC AC Inlet. Accepts 100 VACto 240 VAC.Earth Stud Screw type terminal for earth connection.Payload DataInterface Connector The connector types depend on the type of DataInterface module installed. Available options are:E1 (120Ω/75Ω RJ-45/BNC), T1 (100Ω/75Ω RJ-45/BNC).
862-01545 µLink System ManualIssue 1 Page 45Chapter 4: µµLink Management SystemGeneralInformation The µLink Management Information System is asoftware tool for the management (installation,maintenance and support) of µLink digital radio links.The software runs on an IBM compatible PC runningWindows 95 (user supplied), connected to the IndoorUnit (IU) via a serial communications interface.It provides extensive management functions on siteand, via the microwave radio link, can be used toaccess any µLink station within a link domain.Hardware(supplied byCustomer)The hardware may be supplied by the customer. It istypically a laptop or notebook computer, and musthave the following minimum characteristics:• IBM PC compatible.• 486 processor, 25 MHz clock speed.• 16 Mbyte RAM• 120 Mbyte hard drive with Windows 95 installed.• 1.44 Mbyte stiffy drive.• Mouse or other pointing device.• 1 x RS-232 serial port (Com port). This is inaddition to the Com port that may be used by themouse.• SVGA monitor (minimum screen resolution of640 x 480).
µLink System Manual 862-01545Page 46 Issue 1bSoftware andHardware(supplied byTellumat)The software is the operator interface to the operationand control of the µLink System. It allows you toperform tasks such as; system configuration,controlling system parameters and accessing on-linehelp.It is supplied by Tellumat on one 1.44 Mbyte, 3.5 inchstiffy diskette. It is supplied as executable code,supported with installation and other supplementaryfiles.In addition to the software, Tellumat also supplies anRS232 interconnection cable for use between the IUand the PC interface. Refer to Appendix A at the endof Chapter 2 in this manual for pin details of this cableinterface (Monitor connector).Setting-up Follow these steps to set up the µLink ManagementInformation System for use with the µLink:Step Action1. Connect the supplied interface cable betweenthe RS-232 port on the rear of the computer,to the Monitor connector on the front panel ofthe Indoor Unit.2. Switch the computer On.3. Run the Windows operating system.4. Insert the application Software disk into theappropriate disk drive (A or B).5. In Windows 95, access the Control Panel andselect the Add/Remove Programs. From theInstall/Uninstall folder, select the Installbutton.
862-01545 µLink System ManualIssue 1 Page 47Step Action6. Insert the installation disk of the software intothe relevant drive (A or B) of the PC and thenselect Next. Run *\Setup. exe by selectingFinish(* being the drive identifier).7. Follow the screen prompts to install thesoftware onto the hard drive of the computer.Accessing theSoftware Program After installing the software, open the program byselecting the µLink option from the Program Group inthe Start Menu.Menu Structure The µLink Management Information Software is amenu driven program that provides you with agraphical interface of the µLink Station or Network.This interface allows you to select various options toconfigure, manage and interrogate the µLink System.After accessing the software program, the Main Screenis displayed (see Figure 12).
µLink System Manual 862-01545Page 48 Issue 1bFigure 12. µµLink Management Software: Typical Main Screen.Main Screen The Main Screen has the following three mainfunctional areas:• Pull-down Menus Area (see page 49)• Short-cut Buttons Area (see page 49)• Network Display Area (see page 50)Pull-downMenus Area Network DisplayAreaShort-cutButtons Area
862-01545 µLink System ManualIssue 1 Page 49Pull-down MenusAreaThe following pull-down menus are available from theMain Screen:File. This menu provides you with an exit option,which allows you to exit from the µLinkManagement Software.Tools. This menu provides the following options:• Options. This option allows you to selectthe µLink Management Software terminalserial port. You can select No Port,COM1, COM2, COM3 or COM4.• Local IU/Remote IU. These optionsallows you to view the details of theselected site.Help. This menu provides you with various helpfacilities.Short-cut ButtonsArea The following short-cut buttons are provided:Close. Allows you to exit from the µLinkManagement Information System.Options. As for Tools/Options (see Pull-down MenusArea).Help. As for Help/About (see Pull-down MenusArea).
µLink System Manual 862-01545Page 50 Issue 1bNetwork DisplayAreaThe Network Display Area of the Main Screenprovides a graphical display showing all themicrowave links in the domain.It provides the local and remote site station names andshows you the site to which the µLink ManagementSoftware is connected.To view the details of a particular site, simply click onthe required site. The Station Control screen for theselected site is displayed (see Figure 13).Figure 13. Typical Station Control Screen.
862-01545 µLink System ManualIssue 1 Page 51Station ControlScreen See Figure 13. This screen allows you access to thefollowing parameters:a. Indoor Unit• Configuration• Build State• Statusb. Outdoor Unit• Configuration• Build State• StatusAlso provided on the screen are status indicators forboth the IU and OU. These blocks are bi-coloured andindicate whether the unit is Online (Green) or Offline(Red).
µLink System Manual 862-01545Page 52 Issue 1bIndoor Unit:Configuration This screen allows you configure the following items(see Figure 14):• Wayside Port• Payload Data Interface Port• Bit Error Rate ThresholdsTo configure the ports, click on the requiredparameter(s).Configure the BER thresholds as required. Payload isfrom the user equipment to the IU Payload Dataconnector and RF Link is from Antenna to Antenna.Note that the thresholds must be entered in scientificnotation, eg. 1.0E-6. If the Minor or Major thresholdsare exceeded, it will trigger a Service Alarm fault. Ifthe Critical threshold is exceeded, it will trigger a Failalarm.When finished, click on the <Apply> button. Thistransmits the parameters to the selected IU.Figure 14. Indoor Unit: Typical Configuration Screen.
862-01545 µLink System ManualIssue 1 Page 53Indoor Unit: BuildState This screen (see Figure 15) allows you to view thebuild state details of the primary hardware andsoftware components of the IU. This information isread from the IU microprocessor.Figure 15. Indoor Unit: Typical Build State Screen.
µLink System Manual 862-01545Page 54 Issue 1bIndoor Unit: Status This screen (see Figure 16) allows you to monitor thenetwork’s performance. It provides the following data:• Status of the Near and Far site Fail, Site andService alarms.• Status of the Rx Sync, Tx Sync, LOS and AISalarm LEDs.• Transceiver Error Counts for Code Violation,CRC4 and FAS.• Bit Error Rate and Total Blocks of payload datatransmitted.If you want to clear the LEDs, simply click on the<Clear LEDs> button.If you want to clear the Error Counts, simply click onthe <Clear Counts> button.You can see more details of the Fail, Site and Servicealarms by clicking on the respective highlit button.This initiates the selected site IU Detailed alarm screens(see Figure 17, Figure 18 or Figure 19 respectively).Figure 16. Indoor Unit: Typical Status Screen.
862-01545 µLink System ManualIssue 1 Page 55Indoor Unit:Failure AlarmDetailsThis screen (see Figure 17) provides more detailedinformation of the Near and Far site Fail alarms.The specific cause of the error is shown by a tick in theadjacent check box of the suspected error.Refer to Chapter 5 of this manual to fault-find thefailure alarm.Figure 17. Indoor Unit: Typical Failure Alarm Details Screen.
µLink System Manual 862-01545Page 56 Issue 1bIndoor Unit: SiteAlarms andControlThis screen (see Figure 18) provides more detailedinformation of the selected sites Site alarms. It alsoallows you to test alarm relays.The specific cause(s) of the site alarm is shown by atick in the adjacent check box of the alarm.To trigger (test) a relay, click in the relevant Controlcheckbox and the click on the <Apply> button. Theselected relay will be triggered.Figure 18. Indoor Unit: Typical Site Alarms and Control Screen.
862-01545 µLink System ManualIssue 1 Page 57Indoor Unit:Service AlarmsThis screen (see Figure 19) provides more detailedinformation of the selected site’s Service alarms.The specific cause(s) of the alarm is shown by a tick inthe adjacent check box of the listed BER warnings.Refer to Chapter 5 of this manual to fault-find theService alarm.Figure 19. Indoor Unit: Typical Service Alarm Details Screen.
µLink System Manual 862-01545Page 58 Issue 1bOutdoor Unit:Configuration This screen allows you configure the followingDefault and Current OU parameters (see Figure 20):Figure 20. Outdoor Unit: Typical Configuration Screen.
862-01545 µLink System ManualIssue 1 Page 59Default andCurrentParametersThe following parameters can be configured forDefault and Current settings:• Transmit Channel. Channel 0 to 11 (seeFrequency Band Plan on page 19 of this manual).• Receive Channel. Channel 0 to 11 (seeFrequency Band Plan on page 19 of this manual).We recommend that transmit and receive channelsbe set at least three channels apart.• Transmit Power. 1 to 10. 1 being the minimumpower level (17 dBm) and 10 being the maximumpower level (26 dBm).• PN Code. A number between 0 and 999. Foroptimal performance this should be “237” (Barkercode for an 11 bit PN sequence).• Redundancy (A or B). If the hardwareconfiguration allows (ie. equal gain antennas andstandard power system), the transmit and receivepaths can be swapped. This changes the effectivepolarisation’s of the Tx and Rx signals and can beused to counteract multipath effects. Dualredundancy can also be used in the event of a RFtransceiver failure.To configure and program the default parameters, setthe required parameters and then click on the<Default> button.To configure and program the current parameters, setthe required parameters and then click on the<Current> button.To configure and program the default and currentparameters, set the required parameters and then clickon the <Send All> button.If the parameters sent to the OU are valid, the relevantValid check boxes will be ticked.
µLink System Manual 862-01545Page 60 Issue 1bOutdoor Unit:Build State This screen allows you to view the following buildstate details of the primary hardware and softwarecomponents of the OU (see Figure 21). Thisinformation is read from the OU microprocessor.Figure 21. Outdoor Unit: Typical Build State Screen.
862-01545 µLink System ManualIssue 1 Page 61Outdoor Unit:Status This screen allows you to view the following OU statusinformation (see Figure 22):• Last Restart• Carrier Detect Present (Y/N)• Received Signal Strength Indication (RSSI) indBm.• RSSI bar graphFigure 22. Outdoor Unit: Typical Status Screen.
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862-01545 µLink System ManualIssue 1 Page 63Chapter 5: Maintenance InformationIntroduction toChapter 5 Chapter 5 provides the technical personnel with theinformation necessary to diagnose and repair (byreplacement) a fault on the µLink System.Recommissioning information for the µLink is alsoprovided to ensure that the system is functioningcorrectly after repair or replacement of the LRU/SRU.Fault Diagnosis To ensure the minimum down-time of the µLinkSystem, fault diagnosis is divided into two distinctcategories:• Diagnosing the most likely faulty site (Near orFar).• Diagnosing the faulty LRU at the site, ie. IndoorUnit, Outdoor Unit, Antenna or InterconnectionCable.Information to follow
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862-01545 µLink System ManualIssue 1 Page 65Chapter 6: Functional DescriptionIntroduction toChapter 6 Chapter 6 provides a detailed description of the µLinkSystem as well as a brief description of the LineReplaceable Units (LRUs) comprising the system.This chapter is aimed at providing the servicetechnician with an understanding of the function andoperation of the µLink System.µµLink SystemDescription The µLink System is a Direct Sequence SpreadSpectrum Digital Radio operating in the 2.4 GHz ISMfrequency band. Various payload data interfaces canbe installed, ie. T1 and E1. The µLink system can beextended to include other frequency bands merely byusing a different microwave transceiver in the OutdoorUnit (OU). The Indoor Unit (IU) is not dependent onthe frequency band used.A µLink Radio Relay Station comprises a single IU, anOU (with integral antenna), interconnected by a customcable. On-site management and maintenance is achievedby using a Craft Terminal that interfaces to the IU.A radio relay link consists of a complementary pair ofµLink stations. It is possible to extend range bylinking further station pairs in a multiple hopconfiguration.The following options may be added to a µLinkDigital Radio System:• Local area network for networking of multipleradio relay stations.• IP routers, bridges, and gateways for networking tothe Telecommunications Network Management(TNM) system.
µLink System Manual 862-01545Page 66 Issue 1bIndoor UnitInformation to Follow
862-01545 µLink System ManualIssue 1 Page 67Chapter 7: Parts ListIntroduction toChapter 7 Chapter 7 identifies, lists and describes all systemlevel user replaceable parts and componentscomprising the µLink System. Part numbers for re-ordering purposes are also provided.Parts Lists The columns in the parts lists provide the followinginformation:• Item: Indicates the annotation number referenced in the associated parts listillustration in Figure 23.• Part No.: Gives the Tellumat part number for the specific item.• Description: Provides a brief description of the item.• Qty. States the quantity of the item used per Indoor Unit.• Remarks: Provides any useful supplementary information.Figure 23 shows the user replaceable parts andcomponents at the system level. Table 9 shows theactual parts list.
µLink System Manual 862-01545Page 68 Issue 1bFigure 23. µµLink System.132546
862-01545 µLink System ManualIssue 1 Page 69Table 9. µµLink System Level Parts ListItem PartNumber Description Qty. Remarks1651-03531 Antenna (18dBi Tx/18dBi Rxgain) 12651-03586 Outdoor Unit (E1 HB) 1See Note 12651-03587 Outdoor Unit (E1 LB) 1See Note 12651-03592 Outdoor Unit (T1 HB) 1See Note 12651-03593 Outdoor Unit (T1 LB) 1See Note 12651-03584 Outdoor Unit (E1 DiplexerHB) 1See Note 12651-03585 Outdoor Unit (E1 Diplexer LB) 1See Note 12651-03590 Outdoor Unit (T1 DiplexerHB) 1See Note 12651-03591 Outdoor Unit (T1 Diplexer LB) 1See Note 13651-03594 Antenna Mounting Bracket Set 14660-03152 IU/OU Interconnection Cable(10m) 14660-03531 IU/OU Interconnection Cable(20m) 14660-03150 IU/OU Interconnection Cable(50m) 14660-03149 IU/OU Interconnection Cable(75m) 15651-03533 Indoor Unit6651-03526 E1 Interface Card See Note 26651-03527 T1 Interface Card See Note 2Note 1: Check that Outdoor Units are ordered as a matched pair andensure that they are of a complimentary type, ie. low band (LB)or high band (HB) types at opposite ends of the link.Note 2: Only one interface card (E1 OR T1) is installed in the IndoorUnit.
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