Meteorcomm 63010 Wayside Packet Data Transceiver User Manual Draft 7
Meteorcomm LLC Wayside Packet Data Transceiver Users Manual Draft 7
Contents
- 1. Users Manual Draft 7
- 2. Users Manual
Users Manual Draft 7
ITCRWaysideRadio
User'sManualandInstallation
Instructions
ApplicableModel:63010
Note:ThefinalversionofthismanualwillincludeaFrench
translationofthenoticestouserinSections2and3.
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RevisionHistory
RevisionDateSummaryofChangesContributor
0.1Initialdraft.JeffLawrence
0.2ChangesbyJeffLawrenceJeffLawrence
0.308/29/2011AddedNoticestouser,renamed
andeditedforFCCsubmission
FredCleveland
0.409/08/2011Fixederrorsandomissions.FredCleveland
0.510/04/2011Expandedandeditedinresponse
toexaminercomments.
FredCleveland
0.610/06/2011Correctedvoltages.FredCleveland
TimBlom
0.710/20/2011RevisedSection2.2,3.3and5.4FredCleveland
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TableofContents
1.Overview.............................................................................................................................3
1.1ApplicableRadioModelsandIdentifiers................................................................3
1.2GeneralDescription................................................................................................3
1.3Chassis.....................................................................................................................4
1.4PortsandEthernetConnectors..............................................................................4
1.5PowerConnectors...................................................................................................4
1.6AntennaConnectors...............................................................................................4
2.ImportantInformationfortheUser...................................................................................4
2.1TransmitterWarm‐UpPeriod.................................................................................4
2.2LimitingRFExposure...............................................................................................5
2.3AntennaGuidelines.................................................................................................5
2.4RFInterferencetoResidentialReceivers(Part15).................................................6
2.5EquipmentModifications.......................................................................................7
3.WaysideTransmitterOperation.........................................................................................7
3.1WaysideChannelizationandFrequencyRange......................................................7
3.2WaysideChannelRestrictions................................................................................7
3.3WaysideRadiatedPowerLimits.............................................................................8
4.SetupandConfigurationfortheWaysideRadio................................................................9
4.1PowerSupply..........................................................................................................9
4.2EthernetConnection.............................................................................................10
4.3RFOutputTermination.........................................................................................10
5.TuningtheWaysideRadio................................................................................................11
5.1EquipmentRequired.............................................................................................11
5.2SetuptheRadioforTesting..................................................................................11
5.3MeasureandCalibrateReferenceCrystalOscillatorFrequency..........................12
5.4MeasureandAdjustOutputPower......................................................................13
5.5CheckandAdjustRFOutputChannel...................................................................14
6.Operations........................................................................................................................15
6.1RestoreFactorySettings.......................................................................................15
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6.2DisplaySoftwareandFirmwareRevisionNumbers..............................................15
6.3DisplayRadioIdentificationInformation..............................................................15
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1. Overview
Thisdocumentprovidesinformationrequiredfortheoperationandverificationof
theMeteorcommInteroperableTrainControlRadioNetwork(ITCR)Waysideradios.
1.1 ApplicableRadioModelsandIdentifiers
ThisdocumentappliestotheWaysideradiomodellistedbelowalongwithits
regulatoryidentifiers.
Model:63010
FCCID:BIB63010
IC:1300A‐63010
1.2 GeneralDescription
TheWaysideradioisdesignedtosatisfytheindustrystandardPositiveTrainControl
(PTC)requirementsaspartofanintegrated220MHzradionetwork.TheBaseradio,
Locomotiveradio,andWaysideradioformthetransportationbackboneonwhicha
messagingapplicationprovidescommunicationcapabilitiesbetweenrailroadassets
andtheirbackoffices.TheITCRisdesignedtoprovidecommunicationinaninter‐
operablefashionenablingmessagingtooccuracrossrailroadboundaries.
Whenappliedasamobilestation,thisradiowillbemountedinmobilemaintenance
vehiclessuchaspickuptrucks.ItwillactivelyjointheITCnetworkonlywhen
maintenancevehiclesaredrivenontherails.
TheWaysideradioisnormallypositionedonrailroadpropertyinanequipmentbox
orbungalowclosetotheactiverails.Whenusedasawaysidestation,itsmissionis
toprovidewirelesstransmissionoflocaltrackandtracksideequipmentwhereitis
mounted.Itsradiomessagesareactivelymonitoredbylocomotivesinthevicinity
thatmaybeheadedinitsdirection.Italsonormallyassociateswithanearbybase
station.Thebasestationbackhaulsthewaysidetransmissionforvariousmonitoring
andcontrolpurposesattherailroadcentraloffice.Itisnormallyinterfacedtoa
WaysideInterfaceUnit(WIU)viaitsLANethernetport.TheWIUterminatesalllocal
waysideequipmentsuchasswitches,signals,trackcontinuitycircuitsandseveral
otherpossibletrackconditionindicators.TheWIUformatsthestatusinformation
intoashortmessagecalledanaspect.TheaspectissenttotheWaysideradiofor
packetizedRFtransmission.
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1.3 Chassis
Waysideradiosarehousedinelectricallysealedmetalcases.TheWaysideradio
dimensionsareapproximately15.5WX9.5HX2.0D.Itweighslessthan8lbs.
Allinput/outputportsaregroundedand/orshielded.Inaddition,bestengineering
practiceshavebeenemployedwithrespecttointernalshielding,unitassemblyand
PCBdesigninanefforttominimizepotentialsourcesofunwantedradiated
emissions.
1.4 PortsandEthernetConnectors
TheWaysideradiohastwoRJ45EthernetI/Oports,markedLANandMAINT,each
onitsownnetwork.
1.5 PowerConnectors
TheWaysideradiopowerinputconnectorisaWagotypefor13.6VDCnominal,min
10.9VDCandmax15.5VDC.
1.6 AntennaConnectors
The30WPEPrated220‐222MHzwaysideradiotransmitterhasanN‐typeantenna
connectorandexpectsanominal50ohmresistiveload,maxVSWR3:1.Italsohasa
TNCconnectorfortheGPSantenna.TheGPSantennacanbeactive(3.3Vdc,50mA
max)orpassive.
2. ImportantInformationfortheUser
2.1 TransmitterWarm‐UpPeriod.
Thewaysidetransmitterusesatemperaturecompensatedcrystaloscillator(TCXO)
toachievefrequencyaccuracyandstability.Nowarm‐upperiodisrequiredbeyond
thebuilt‐inradiostartupdelays.
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2.2 LimitingRFExposure
PleaserefertotheRFEnergyExposureGuidepackedwitheachradiofor
specificinformationregardingsafedistancesthatmustbemaintained
betweenpersonnelandenergizedtransmittingantennas.
TheinformationintheRFEnergyExposureGuideisdeterminedfromFCCand
IndustryCanadarulesthatwhenfollowed,limithumanexposuretoradiofrequency
energytoacceptablelevels.NotethattheRFEnergyExposureGuidecalculatesthe
largerlateralsafedistancesforanuncontrolledenvironment.Obeyingtheselimits
willprotectbothrailroademployeesandthegeneralpublic.
Thisradioisintendedforusebyrailroademployeeswhohavefullknowledgeof
theirexposureandcanexercisecontrolovertheirexposuretomeetFCCandIC
limits.Thisradiodeviceisnotintendedforusebyconsumersorthegeneral
population.
Thistransmitterisintendedtobeoperatedwithafixedormobileantennainan
Occupational/ControlledExposureenvironmentperFCCOET65orControlledUse
EnvironmentperICRSS‐102.MaximumPermittedExposure(MPE)limitfordevices
inthepresenceofthegeneralpublicinthe100‐300MHzrangeis0.2mW/cm
2
=2
W/m
2
.
ThetablesintheRFEnergyExposureGuidelistthecalculatedlateraldistancestobe
maintainedbetweenthegeneralpublicandanoperationalWaysidetransmitter
antennafortwoantennatypesandgainsandforbothfixedandmobileapplications.
Thetransmitterpowerisadjustabletoaccommodatethevariousinstallationsofthis
product.OncetheauthorizedERP,antennagainandthelossesfromfeedline,
connectorsandanyinlineRFfiltersareknown,thetransmitterpowermustbe
evaluatedandifnecessary,settoavaluethatwillensurethattheauthorizedERP
andRFexposurerequirementsaremet.ExampleERPcalculationsareprovided
furtherbelow.
2.3 AntennaGuidelines
Thissectioncontainsantennainformationandadditionalnotesregardingmethods
tolimitRFexposure.
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Thelicenseeisrequiredtocomplywithlimitsonantennalocation,powerand
effectiveantennaheightper47CFRSubpartT§90.701et.seq.,orIndustry
CanadaSRSP‐512§6.3asapplicable.
Installantennasinaccordancewiththemanufacturer’sinstructions.
Disablethetransmitterwheninstallingorservicingitsantennaortransmission
line.
RefertotheRFEnergyExposureGuideforspecificguidelinesregardingthe
sitingandinstallationofmobileandfixedantennas.
AcceptablemobileandfixedantennatypesarelistedinthetablesintheRF
EnergyExposureGuide.
Unauthorizedantennas,equipmentmodificationsorattachmentscould
invalidateanyequipmentwarrantyorauthoritytotransmit.Modificationcould
damagetheradioandmayviolateFCCorICregulations.ContactMeteorcomm
beforeusingotherantennas.
Maintainasafedistancefromenergizedtransmittingantennas.Seeabove.
2.4 RFInterferencetoResidentialReceivers(Part15)
NOTICETOUSER:Thisdevicecomplieswithpart15oftheFCCRules.Operationis
subjecttotheconditionthatthisdevicedoesnotcauseharmfulinterference.
NOTE:Thisequipmenthasbeentestedandfoundtocomplywiththelimitsfora
ClassBdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsare
designedtoprovidereasonableprotectionagainstharmfulinterferenceina
residentialinstallation.Thisequipmentgeneratesandcanradiateradiofrequency
energyand,ifnotinstalledandusedinaccordancewiththeinstructions,maycause
harmfulinterferencetoradiocommunications.However,thereisnoguaranteethat
interferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescause
harmfulinterferencetoradioortelevisionreception,whichcanbedeterminedby
turningtheequipmentoffandon,theuserisencouragedtotrytocorrectthe
interferencebyoneormorethefollowingmeasures:
Reorientorrelocationthereceivingantenna.
Increasetheseparationbetweentheequipmentandreceiver.
Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhich
thereceiverisconnected.
Consultthedealeroranexperiencedradio/TVtechnicianforhelp.
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2.5 EquipmentModifications
Caution:Anychangesormodificationstothisequipmentnot
expresslyapprovedbythepartyresponsibleforcompliance(in
therespectivecountryofuse)couldvoidtheuser’sauthorityto
operatetheequipment.
3. WaysideTransmitterOperation
Itistheresponsibilityofthelicenseetooperatethisradiotransmitterincompliance
withFCCandIndustryCanadaservicerulesfor220‐222MHz,namelyFCCRulesPart
90SubpartTandIndustryCanadaSRSP‐512.
3.1 WaysideChannelizationandFrequencyRange
TheWaysideradiocanbeconfiguredtotransmitonanyoneof80selectable25‐kHz
spacedchannelsrangingfrom220.0125to221.9875MHzinclusive.Thespectrum
includedcorrespondstoall5kHzwideFCCchannelsnumberedfrom1at220.0025
MHzto400at221.9975MHz.EachwaysidetransmissionoccupiesfiveoftheFCC‐
defined5kHzchannels.ThelowestWaysideradiochannelcenterfrequencyisinthe
centerofFCCchannel3andthenextisFCCchannel8,then13,18,etc.,uptothe
highestinthecenterofchannel398.
3.2 WaysideChannelRestrictions
Section90.715oftheFCCRulesliststheauthorizedfrequenciesofthe400total5
kHz‐widechannels.Accordingto§90.733(d)thesecanbeaggregatedintolarger
channelwidthswiththeexceptionofFCCchannels161‐170and181‐185.
Therefore,thewaysideradiomaynottransmitonthosechannelsortheir221MHz
counterparts,361‐370and381‐385.Thiscorrespondstowaysidefrequencies,
220.8125,220.8375,220.9125,221.8125,221.8375,and221.9125MHz.
PleaserefertoPart90SubpartTandSRSP‐512foradditionalfrequencyuse
restrictionsinCanadianandMexicanborderareas.
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3.3 WaysideRadiatedPowerLimits
Itistheresponsibilityofthelicenseetocomplywiththeeffective
radiatedpowerlimitsbasedonoperatingfrequency,geographiclocation,
andeffectiveantennaheightsetoutin47CFRSubpartT§90.701et.seq.,
orIndustryCanadaSRSP‐512§6.3,asapplicable.
Important:Thefollowingsupplementaryantennasysteminformationdiscusses
meansforthelicenseetodetermineeffectiveradiatedpower(ERP)andcomplywith
regulatorypowerlimits.
Licenseesmustcomplywiththespecificpowerandantennaheightlimitationsfor
fixed‐antennastationsper§90.729orSRSP‐512§6.3.NotethatU.S.andCanadian
powerlimitsvs.HAATarenotidentical.
Licenseesshouldnotethatallmobilesandalsofixedinstallationstransmitting
between221and222MHzmustlimiteffectiveradiatedpower(ERP)to50Wor
10*log(50)+30=47dBmPEPreferencedtothe2.15dBigainofadipole,unless
operatingunderawaiverofFCCrule§90.729(b)orSRSP‐512§6.3asapplicable.The
EIRPforthiscaseis49.15dBm.AlsonotethatthemaximumERPonFCC/ICchannels
196‐200at220.975to221.000MHzis2watts.
TheallowabletransmitterpeakenvelopepoweroutputindBmisdeterminedby
subtractingtheantennagainindBifrom49.15,thenaddingthelossfromthe
antennafeedlineandconnectors.Iftheresultisgreaterthanorequalto44.85dBm
=14.85dBWthenthemaximumpoweroutputoftheWaysidetransmittercanbe
used.Ifthevalueislessthan44.85dBm,thenthetransmitteroutputpowermustbe
reducedtothecalculatedvalue.
MobileInstallation:Asanexampleofamobileinstallation,consideraverticalhalf
wavegroundplaneonavehiclemetalrooftop.Inanidealinstallationtheantenna
gain=2.4dBd=4.55dBi.Ignoringconnectorlosses,feedlinelossisatleast0.6dB
for10feetofTimesMicrowaveLMR‐195UltraFlexcoaxialcable.Transmitterpower
outputlimit=47‐2.4+0.6=45.2dBmPEPandthereforethesystemiscompliantwith
the50WERPlimit.TheactualERPinthiscaseis10^(14.85+2.4‐0.6)=46.2W.This
installationisnotallowedtotransmitonFCCchannels196‐200becausethe
maximumERPisgreaterthan2watts.
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FixedInstallation:Inafixedinstallation,acommonsingle‐elementexposedfolded
dipoleantennawithoutreflectorhas0upto2.9dBd(2.1to5.0dBi)azimuthalgain
dependingonthedesign.
OncetheallowableERPisdeterminedbyapplyingallpower‐restrictiverulesfrom
aboveandtheantennagainisknown,thetransmitterpeakenvelopepoweroutput
feedingthetransmissionlineisdeterminedbysubtractingtheantennagainindBd
fromtheERPandaddingthelossfromtheantennafeedlineandconnectorsplusthe
lossfromanyexternalinlinepowersensors,combiners,filtersorlightningarresters.
Ifthenetvalueisgreaterthanorequalto44.85dBm,thenthemaximumpowerof
theWaysidetransmittercanbeused.Ifthevalueislessthan44.85dBm,thenthe
transmitteroutputpowermustbereducedtothenetvalue.
Exampleforthe50WERPfixedcase:Antennagain=2.9dBdandfeedlinelossisat
least0.5dBfor25feetofTimesMicrowaveLMR‐400coaxplus0.4dBforinline
lightningarresterandthreeconnectors.Assumingnootherlosses,thetransmitter
poweroutputlimit=47‐2.9+0.9=45dBmPEP.Inthiscase,theactualWaysideERP
is44.85+2.9‐0.9dBm=46.85dBm=48.4WPEPandthereforethesystemis
compliantwiththe50WERPlimit.ThisinstallationisnotallowedtotransmitonFCC
channels196‐200becausethemaximumERPisgreaterthan2watts.
4. SetupandConfigurationfortheWaysideRadio
Setupphysicalconnectionswiththefollowing:
DCPower
Ethernet
RFoutputtermination
Thesectionsbelowidentifyeachofthephysicalconnections.
4.1 PowerSupply
Waysideradiosoperateat13.6Vdcinput.Table1describesthepowersupply
requirements.
Caution:ApplyinganincorrectvoltagetoaWaysideradiocancause
damage.Confirmthevoltageoftheradioandthepowersupplybefore
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applyingpower.
Table1WaysideRadioPowerParameters
ParameterWaysideRadio
NominalDCPowerInputVoltage13.6Vdc
OperationalRange10.9‐15.5Vdc(+14%/‐20%)
Damagelimit17Vdc
CurrentDrain(whiletransmitting
ratedpower)
10Amaxwhiletransmittinginto50ohm
load
4.2 EthernetConnection
WaysideradiosuseastandardCAT5EthernetcableconnectedbetweenaPCand
themaintenanceportoftheradio.ConfigurethePCnetworkcardwithafixedIP
addressof10.10.1.254.
YouwilluseXtermW,aMeteorcommterminalemulationprogram,toconnectwith
andcontroltheradioviacommandsissuedatcommandprompts.
4.3 RFOutputTermination
TheWaysideradioisratedfor30WPEP.Sufficientterminationisrequiredtoprotect
testequipment.Fortransmitterandreceivertesting,connectthetestequipmentto
theportlabeled“ANT”.Seefurtherinstructionsbelow.
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5. TuningtheWaysideRadio
Therearethreeparameterstotestandpotentiallytunebefore/duringRFtesting:
Masterreferencecrystaloscillatorfrequency
RFoutputpower
RFoutputchannel
FactorytechnicianstunethemasterreferencecrystaloscillatorandsettheRFgain
formaximumratedoutputpower.Youmayhavetoadjustthethreeparameters
beforeorduringRFtestingbyenteringcommandsusingXtermWoranother
terminalemulationprogram.
5.1 EquipmentRequired
1. 10ADCpowersupplyatratedvoltageofwaysideradio,nominally13.6VDC.
2. PersonalcomputerwithEthernetnetworkadapterandMeteorcommXtermW
orequivalentterminalprograminstalled.
3. 30dB50WRFpowerattenuator.
4. Vectorspectrumanalyzerforpowerandfrequencymeasurements.
5. Optional8+digitfrequencycounterforfrequencymeasurements.
6. Highstabilitytimebaseaccurateto0.1ppm.Canbeinternaltoitems4and5.
5.2 SetuptheRadioforTesting
1. Adjusta10ADCpowersupplyto13.6VDCandthendisableitsoutput.
Observingpolarityofthepowersupplyterminals,connectthewaysidepower
cablebetweentheradiopowerconnectorandthepowersupply.
2. ConnectoneendofaCAT5ethernetcabletotheRJ‐45radioportlabeled
MAINT.Connecttheotherendtoacomputernetworkcard.Thedefaultradio
IPaddressis10.10.1.254.SettheIPaddressofthecomputernetworkcardtoa
compatiblefixedaddresssuchas10.10.1.1.Thecomputershouldhave
MeteorcommXtermWorasimilarterminalemulationprograminstalled.
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3. Applypowertotheradio.Wait30secondstoopenanXtermWsession.Use
theEdit/ConfigurePortwindowtosetPortType=TCP/IP,Protocol=Stream,
TCP/IPSettingsHost=10.10.1.254,Port4000.SelectDeviceType=MCC6100
SDR(whichalsoappliestoITCradios).ReturnCharacter=CR,DataFormat=
ASCII.
4. Attacha50W30dBRFattenuatortotheTX/RX1N‐typeantennaconnector.
Attachan(e.g.,AgilentMXAorPXA)vectorspectrumanalyzerorsimilartothe
transmitterportforpowerandfrequencymeasurements.TheVSAshould
containeitheraprecisionstabilityreferenceoscillatororattachanexternal
rubidiumreferencetotheVSAexternalreferenceinput.
5.3 MeasureandCalibrateReferenceCrystalOscillatorFrequency
Theinstructionsbelowallowyoutochangethefactorycalibrationsettingsforthe
masterreferenceoscillatorcrystal.
Tocheckthemasterreferencecrystaloscillatorfrequencycalibration:
1. OpenanXtermWsession.
2. Puttheradiointotestmodebytyping:
dsp,watchdog,off
dsp_mode,test
3. Reduceoutputpowertoapproximately2Wbytyping:
cal,set,ddslevel, 100
4. Begintransmittingatesttonedirectlyonthecarrierfrequency:
l1_test,stop
l1_test,set,txmod,cw
l1_test,set,txfreq,220012500
l1_test,start,tx
5. UsethefrequencycounterorfrequencycountingmarkerontheVSAto
measuretheoutputfrequency.Themeasuredvalueistheactualcarrier
frequency.Thecarrierfrequencyisnormallywellwithin352Hz(1.5ppm)ofthe
centerfrequencyofthechannel.
6. Alternatetothetesttone:Substitutethefollowingπ/4‐DQPSKmodulation
commandforthesecondlineinstep4.
l1_test,set,txmod,dqpsk_half
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7. SettheVSAtothecenterfrequencyofthechannelandsetittodemodulatethe
8ksym/secondπ/4‐DQPSKemissionandmeasuretheerrorfrequencywhichis
referencedtotheVSAcenterfrequency.
Toadjustthemastercrystalreferenceoscillatorparameters:
1. First,checkthefactorydefaultsettingforthecrystalreferenceparameterby
typing
cal
2. Notethevaluefor“xo”inthecalfactorstablethatisdisplayed.
3. AttheXtermWcommandline,type:
cal,set,xo,xx
wherexxissomevalueclosetotheoriginalfactorysetvalue.
4. Usetrialanderrortodeterminethesetpointforthexovaluetoachievethe
desiredcarrierfrequencyaccuracy.
ToresettheXOtuningparametertothefactorysetting:
Powercycletheradio.
5.4 MeasureandAdjustOutputPower
Caution:Avoidunnecessaryadjustments.Exercisecautionwhensetting
ddslevelorotherpoweroutputcontrolsasdamagetotheradiocanoccur
iftheyaresettoohigh.
Thewaysideradioisratedfor30WPEP.Toachievethispowerradiosarepre‐
calibratedatthefactory.Ifadditionaltuningisrequired,useanappropriatemethod
tomeasurePEPforaπ/4‐DQPSKsignalandslowlyincrease/decreaseddslevellevel
fromitsnominalsetpoint,asdeterminedbyissuingthecommand‘cal’.
Tomeasureandadjustoutputpower:
1.AttheXtermWcommandline,begintransmittingaπ/4‐DQPSKsignalby
typing:
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l1_test,stop
l1_test,set,txmod,dqpsk_half
l1_test,start,tx
2.Viewthecalibrationsettingsbytyping:
cal
3.Observethevalueforddslevel.
4. TunetheVSAtothecenterofthechannelfrequencyandselecttheCCDF
functiontomeasurethepeak(envelope)power,averagepowerandpeaktoaverage
ratio.NotethatthepeakenvelopepowerisusedfordeterminingERP.
5.Thepowercanbemodifiedbytyping:
l1_test,stop
cal,set,ddslevel,xxx
l1_test,start,tx
Whilemonitoringtheoutputpower,thevaluexxxshouldbeincreasedasmall
amounttoincreaseoutputpowerorviceversa.
5.5 CheckandAdjustRFOutputChannel
YoucanadjusttheRFoutputchannelbystoppingtransmission,settingtransmission
frequency,andthenstartingtransmissionagain.
ToadjustRFoutputchannel:
1. Tunetheradiotothebottomchannel(220.0125MHz)bytyping:
l1_test,stop
l1_test,set,txfreq,220012500
l1_test,start,tx
2.Tunetheradiotothemid‐channel(221.0125MHz)bytyping:
l1_test,stop,
l1_test,set,txfreq,221012500
l1_test,start,tx
3.Tunetheradiotothehighchannel(221.9875MHz)bytyping:
l1_test,stop
l1_test,set,txfreq,221987500
l1_test,start,tx
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6. Operations
6.1 RestoreFactorySettings
Torestorefactorysettingswithoutcyclingtheradio:
AttheXtermWcommandprompt,type:
factory
6.2 DisplaySoftwareandFirmwareRevisionNumbers
Todisplaywhatsoftwareandfirmwareversionsareinstalledonyourradio:
AttheXtermWcommandprompt,type:
rev
6.3 DisplayRadioIdentificationInformation
Thissectionprovidesyouwithcommandstodisplayserialnumberandidentification
information.
Todisplayserialnumberinformation:
AttheXtermWcommandprompt,type:
serialnumber
ToshowcurrentIDsetting:
AttheXtermWcommandprompt,type:
ID