SIST EN 301 785 V1.1.1:2003
(Main)Fixed Radio Systems; Point-to-point equipment; Parameters for packet data radio systems for transmission of digital signals operating in the frequency range 23, 26, 28 or 38 GHz
General Information
- Abstract
Define parameters for 10BaseT and 100BaseT baseband systems representing 10 Mbit/s and 100 Mbit/s capacities.
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
Overview
SIST EN 301 785 V1.1.1:2003 outlines the minimum performance parameters for terrestrial fixed radio systems designed for point-to-point packet data transmission. Covering systems that operate in the 23, 26, 28, or 38 GHz frequency bands, the standard is specifically tailored for digital packet data radio equipment supporting Ethernet physical interfaces at 10 Mbit/s (10BaseT) and 100 Mbit/s (100BaseT) rates. Developed by the Slovenian Institute for Standardization (SIST), this standard is harmonized with EN 301 785 and aligns with European telecommunications requirements for high-frequency, high-capacity wireless backhaul links.
Key Topics
- Frequency Range: Applies to packet radio systems operating in the 23, 26, 28, and 38 GHz frequency bands, targeting local and regional network links.
- Transmission Capacity: Supports fixed radio equipment with baseband Ethernet interfaces at 10 Mbit/s and 100 Mbit/s, ensuring compatibility with widely used 10BaseT and 100BaseT standards.
- Channel Arrangements: Specifies channel configurations and spacings compatible with recognized European channel plans and regulatory guidelines.
- Performance Parameters: Covers radio frequency (RF) characteristics, transmitter and receiver requirements, electromagnetic compatibility (EMC), system availability, and environmental conditions for both indoor and outdoor deployment.
- Interoperability: Focuses on ensuring system compatibility along point-to-point routes, allowing flexible deployment, polarization options, and reliable operation under diverse environmental conditions.
- Regulatory Compliance: Aligns with relevant ETSI, CEPT, ITU, and IEEE standards for channel arrangements, spectral masks, and EMC to facilitate compliance and licensing.
Applications
Fixed radio point-to-point equipment covered by SIST EN 301 785 V1.1.1:2003 finds practical use in:
- Telecom Backhaul: Providing high-capacity wireless Ethernet transport between base stations, data centers, and network nodes-especially in urban and dense suburban environments.
- Enterprise Networks: Connecting corporate buildings or campuses where fiber installation is impractical or too costly.
- Last-Mile Access: Delivering reliable broadband links to business parks or remote sites, ensuring high data rates over short to medium distances.
- Temporary or Emergency Networks: Rapid deployment of wireless links for events, construction sites, or emergency situations where fixed infrastructure is unavailable.
- Carrier and Service Provider Networks: Enabling service expansion and redundancy with quick-to-deploy wireless links that support standard Ethernet interfaces.
This standard enables efficient, high-throughput packet data radio solutions that meet stringent performance and interoperability criteria, supporting the expanding needs of modern IP-based networks.
Related Standards
For successful implementation and compliance, several related standards should be considered in conjunction with SIST EN 301 785 V1.1.1:2003:
- EN 300 833: Focuses on antennas for point-to-point fixed radio systems in the 3 GHz to 60 GHz range.
- EN 301 126-1: Defines test procedures and conformance requirements for fixed radio point-to-point equipment.
- IEEE 802.3: Sets forth Ethernet (10BaseT, 100BaseT) physical layer and media access control requirements.
- EN 301489-4 / EN 300385: Detail electromagnetic compatibility (EMC) standards for radio equipment and ancillary fixed radio link equipment.
- CEPT/ERC Recommendations: Specify channel arrangements and spurious emission requirements for radio equipment operating in the specified frequency bands.
- EN 60950: Outlines safety requirements for information technology equipment.
SIST EN 301 785 V1.1.1:2003 thus serves as a foundation for robust, compliant, high-capacity fixed radio systems, supporting the ongoing evolution of broadband network infrastructure.
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Frequently Asked Questions
SIST EN 301 785 V1.1.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fixed Radio Systems; Point-to-point equipment; Parameters for packet data radio systems for transmission of digital signals operating in the frequency range 23, 26, 28 or 38 GHz". This standard covers: Define parameters for 10BaseT and 100BaseT baseband systems representing 10 Mbit/s and 100 Mbit/s capacities.
Define parameters for 10BaseT and 100BaseT baseband systems representing 10 Mbit/s and 100 Mbit/s capacities.
SIST EN 301 785 V1.1.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.040.20 - Transmission systems; 33.060.30 - Radio relay and fixed satellite communications systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 301 785 V1.1.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fixed Radio Systems; Point-to-point equipment; Parameters for packet data radio systems for transmission of digital signals operating in the frequency range 23, 26, 28 or 38 GHz33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 301 785 Version 1.1.1SIST EN 301 785 V1.1.1:2003en01-december-2003SIST EN 301 785 V1.1.1:2003SLOVENSKI
STANDARD
ETSIEN301785V1.1.1(2001-04)EuropeanStandard(Telecommunicationsseries)FixedRadioSystems;Point-to-pointequipment;Parametersforpacketdataradiosystemsfortransmissionofdigitalsignalsoperatinginthefrequencyrange23,26,28or38GHzSIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)2ReferenceDEN/TM-04092aKeywordsdigital,DRRS,point-to-point,radio,transmissionETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.73Symbolsandabbreviations.83.1Symbols.83.2Abbreviations.94Generalcharacteristics.94.1Channelarrangements.94.2ChannelSpacing.104.3Compatibilityrequirementsbetweensystems.104.4Performanceandavailabilityrequirements.104.5Environmentalconditions.104.5.1Equipmentwithinweatherprotectedlocations(indoorlocations).104.5.2Equipmentfornon-weatherprotectedlocations(outdoorlocations).114.6Powersupply.114.7Electromagneticcompatibility.114.8Systemblockdiagram.114.9ManagementInterface.114.10Branching/feeder/antennacharacteristics.114.10.1Antennaradiationpatterns.114.10.2Antennacross-PolarDiscrimination(XPD).114.10.3AntennaInter-PortIsolation(IPI).124.10.4Waveguideflanges(orotherconnectors).124.10.5Returnloss.125SystemParameters.125.1Transmissioncapacity.125.2DataInterfaceparameters.125.2.1EthernetDatainterface.125.3Transmittercharacteristics.125.3.1Transmitterpowerrange.135.3.2Transmitpowerandfrequencycontrol.135.3.2.1AutomaticTransmitPowerControl(ATPC).135.3.2.2RemoteTransmitPowerControl(RTPC).135.3.2.3RemoteFrequencyControl(RFC).135.3.3Transmitteroutputpowertolerance.145.3.4TransmitLocalOscillator(LO)frequencyarrangements.145.3.5RFspectrummask.145.3.6DiscreteCWlinesexceedingthespectrummasklimit.165.3.6.1Spectrallinesatthesymbolrate.165.3.6.2Otherspectrallines.165.3.7Spuriousemissions.175.3.7.1Spuriousemissions-external.175.3.7.2Spuriousemissions-internal.175.3.8Radiofrequencytolerance.175.4Receivercharacteristics.175.4.1Inputlevelrange.175.4.2Receiverlocaloscillatorfrequencyarrangements.175.4.3Spuriousemissions.175.5Systemperformancewithoutdiversity.185.5.1FERasafunctionofReceiverinputSignalLevel(RSL).185.5.2EquipmentResidualFER.195.5.3Interferencesensitivity.19SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)45.5.3.1Co-channelinterferencesensitivity.195.5.3.2AdjacentchannelInterference.205.5.3.3CWSpuriousInterference.205.5.3.4Front-endnon-linearityrequirements(two-toneCWspuriousinterference).205.5.4Distortionsensitivity.205.6Systemcharacteristicswithdiversity.21AnnexA(informative):Additionalinformation.22A.1Feeder/antennareturnloss.22A.2AutomaticTransmitPowerControl(ATPC).22A.3Co-channelandadjacentchannelinterference.23A.4RFER.25AnnexB(normative):Systemtypecodesforregulatoryprocedures.26AnnexC(informative):FER/BERequivalenceandFERperformancemeasurementequipmentsettings(example).27C.1FER/BERequivalence.27C.2FERequipmentsettingsandmeasurementtechniques(example).27History.28SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).ThepresentdocumenthasalreadybeenpublishedasanETSITechnicalSpecification,underTS101785.NationaltranspositiondatesDateofadoptionofthisEN:13April2001DateoflatestannouncementofthisEN(doa):31July2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31January2002DateofwithdrawalofanyconflictingNationalStandard(dow):31January2002SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)61ScopeThepresentdocumentspecifiestheminimumperformanceparametersforterrestrialfixedpacketdataserviceradiocommunicationsequipmentsoperatingat23,26,28,or38GHz.Suchdigitalsystemsareintendedtobeusedforpoint-to-pointconnectionsinlocalandregionalnetworksatdataratesof10Mbit/sand100Mbit/sandoperateinfull-duplexmode.Theparameterstobespecifiedfallintotwocategories:a)thosethatarerequiredtoprovidecompatibilitybetweenchannelsfromdifferentsourcesofequipmentonthesameroute,connectedeither:-toseparateantennas;or-toseparatepolarizationsofthesameantenna;b)parametersdefiningthetransmissionqualityoftheproposedsystem.ThepresentdocumentdealswithRadioFrequency(RF)andbasebandcharacteristicsrelevanttopacketdatanetworkingequipment.Antenna/feedersystemrequirementsarecoveredinEN300833[2].Thepresentdocumentdoesnotfocusonaspectsrelatedtotestproceduresandtestconditions,howevertheyaretobefoundinEN301126-1[1],IEEE1802.3[15],andIEEE1802.3d[16].Asthemaximumtransmissionrateinagivenbandwidthdependsonsystemspectralefficiency,differentequipmentclassesaredefined:Class2:equipmentspectralefficiencybasedontypically4-statesmodulationscheme(e.g.4-FSK,4-QAM,orequivalent);Class4:equipmentspectralefficiencybasedontypically16or32-statesmodulationscheme(e.g.16-QAM,32-QAM,orequivalent);Class5:equipmentspectralefficiencybasedontypically64or128-statesmodulationscheme(e.g.64-QAM,128-QAM,orequivalent).Theaboveclassesareindicativeonlyanddonotimplyanyconstrainttotheactualmodulationformat,providedthatalltherequirementsinthepresentdocumentaremet.SafetyaspectsareoutsidethemandateofETSIandtheywillnotbeconsideredinthepresentdocument.HowevercompliancetoEN60950[22]willberequiredtocomplywith1999/5/EC[24]Directive(R&TTE).TechnicalbackgroundformostoftheparametersandrequirementsreferredinthepresentdocumentmaybefoundinTR101036-1[11]andIEEE802.3[14].ThepresentdocumentdoesnotaddressSDH/PDHradiorequirements,thereforeequipmentwithSDH/PDHinterfacesshouldmeettherequirementsoftheappropriateSDH/PDHradiospecifications.SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)72ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIEN301126-1:"FixedRadioSystems;Conformancetesting;Part1:Point-to-Pointequipment-Definitions,generalrequirementsandtestprocedures".[2]ETSIEN300833:"FixedRadioSystems;Point-to-PointAntennas;Antennasforpoint-to-pointfixedradiosystemsoperatinginthefrequencyband3GHzto60GHz".[3]ETSIETS300019:"EquipmentEngineering(EE);Environmentalconditionsandenvironmentaltestsfortelecommunicationsequipment".[4]ETSIETS300132-1:"EquipmentEngineering(EE);Powersupplyinterfaceattheinputtotelecommunicationsequipment;Part1:Operatedbyalternatingcurrent(ac)derivedfromdirectcurrent(dc)sources".[5]ETSIETS300132-2:"EquipmentEngineering(EE);Powersupplyinterfaceattheinputtotelecommunicationsequipment;Part2:Operatedbydirectcurrent(dc)".[6]ETSIEN300385:"ElectromagneticcompatibilityandRadiospectrumMatters(ERM);ElectroMagneticCompatibility(EMC)standardforfixedradiolinksandancillaryequipment".[7]ITU-RRecommendationF.1102:"Characteristicsofradio-relaysystemsoperatinginfrequencybandsaboveabout17GHz".[8]ITU-RRecommendationF.1191-1:"Bandwidthsandunwantedemissionsofdigitalradio-relaysystems".[9]ITU-RRecommendationP.530-8:"Propagationdataandpredictionmethodsrequiredforthedesignofterrestrialline-of-sightsystems".[10]IEC60154-2:"Flangesforwaveguides.Part2:Relevantspecificationsforflangesforordinaryrectangularwaveguides".[11]ETSITR101036-1(V1.1.2):"TransmissionandMultiplexing(TM);DigitalRadioRelaySystems(DRRS);GenericwordingsforstandardsonDRRScharacteristics;Part1:Generalaspectsandpoint-to-pointequipmentparameters".[12]IEC60153-2:"Hollowmetallicwaveguides.Part2:Relevantspecificationsforordinaryrectangularwaveguides".[13]CEPT/ERCRecommendation74-01:"Spuriousemissions".[14]IEEE802.3(1998):"Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Localandmetropolitanareanetworks-Specificrequirements-Part3:Carriersensemultipleaccesswithcollisiondetection(CSMA/CD)accessmethodandphysicallayerspecifications".[15]IEEE1802.3(1991):"ConformanceTestMethodologyforIEEEStandardsforLocalandMetropolitanAreaNetworks:CarrierSenseMultipleAccesswithCollisionDetection(CSMA/CD)AccessMethodandPhysicalLayerSpecifications:CurrentlyContainsAttachmentUnitInterface(AUI)Cable(Section4)".[16]IEEE1802.3d(1993):"SupplementtoIEEEStd1802.3-1991,Type10BASE-TMediumAttachmentUnit(MAU)ConformanceTestMethodology(Section6)".SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)8[17]CEPTRecommendationT/R12-01:"Harmonizedradiofrequencychannelarrangementsforanalogueanddigitalterrestrialfixedsystemsoperatingintheband37-39,5GHz".[18]CEPTRecommendationT/R13-02E:"Preferredchannelarrangementsforfixedservicesintherange22,0-29,5GHz".[19]ITU-RRecommendationF.748-3:"Radio-frequencychannelarrangementsforradio-relaysystemsoperatinginthe25,26and28GHzbands".[20]ITU-RRecommendationF.637-3:"Radio-frequencychannelarrangementsforradio-relaysystemsoperatinginthe23GHzband".[21]IEEE802.1Q(1998):"IEEEStandardforLocalandMetropolitanAreaNetworks:VirtualBridgedLocalAreaNetworks".[22]EN60950:"Safetyofinformationtechnologyequipment".[23]CouncilDirective89/336/EECof3May1989ontheapproximationofthelawsoftheMemberStatesrelatingtoelectromagneticcompatibility.[24]Directive1999/5/ECoftheEuropeanParliamentandoftheCouncilof9March1999onradioequipmentandtelecommunicationsterminalequipmentandthemutualrecognitionoftheirconformity.[25]ETSIEN301489-4:"ElectromagneticcompatibilityandRadiospectrumMatters(ERM);ElectroMagneticCompatibility(EMC)standardforradioequipmentandservices;Part4:Specificconditionsforfixedradiolinksandancillaryequipmentandservices".3Symbolsandabbreviations3.1SymbolsForthepurposesofthepresentdocument,thefollowingsymbolsapply:dBdeciBeldBcdeciBelrelativetomeancarrierpowerdBideciBelrelativetoanisotropicradiatordBmdeciBelrelativeto1milliWattdBWdeciBelrelativeto1WattGHzGigaHertzkHzkiloHertzMbit/sMega-bitspersecondMHzMegaHertzppmpartspermillionSIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)93.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:acalternatingcurrentATPCAutomaticTransmitPowerControlBERBitErrorRatioC/ICarriertoInterferenceratioCSminminimumpracticalchannelseparation(foragivenradio-frequencychannelarrangement)CWContinuousWavedcdirectcurrentDRRSDigitalRadioRelaySystemsEMCElectroMagneticCompatibilityFERFrameErrorRatioFSKFrequency-ShiftKeying(modulation)IFIntermediateFrequencyIPIInter-PortIsolationLOLocalOscillatorQAMQuadratureAmplitudeModulationRFRadioFrequencyRFCRemoteFrequencyControlRFERResidualFERRSLReceiveSignalLevelRTPCRemoteTransmitPowerControlXPDcross-PolarDiscrimination4Generalcharacteristics4.1ChannelarrangementsTheequipmentshalloperateononeormoreofthechannelsasdefinedbelow:Thefrequencyrangeshallbe22,0GHzto22,6GHzpairedwith23GHzto23,6GHzThechannelarrangementsshallbeinaccordancewithCEPTRecommendationT/R13-02E[18].NOTE:InatransitionperiodfortheadoptionofCEPTRecommendationT/R13-02E[18],differentplans,derivedbyITU-RRecommendationF.637-3[20],mayberequiredonnationalbasis.Thefrequencyrangeshallbe24,50GHzto29,50GHz.ThechannelarrangementsshallbeinaccordancewithCEPTRecommendationT/R13-02E[18]orITU-RRecommendationF.748-3[19].Thefrequencyrangeshallbe37,0GHzto39,5GHz.ThechannelarrangementsshallbeinaccordancewithCEPTRecommendationT/R12-01[17].SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)104.2ChannelSpacingSystembitratesandtheirrelevantchannelspacinginthepresentdocumentarereportedintable1(fortheprecisepayloadbitrates,seeclause5.1).NOTE:Accordingtosystemscharacteristicstheequipmentcanbeconnectedeithertoseparateantennasoronaseparatepolarizationtothesameantenna.Table1:DigitalsystemschannelspacingforvariousbitratesPayloadBitRate[Mbit/s]10100ChannelClass2equipments7Spacing[MHz]Class4equipments3,556/28Class5equipments28Forregulatorypurposesinnationalproceduresforlicensingradioequipmentsaccordingtothepresentdocument,theabovesystemtypesshallbeidentifiedbythe"systemtypecodes"reportedinnormativeannexB.4.3CompatibilityrequirementsbetweensystemsThecompatibilityrequirementsbetweensystemsareasfollows:-thereshallbenorequirementtooperatetransmittingequipmentfromonemanufacturerwithreceivingequipmentfromanother;-thereshallnotbearequirementtomultiplexdifferentmanufacturersequipmentonthesameantenna;-dependingontheapplication,itshallbepossibletooperatethesysteminverticaland/orhorizontalpolarization,ifrequiredbythechannelarrangement.4.4PerformanceandavailabilityrequirementsTherequirementsfordigitalequipmentdefinedinclause5ofthepresentdocumentareintendedtomeetthenetworkperformancerequirementsdefinedbyIEEEfor10Mbit/sand100Mbit/sEthernetnetworks.TheimplicationofthelinkdesignontheperformanceisrecognizedandthegeneraldesigncriteriareportedinITU-RRecommendationsP.530-8[9]andF.1102[7]shallbeapplied.PerformancerequirementsforpublicnetworksareunderstudybytheITU-T.Allperformancemeasurementsshallbedonewith64octetframes.4.5EnvironmentalconditionsTheequipmentshallberequiredtomeettheenvironmentalconditionssetoutinETS300019[3]whichdefinesweatherprotectedandnon-weatherprotectedlocations,classesandtestseverity.Themanufacturershallstatewhichclasstheequipmentisdesignedtowithstand.4.5.1Equipmentwithinweatherprotectedlocations(indoorlocations)EquipmentintendedforoperationwithintemperaturecontrolledlocationsorpartiallytemperaturecontrolledlocationsshallmeettherequirementsofETS300019[3]classes3.1and3.2respectively.Optionally,themorestringentrequirementsofETS300019[3]classes3.3(non-temperaturecontrolledlocations),3.4(siteswithheattrap)and3.5(shelteredlocations)maybeapplied.SIST EN 301 785 V1.1.1:2003
ETSIETSIEN301785V1.1.1(2001-04)114.5.2Equipmentfornon-weatherprotectedlocations(outdoorlocations)Equipmentintendedforoperationwithinnon-weather-protectedlocationsshallmeettherequirementsofETS300019[3],class4.1or4.1E.Class4.1appliestomanyEuropeancountriesandclass4.1EappliestoallEuropeancountries.4.6PowersupplyThepowersupplyinterfaceshallbeinaccordancewiththecharacteristicsofoneormoreofthesecondaryvoltagesforeseeninETS30
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