SIST EN 301 025-1 V1.1.2:2003

• Abstract:

  Editorial update implementing consequential changes resulting from the publication of EN 301 025-2.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 301 025-1 V1.1.2 (2000-08) - ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC); Part 1: Technical characteristics and methods of measurement

SIST EN 301 025-1 V1.1.2:2003 is the Slovenian adoption of ETSI EN 301 025-1 Version 1.1.2, published by SIST. It specifies the technical characteristics and measurement methods for VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC), mainly for shipborne fixed installations.

What does SIST EN 301 025-1 V1.1.2:2003 specify?

SIST EN 301 025-1 V1.1.2:2003 defines minimum requirements, test methods, and required test results for VHF marine radiotelephone equipment with Class D DSC. The document is organized into scope, references, definitions, general and operational requirements, technical requirements, general measurement conditions, environmental tests, transmitter tests, receiver tests, DSC decoder tests, and annexes.

The foreword identifies it as Part 1 of a multi-part standard for ERM VHF radiotelephone equipment and associated Class D DSC equipment. Part 2 is the harmonized EN under article 3.2 of the R&TTE Directive.

Annex	What it covers
Annex A	DSC calls
Annex B	Measuring receiver for adjacent channel power measurement
Annex C	Radiated measurements, including test sites and chamber guidance
Annex D	Description of the equipment

What are the key requirements of SIST EN 301 025-1 V1.1.2:2003?

SIST EN 301 025-1 V1.1.2:2003 requires equipment to be suitable for onboard vessel use and to support the core VHF and DSC functions needed for maritime calling and watchkeeping. In practice, this means the equipment must be built and controlled so that normal marine use, distress handling, and channel protection work predictably.

General and operational design

Clause 4 requires the manufacturer to declare compliance and provide documentation. The equipment must include a VHF radiotelephone, receiver, dedicated channel 70 watchkeeping receiver for the DSC decoder, DSC encoder, and DSC decoder.

Clause 4 also requires protection of channel 70 for DSC only, prevention of use of channels 75 and 76, and blocking of any additional licensed channels if required. This matters because the set must not be able to use reserved or prohibited channels by accident or by user action.

Controls, display, and distress operation

Clause 4 requires a dedicated, clearly identified distress button with a spring-loaded cover, two independent actions to start a distress alert, and a delay of at least 3 s before activation. The distress call is automatically sent five times, then the set retunes to channel 16 at maximum power.

The same clause requires clear channel indication, a manual channel selector, display of received and logged calls, stored unread messages, and storage of at least the last 10 received DSC calls. For buyers and installers, this shows how the operator interface must support fast, safe maritime use.

DSC, MMSI, and position data

Clause 5 requires permanent storage of the ship’s Maritime Mobile Service Identity (MMSI), automatic insertion of the identity into calls, and support for a Group MMSI. It also requires manual and automatic entry of position and time information, with IEC 61162-1 interfaces for automatic input.

If the position data stream fails, the operator must be prompted for manual input every four hours, and after 23.5 hours the position defaults to repeated 9s. This matters because distress and urgency calls depend on current vessel identity and position data.

Transmitter, receiver, and watchkeeping performance

Clauses 5, 8, 9, and 10 set the main radio performance requirements. They cover switching time, carrier power, frequency error, frequency deviation, modulation characteristics, adjacent channel power, spurious emissions, receiver sensitivity, selectivity, blocking, and DSC decoder performance.

In practice, these clauses tell a test lab what to measure and tell a buyer what level of radio stability and receiver immunity to expect. They also define the key limits for voice and DSC operation on channel 16 and channel 70.

Environmental robustness and alarms

Clause 7 requires vibration, dry heat, damp heat, and low-temperature tests with performance checks before and after exposure. Clause 5 requires automatic alarms for distress, urgency, and other incoming DSC categories, plus a manual cancel function and an acoustic level of at least 80 dB(A) at 1 m.

What terms does SIST EN 301 025-1 V1.1.2:2003 define?

• Class D - DSC equipment intended to provide minimum VHF distress, urgency, safety, and routine calling functions for maritime use.
• carrier frequency - The frequency to which the transmitter or receiver is tuned.
• frequency deviation - The difference between the instantaneous RF frequency and the carrier frequency.
• G3E - Phase modulation used for speech, with 6 dB/octave pre-emphasis.
• G2B - Phase modulation with digital information and a sub-carrier for DSC operation.
• MMSI - Maritime Mobile Service Identity, the ship identity number stored in the equipment.
• SINAD - Signal + Noise + Distortion to Noise + Distortion, used for receiver sensitivity and immunity measurements.

Who uses SIST EN 301 025-1 V1.1.2:2003?

SIST EN 301 025-1 V1.1.2:2003 is used by marine radio equipment manufacturers, test laboratories, certification bodies, shipbuilders, installers, and procurement teams. It is also relevant to quality managers and buyers who need to verify that a VHF radiotelephone with Class D DSC meets the expected maritime technical and measurement requirements.

What changed in SIST EN 301 025-1 V1.1.2:2003 from the previous edition?

SIST EN 301 025-1 V1.1.2:2003 is described as an editorial update implementing consequential changes resulting from publication of EN 301 025-2.

Which standards are used with SIST EN 301 025-1 V1.1.2:2003?

• ITU Radio Regulations, Appendix 18 - Provides the maritime VHF transmitting frequencies referenced for channel use.
• ITU-T Recommendation E.161 - Defines the digit, letter, and symbol arrangement for numeric keypads.
• ITU-T Recommendation P.53 - Provides the psophometer arrangement used for audio and SINAD-related receiver measurements.
• IEC 61162-1 - Defines the digital interface used for automatic position and time input.
• ITU-R Recommendation M.493-9 - Defines the DSC system and call structure used throughout the standard.
• ETSI ETR 028 - Provides the method for calculating measurement uncertainty.
• ITU-R Recommendation SM.332-4 - Supports the selectivity measurement method for adjacent channel power.
• ITU-R Recommendation M.825-1 - Covers automatic identification functions when provided.
• MSC/Circ.803 - Gives IMO guidance for participation of non-SOLAS ships in GMDSS.
• Council Directive 89/336/EEC - The EMC directive referenced in the references list.
• EN 301 025-2 - The companion part identified in the foreword.

What does the SIST EN 301 025-1 V1.1.2:2003 document contain?

The document contains detailed clause-by-clause test methods for transmitter, receiver, DSC encoder/decoder, and environmental performance. It includes measurement conditions for normal and extreme temperatures, supply voltages, uncertainty treatment, and test channel selection.

It also gives structured procedures for radiated measurements, adjacent channel power, spurious emissions, transient frequency behavior, and DSC call verification. Figures and setups support the measurements, including frequency deviation limits, audio response curves, a transient test arrangement, and storage oscilloscope timing templates.

Annex A lists DSC call types, Annex B specifies the measuring receiver used for adjacent channel power, and Annex C describes outdoor and chamber-based radiated test sites. Annex D provides a description of the equipment.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SULSDGDMRþDHKQLþQHElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC); Part 1: Technical characteristics and methods of measurement33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 301 025-1 Version 1.1.2SIST EN 301 025-1 V1.1.2:2003en01-december-2003SIST EN 301 025-1 V1.1.2:2003SLOVENSKI
STANDARD
ETSIEN301025-1V1.1.2(2000-08)EuropeanStandard(Telecommunicationsseries)ElectromagneticcompatibilityandRadiospectrumMatters(ERM);VHFradiotelephoneequipmentforgeneralcommunicationsandassociatedequipmentforClass"D"DigitalSelectiveCalling(DSC);Part1:TechnicalcharacteristicsandmethodsofmeasurementSIST EN 301 025-1 V1.1.2:2003

ETSIETSIEN301025-1V1.1.2(2000-08)2ReferenceREN/ERM-RP01-039-1Keywordsmaritime,radio,traffic,VHFETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°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:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 301 025-1 V1.1.2:2003

ETSIETSIEN301025-1V1.1.2(2000-08)3ContentsIntellectualPropertyRights.8Foreword.81Scope.92References.93Definitionsandabbreviations.103.1Definitions.103.2Abbreviations.104Generalandoperationalrequirements.104.1General.104.2Composition.104.3Construction.114.4Controlsandindicators.114.5FacilitiesforcodinganddecodingofDSC.124.5.1Callfunctions.124.5.2MANUALcalls.124.5.3Distresscalls.124.5.4ALLSHIPScalls.134.5.5Incomingcalls.134.6DSCdisplay.134.7Handsetandloudspeaker.134.8Safetyprecautions.134.9Labelling.144.10Warmup.145Technicalrequirements.145.1Switchingtime.145.2Classofemissionandmodulationcharacteristics.145.3FacilitiesforDSCtransmissionandreception.145.3.1General.145.3.2Decoding.155.3.3Freechanneltransmission.155.3.4Automaticacknowledgement.155.3.5Automaticre-transmissionofdistresscalls.155.4Shipsidentity-MMSIandGroupMMSI.155.5Entryofpositioninformation.155.6Alarmcircuits.165.6.1Distressandurgency.165.6.2Othercategories.165.6.3Acousticalarms.165.6.4Cancellationofalarms.165.7Facilitiesforautomaticidentification.165.8Multiplewatchfacilities.165.8.1General.165.8.2Scanningprovisions.165.8.3Scanningcharacteristics.176Generalconditionsofmeasurement.176.1Arrangementsfortestsignalsappliedtothereceiverinput.176.2Squelch.176.3Normaltestmodulation.176.4Artificialantenna.186.5Arrangementsfortestsignalsappliedtothetransmitterinput.186.6Testchannels.18SIST EN 301 025-1 V1.1.2:2003

ETSIETSIEN301025-1V1.1.2(2000-08)46.7Generationandexaminationofthedigitalselectivecallsignal.186.8StandardtestsignalsforDSC.186.9Determinationofthesymbolerrorratiointheoutputofthereceivingpart.186.10Measurementuncertaintyandinterpretationofthemeasuredresults.196.10.1Measurementuncertainty.196.10.2Interpretationofthemeasurementresults.196.11Testconditions,powersources,andambienttemperatures.196.11.1Normalandextremetestconditions.196.11.2Testpowersource.196.12Normaltestconditions.206.12.1Normaltemperatureandhumidity.206.12.2Normalpowersources.206.12.2.1Batterypowersource.206.12.2.2Otherpowersources.206.13Extremetestconditions.206.13.1Extremetemperatures.206.13.2Extremevaluesoftestpowersources.206.13.2.1Batterypowersource.206.13.2.2Otherpowersources.206.14Procedurefortestsatextremetemperatures.217Environmentaltests.217.1Introduction.217.2Procedure.217.3Performancecheck.217.4Vibrationtest.217.4.1Definition.217.4.2Methodofmeasurement.227.4.3Requirement.227.5Temperaturetests.227.5.1Definition.227.5.2Dryheat.227.5.2.1Definition.227.5.2.2Methodofmeasurement.227.5.2.3Requirement.237.5.3Dampheat.237.5.3.1Definition.237.5.3.2Methodofmeasurement.237.5.3.3Requirement.237.5.4Lowtemperature.237.5.4.1Definition.237.5.4.2Methodofmeasurement.237.5.4.3Requirement.238Transmitter.238.1Frequencyerror.248.1.1Definition.248.1.2Methodofmeasurement.248.1.3Limits.248.2Carrierpower.248.2.1Definition.248.2.2Methodofmeasurement.248.2.3Limits.248.2.3.1Normaltestconditions.248.2.3.2Extremetestconditions.248.3Frequencydeviation.258.3.1Definition.258.3.2Maximumpermissiblefrequencydeviation.258.3.2.1Methodofmeasurement.258.3.2.2Limits.258.3.3Reductionoffrequencydeviationatmodulationfrequenciesabove3kHz.25SIST EN 301 025-1 V1.1.2:2003

ETSIETSIEN301025-1V1.1.2(2000-08)58.3.3.1Methodofmeasurement.258.3.3.2Limits.258.4Sensitivityofthemodulator,includingmicrophone.268.4.1Definition.268.4.2Methodofmeasurement.268.4.3Limits.268.5Audiofrequencyresponse.268.5.1Definition.268.5.2Methodofmeasurement.268.5.3Limit.278.6Audiofrequencyharmonicdistortionoftheemission.278.6.1Definition.278.6.2Methodofmeasurement.288.6.2.1Normaltestconditions.288.6.2.2Extremetestconditions.288.6.3Limits.288.7Adjacentchannelpower.288.7.1Definition.288.7.2Methodofmeasurement.288.7.3Limits.298.8Conductedspuriousemissionsconveyedtotheantenna.298.8.1Definition.298.8.2Methodofmeasurement.298.8.3Limit.298.9Cabinetradiationandconductedspuriousemissionsotherthanthoseconveyedtotheantenna.298.9.1Definitions.298.9.2Methodofmeasurement.298.9.3Limits.308.10Transientfrequencybehaviourofthetransmitter.308.10.1Definitions.308.10.2Methodofmeasurement.318.10.3Limits.338.11Residualmodulationofthetransmitter.338.11.1Definition.338.11.2Methodofmeasurement.338.11.3Limit.338.12Frequencyerror(demodulatedDSCsignal).338.12.1Definition.338.12.2Methodofmeasurement.348.12.3Limits.348.13ModulationindexforDSC.348.13.1Definition.348.13.2Methodofmeasurement.348.13.3Limits.348.14ModulationrateforDSC.348.14.1Definition.348.14.2Methodofmeasurement.348.14.3Limits.348.15Testingofgeneratedcallsequences.358.15.1Definition.358.15.2Methodofmeasurement.358.15.3Requirement.359Radiotelephonereceiver.359.1Harmonicdistortionandratedaudio-frequencyoutputpower.359.1.1Definition.359.1.2Methodsofmeasurement.359.1.3Limits.369.2Audiofrequencyresponse.369.2.1Definition.369.2.2Methodofmeasurement.36SIST EN 301 025-1 V1.1.2:2003

ETSIETSIEN301025-1V1.1.2(2000-08)69.2.3Limits.369.3Maximumusablesensitivity.379.3.1Definition.379.3.2Methodofmeasurement.379.3.3Limits.389.4Co-channelrejection.389.4.1Definition.389.4.2Methodofmeasurement.389.4.3Limit.389.5Adjacentchannelselectivity.389.5.1Definition.389.5.2Methodofmeasurement.389.5.3Limits.399.6Spuriousresponserejection.399.6.1Definition.399.6.2Methodofmeasurement.399.6.3Limit.399.7Intermodulationresponse.399.7.1Definition.399.7.2Methodofmeasurement.409.7.3Limit.409.8Blockingordesensitization.409.8.1Definition.409.8.2Methodofmeasurement.409.8.3Limit.409.9Spuriousemissions.409.9.1Definition.409.9.2Methodofmeasuringthepowerlevel.419.9.3Limit.419.10Radiatedspuriousemissions.419.10.1Definition.419.10.2Methodofmeasurements.419.10.3Limit.429.11Receiverresidualnoiselevel.429.11.1Definition.429.11.2Methodofmeasurement.429.11.3Limit.429.12Squelchoperation.429.12.1Definition.429.12.2Methodofmeasurement.429.12.3Limits.439.13Squelchhysteresis.439.13.1Definition.439.13.2Methodofmeasurement.439.13.3Limit.439.14Multiplewatchcharacteristic.439.14.1Definition.439.14.2Methodofmeasurement.449.14.3Limits.4410ReceiverforDSCdecoder.4410.1Maximumusablesensitivity.4410.1.1Definition.4410.1.2Methodofmeasurement.4410.1.3Limits.4410.2Co-channelrejection.4510.2.1Definition.4510.2.2Methodofmeasurement.4510.2.3Limits.4510.3Adjacentchannelselectivity.4510.3.1Definition.45SIST EN 301 025-1 V1.1.2:2003

ETSIETSIEN301025-1V1.1.2(2000-08)710.3.2Methodofmeasurement.4510.3.3Limits.4510.4Spuriousresponseandblockingimmunity.4610.4.1Definition.4610.4.2Methodofmeasurement.4610.4.3Limits.4610.5Intermodulationresponse.4610.5.1Definition.4610.5.2Methodofmeasurement.4610.5.3Limits.4610.6Dynamicrange.4710.6.1Definition.4710.6.2Methodofmeasurement.4710.6.3Limit.4710.7Spuriousemissions.4710.7.1Definition.4710.7.2Methodofmeasuringthepowerlevel.4710.7.3Limit.4710.8Radiatedspuriousemissions.4710.8.1Definition.4710.8.2Methodofmeasurements.4710.8.3Limit.4810.9VerificationofcorrectdecodingofvarioustypesofDSCcalls.4810.9.1Definition.4810.9.2Methodofmeasurement.4810.9.3Requirement.49AnnexA(normative):DSCCalls.50AnnexB(normative):Measuringreceiverforadjacentchannelpowermeasurement.51B.1Powermeasuringreceiverspecification.51B.1.1IFfilter.51B.1.2Attenuationindicator.52B.1.3R.M.S.valueindicator.52B.1.4Oscillatorandamplifier.52AnnexC(normative):Radiatedmeasurements.53C.1Testsitesandgeneralarrangementsformeasurementsinvolvingtheuseofradiatedfields.53C.1.1Outdoortestsite.53C.1.2Testantenna.53C.1.3Substitutionantenna.54C.1.4Optionaladditionalindoorsite.54C.2Guidanceontheuseofradiationtestsites.55C.2.1Measuringdistance.55C.2.2Testantenna.5
...