SIST EN 300 338:1999

• Abstract:

  To prepare an urgent technical correction (A1) to ETS 300 338. Test method for Residual frequenct Modulation in MF/HF DSC encoder to be corrected.

• Status: Published
• Publication Date: 31-Oct-1999
• ICS: 33.060.20 - Receiving and transmitting equipment
• ICS: 33.100.01 - Electromagnetic compatibility in general
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-1999
• Due Date: 01-Nov-1999
• Completion Date: 01-Nov-1999
• Ref Project: ETSI EN 300 338 V1.2.1 (1999-04) - ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service

SIST EN 300 338:1999 is a Slovenian adoption of EN 300 338 V1.2.1, published by ETSI for ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM). It specifies the minimum technical characteristics and measurement methods for Digital Selective Calling (DSC) equipment used on ships in the maritime MF, MF/HF and VHF mobile service. The standard is written for DSC equipment used for distress, safety, routine calling and reception, whether the equipment is integrated with a transmitter or receiver or supplied as a separate unit.

What does SIST EN 300 338:1999 specify?

SIST EN 300 338:1999 sets minimum requirements for equipment that generates, transmits and receives DSC on board ships. It covers both integrated radio equipment and independent DSC units, and it ties the equipment design to the DSC signalling and operating procedures used in maritime mobile communications.

The document is organized into:

• general requirements
• test conditions
• environmental and conformance tests
• detailed sections for MF/HF and VHF transmitters, encoders, receivers and decoders
• Annex A for test calls
• Annex B for the adjacent channel power measurement arrangement

What are the key requirements of SIST EN 300 338:1999?

SIST EN 300 338:1999 focuses on practical shipboard operation, reliable DSC call handling and repeatable laboratory testing.

Equipment design and operation

Clause 3 requires the equipment to provide coding, transmission and decoding of DSC, with decoded information shown in plain language. For MF/HF and VHF combined equipment, the signal characteristics must be selected automatically for the band in use. In practice, this means the unit must behave correctly without operator reconfiguration when changing service band.

Controls, distress function and call handling

Clause 3 requires controls to be simple, clearly marked and arranged to reduce accidental activation. The distress function must use a dedicated distress button with at least two independent actions, and the equipment must show the status of a distress transmission. For the operator, this means distress calls are protected from casual use and their activation is visible.

Calls, identity and messages

Clause 3 requires permanent storage of the ship’s Maritime Mobile Service Identity (MMSI), automatic insertion of sequence codes and error check characters, and facilities for entering position and time. Incoming calls must be converted to readable form, and devices without a printer need internal storage for received distress and distress-category calls. This matters because the equipment must create complete, traceable call records and preserve urgent traffic when no printer is fitted.

Alarm, interface and safety provisions

Clause 3 requires acoustic and visual alarms for distress, urgency and other categories, plus interfaces for alarms, navigation data, position and UTC time. It also covers protection against overcurrent, overvoltage, reversed polarity, access to hazardous voltages, memory retention and compass safe distance. In practice, the equipment must survive shipboard electrical conditions and integrate with navigation and alarm systems.

Test conditions and measurement practice

Clause 4 defines normal and extreme test conditions, including temperature, humidity, power source variation and environmental tests such as vibration, damp heat, corrosion and rain for externally mounted equipment. It also defines test signals and measurement uncertainty limits. This gives laboratories a common way to check equipment in conditions similar to shipboard use.

Transmitter, encoder, receiver and decoder performance

Clauses 5 to 12 set measurements for frequency error, output power, modulation rate, residual modulation, unwanted emissions, tuning time, antenna protection, selectivity, blocking immunity, dynamic range, sensitivity and correct decoding of DSC call types. Separate sections cover MF/HF and VHF equipment, and separate encoder/decoder units. For buyers and testers, these are the core performance checks that show whether the unit can generate, receive and decode DSC reliably on the intended band.

What terms does SIST EN 300 338:1999 define?

• Digital Selective Calling (DSC) - A maritime signalling method used to generate, transmit and receive formatted digital calls.
• MMSI - The Maritime Mobile Service Identity, the ship’s 9-digit identity stored permanently in the equipment.
• MF/HF - Medium Frequency and High Frequency maritime radio operation covered by the standard.
• VHF - Very High Frequency maritime radio operation, including channel 70 DSC use.
• GMDSS - Global Maritime Distress and Safety System, used here to describe carriage-related capability classes.
• ECC - Error Check Character, added to DSC messages and verified on reception.
• RF - Radio Frequency, used for transmit and receive performance and test loads.

Who uses SIST EN 300 338:1999?

SIST EN 300 338:1999 is used by manufacturers of marine DSC radios, ship equipment integrators, test laboratories, type-approval teams, quality managers and maritime buyers. It is relevant to MF, MF/HF and VHF shipborne radio equipment used for distress, urgency, safety and routine calling. It also supports people responsible for conformity testing, installation checks and documentation review.

What changed in SIST EN 300 338:1999 from the previous edition?

SIST EN 300 338:1999 is an urgent technical correction (A1) to ETS 300 338. The stated correction is to the test method for residual frequency modulation in the MF/HF DSC encoder.

Which standards are used with SIST EN 300 338:1999?

The standard refers to these documents as normative or companion references:

• ETR 028 - gives the uncertainty approach used to interpret measurement uncertainty
• IEC 60529 - provides the rain-test classification referenced for externally mounted equipment
• International Convention for the Safety of Life at Sea (1974) as amended in 1988 - maritime safety context
• ISO 3791 - keyboard digit layout option for alphanumeric input panels
• ITU Radio Regulations - frequency use and maritime band context
• ITU-R M.493-6 - core DSC signalling format and call structure
• ITU-R M.541-5 - DSC operating procedures
• ITU-R M.689-2 - automatic/semi-automatic VHF radiotelephone procedures
• ITU-R M.1082-1 - automatic/semi-automatic MF/HF radiotelephone procedures
• ITU-R SM.332-4 - receiver selectivity background
• ITU-T E.161 - digit arrangement on numeric input panels
• ITU-T V.11 - binary signal levels for digital ports
• NMEA 0183, version 2.0.0 - automatic position, time and interface data for independent units

What does the SIST EN 300 338:1999 document contain?

The document contains clause-by-clause requirements, test setups and limit checks for DSC shipborne equipment. It includes measurement methods for transmitter frequency error, power, modulation, residual modulation and unwanted emissions, plus receiver sensitivity, selectivity and decoding checks. Annex A lists test calls and telecommands for different equipment classes, and Annex B specifies the receiver arrangement used for adjacent channel power measurements. The document also includes measurement uncertainty values and a figure for unwanted spectral components, which are used in type testing and conformance testing.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service47.020.70Navigacijska in krmilna opremaNavigation and control equipment33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.20Sprejemna in oddajna opremaReceiving and transmitting equipmentICS:Ta slovenski standard je istoveten z:EN 300 338 Version 1.2.1SIST EN 300 338:1999en01-november-1999SIST EN 300 338:1999SLOVENSKI
STANDARD
EN 300 338 V1.2.1 (1999-04)European Standard (Telecommunications series)Electromagnetic compatibilityand Radio spectrum Matters (ERM);Technical characteristics and methods of measurementfor equipment for generation, transmissionand reception of Digital Selective Calling (DSC)in the maritime MF, MF/HF and/or VHF mobile serviceSIST EN 300 338:1999

ETSIEN 300 338 V1.2.1 (1999-04)2ReferenceREN/ERM-RP01-033 (34o00ioo.PDF)Keywordsmaritime, radio, GMDSS, DSCETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail] copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: [e-mail] NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1999.All rights reserved.SIST EN 300 338:1999

ETSIEN 300 338 V1.2.1 (1999-04)3ContentsIntellectual Property Rights.9Foreword.91Scope.102References.113General requirements.123.1Construction.123.1.1General.123.1.2DSC signals input/output: analogue signals.123.1.3DSC signals input/output: digital signals.123.1.4Decoding.123.1.5Accessibility.123.1.6Calibration.123.1.7Selection of signal characteristics.123.1.8Reduction of power for VHF equipment.133.1.9VHF channel 70 access.133.1.10Automatic/semi-automatic service.133.2Switching time.133.3Frequencies.133.4Classes of emission.133.5Controls and indicators.143.5.1General.143.5.2Input panel.143.5.3Light sources.143.5.4Operation.143.5.5Markings.143.5.6Distress function.143.6Facilities for equipment for coding and decoding of DSC.153.6.1Composition of calls.153.6.2Visual indication.153.6.3Ship's identity.153.6.4Entry of information.153.6.5Insertion of sequence codes.153.6.6Insertion of error check character.153.6.7Distress call.153.6.8Remote control.153.6.9Single frequency distress call.163.6.10Multi-frequency distress call.163.6.11Distress call acknowledgement.163.6.12Incoming calls.163.6.13Internal memory.163.6.14Automatic acknowledgement.163.6.15Routine testing.163.7Alarm circuits.173.7.1Distress and urgency.173.7.2Other categories.173.8Interfaces between DSC equipment and external circuits.173.8.1Remote alarms.173.8.2Operational interfaces.173.8.3Printer output.173.8.4Other interfaces.173.9Safety precautions.173.9.1Excessive current and voltage.173.9.2Protection.183.9.3Earthing.18SIST EN 300 338:1999

ETSIEN 300 338 V1.2.1 (1999-04)43.9.4Access.183.9.5Memory.183.10Compass safe distance.183.11Instructions.183.12Warming-up period.183.12.1Time.183.12.2Heaters.193.12.3Heating circuits.194Test conditions.194.1General.194.2Generation and examination of the digital selective call signal.194.3Standard test signals.194.3.1References to standard test signals.194.3.2Standard test signal no. 1.194.3.3Standard test signal no. 2.204.3.4Standard test signal no. 3.204.3.5Standard test signal no. 4.204.4Determination of the symbol error rate in the output of the receiving part.204.5Impedance of test signal sources.204.5.1Equipment ports.204.5.2Impedances.214.5.2.1Non-integrated equipment.214.6Connection of test signals.214.7Test power source.214.8Internally generated signals.224.9Normal test conditions.224.9.1Normal temperature and humidity.224.9.2Normal test power source.224.9.2.1Mains voltage and mains frequency.224.9.2.2Secondary battery power source.224.9.2.3Other power sources.224.10Extreme test conditions.224.10.1Temperatures when testing under extreme conditions.224.10.2Procedures of tests at extreme temperatures.224.10.3Extreme values of test power source.234.10.3.1Mains voltage and mains frequency.234.10.3.2Secondary battery power sources.234.10.3.3Other power sources.234.11Environmental tests.234.11.1Introduction.234.11.2Procedure.234.11.3Performance check.234.11.4Vibration test.244.11.4.1Method of measurement.244.11.4.2Requirement.254.11.5Temperature tests.254.11.5.1Dry heat for externally mounted equipment.254.11.5.1.1Method of measurement.254.11.5.1.2Requirement.254.11.5.2Damp heat cycle.254.11.5.2.1Method of measurement.254.11.5.2.2Requirement.264.11.5.3Low temperature cycle for externally mounted equipment.264.11.5.3.1Method of measurement.264.11.5.3.2Requirement.264.11.6Corrosion test.264.11.6.1General.264.11.6.2Method of measurement.274.11.6.3Requirements.274.11.7Rain test.27SIST EN 300 338:1999

ETSIEN 300 338 V1.2.1 (1999-04)54.11.7.1General.274.11.7.2Method of measurement.284.11.7.3Requirements.284.12Measurement uncertainty and interpretation of the measuring results.294.12.1Measurement uncertainty.294.12.2Interpretation of measurement results.295MF/HF transmitter with integrated DSC encoder.305.1Frequency error.305.1.1Definition.305.1.2Method of measurement.305.1.3Limits.305.2RF output power.305.2.1Definition.305.2.2Method of measurement.305.2.3Limits.305.3Modulation rate.315.3.1Definition.315.3.2Method of measurement.315.3.3Limits.315.4Residual modulation of the transmitter.315.4.1Definition.315.4.2Method of measurement.315.4.3Limits.315.5Unwanted emission.315.5.1Definition.315.5.2Method of measurement.325.5.3Limits.335.6Testing of generated call sequences.335.7Tuning time.345.8Protection of transmitter.345.8.1Definition.345.8.2Method of measurement.345.8.3Limits.346VHF transmitter with integrated DSC encoder.346.1Frequency error (carrier).346.1.1Definition.346.1.2Method of measurement.346.1.3Limits.346.2Frequency error (demodulated signal).356.2.1Definition.356.2.2Method of measurement.356.2.3Limits.356.3Carrier power.356.3.1Definition.356.3.2Method of measurement.356.3.3Limits.356.3.3.1Normal test conditions.356.3.3.2Extreme test conditions.356.4Modulation index.366.4.1Definition.366.4.2Method of measurement.366.4.3Limits.366.5Modulation rate.366.5.1Definition.366.5.2Method of measurement.366.5.3Limits.366.6Residual modulation of the transmitter.366.6.1Definition.366.6.2Method of measurement.36SIST EN 300 338:1999

ETSIEN 300 338 V1.2.1 (1999-04)66.6.3Limits.376.7Adjacent channel power.376.7.1Definition.376.7.2Measurement.376.7.2.1Method of measurement.376.7.3Limits.376.8Conducted spurious emissions conveyed to the antenna.376.8.1Definition.376.8.2Method of measurement.386.8.3Limit.386.9Testing of generated call sequences.386.10Transient frequency behaviour of the transmitter.396.10.1Definitions.396.10.2Method of measurement.397MF/HF DSC encoder.427.1Frequency error.427.1.1Definition.427.1.2Method of measurement.427.1.3Limits.427.2Output voltage.427.2.1Definition.427.2.2Method of measurement.427.2.3Limits.427.2.3.1Analogue voltage.427.2.3.2Binary voltage.427.3Bit stream speed.437.3.1Definition.437.3.2Method of measurement.437.3.3Limits.437.4Unwanted spectral components of the output signal.437.4.1Definition.437.4.2Method of measurement.437.4.3Limits.447.5Testing of generated call sequences.447.6Residual frequency modulation.457.6.1Definition.457.6.2Method of measurement.457.6.3Limits.458VHF DSC encoder.458.1Frequency error.458.1.1Definition.458.1.2Method of measurements.458.1.3Limits.458.2Output voltage.458.2.1Definition.458.2.2Method of measurement.468.2.3Limits.468.2.3.1Analogue voltage.468.2.3.2Binary voltage.468.3Bit stream speed.468.3.1Definition.468.3.2Method of measurement.468.3.3Limits.468.4Unwanted spectral components of the output signal.468.4.1Definition.468.4.2Method of measurement.468.4.3Limits.478.5Testing of generated call sequences.478.6Residual frequency modulation.47SIST EN 300 338:1999

ETSIEN 300 338 V1.2.1 (1999-04)78.6.1Definition.478.6.2Method of measurement.478.6.3Limits.489MF/HF receiver with integrated DSC decoder.489.1Scanning watch receiver efficiency.489.1.1Definition.489.1.2Method of measurement.489.1.3Limits.489.2Calling sensitivity.499.2.1Definition.499.2.2Method of measurement.499.2.3Limits.499.3Adjacent channel selectivity.499.3.1Definition.499.3.2Method of measurement.499.3.3Limits.499.4Co-channel rejection.509.4.1Definition.509.4.2Method of measurements.509.4.3Limits.509.5RF intermodulation response.509.5.1Definition.509.5.2Method of measurement.509.5.3Limits.509.6Interference rejection and blocking immunity.519.6.1Definition.519.6.2Method of measurement.519.6.3Limits.519.7Dynamic range.519.7.1Definition.519.7.2Method of measurement.519.7.3Limits.519.8Conducted spurious emissions.529.8.1Definition.529.8.2Method of measurement.529.8.3Limits.529.9Verification of correct decoding of various types of digital selective calls.529.10Protection of receiver antenna input circuits.5210VHF receiver with integrated DSC decoder.5310.1Maximum usable sensitivity.
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