SIST EN 301 033 V1.2.1:2006

• Abstract:

  The present document states the minimum operational and performance requirements for shipborne receivers intended to be connected to an external installation, including a decoder for DSC, and used as receivers for watchkeeping DSC on board ships operating in the mobile MF, MF/HF and VHF band allocated in the ITU Radio Regulations [1] to the maritime mobile service, both in connection with distress and safety communication and in connection with general communication.; These requirements include the relevant provisions of the ITU Radio Regulations [1], ITU-R Recommendations M.493-11 [3], M.541-9 [11], M.489-2 [10] and the IMO Resolutions A.803(19), A.804(19), A.806(19) and A.694(17). The present document specifies also technical characteristics, methods of testing and required test results for dedicated watchkeeping receivers for use with radio installations in the GMDSS as required by chapter IV of the SOLAS. It covers both receivers with analogue output or with digital DSC signal output interfaces or with both. DSC watchkeeping receivers may be a separate equipment or be integrated with a DSC or radiotelephone equipment. For integrated equipment the present document specifies the requirements and methods of testing of the DSC watchkeeping receivers only. DSC watchkeeping receivers can be either fixed-frequency receivers or, in MF/HF bands, scanning receivers. Requirements for the DSC equipment or radiotelephone equipment are given in EN 300 338 [13], EN 300 162-1 [12] and EN 300 373-1 [14] respectively.

• Status: Published
• Publication Date: 31-Mar-2006
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 33.100.01 - Electromagnetic compatibility in general
• ICS: 47.020.70 - Navigation and control equipment
• 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-Apr-2006
• Due Date: 01-Apr-2006
• Completion Date: 01-Apr-2006
• Ref Project: ETSI EN 301 033 V1.2.1 (2005-12) - Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical characteristics and methods of measurement for shipborne watchkeeping receivers for reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and VHF bands

Overview

SIST EN 301 033 V1.2.1:2006 is a European standard that defines the minimum operational and performance requirements for shipborne watchkeeping receivers used for Digital Selective Calling (DSC) in the maritime medium frequency (MF), MF/high frequency (MF/HF), and very high frequency (VHF) bands. These bands are allocated to the maritime mobile service according to the ITU Radio Regulations and are critical for effective distress, safety, and general communications at sea. The standard also outlines the relevant technical characteristics, measurement methods, and required test results to ensure compliance and electromagnetic compatibility (EMC).

This document applies to DSC watchkeeping receivers onboard ships, whether as standalone devices or integrated with DSC or radiotelephone equipment. It also supports compliance with regulations under the Global Maritime Distress and Safety System (GMDSS) as required by SOLAS Chapter IV.

Key Topics

• Minimum Operational and Performance Requirements
  The standard specifies essential operational criteria and performance benchmarks for receivers, including their connection to external installations and DSC decoders.

• Applicable Frequency Bands

  • MF: Medium Frequency
  • MF/HF: Medium and High Frequency (including scanning receivers)
  • VHF: Very High Frequency

• Equipment Types

  • Dedicated or integrated watchkeeping receivers
  • Fixed-frequency and scanning-type receivers

• Technical Characteristics

  • Receiver sensitivity
  • Selectivity to adjacent and co-channel signals
  • Resistance to radio frequency (RF) interference and spurious emissions
  • Dynamic range, antenna protection, and interface specifications for both analogue and digital signal outputs

• Methods of Measurement

  • Standardized test procedures under normal and extreme environmental conditions
  • Specific assessment of scan efficiency, environmental durability, and emission levels

• Regulatory and Safety Requirements

  • References to ITU Radio Regulations, ITU-R Recommendations (e.g., M.493-11), and various IMO Resolutions
  • GMDSS compatibility for distress and safety communications

Applications

SIST EN 301 033 V1.2.1:2006 provides essential criteria for:

• Maritime Communication Safety: Ensures shipborne watchkeeping receivers reliably monitor and detect DSC signals for distress and safety operations, fulfilling SOLAS and GMDSS requirements.
• Integration with Navigation and Control Equipment: Supports integration with onboard radio communication systems, including DSC and radiotelephone units, facilitating seamless distress and general communication.
• Product Certification and Testing: Acts as a reference for manufacturers and testing laboratories to demonstrate compliance regarding EMC, radio spectrum matters, and environmental resistance.
• Regulatory Compliance: Helps maritime authorities, shipowners, and equipment suppliers verify that their communication equipment meets international marine safety and radio performance standards.

Related Standards

To provide comprehensive coverage for maritime communication equipment, the following related standards are referenced in the document:

• EN 300 338: DSC equipment requirements
• EN 300 162-1: Requirements for digital interfaces within navigation systems
• EN 300 373-1: Provisions for maritime radiotelephone equipment
• ITU Radio Regulations and ITU-R Recommendations M.493-11: International provisions for selective calling and maritime frequency allocation
• IEC 61162-1: Maritime digital interfaces

SIST EN 301 033 is a vital reference for ensuring that shipborne watchkeeping receivers used for DSC are safe, reliable, and compatible with international maritime regulations. Ensuring EMC and proper radio spectrum use is crucial for operational reliability at sea, protecting both human life and maritime assets.

SLOVENSKI STANDARD
01-april-2006
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Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical
characteristics and methods of measurement for shipborne watchkeeping receivers for
reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and VHF bands
Ta slovenski standard je istoveten z: EN 301 033 Version 1.2.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Technical characteristics and methods of measurement
for shipborne watchkeeping receivers
for reception of Digital Selective Calling (DSC)
in the maritime MF, MF/HF and VHF bands

2 ETSI EN 301 033 V1.2.1 (2005-12)

Reference
REN/ERM-TG26-065
Keywords
DSC, maritime, radio, receiver
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ETSI
3 ETSI EN 301 033 V1.2.1 (2005-12)
Contents
Intellectual Property Rights.7
Foreword.7
1 Scope.8
2 References.8
3 Definitions and abbreviations.9
3.1 Definitions.9
3.2 Abbreviations.9
4 General and operational requirements.10
4.1 General.10
4.2 Construction.10
4.2.1 General.10
4.2.2 Design.10
4.2.3 Accessibility.10
4.2.4 Calibration and maintenance.10
4.2.5 Antenna static protection.10
4.2.6 Digital input panels.10
4.3 Controls and indicators.11
4.3.1 General.11
4.3.2 Identification.11
4.3.3 Protection against possible maladjustment .11
4.3.4 Light sources.11
4.3.5 Operation.11
4.4 Software.11
4.5 Memory.11
4.6 Interfaces.11
4.6.1 DSC signal output; analogue interface.12
4.6.2 DSC signal output; digital interface.12
4.6.3 Operational interfaces.12
4.7 Marking and identification .12
4.8 Instructions.13
4.9 Warming-up period.13
4.10 Safety precautions.13
4.10.1 Excessive current and voltage.13
4.10.2 Earthing.13
4.10.3 Protection.13
4.11 Compass safe distance.13
5 Technical requirements.14
5.1 Frequency bands and channels .14
5.2 Mode of reception .14
5.3 Scanning receivers.15
5.3.1 Scanning sequence.15
5.3.2 Scanning frequencies.15
5.3.2.1 DSC distress frequencies.15
5.3.2.2 DSC frequencies for general communication.15
5.3.3 Stop/start of scanning.15
5.3.4 Frequency information.15
6 General test conditions.15
6.1 General.15
6.2 Test power source.16
6.3 Normal test conditions.16
6.3.1 Normal temperature and humidity.16
6.3.2 Normal test power source .16
6.3.2.1 ac voltage and frequency.16
ETSI
4 ETSI EN 301 033 V1.2.1 (2005-12)
6.3.2.2 Secondary battery power sources.16
6.3.2.3 Other power sources.16
6.4 Extreme test conditions .16
6.4.1 Extreme temperature tests.16
6.4.2 Extreme values of test power source .17
6.4.2.1 a.c. voltage and frequency.17
6.4.2.2 Secondary battery power sources.17
6.4.2.3 Other power sources.17
6.5 Connection of test signals to the receiver.17
6.5.1 Sources.17
6.5.2 Levels.17
6.6 Testing frequencies.17
6.6.1 General test frequencies.17
6.6.2 Additional test frequencies for HF equipment.18
6.7 Test signals.18
6.7.1 Standard test signal No. 1 .18
6.7.2 Standard test signal No. 2 .18
6.8 Measurement of bit error ratio.18
6.9 Measurement uncertainty and interpretation of the measuring results .19
6.9.1 Measurement uncertainty.19
6.9.2 Interpretation of measurement results.19
7 Environmental tests.19
7.1 Procedure.19
7.2 Performance check.20
7.3 Vibration test.20
7.3.1 Definition.20
7.3.2 Method of measurement.20
7.3.3 Requirement.20
7.4 Temperature tests.20
7.4.1 Dry heat.21
7.4.1.1 Definition.21
7.4.1.2 Method of measurement.21
7.4.1.3 Requirement.21
7.4.2 Damp heat.21
7.4.2.1 Definition.21
7.4.2.2 Method of measurement.21
7.4.2.3 Requirement.21
7.4.3 Low temperature.21
7.4.3.1 Definition.21
7.4.3.2 Method of measurement.22
7.4.3.3 Requirement.22
7.5 Corrosion test.22
7.5.1 General.22
7.5.2 Definition.22
7.5.3 Method of measurement.22
7.5.4 Requirements.22
8 MF/HF watchkeeping receiver.23
8.1 Calling sensitivity.23
8.1.1 Definition.23
8.1.2 Method of measurement.23
8.1.3 Limits.23
8.2 Adjacent channel selectivity.23
8.2.1 Definition.23
8.2.2 Method of measurement.23
8.2.3 Limits.24
8.3 Co-channel rejection.24
8.3.1 Definition.24
8.3.2 Method of measurements.24
8.3.3 Limits.24
8.4 RF intermodulation response.24
ETSI
5 ETSI EN 301 033 V1.2.1 (2005-12)
8.4.1 Definition.24
8.4.2 Method of measurement.24
8.4.3 Limits.24
8.5 Spurious response rejection.25
8.5.1 Definition.25
8.5.2 Method of measurement.25
8.5.3 Limits.26
8.6 Dynamic range.26
8.6.1 Definition.26
8.6.2 Method of measurement.26
8.6.3 Limits.26
8.7 Conducted spurious emissions into the antenna .26
8.7.1 Definition.26
8.7.2 Method of measurement.26
8.7.3 Limits.27
8.8 Radiated spurious emissions.27
8.8.1 Definition.27
8.8.2 Method of measurements.27
8.8.3 Limit.28
8.9 Protection of receiver antenna input circuits .28
8.9.1 Definition.28
8.9.2 Method of measurement.28
8.9.3 Limits.28
8.10 Scanning efficiency.28
8.10.1 Definition.28
8.10.2 Method of measurement.28
8.10.3 Limits.28
8.11 Stop/start of scanning (Watchkeeping receiver without DSC decoder) .29
8.11.1 Definition.29
8.11.2 Method of measurement.29
8.11.3 Limits.29
9 VHF watchkeeping receiver.29
9.1 Calling sensitivity.29
9.1.1 Definition.29
9.1.2 Method of measurement.29
9.1.3 Limits.29
9.2 Adjacent channel selectivity.29
9.2.1 Definition.29
9.2.2 Method of measurement.30
9.2.3 Limits.30
9.3 Co-channel rejection.30
9.3.1 Definition.30
9.3.2 Method of measurement.30
9.3.3 Limits.30
9.4 Intermodulation response.30
9.4.1 Definition.30
9.4.2 Method of measurement.31
9.4.3 Limits.31
9.5 Spurious response and blocking immunity.31
9.5.1 Definition.31
9.5.2 Method of measurement.31
9.5.3 Limits.31
9.6 Dynamic range.31
9.6.1 Definition.31
9.6.2 Method of measurement.32
9.6.3 Limit.32
9.7 Conducted spurious emissions into the antenna .32
9.7.1 Definition.32
9.7.2 Method of measurement.32
9.7.3 Limit.32
9.8 Radiated spurious emissions.32
ETSI
6 ETSI EN 301 033 V1.2.1 (2005-12)
9.8.1 Definition.32
9.8.2 Method of measurements.32
9.8.3 Limit.33
Annex A (normative): Radiated measurements .34
A.1 Test sites and general arrangements for measurements involving the use of radiated fields.34
A.1.1 Outdoor test site .34
A.1.2 Test antenna.35
A.1.3 Substitution antenna.35
A.1.4 Optional additional indoor site .35
A.2 Guidance on the use of radiation test sites .36
A.2.1 Measuring distance.36
A.2.2 Test antenna.36
A.2.3 Substitution antenna.36
A.2.4 Artificial antenna.37
A.2.5 Auxiliary cables.37
A.2.6 Acoustic measuring arrangement.37
A.3 Further optional alternative indoor test site using an anechoic chamber. .37
A.3.1 Example of the construction of a shielded anechoic chamber.38
A.3.2 Influence of parasitic reflections in anechoic chambers.38
A.3.3 Calibration of the shielded anechoic chamber.39
Annex B (informative): Bibliography.41
History .42

ETSI
7 ETSI EN 301 033 V1.2.1 (2005-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).

National transposition dates
Date of adoption of this EN: 23 September 2005
Date of latest announcement of this EN (doa): 31 December 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 June 2006
Date of withdrawal of any conflicting National Standard (dow): 30 June 2006

ETSI
8 ETSI EN 301 033 V1.2.1 (2005-12)
1 Scope
The present document states the minimum operational and performance requirements for shipborne receivers intended
to be connected to an external installation, including a decoder for DSC, and used as receivers for watchkeeping DSC
on board ships operating in the mobile MF, MF/HF and VHF band allocated in the ITU Radio Regulations [1] to the
maritime mobile service, both in connection with distress and safety communication and in connection with general
communication.
These requirements include the relevant provisions of the ITU Radio Regulations [1], ITU-R Recommendations
M.493-11 [3], M.541-9 [11], M.489-2 [10] and the IMO Resolutions A.803(19), A.804(19), A.806(19) and A.694(17).
The present document specifies also technical characteristics, methods of testing and required test results for dedicated
watchkeeping receivers for use with radio installations in the GMDSS as required by chapter IV of the SOLAS.
It covers both receivers with analogue output or with digital DSC signal output interfaces or with both.
DSC watchkeeping receivers may be a separate equipment or be integrated with a DSC or radiotelephone equipment.
For integrated equipment the present document specifies the requirements and methods of testing of the DSC
watchkeeping receivers only.
DSC watchkeeping receivers can be either fixed-frequency receivers or, in MF/HF bands, scanning receivers.
Requirements for the DSC equipment or radiotelephone equipment are given in EN 300 338 [13], EN 300 162-1 [12]
and EN 300 373-1 [14] respectively.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] ITU Radio Regulations (2001).
[2] ITU-T Recommendation E.161 (2001): "Arrangement of digits, letters and symbols on telephones
and other devices that can be used for gaining access to a telephone network".
[3] ITU-R Recommendation M.493-11 (2004): "Digital selective-calling system for use in the
maritime mobile service".
[4] ISO 3791 (1976): "Office machines and data processing equipment -- Keyboard layouts for
numeric applications".
[5] IEC 61162-1 (2000): "Maritime navigation and radiocommunication equipment and systems -
Digital interfaces - Part 1: Single talker and multiple listeners".
[6] ETSI TR 100 028-1 (2001): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics; Part 1".
[7] ITU-T Recommendation V.11 (1993): "Electrical characteristics for balanced double-current
interchange circuits operating at data signalling rates up to 10 Mbit/s".
[8] IEC 60417: "Graphical symbols for use on equipment".
ETSI
9 ETSI EN 301 033 V1.2.1 (2005-12)
[9] ITU-R Recommendation SM.332-4 (1994): "Selectivity of receivers".
[10] ITU-R Recommendation M.489-2: "Technical characteristics of VHF radiotelephone equipment
operating in the maritime mobile service in channels spaced by 25 kHz".
[11] ITU-R Recommendation M.541-9 (2004): "Operational procedures for the use of digital selective-
calling equipment in the maritime mobile service".
[12] ETSI EN 300 162-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Radiotelephone transmitters and receivers for the maritime mobile service operating in VHF
bands; Part 1: Technical characteristics and methods of measurement".
[13] ETSI EN 300 338: "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".
[14] ETSI EN 300 373-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Maritime mobile transmitters and receivers for use in the MF and HF bands; Part 1: Technical
characteristics and methods of measurement".
[15] NMEA 0183, version 3.01 (2002): "Standard for interfacing marine electronic devices".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
assigned frequency: centre of the frequency band assigned to a station
continuous watch: continuous watch means that the radio watch concerned is not interrupted other than for brief
intervals when the ship's receiving capability is impaired or blocked by its own communications or when the facilities
are under periodical maintenance or check
F1B: frequency modulation with digital information, without a sub-carrier for automatic reception
G2B: phase-modulation with digital information, with a sub-carrier for automatic reception
J2B: single sideband with digital information, with the use of a modulating sub-carrier for automatic reception, with the
carrier suppressed to at least 40 dB below peak envelope power
performance check: check of calling sensitivity (see clause 7.2)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
a.c. alternating current
d.c. direct current
DSC Digital Selective Calling
e.m.f. electromotive force
EUT Equipment Under Test
FSK Frequency Shift Keying
GMDSS Global Maritime Distress and Safety System
HF High Frequency
IF Intermediate Frequency
IMO International Maritime Organization
MF Medium Frequency
MF/HF Medium and High Frequency
r.m.s. root mean square
ETSI
10 ETSI EN 301 033 V1.2.1 (2005-12)
RF Radio Frequency
SOLAS (International Convention for the) Safety of Life at Sea
VHF Very High Frequency
4 General and operational requirements
4.1 General
The manufacturer shall declare that compliance to the requirement of clause 4 is achieved and shall provide relevant
documentation.
4.2 Construction
4.2.1 General
The equipment shall be so constructed that it is capable of keeping continuous watch on relevant DSC channels
(see clause 5.1) and of being operated readily.
4.2.2 Design
In all respects the mechanical and electrical design and construction and the finish of the equipment shall conform with
good engineering practice, and the equipment shall be suitable for use on board ships at sea.
The equipment shall be designed for continuous operation.
4.2.3 Accessibility
All parts of the equipment that are subject to inspection and maintenance adjustments, shall be easily accessible.
Components shall be easily identifiable either by markings within the equipment, or with the aid of technical
descriptions.
4.2.4 Calibration and maintenance
The equipment shall be so constructed that its main modules can easily be replaced and put into operation without
elaborate recalibration or readjustment.
4.2.5 Antenna static protection
In order to protect against damage due to static voltages that may appear at the input of the receiver, there shall be a d.c.
path from the antenna terminal to ground not exceeding 100 kΩ.
4.2.6 Digital input panels
Where a digital input panel with the digits "0" to "9" is provided, the digits should be arranged to conform with
ITU-T Recommendation E.161 [2]. However, where an alphanumeric keyboard layout, as used on office machinery and
data processing equipme
...