SIST EN 301 033 V1.4.1:2013

• 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], Recommendation ITU-Rs M.493-13 [3], M.541-9 [9] and the IMO Resolutions A.803 (19) [i.5], A.804 (19) [i.6], A.806 (19) [i.7] and A.694 (17) [i.4]. 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 [i.8]. 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 300 338-2 [10], EN 301 925 [i.1] and EN 300 373-1 [i.3] respectively.

• Status: Published
• Public Enquiry End Date: 31-Mar-2013
• Publication Date: 24-Oct-2013
• 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: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 26-Sep-2013
• Due Date: 01-Dec-2013
• Completion Date: 25-Oct-2013
• Ref Project: ETSI EN 301 033 V1.3.6 (2013-07) - 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 V1.4.1:2013 is a European standard developed by the Slovenian Institute for Standardization (SIST) and ETSI. The document defines the minimum operational and performance requirements for shipborne watchkeeping receivers used for the reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF, and VHF bands. These receivers play a pivotal role in maritime safety, as they are used for distress and safety communications as well as general maritime communications. The standard is closely aligned with international regulations, including provisions from the ITU Radio Regulations, as well as IMO resolutions and recommendations relevant to the Global Maritime Distress and Safety System (GMDSS).

Key Topics

• Scope and Purpose
  The standard covers operational and technical characteristics required for shipborne DSC watchkeeping receivers, whether standalone or integrated with radiotelephone equipment.

• Minimum Operational Requirements

  • Compliance with ITU Radio Regulations and IMO resolutions
  • Reception capability in all relevant maritime frequency bands (MF, MF/HF, and VHF)
  • Distress frequency monitoring for distress alert and safety communication

• Performance and Test Methods

  • Technical characteristics, including sensitivity, selectivity, and blocking immunity
  • Methodologies for measurement and test procedures
  • Environmental testing for durability under maritime conditions (vibration, temperature extremes, corrosion)

• Receiver Types

  • Fixed-frequency and scanning receivers (in MF/HF bands)
  • Equipment may be a separate unit or integrated within other radio equipment

• Integration with GMDSS

  • Requirements align with Chapter IV of SOLAS for use within the GMDSS framework
  • Ensures compatibility with modern maritime communication systems

Applications

SIST EN 301 033 V1.4.1:2013 is essential for manufacturers, integrators, and operators of maritime radio equipment, particularly:

• Shipbuilders and Marine Electronics Manufacturers
  Ensures that radio equipment installed on vessels meets minimum international standards for safety and operational performance.

• Maritime Regulatory Authorities
  Provides a reference for equipment approval and compliance checks under national and international maritime regulations.

• Marine Equipment Installers and Technicians
  Enables proper installation, configuration, and testing of shipborne DSC watchkeeping receivers in compliance with the standard.

• Ship Operators and Owners
  Guarantees operational readiness of emergency and general communication equipment, supporting SOLAS and GMDSS requirements.

• Vessel Surveyors and Auditors
  Aids in verifying that equipment installed onboard vessels meets regulatory and safety requirements for electromagnetic compatibility and radio spectrum usage.

Related Standards

To ensure full compliance and interoperability within maritime communication systems, this standard should be considered alongside:

• EN 300 338-2
  Specification for DSC equipment in the marine MF and HF bands

• EN 301 925
  Standards addressing VHF DSC or radiotelephone equipment

• EN 300 373-1
  Requirements for general maritime mobile radio equipment

• ITU Radio Regulations
  International framework for frequency allocation and maritime communications

• IMO Resolutions (A.803, A.804, A.806, A.694)
  International Maritime Organization provisions related to shipborne receivers and distress systems

Practical Value

Implementing SIST EN 301 033 V1.4.1:2013 ensures that shipborne DSC watchkeeping receivers offer reliable performance, electromagnetic compatibility, and adherence to global safety standards. The standard’s requirements are fundamental for the functioning of the GMDSS, enhancing maritime safety by supporting prompt response to distress calls and ensuring effective maritime communication in both routine and emergency situations. Compliance also streamlines regulatory approval and ensures equipment interoperability across international fleets, supporting safer seas and efficient maritime operations.

Draft ETSI EN 301 033 V1.3.5 (2012-12)

European Standard
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 Draft ETSI EN 301 033 V1.3.5 (2012-12)

Reference
REN/ERM-TG26-098
Keywords
DSC, maritime, radio, receiver
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No 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 2012.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 301 033 V1.3.5 (2012-12)
Contents
Intellectual Property Rights . 7
Foreword . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
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 . 11
4.2.4 Calibration and maintenance. 11
4.2.5 Antenna static protection . 11
4.2.6 Digital input panels . 11
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 . 12
4.5 Memory . 12
4.6 Interfaces (applicable to non-integrated equipment) . 12
4.6.1 Audio Frequency . 12
4.6.2 Digital 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 . 15
6.3 Normal test conditions . 16
6.3.1 Normal temperature and humidity . 16
6.3.2 Normal test power source . 16
ETSI
4 Draft ETSI EN 301 033 V1.3.5 (2012-12)
6.3.2.1 ac voltage and frequency . 16
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 . 16
6.4.2.1 a.c. voltage and frequency . 16
6.4.2.2 Secondary battery power sources . 16
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 . 17
6.7 Test signals . 18
6.7.1 Reference to standard DSC signals . 18
6.7.2 Standard DSC test signal 1 . 18
6.7.3 Standard DSC test signal 2 . 18
6.8 Measurement of symbol error rate . 18
6.9 Measurement uncertainty and interpretation of the measuring results . 18
6.9.1 Measurement uncertainty . 18
6.9.2 Interpretation of measurement results . 19
7 Environmental tests . 19
7.1 Procedure . 19
7.2 Performance check . 19
7.3 Vibration test . 19
7.3.1 Definition . 19
7.3.2 Method of measurement . 19
7.3.3 Requirement . 20
7.4 Temperature tests . 20
7.4.1 Dry heat . 20
7.4.1.1 Definition . 20
7.4.1.2 Method of measurement . 20
7.4.1.3 Requirement . 20
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 . 21
7.4.3.3 Requirement . 21
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 . 22
8.1 General . 22
8.2 Calling sensitivity . 22
8.2.1 Definition . 22
8.2.2 Method of measurement . 22
8.2.3 Limits . 23
8.3 Adjacent channel selectivity . 23
8.3.1 Definition . 23
8.3.2 Method of measurement . 23
8.3.3 Limits . 23
8.4 Co-channel rejection. 23
8.4.1 Definition . 23
ETSI
5 Draft ETSI EN 301 033 V1.3.5 (2012-12)
8.4.2 Method of measurements . 23
8.4.3 Limits . 24
8.5 RF intermodulation response . 24
8.5.1 Definition . 24
8.5.2 Method of measurement . 24
8.5.3 Limits . 24
8.6 Spurious response rejection . 24
8.6.1 Definition . 24
8.6.2 Method of measurement . 24
8.6.3 Limits . 25
8.7 Blocking immunity . 25
8.7.1 Definition . 25
8.7.2 Method of measurement . 25
8.7.3 Limits . 26
8.8 Dynamic range . 26
8.8.1 Definition . 26
8.8.2 Method of measurement . 26
8.8.3 Limits . 26
8.9 Conducted spurious emissions into the antenna . 26
8.9.1 Definition . 26
8.9.2 Method of measurement . 26
8.9.3 Limits . 26
8.10 Radiated spurious emissions. 27
8.10.1 Definition . 27
8.10.2 Method of measurements . 27
8.10.3 Limit . 28
8.11 Protection of receiver antenna input circuits . 28
8.11.1 Definition . 28
8.11.2 Method of measurement . 28
8.11.3 Limits . 28
8.12 Scanning efficiency . 28
8.12.1 Definition . 28
8.12.2 Method of measurement . 28
8.12.3 Limits . 29
9 VHF watchkeeping receiver . 29
9.1 General . 29
9.2 Calling sensitivity . 29
9.2.1 Definition . 29
9.2.2 Method of measurement . 29
9.2.3 Limits . 29
9.3 Adjacent channel selectivity . 29
9.3.1 Definition . 29
9.3.2 Method of measurement . 29
9.3.3 Limits . 30
9.4 Co-channel rejection. 30
9.4.1 Definition . 30
9.4.2 Method of measurement . 30
9.4.3 Limits . 30
9.5 Intermodulation response . 30
9.5.1 Definition . 30
9.5.2 Method of measurement . 30
9.5.3 Limits . 31
9.6 Spurious response rejection . 31
9.6.1 Definition . 31
9.6.2 Method of measurement . 31
9.6.3 Limits . 32
9.7 Blocking immunity . 32
9.7.1 Definition . 32
9.7.2 Method of measurement . 32
9.7.3 Limits . 32
9.8 Dynamic range . 32
ETSI
6 Draft ETSI EN 301 033 V1.3.5 (2012-12)
9.8.1 Definition . 32
9.8.2 Method of measurement . 32
9.8.3 Limit . 32
9.9 Conducted spurious emissions into the antenna . 33
9.9.1 Definition . 33
9.9.2 Method of measurement . 33
9.9.3 Limit . 33
9.10 Radiated spurious emission . 33
9.10.1 Definition . 33
9.10.2 Method of measurements . 33
9.10.3 Limit . 34
Annex A (normative): Radiated measurements . 35
A.1 Test sites and general arrangements for measurements involving the use of radiated fields . 35
A.1.1 Outdoor test site . 35
A.1.2 Test antenna . 36
A.1.3 Substitution antenna . 36
A.1.4 Optional additional indoor site . 36
A.2 Guidance on the use of radiation test sites . 37
A.2.1 Measuring distance . 37
A.2.2 Test antenna . 37
A.2.3 Substitution antenna . 37
A.2.4 Artificial antenna . 38
A.2.5 Auxiliary cables . 38
A.2.6 Acoustic measuring arrangement . 38
A.3 Further optional alternative indoor test site using an anechoic chamber . 38
A.3.1 Example of the construction of a shielded anechoic chamber . 39
A.3.2 Influence of parasitic reflections in anechoic chambers . 39
A.3.3 Calibration of the shielded anechoic chamber . 40
Annex B (informative): Bibliography . 42
History . 43

ETSI
7 Draft ETSI EN 301 033 V1.3.5 (2012-12)
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://ipr.etsi.org).
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 draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility
and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
standards EN Approval Procedure.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI
8 Draft ETSI EN 301 033 V1.3.5 (2012-12)
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.493-13 [3], M.541-9 [9] and the IMO Resolutions A.803 (19) [i.5], A.804 (19) [i.6], A.806 (19) [i.7]
and A.694 (17) [i.4].
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 [i.8].
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 300 338-2 [10], EN 301 925 [i.1]
and EN 300 373-1 [i.3] respectively.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ITU Radio Regulations (2008).
[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.493-13: "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 (2010): "Maritime navigation and radiocommunication equipment and systems -
Digital interfaces - Part 1: Single talker and multiple listeners".
[6] ETSI TR 100 028-1 (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics; Part 1".
[7] ITU-T Recommendation V.11 (10/96): "Electrical characteristics for balanced double-current
interchange circuits operating at data signalling rates up to 10 Mbit/s".
ETSI
9 Draft ETSI EN 301 033 V1.3.5 (2012-12)
[8] IEC 60417: "Graphical symbols for use on equipment".
[9] ITU-R Recommendation M.541-9 (2004): "Operational procedures for the use of digital
selective-calling equipment in the maritime mobile service".
[10] ETSI EN 300 338-2: "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; Part 2: Class A/B DSC".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 301 925: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Radiotelephone transmitters and receivers for the maritime mobile service operating in VHF
bands; Technical characteristics and methods of measurement".
[i.2] ITU-R Recommendation SM.332-4 (1978): "Selectivity of receivers".
[i.3] 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".
[i.4] IMO Resolution A.694 (17): "General requirements for shipborne radio equipment forming part of
the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids".
[i.5] IMO Resolution A.803 (19) amended by MSC.68 (68): "Performance standards for shipborne
VHF radio installations capable of voice communication and digital selective calling".
[i.6] IMO Resolution A.804 (19) as amended by MSC.68 (68): "Performance Standards for Shipborne
MF Radio Installations capable of Voice Communications and Digital Selective Calling".
[i.7] IMO Resolution A.806 (19) as amended by MSC.68 (68): "Performance standards for shipborne
MF/HF radio installations capable of voice communication, narrow-band direct-printing and
digital selective calling".
[i.8] International Convention for the Safety of Life at Sea (SOLAS) 1974, as amended.
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)
ETSI
10 Draft ETSI EN 301 033 V1.3.5 (2012-12)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
a.c. alternating current
AGC Automatic Gain Control
d.c. direct current
DSC Digital Selective Calling
e.m.f. electromotive force
EUT Equipment Under Test
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
RF Radio Frequency
SER Symbol Error Rate
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 requirements of this clause (clause 4) is achieved and shall
provide relevant documentation.
The present document deals with equipment having integrated or associated DSC decoder.
If the radio equipment under test is
...

Final draft ETSI EN 301 033 V1.3.6 (2013-07)

European Standard
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 Final draft ETSI EN 301 033 V1.3.6 (2013-07)

Reference
REN/ERM-TG26-098
Keywords
DSC, maritime, radio, receiver
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No 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 2013.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
Contents
Intellectual Property Rights . 7
Foreword . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 General and operational requirements . 10
4.1 General . 10
4.2 Construction . 10
4.2.1 General . 10
4.2.2 Design . 11
4.2.3 Accessibility . 11
4.2.4 Calibration and maintenance. 11
4.2.5 Antenna static protection . 11
4.2.6 Digital input panels . 11
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 . 12
4.3.5 Operation . 12
4.4 Software . 12
4.5 Memory . 12
4.6 Interfaces (applicable to non-integrated equipment) . 12
4.6.1 Audio Frequency . 12
4.6.2 Digital 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 . 14
5 Technical requirements . 14
5.1 Frequency bands and channels . 14
5.2 Mode of reception . 15
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
ETSI
4 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
6.3.2.1 ac voltage and frequency . 16
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 Reference to standard DSC signals . 18
6.7.2 Standard DSC test signal 1 . 18
6.7.3 Standard DSC test signal 2 . 18
6.8 Measurement of symbol error rate . 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 . 19
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 General . 23
8.2 Calling sensitivity . 23
8.2.1 Definition . 23
8.2.2 Method of measurement . 23
8.2.3 Limits . 23
8.3 Adjacent channel selectivity . 23
8.3.1 Definition . 23
8.3.2 Method of measurement . 23
8.3.3 Limits . 24
8.4 Co-channel rejection. 24
8.4.1 Definition . 24
ETSI
5 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
8.4.2 Method of measurements . 24
8.4.3 Limits . 24
8.5 RF intermodulation response . 24
8.5.1 Definition . 24
8.5.2 Method of measurement . 24
8.5.3 Limits . 24
8.6 Spurious response rejection . 25
8.6.1 Definition . 25
8.6.2 Method of measurement . 25
8.6.3 Limits . 26
8.7 Blocking immunity . 26
8.7.1 Definition . 26
8.7.2 Method of measurement . 26
8.7.3 Limits . 26
8.8 Dynamic range . 26
8.8.1 Definition . 26
8.8.2 Method of measurement . 26
8.8.3 Limits . 26
8.9 Conducted spurious emissions into the antenna . 27
8.9.1 Definition . 27
8.9.2 Method of measurement . 27
8.9.3 Limits . 27
8.10 Radiated spurious emissions. 27
8.10.1 Definition . 27
8.10.2 Method of measurements . 27
8.10.3 Limit . 28
8.11 Protection of receiver antenna input circuits . 28
8.11.1 Definition . 28
8.11.2 Method of measurement . 28
8.11.3 Limits . 29
8.12 Scanning efficiency . 29
8.12.1 Definition . 29
8.12.2 Method of measurement . 29
8.12.3 Limits . 29
9 VHF watchkeeping receiver . 29
9.1 General . 29
9.2 Calling sensitivity . 29
9.2.1 Definition . 29
9.2.2 Method of measurement . 29
9.2.3 Limits . 30
9.3 Adjacent channel selectivity . 30
9.3.1 Definition . 30
9.3.2 Method of measurement . 30
9.3.3 Limits . 30
9.4 Co-channel rejection. 30
9.4.1 Definition . 30
9.4.2 Method of measurement . 30
9.4.3 Limits . 31
9.5 Intermodulation response . 31
9.5.1 Definition . 31
9.5.2 Method of measurement . 31
9.5.3 Limits . 31
9.6 Spurious response rejection . 31
9.6.1 Definition . 31
9.6.2 Method of measurement . 31
9.6.3 Limits . 32
9.7 Blocking immunity . 32
9.7.1 Definition . 32
9.7.2 Method of measurement . 32
9.7.3 Limits . 33
9.8 Dynamic range . 33
ETSI
6 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
9.8.1 Definition . 33
9.8.2 Method of measurement . 33
9.8.3 Limit . 33
9.9 Conducted spurious emissions into the antenna . 33
9.9.1 Definition . 33
9.9.2 Method of measurement . 33
9.9.3 Limit . 33
9.10 Radiated spurious emission . 34
9.10.1 Definition . 34
9.10.2 Method of measurements . 34
9.10.3 Limit . 35
Annex A (normative): Radiated measurements . 36
A.1 Test sites and general arrangements for measurements involving the use of radiated fields . 36
A.1.1 Outdoor test site . 36
A.1.2 Test antenna . 37
A.1.3 Substitution antenna . 37
A.1.4 Optional additional indoor site . 37
A.2 Guidance on the use of radiation test sites . 38
A.2.1 Measuring distance . 38
A.2.2 Test antenna . 38
A.2.3 Substitution antenna . 38
A.2.4 Artificial antenna . 39
A.2.5 Auxiliary cables . 39
A.2.6 Acoustic measuring arrangement . 39
A.3 Further optional alternative indoor test site using an anechoic chamber . 39
A.3.1 Example of the construction of a shielded anechoic chamber . 40
A.3.2 Influence of parasitic reflections in anechoic chambers . 40
A.3.3 Calibration of the shielded anechoic chamber . 41
Annex B (informative): Bibliography . 43
History . 44

ETSI
7 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
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://ipr.etsi.org).
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 final draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the ETSI standards EN
Approval Procedure.
The present document may be referenced in the Marine Equipment Directive [i.9], Annex A.1 ("equipment for which
detailed testing standards already exist in international instruments").

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

ETSI
8 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
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], Recommendation
ITU-Rs M.493-13 [3], M.541-9 [9] and the IMO Resolutions A.803 (19) [i.5], A.804 (19) [i.6], A.806 (19) [i.7] and
A.694 (17) [i.4].
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 [i.8].
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 300 338-2 [10], EN 301 925 [i.1]
and EN 300 373-1 [i.3] respectively.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ITU Radio Regulations (2012).
[2] Recommendation ITU-T 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] Recommendation ITU-R M.493-13: "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 (2010): "Maritime navigation and radiocommunication equipment and systems -
Digital interfaces - Part 1: Single talker and multiple listeners".
[6] ETSI TR 100 028-1 (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics; Part 1".
[7] Recommendation ITU-T V.11 (10/1996): "Electrical characteristics for balanced double-current
interchange circuits operating at data signalling rates up to 10 Mbit/s".
ETSI
9 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
[8] IEC 60417: "Graphical symbols for use on equipment".
[9] Recommendation ITU-R M.541-9 (2004): "Operational procedures for the use of digital selective-
calling equipment in the maritime mobile service".
[10] ETSI EN 300 338-2: "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; Part 2: Class A/B DSC".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 301 925: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Radiotelephone transmitters and receivers for the maritime mobile service operating in VHF
bands; Technical characteristics and methods of measurement".
[i.2] Recommendation ITU-R SM.332-4 (1978): "Selectivity of receivers".
[i.3] 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".
[i.4] IMO Resolution A.694 (17): "General requirements for shipborne radio equipment forming part of
the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids".
[i.5] IMO Resolution A.803 (19) amended by MSC.68 (68): "Performance standards for shipborne
VHF radio installations capable of voice communication and digital selective calling".
[i.6] IMO Resolution A.804 (19) as amended by MSC.68 (68): "Performance Standards for Shipborne
MF Radio Installations capable of Voice Communications and Digital Selective Calling".
[i.7] IMO Resolution A.806 (19) as amended by MSC.68 (68): "Performance standards for shipborne
MF/HF radio installations capable of voice communication, narrow-band direct-printing and
digital selective calling".
[i.8] International Convention for the Safety of Life at Sea (SOLAS) 1974, as amended.
[i.9] Council Directive 96/98/EC of 20 December 1996 on marine equipment, as amended by
commission directive 2011/75/EU.
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
ETSI
10 Final draft ETSI EN 301 033 V1.3.6 (2013-07)
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
AGC Automatic Gain Control
d.c. direct current
DSC Digital Selective Calling
e.m.f. electromotive force
EUT Equipment Under Test
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
RF Radio Frequency
SER Symbol Error Rate
SOLAS (International Convention for the) Safety Of Life At Sea
VHF Very H
...

ETSI EN 301 033 V1.4.1 (2013-09)

European Standard
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 V1.4.1 (2013-09)

Reference
REN/ERM-TG26-098
Keywords
DSC, maritime, radio, receiver
ETSI
650 Route des Lucioles
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Copyright Notification
No 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 2013.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 301 033 V1.4.1 (2013-09)
Contents
Intellectual Property Rights . 7
Foreword . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 General and operational requirements . 10
4.1 General . 10
4.2 Construction . 10
4.2.1 General . 10
4.2.2 Design . 11
4.2.3 Accessibility . 11
4.2.4 Calibration and maintenance. 11
4.2.5 Antenna static protection . 11
4.2.6 Digital input panels . 11
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 . 12
4.3.5 Operation . 12
4.4 Software . 12
4.5 Memory . 12
4.6 Interfaces (applicable to non-integrated equipment) . 12
4.6.1 Audio Frequency . 12
4.6.2 Digital 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 . 14
5 Technical requirements . 14
5.1 Frequency bands and channels . 14
5.2 Mode of reception . 15
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
ETSI
4 ETSI EN 301 033 V1.4.1 (2013-09)
6.3.2.1 ac voltage and frequency . 16
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 Reference to standard DSC signals . 18
6.7.2 Standard DSC test signal 1 . 18
6.7.3 Standard DSC test signal 2 . 18
6.8 Measurement of symbol error rate . 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 . 19
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 General . 23
8.2 Calling sensitivity . 23
8.2.1 Definition . 23
8.2.2 Method of measurement . 23
8.2.3 Limits . 23
8.3 Adjacent channel selectivity . 23
8.3.1 Definition . 23
8.3.2 Method of measurement . 23
8.3.3 Limits . 24
8.4 Co-channel rejection. 24
8.4.1 Definition . 24
ETSI
5 ETSI EN 301 033 V1.4.1 (2013-09)
8.4.2 Method of measurements . 24
8.4.3 Limits . 24
8.5 RF intermodulation response . 24
8.5.1 Definition . 24
8.5.2 Method of measurement . 24
8.5.3 Limits . 24
8.6 Spurious response rejection . 25
8.6.1 Definition . 25
8.6.2 Method of measurement . 25
8.6.3 Limits . 26
8.7 Blocking immunity . 26
8.7.1 Definition . 26
8.7.2 Method of measurement . 26
8.7.3 Limits . 26
8.8 Dynamic range . 26
8.8.1 Definition . 26
8.8.2 Method of measurement . 26
8.8.3 Limits . 26
8.9 Conducted spurious emissions into the antenna . 27
8.9.1 Definition . 27
8.9.2 Method of measurement . 27
8.9.3 Limits . 27
8.10 Radiated spurious emissions. 27
8.10.1 Definition . 27
8.10.2 Method of measurements . 27
8.10.3 Limit . 28
8.11 Protection of receiver antenna input circuits . 28
8.11.1 Definition . 28
8.11.2 Method of measurement . 28
8.11.3 Limits . 29
8.12 Scanning efficiency . 29
8.12.1 Definition . 29
8.12.2 Method of measurement . 29
8.12.3 Limits . 29
9 VHF watchkeeping receiver . 29
9.1 General . 29
9.2 Calling sensitivity . 29
9.2.1 Definition . 29
9.2.2 Method of measurement . 29
9.2.3 Limits . 30
9.3 Adjacent channel selectivity . 30
9.3.1 Definition . 30
9.3.2 Method of measurement . 30
9.3.3 Limits . 30
9.4 Co-channel rejection. 30
9.4.1 Definition . 30
9.4.2 Method of measurement . 30
9.4.3 Limits . 31
9.5 Intermodulation response . 31
9.5.1 Definition . 31
9.5.2 Method of measurement . 31
9.5.3 Limits . 31
9.6 Spurious response rejection . 31
9.6.1 Definition . 31
9.6.2 Method of measurement . 31
9.6.3 Limits . 32
9.7 Blocking immunity . 32
9.7.1 Definition . 32
9.7.2 Method of measurement . 32
9.7.3 Limits . 33
9.8 Dynamic range . 33
ETSI
6 ETSI EN 301 033 V1.4.1 (2013-09)
9.8.1 Definition . 33
9.8.2 Method of measurement . 33
9.8.3 Limit . 33
9.9 Conducted spurious emissions into the antenna . 33
9.9.1 Definition . 33
9.9.2 Method of measurement . 33
9.9.3 Limit . 33
9.10 Radiated spurious emission . 34
9.10.1 Definition . 34
9.10.2 Method of measurements . 34
9.10.3 Limit . 35
Annex A (normative): Radiated measurements . 36
A.1 Test sites and general arrangements for measurements involving the use of radiated fields . 36
A.1.1 Outdoor test site . 36
A.1.2 Test antenna . 37
A.1.3 Substitution antenna . 37
A.1.4 Optional additional indoor site . 37
A.2 Guidance on the use of radiation test sites . 38
A.2.1 Measuring distance . 38
A.2.2 Test antenna . 38
A.2.3 Substitution antenna . 38
A.2.4 Artificial antenna . 39
A.2.5 Auxiliary cables . 39
A.2.6 Acoustic measuring arrangement . 39
A.3 Further optional alternative indoor test site using an anechoic chamber . 39
A.3.1 Example of the construction of a shielded anechoic chamber . 40
A.3.2 Influence of parasitic reflections in anechoic chambers . 40
A.3.3 Calibration of the shielded anechoic chamber . 41
Annex B (informative): Bibliography . 43
History . 44

ETSI
7 ETSI EN 301 033 V1.4.1 (2013-09)
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://ipr.etsi.org).
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 (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
The present document may be referenced in the Marine Equipment Directive [i.9], Annex A.1 ("equipment for which
detailed testing standards already exist in international instruments").

National transposition dates
Date of adoption of this EN: 9 September 2013
Date of latest announcement of this EN (doa): 31 December 2013
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 June 2014
Date of withdrawal of any conflicting National Standard (dow): 30 June 2015

ETSI
8 ETSI EN 301 033 V1.4.1 (2013-09)
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], Recommendation ITU-Rs
M.493-13 [3], M.541-9 [9] and the IMO Resolutions A.803 (19) [i.5], A.804 (19) [i.6], A.806 (19) [i.7] and
A.694 (17) [i.4].
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 [i.8].
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 300 338-2 [10], EN 301 925 [i.1]
and EN 300 373-1 [i.3] respectively.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ITU Radio Regulations (2012).
[2] Recommendation ITU-T 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] Recommendation ITU-R M.493-13: "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 (2010): "Maritime navigation and radiocommunication equipment and systems -
Digital interfaces - Part 1: Single talker and multiple listeners".
[6] ETSI TR 100 028-1 (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics; Part 1".
[7] Recommendation ITU-T V.11 (10/1996): "Electrical characteristics for balanced double-current
interchange circuits operating at data signalling rates up to 10 Mbit/s".
ETSI
9 ETSI EN 301 033 V1.4.1 (2013-09)
[8] IEC 60417: "Graphical symbols for use on equipment".
[9] Recommendation ITU-R M.541-9 (2004): "Operational procedures for the use of digital selective-
calling equipment in the maritime mobile service".
[10] ETSI EN 300 338-2: "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; Part 2: Class A/B DSC".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 301 925: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Radiotelephone transmitters and receivers for the maritime mobile service operating in VHF
bands; Technical characteristics and methods of measurement".
[i.2] Recommendation ITU-R SM.332-4 (1978): "Selectivity of receivers".
[i.3] 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".
[i.4] IMO Resolution A.694 (17): "General requirements for shipborne radio equipment forming part of
the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids".
[i.5] IMO Resolution A.803 (19) amended by MSC.68 (68): "Performance standards for shipborne
VHF radio installations capable of voice communication and digital selective calling".
[i.6] IMO Resolution A.804 (19) as amended by MSC.68 (68): "Performance Standards for Shipborne
MF Radio Installations capable of Voice Communications and Digital Selective Calling".
[i.7] IMO Resolution A.806 (19) as amended by MSC.68 (68): "Performance standards for shipborne
MF/HF radio installations capable of voice communication, narrow-band direct-printing and
digital selective calling".
[i.8] International Convention for the Safety of Life at Sea (SOLAS) 1974, as amended.
[i.9] Council Directive 96/98/EC of 20 December 1996 on marine equipment, as amended by
Commission Directive 2011/75/EU.
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
ETSI
10 ETSI EN 301 033 V1.4.1 (2013-09)
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
AGC Automatic Gain Control
d.c. direct current
DSC Digital Selective Calling
e.m.f. electromotive force
EUT Equipment Under Test
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
RF Radio Frequency
SER Symbol Error Rate
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 requirements of this clause is achieved and shall provide relevant
documenta
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.9+)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 bands47.020.70Navigacijska in krmilna opremaNavigation and control equipment33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 301 033 Version 1.4.1SIST EN 301 033 V1.4.1:2013en01-november-2013SIST EN 301 033 V1.4.1:2013SLOVENSKI
STANDARD
ETSI EN 301 033 V1.4.1 (2013-09) 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
European Standard SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 2
Reference REN/ERM-TG26-098 Keywords DSC, maritime, radio, receiver ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: [phone]
Fax: [phone]
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
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DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 3 Contents Intellectual Property Rights . 7 Foreword . 7 1 Scope . 8 2 References . 8 2.1 Normative references . 8 2.2 Informative references . 9 3 Definitions and abbreviations . 9 3.1 Definitions . 9 3.2 Abbreviations . 10 4 General and operational requirements . 10 4.1 General . 10 4.2 Construction . 10 4.2.1 General . 10 4.2.2 Design . 11 4.2.3 Accessibility . 11 4.2.4 Calibration and maintenance. 11 4.2.5 Antenna static protection . 11 4.2.6 Digital input panels . 11 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 . 12 4.3.5 Operation . 12 4.4 Software . 12 4.5 Memory . 12 4.6 Interfaces (applicable to non-integrated equipment) . 12 4.6.1 Audio Frequency . 12 4.6.2 Digital 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 . 14 5 Technical requirements . 14 5.1 Frequency bands and channels . 14 5.2 Mode of reception . 15 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 SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 4 6.3.2.1 ac voltage and frequency . 16 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 Reference to standard DSC signals . 18 6.7.2 Standard DSC test signal 1 . 18 6.7.3 Standard DSC test signal 2 . 18 6.8 Measurement of symbol error rate . 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 . 19 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 General . 23 8.2 Calling sensitivity . 23 8.2.1 Definition . 23 8.2.2 Method of measurement . 23 8.2.3 Limits . 23 8.3 Adjacent channel selectivity . 23 8.3.1 Definition . 23 8.3.2 Method of measurement . 23 8.3.3 Limits . 24 8.4 Co-channel rejection. 24 8.4.1 Definition . 24 SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 5 8.4.2 Method of measurements . 24 8.4.3 Limits . 24 8.5 RF intermodulation response . 24 8.5.1 Definition . 24 8.5.2 Method of measurement . 24 8.5.3 Limits . 24 8.6 Spurious response rejection . 25 8.6.1 Definition . 25 8.6.2 Method of measurement . 25 8.6.3 Limits . 26 8.7 Blocking immunity . 26 8.7.1 Definition . 26 8.7.2 Method of measurement . 26 8.7.3 Limits . 26 8.8 Dynamic range . 26 8.8.1 Definition . 26 8.8.2 Method of measurement . 26 8.8.3 Limits . 26 8.9 Conducted spurious emissions into the antenna . 27 8.9.1 Definition . 27 8.9.2 Method of measurement . 27 8.9.3 Limits . 27 8.10 Radiated spurious emissions. 27 8.10.1 Definition . 27 8.10.2 Method of measurements . 27 8.10.3 Limit . 28 8.11 Protection of receiver antenna input circuits . 28 8.11.1 Definition . 28 8.11.2 Method of measurement . 28 8.11.3 Limits . 29 8.12 Scanning efficiency . 29 8.12.1 Definition . 29 8.12.2 Method of measurement . 29 8.12.3 Limits . 29 9 VHF watchkeeping receiver . 29 9.1 General . 29 9.2 Calling sensitivity . 29 9.2.1 Definition . 29 9.2.2 Method of measurement . 29 9.2.3 Limits . 30 9.3 Adjacent channel selectivity . 30 9.3.1 Definition . 30 9.3.2 Method of measurement . 30 9.3.3 Limits . 30 9.4 Co-channel rejection. 30 9.4.1 Definition . 30 9.4.2 Method of measurement . 30 9.4.3 Limits . 31 9.5 Intermodulation response . 31 9.5.1 Definition . 31 9.5.2 Method of measurement . 31 9.5.3 Limits . 31 9.6 Spurious response rejection . 31 9.6.1 Definition . 31 9.6.2 Method of measurement . 31 9.6.3 Limits . 32 9.7 Blocking immunity . 32 9.7.1 Definition . 32 9.7.2 Method of measurement . 32 9.7.3 Limits . 33 9.8 Dynamic range . 33 SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 6 9.8.1 Definition . 33 9.8.2 Method of measurement . 33 9.8.3 Limit . 33 9.9 Conducted spurious emissions into the antenna . 33 9.9.1 Definition . 33 9.9.2 Method of measurement . 33 9.9.3 Limit . 33 9.10 Radiated spurious emission . 34 9.10.1 Definition . 34 9.10.2 Method of measurements . 34 9.10.3 Limit . 35 Annex A (normative): Radiated measurements . 36 A.1 Test sites and general arrangements for measurements involving the use of radiated fields . 36 A.1.1 Outdoor test site . 36 A.1.2 Test antenna . 37 A.1.3 Substitution antenna . 37 A.1.4 Optional additional indoor site . 37 A.2 Guidance on the use of radiation test sites . 38 A.2.1 Measuring distance . 38 A.2.2 Test antenna . 38 A.2.3 Substitution antenna . 38 A.2.4 Artificial antenna . 39 A.2.5 Auxiliary cables . 39 A.2.6 Acoustic measuring arrangement . 39 A.3 Further optional alternative indoor test site using an anechoic chamber . 39 A.3.1 Example of the construction of a shielded anechoic chamber . 40 A.3.2 Influence of parasitic reflections in anechoic chambers . 40 A.3.3 Calibration of the shielded anechoic chamber . 41 Annex B (informative): Bibliography . 43 History . 44
ETSI ETSI EN 301 033 V1.4.1 (2013-09) 7 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://ipr.etsi.org). 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 (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). The present document may be referenced in the Marine Equipment Directive [i.9], Annex A.1 ("equipment for which detailed testing standards already exist in international instruments").
National transposition dates Date of adoption of this EN: 9 September 2013 Date of latest announcement of this EN (doa): 31 December 2013 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 June 2014 Date of withdrawal of any conflicting National Standard (dow): 30 June 2015
ETSI ETSI EN 301 033 V1.4.1 (2013-09) 8 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], Recommendation ITU-Rs M.493-13 [3], M.541-9 [9] and the IMO Resolutions A.803 (19) [i.5], A.804 (19) [i.6], A.806 (19) [i.7] and A.694 (17) [i.4]. 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 [i.8]. 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 300 338-2 [10], EN 301 925 [i.1] and EN 300 373-1 [i.3] respectively. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. [1] ITU Radio Regulations (2012). [2] Recommendation ITU-T 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] Recommendation ITU-R M.493-13: "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 (2010): "Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 1: Single talker and multiple listeners". [6] ETSI TR 100 028-1 (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics; Part 1". [7] Recommendation ITU-T V.11 (10/1996): "Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s". SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 9 [8] IEC 60417: "Graphical symbols for use on equipment". [9] Recommendation ITU-R M.541-9 (2004): "Operational procedures for the use of digital selective-calling equipment in the maritime mobile service". [10] ETSI EN 300 338-2: "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; Part 2: Class A/B DSC". 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] ETSI EN 301 925: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Radiotelephone transmitters and receivers for the maritime mobile service operating in VHF bands; Technical characteristics and methods of measurement". [i.2] Recommendation ITU-R SM.332-4 (1978): "Selectivity of receivers". [i.3] 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". [i.4] IMO Resolution A.694 (17): "General requirements for shipborne radio equipment forming part of the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids". [i.5] IMO Resolution A.803 (19) amended by MSC.68 (68): "Performance standards for shipborne VHF radio installations capable of voice communication and digital selective calling". [i.6] IMO Resolution A.804 (19) as amended by MSC.68 (68): "Performance Standards for Shipborne MF Radio Installations capable of Voice Communications and Digital Selective Calling". [i.7] IMO Resolution A.806 (19) as amended by MSC.68 (68): "Performance standards for shipborne MF/HF radio installations capable of voice communication, narrow-band direct-printing and digital selective calling". [i.8] International Convention for the Safety of Life at Sea (SOLAS) 1974, as amended. [i.9] Council Directive 96/98/EC of 20 December 1996 on marine equipment, as amended by Commission Directive 2011/75/EU. 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 SIST EN 301 033 V1.4.1:2013

ETSI ETSI EN 301 033 V1.4.1 (2013-09) 10 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 AGC Automatic Gain Control d.c. direct current DSC Digital Selective Calling e.m.f. electromotive force EUT Equipment Under Test 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 RF Radio Frequency SER Symbol Error Rate
SOLAS (International Convention for the) Safety Of Life At Sea VHF Very High Frequency 4 General and operational requirements 4.1 General The
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