Global maritime distress and safety system (GMDSS) - Part 7: Shipborne VHF radiotelephone transmitter and receiver - Operational and performance requirements, methods of testing and required test results

Specifies the minimum performance requirements, technical characteristics and methods of testing with required test results for VHF radio installations capable of voice communication and digital selective calling as required by the 1988 amendments to the 1974 International Convention for Safety of Life at Sea (SOLAS). Is associated with IEC 60945.

Système mondial de détresse et de sécurité en mer (SMDSM) - Partie 7: Emetteurs et récepteurs radiotéléphoniques en ondes métriques (VHF), à bord des navires - Exigences d'exploitation et de fonctionnement, méthodes d'essai et résultats d'essai exigés

Spécifie les exigences minimales de fonctionnement, les caractéristiques techniques et les méthodes d'essais, avec les résultats d'essai exigés pour les installations radio en ondes métriques aptes aux communications vocales et à l'appel sélectif numérique, comme exigé par les amendements de 1988 à la Convention I nternationale pour la sauvegarde de la vie humaine en mer de 1974 (SOLAS). Est associée à la CEI 60945.

General Information

Status
Published
Publication Date
23-Oct-1996
Current Stage
PPUB - Publication issued
Start Date
24-Oct-1996
Completion Date
15-Sep-1996
Ref Project

Relations

Standard
IEC 61097-7:1996 - Global maritime distress and safety system (GMDSS) - Part 7: Shipborne VHF radiotelephone transmitter and receiver - Operational and performance requirements, methods of testing and required test results
English and French language
77 pages
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Standard
IEC 61097-7:1996+AMD1:2018 CSV - Global maritime distress and safety system (GMDSS) - Part 7: Shipborne VHF radiotelephone transmitter and receiver - Operational and performance requirements, methods of testing and required test results Released:1/10/2018 Isbn:9782832252512
English and French language
144 pages
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Standards Content (Sample)


NORME
CEI
INTERNATIONALE
IEC
1097-7
INTERNATIONAL
Première édition
STANDARD
First edition
1996-10
Système mondial de détresse
et de sécurité en mer (SMDSM) –
Partie 7:
Emetteurs et récepteurs radiotéléphoniques
en ondes métriques (VHF), à bord des navires –
Exigences d’exploitation et de fonctionnement,
méthodes d’essai et résultats d’essai exigés
Global maritime distress and
safety system (GMDSS) –
Part 7:
Shipborne VHF radiotelephone transmitter
and receiver – Operational and performance
requirements, methods of testing and
required test results
Numéro de référence
Reference number
CEI/IEC 1097-7: 1996
Validité de la présente publication Validity of this publication
Le contenu technique des publications de la CEI est cons- The technical content of IEC publications is kept under
tamment revu par la CEI afin qu'il reflète l'état actuel de constant review by the IEC, thus ensuring that the content
la technique. reflects current technology.
Des renseignements relatifs à la date de reconfirmation de Information relating to the date of the reconfirmation of the
la publication sont disponibles auprès du Bureau Central de publication is available from the IEC Central Office.
la CEI.
Les renseignements relatifs à ces révisions, à l'établis- Information on the revision work, the issue of revised
sement des éditions révisées et aux amendements peuvent editions and amendments may be obtained from IEC
être obtenus auprès des Comités nationaux de la CEI et National Committees and from the following IEC
dans les documents ci-dessous: sources:
• Bulletin de la CEI • IEC Bulletin
• Annuaire de la CEI • IEC Yearbook
Publié annuellement Published yearly
• Catalogue des publications de la CEI • Catalogue of IEC publications
Publié annuellement et mis à jour régulièrement Published yearly with regular updates
Terminologie Terminology
En ce qui concerne la terminologie générale, le lecteur se For general terminology, readers are referred to IEC 50:
reportera à la CEI 50: Vocabulaire Electrotechnique Inter- International Electrotechnical Vocabulary (IEV), which is
national (VEI), qui se présente sous forme de chapitres issued in the form of separate chapters each dealing
séparés traitant chacun d'un sujet défini. Des détails with a specific field. Full details of the IEV will be
complets sur le VEI peuvent être obtenus sur demande. supplied on request. See also the IEC Multilingual
Voir également le dictionnaire multilingue de la CEI. Dictionary.
Les termes et définitions figurant dans la présente publi- The terms and definitions contained in the present publi-
cation ont été soit tirés du VEI, soit spécifiquement cation have either been taken from the IEV or have been
approuvés aux fins de cette publication. specifically approved for the purpose of this publication.
Symboles graphiques et littéraux Graphical and letter symbols
Pour les symboles graphiques, les symboles littéraux et les For graphical symbols, and letter symbols and signs
signes d'usage général approuvés par la CEI, le lecteur approved by the IEC for general use, readers are referred to
consultera: publications:
– la CEI 27: Symboles littéraux à utiliser en – IEC 27: Letter symbols to be used in electrical
électro-technique; technology;
– la CEI 417: Symboles graphiques utilisables – IEC 417: Graphical symbols for use on
sur le matériel. Index, relevé et compilation des equipment. Index, survey and compilation of the
feuilles individuelles; single sheets;
– la CEI 617: Symboles graphiques pour – IEC 617: Graphical symbols for diagrams;
schémas;
et pour les appareils électromédicaux, and for medical electrical equipment,
– la CEI 878: Symboles graphiques pour – IEC 878: Graphical symbols for electromedical
équipements électriques en pratique médicale. equipment in medical practice.
Les symboles et signes contenus dans la présente publi- The symbols and signs contained in the present publication
cation ont été soit tirés de la CEI 27, de la CEI 417, de la have either been taken from IEC 27, IEC 417, IEC 617
CEI 617 et/ou de la CEI 878, soit spécifiquement approuvés and/or IEC 878, or have been specifically approved for the
aux fins de cette publication. purpose of this publication.
Publications de la CEI établies par le IEC publications prepared by the same
même comité d'études technical committee
L'attention du lecteur est attirée sur les listes figurant à la fin The attention of readers is drawn to the end pages of this
de cette publication, qui énumèrent les publications de la publication which list the IEC publications issued by the
CEI préparées par le comité d'études qui a établi la technical committee which has prepared the present
présente publication. publication.

NORME
CEI
INTERNATIONALE
IEC
1097-7
INTERNATIONAL
Première édition
STANDARD
First edition
1996-10
Système mondial de détresse
et de sécurité en mer (SMDSM) –
Partie 7:
Emetteurs et récepteurs radiotéléphoniques
en ondes métriques (VHF), à bord des navires –
Exigences d’exploitation et de fonctionnement,
méthodes d’essai et résultats d’essai exigés
Global maritime distress and
safety system (GMDSS) –
Part 7:
Shipborne VHF radiotelephone transmitter
and receiver – Operational and performance
requirements, methods of testing and
required test results
 CEI 1996  Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized
utilisée sous quelque forme que ce soit et par aucun procédé, in any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission
microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher
Bureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève, Suisse
CODE PRIX
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International Electrotechnical Commission PRICE CODE
Pour prix, voir catalogue en vigueur
For price, see current catalogue

− 2 − 1097-7  CEI:1996
SOMMAIRE
Pages
AVANT-PROPOS . 4
Articles
1 Domaine d’application . 6
2 Références normatives . 6
3 Exigences de fonctionnement . 8
3.1 Introduction . 8
3.2 Généralités . 8
3.3 Exigences générales . 10
3.4 Exigences d'environnement et compatibilité électromagnétique . 18
4 Caractéristiques techniques . 18
4.1 Généralités . 18
4.2 Classes d'émission et caractéristiques de modulation . 18
4.3 Emetteur . 18
4.4 Récepteur . 20
4.5 Dispositif d'appel sélectif numérique (ASN) . 22
5 Méthodes d'essai et résultats d'essai exigés . 22
5.1 Conditions d'essai . 24
5.2 Conditions générales de mesure . 26
5.3 Exigences générales . 30
5.4 Emetteur . 32
5.5 Récepteur . 46
5.6 Fonctionnement en duplex . 62
5.7 Fonctionnement en appel sélectif numérique (ASN). 64
5.8 Compatibilité électromagnétique . 66
Figures
1 Ecart de fréquence autorisée de l'émetteur . 68
2 Disposition pour l'essai de comportement aux changements de fréquence . 69
3 Oscilloscope à mémoires, images en t , t et t . 70
1 2 3
4 Réponse du récepteur en fréquence audio . 71
Annexes
A Spécification de la mesure de puissance du récepteur . 72
B Bibliographie . 76

1097-7  IEC:1996 − 3 −
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope . 7
2 Normative references . 7
3 Performance requirements . 9
3.1 Introduction . 9
3.2 General . 9
3.3 General requirements . 11
3.4 Environmental requirements and electromagnetic compatibility . 19
4 Technical characteristics . 19
4.1 General . 19
4.2 Class of emission and modulation characteristics . 19
4.3 Transmitter . 19
4.4 Receiver . 21
4.5 DSC facility . 23
5 Methods of testing and required test results . 23
5.1 Test conditions . 25
5.2 General conditions of measurement . 27
5.3 General requirements . 31
5.4 Transmitter . 33
5.5 Receiver . 47
5.6 Duplex operation . 63
5.7 DSC operation . 65
5.8 Electromagnetic compatibility . 67
Figures
1 Transmitter permissible frequency deviation . 68
2 Test set-up for transient frequency behaviour. 69
3 Storage oscilloscope view t , t and t . 70
1 2 3
4 Receiver audiofrequency response . 71
Annexes
A Power measuring receiver specification . 73
B Bibliography . 77

− 4 − 1097-7  CEI:1996
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
________
SYSTÈME MONDIAL DE DÉTRESSE ET DE
SÉCURITÉ EN MER (SMDSM) –
Partie 7: Emetteurs et récepteurs radiotéléphoniques
en ondes métriques (VHF), à bord des navires –
Exigences d'exploitation et de fonctionnement,
méthodes d'essai et résultats d'essai exigés
AVANT-PROPOS
1) La CEI (Commission Electrotechnique Internationale) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les
domaines de l'électricité et de l'électronique. A cet effet, la CEI, entre autres activités, publie des Normes
Internationales. Leur élaboration est confiée à des comités d'études, aux travaux desquels tout Comité
national intéressé par le sujet traité peut participer. Les organisations internationales, gouvernementales et
non gouvernementales, en liaison avec la CEI, participent également aux travaux. La CEI collabore
étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des conditions fixées par accord
entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques, représentent, dans la
mesure du possible un accord international sur les sujets étudiés, étant donné que les Comités nationaux
intéressés sont représentés dans chaque comité d’études.
3) Les documents produits se présentent sous la forme de recommandations internationales. Ils sont publiés
comme normes, rapports techniques ou guides et agréés comme tels par les Comités nationaux.
4) Dans le but d'encourager l'unification internationale, les Comités nationaux de la CEI s'engagent à appliquer
de façon transparente, dans toute la mesure possible, les Normes internationales de la CEI dans leurs normes
nationales et régionales. Toute divergence entre la norme CEI et la norme nationale ou régionale
correspondante doit être indiquée en termes clairs dans cette dernière.
5) La CEI n’a fixé aucune procédure concernant le marquage comme indication d’approbation et sa
responsabilité n’est pas engagée quand un matériel est déclaré conforme à l’une de ses normes.
6) L’attention est attirée sur le fait que certains des éléments de la présente Norme internationale peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme Internationale CEI 1097-7 a été établie par le comité d'études 80 de la CEI: Matériels
et systèmes de navigation et de radiocommunication maritimes.
Le texte de cette norme est issu des documents suivants:
FDIS Rapport de vote
80/122/FDIS 80/132/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cette norme.
L'annexe A fait partie intégrante de cette norme.
L'annexe B est donnée uniquement à titre d'information.

1097-7  IEC:1996 − 5 −
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_________
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 7: Shipborne VHF radiotelephone transmitter and receiver –
Operational and performance requirements,
methods of testing and required test results
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international co-operation on all questions concerning standardization in the electrical and electronic
fields. To this end and in addition to other activities, the IEC publishes International Standards. Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt
with may participate in this preparatory work. International, governmental and non-governmental organizations
liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the
form of standards, technical reports or guides and they are accepted by the National Committees in that
sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the
subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 1097-7 has been prepared by IEC technical committee 80: Maritime
navigation and radiocommunication equipment and systems.
The text of this standard is based on the following documents:
FDIS Report on voting
80/122/FDIS 80/132/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
Annex A forms an integral part of this standard.
Annex B is for information only.

− 6 − 1097-7  CEI:1996
SYSTÈME MONDIAL DE DÉTRESSE ET DE
SÉCURITÉ EN MER (SMDSM) –
Partie 7: Emetteurs et récepteurs radiotéléphoniques
en ondes métriques (VHF), à bord des navires –
Exigences d'exploitation et de fonctionnement,
méthodes d'essai et résultats d'essai exigés
1 Domaine d’application
La présente partie de la CEI 1097 spécifie les exigences minimales de fonctionnement, les
caractéristiques techniques et les méthodes d'essais, avec les résultats d'essai exigés pour les
installations radio en ondes métriques aptes aux communications vocales et à l'appel sélectif
numérique, comme exigé par le chapitre IV des amendements de 1988 à la Convention
internationale pour la sauvegarde de la vie humaine en mer de 1974 (SOLAS), et qui est
associée à la CEI 945. Si une exigence de la présente norme diffère de la CEI 945, l'exigence
de la présente norme a priorité.
La présente norme inclut la partie utilisable des normes de fonctionnement incluses dans les
résolutions de l'OMI A.524(13) et A.803(19), les caractéristiques techniques incluses dans la
recommandation UIT-R M.489-2 (antérieurement, la recommandation 489-1); elle tient compte
de la résolution OMI A.694(17) et se conforme au règlement des radiocommunications (RR) de
l'UIT là où il s'applique.
NOTE − Tout texte de la présente norme dont les termes sont identiques aux résolutions OMI A.524(13) et
A.803(19) et à la recommandation UIT-R M.489-2 est imprimé en italique et les numéros de la résolution ou de
la recommandation et des articles sont indiqués entre parenthèses.
Les exigences concernant les récepteurs à appel sélectif numérique ou à veille, quand ils font
partie du matériel, se trouvent respectivement dans la CEI 1097-3 et dans la future CEI 1097-8.
2 Références normatives
Les documents normatifs suivants contiennent des dispositions qui, par suite de la référence
qui y est faite, constituent des dispositions valables pour la présente partie de la CEI 1097. Au
moment de la publication, les éditions indiquées étaient en vigueur. Tout document normatif est
sujet à révision, et les parties prenantes aux accords fondés sur la présente partie de la CEI
1097 sont invitées à rechercher la possibilité d'appliquer les éditions les plus récentes des
documents normatifs indiqués ci-après. Les membres de la CEI et de l'ISO possèdent le
registre des Normes internationales en vigueur.
CEI 945: 1994, Appareils de navigation maritime – Spécifications générales – Méthodes d'essai
et résultats exigibles
CEI 1097-3: 1994, Système mondial de détresse et de sécurité de mer (SMDSM) – Partie 3:
Matériels d'appel sélectif numérique (ASN) – Exigences d'exploitation et de fonctionnement,
méthodes d'essai et résultats exigibles
CEI 1162-1: 1995, Matériels et systèmes de navigation et de radiocommunication maritimes –
Interfaces numériques − Partie 1: Emetteur unique et récepteurs multiples

1097-7  IEC:1996 − 7 −
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 7: Shipborne VHF radiotelephone transmitter and receiver –
Operational and performance requirements,
methods of testing and required test results
1 Scope
This part of IEC 1097 specifies the minimum performance requirements, technical
characteristics and methods of testing with required test results for VHF radio installations
capable of voice communication and digital selective calling as required by chapter IV of the
1988 amendments to the 1974 International Convention for Safety of Life at Sea (SOLAS), and
which is associated with IEC 945. When a requirement in this standard is different from IEC
945, the requirement in this standard shall take precedence.
This standard incorporates the applicable part of the performance standards included in IMO
Resolution A.524(13) and A.803(19), the technical characteristics included in Recommendation
ITU-R M.489-2 (formerly CCIR Recommendation 489-1), and takes account of IMO Resolution
A.694(17), and conforms with the ITU Radio Regulations where applicable.
NOTE − All text of this standard, whose wording is identical to that in IMO Resolution A.524(13) and A.803(19)
and Recommendation ITU-R M.489-2 is printed in italics and the Resolution/Recommendation and clause
numbers are indicated in brackets.
The requirements for the DSC and/or watchkeeping receiver, when integrated in the equipment,
are in IEC 1097-3 and the future IEC 1097-8 respectively.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 1097. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 1097 are encouraged to investigate the possibility of applying the most
recent edition of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 945: 1994, Marine navigational equipment – General requirements – Methods of testing
and required test results
IEC 1097-3: 1994, Global maritime distress and safety system (GMDSS) – Part 3: Digital
selective calling (DSC) equipment – Operational and performance requirements, methods of
testing and required test results
IEC 1162-1: 1995, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 1: Single talker and multiple listeners

− 8 − 1097-7  CEI:1996
Convention Internationale OMI pour la sauvegarde de la vie humaine en mer (SOLAS): 1974,
modifiée en 1988 (SMDSM) – Chapitre IV: Radiocommunications
OMI Résolution A.524(13): 1983, Normes de fonctionnement des dispositifs de veille multiple à
ondes métriques
OMI Résolution A.694(17): 1991, Prescriptions générales applicables au matériel
radioélectrique de bord faisant partie du système mondial de détresse et de sécurité en mer et
aux aides électroniques à la navigation
OMI Résolution A.803(19): 1995, Normes de fonctionnement des installations radioélectriques
de bord à ondes métriques pour les communications vocales et l'appel sélectif numérique
UIT Règlement des radiocommunications: 1995, annexe S3: Tableau des niveaux maximaux de
puissance autorisés pour les émissions parasites
UIT Règlement des radiocommunications: 1990, annexe 18: Tableau des fréquences
d'émission dans la bande 156-174 MHz pour les stations de service mobile maritime
UIT-R M.489-2: 1995, Caractéristiques techniques des appareils radiotéléphoniques utilisés par
le service mobile maritime fonctionnant en ondes métriques avec un espacement de 25 kHz
entre voies adjacentes
UIT-T V.11: 1993: Caractéristiques électriques des circuits de jonction symétriques à double
courant fonctionnant à des débits binaires jusqu’à 10 Mbits/s
UIT-T V.24: 1993, Liste de définitions des circuits de jonction à l’interface entre l’équipement
terminal de traitement de données et l’équipement terminaison du circuit de données
UIT-T V.28: 1993, Caractéristiques électriques des circuits de jonction dissymétriques pour
transmission par double courant
3 Exigences de fonctionnement
3.1 Introduction
Les exigences de fonctionnement décrites dans le présent article sont spécifiées en se référant
aux résolutions de l'OMI et aux recommandations de l'UIT.
3.2 Généralités
3.2.1 (A.803(19)/1) L'installation à ondes métriques doit satisfaire non seulement aux
prescriptions du règlement des radiocommunications, aux dispositions des recommandations
pertinentes de l'UIT-R et aux prescriptions générales énoncées dans la résolution A.694(17) et
détaillées dans la CEI 945, mais aussi aux exigences ci-après et aux caractéristiques
techniques figurant à l'article 4 de la présente norme.
3.2.2 (A.803(19)/2.1) L'installation qui peut être composée de plusieurs appareils doit pouvoir
fonctionner sur des voies à une fréquence ou à deux fréquences ou sur ces deux types de
voies. Pour les voies à deux fréquences, le règlement des radiocommunications exige une
séparation de 4,6 MHz entre la fréquence d'émission et la fréquence de réception.

1097-7  IEC:1996 − 9 −
IMO International Convention for the Safety of Life At Sea (SOLAS): 1974, as amended in 1988
(GMDSS) – Chapter IV: Radiocommunications
IMO Resolution A.524(13):1983, Performance standards for VHF multiple watch facility
IMO Resolution A.694(17): 1991, General requirements for shipborne radio equipment forming
part of the global maritime distress and safety system (GMDSS) and for electronic navigational
aids
IMO Resolution A.803(19): 1995, Performance standards for shipborne VHF radio installations
capable of voice communication and digital selective calling
ITU Radio Regulations: 1995, Appendix S3: Table of maximum permitted spurious emission
power levels
ITU Radio Regulations: 1990, Appendix 18: Table of transmitting frequencies in the band 156-
174 MHz for stations in the maritime mobile service
ITU-R M.489-2: 1995, Technical characteristics of radiotelephone equipment operating in the
maritime mobile service in channels spaced by 25 kHz
ITU-T V.11: 1993, Electrical characteristics for balanced double-current interchange circuits
operating at data signalling rates up to 10 Mbit/s
ITU-T V.24: 1993, List of definitions for interchange circuits between data terminal equipment
(DTE) and data circuit terminating equipment (DCE)
ITU-T V.28: 1993, Electrical characteristics for unbalanced double-current interchange circuits
3 Performance requirements
3.1 Introduction
Performance requirements described in this clause are specified by referring to IMO
Resolutions and ITU Recommendations.
3.2 General
3.2.1 (A.803(19)/1) The VHF radio installation, in addition to meeting the requirements of the
Radio Regulations, the relevant ITU-R Recommendations and the general requirements set out
in Resolution A.694(17) and detailed in IEC 945, shall comply with the following requirements
and with the technical characteristics contained in clause 4 of this standard.
3.2.2 (A.803(19)/2.1) The installation, which may consist of more than one piece of
equipment, shall be capable of operating on single-frequency channels or on single or two-
frequency channels. For two-frequency channels the Radio Regulations require a separation of
4,6 MHz between the transmitting frequency and the receiving frequency.

− 10 − 1097-7  CEI:1996
3.2.3 (A.803(19)/2.2) Le matériel doit permettre d'écouler les catégories d'appel ci-après
aussi bien en téléphonie que par appel sélectif numérique (ASN):
.1 détresse, urgence et sécurité;
.2 besoins liés à l'exploitation du navire; et
.3 correspondance publique.
3.2.4 (A.803(19)/2.3) Le matériel doit permettre d'écouler les catégories de communications ci-
après en téléphonie:
.1 détresse, urgence et sécurité;
.2 besoins liés à l'exploitation du navire; et
.3 correspondance publique.
3.3 Exigences générales
3.3.1 Composition
3.3.1.1 (A.803(19)/2.4) Le matériel doit comprendre au moins:
.1 un émetteur/récepteur, antenne comprise;
.2 un organe de commande intégré ou un ou plusieurs organes de commande indépendants;
.3 un microphone doté d'un commutateur d'émission, qui peut être associé à un combiné
téléphonique;
.4 un haut-parleur interne ou externe;
.5 un dispositif d'appel sélectif numérique intégré ou autonome; et
.6 un dispositif ASN spécialisé assurant la veille en permanence sur la voie 70.
3.3.1.2 (A.803(19)/2.5) L'installation peut également comporter des récepteurs supplé-
mentaires.
3.3.2 Commandes et indicateurs
3.3.2.1 (A.803(19)/4.1.3) Un interrupteur doit être prévu pour l'ensemble et une indication
visuelle fournie lorsque cette installation est sous tension.
3.3.2.2 (A.803(19)/4.2.1) Le passage du mode d'émission au mode de réception doit pouvoir
se faire au moyen d'un commutateur (à pression). Des moyens peuvent en outre être mis en
place pour permettre le fonctionnement sur des voies à deux fréquences sans commande
manuelle.
3.3.2.3 (A.803(19)/4.2.2) Le récepteur doit être doté d'une commande manuelle de volume
permettant de faire varier la puissance de sortie des signaux acoustiques.
3.3.2.4 (A.803(19)/4.2.3) Le matériel doit être pourvu, à l'extérieur, d'une commande de
réglage du dispositif de silence en l’absence de signal.
3.3.2.5 (A.803(19)/4.1.5) Le matériel doit indiquer le numéro de la voie, suivant le tableau
donné dans le règlement des radiocommunications, sur laquelle il est réglé. Le numéro de la
voie doit être lisible quelles que soient les conditions d'éclairage extérieur. Lorsque cela est
doivent être signalées de manière distincte.
possible, les voies 16 et 70
1097-7  IEC:1996 − 11 −
3.2.3 (A.803(19)/2.2) The equipment shall provide for the following categories of calls using
both voice and digital selective calling (DSC):
.1 distress, urgency and safety;
.2 ship operational requirements; and
.3 public correspondence.
3.2.4 (A.803(19)/2.3) The equipment shall provide for the following categories of
communication using voice:
.1 distress, urgency and safety;
.2 ship operational requirements; and
.3 public correspondence.
3.3 General requirements
3.3.1 Composition
3.3.1.1 (A.803(19)/2.4) The equipment shall comprise at least:
.1 a transmitter/receiver including antenna;
.2 an integral control unit or one or more separate control units;
.3 a microphone with a press-to-transmit switch, which may be combined with a telephone
in a handset;
.4 an internal or external loudspeaker;
.5 an integral or separate digital selective calling facility; and
.6 a dedicated DSC watchkeeping facility to maintain a continuous watch on channel 70.
3.3.1.2 (A.803(19)/2.5) The installation may also include additional receivers.
3.3.2 Controls and indicators
3.3.2.1 (A.803(19)/4.1.3) An on/off switch shall be provided for the entire installation with a
visual indication that the installation is switched on.
3.3.2.2 (A.803(19)/4.2.1) Provision shall be made for changing from transmission to reception
by use of a press-to-transmit switch. Additionally, facilities for operation on two-frequency
channels without manual control may be provided.
3.3.2.3 (A.803(19)/4.2.2) The receiver shall be provided with a manual volume control by
which the audio output may be varied.
3.3.2.4 (A.803(19)/4.2.3) A squelch (mute) control shall be provided on the exterior of the
equipment.
3.3.2.5 (A.803(19)/4.1.5) The equipment shall indicate the channel number, as given in the
Radio Regulations, to which it is tuned. It shall allow the determination of the channel number
under all conditions of external lighting. Where practicable, channels 16 and 70 shall be
distinctively marked.
− 12 − 1097-7  CEI:1996
3.3.2.6 (A.803(19)/4.1.4) Il faut prévoir un voyant indiquant que l'émission de la porteuse est
en cours.
3.3.2.7 (A.803(19)/4.1.6) Le matériel doit pouvoir être commandé depuis le poste de navi-
gation habituel du navire. Ce poste de commande doit avoir priorité sur les autres organes de
commande, s'il en existe. Lorsqu'il existe plus d'un organe de commande, le signal indiquant
que le matériel est en marche doit apparaître à l'emplacement de chacun des organes de
commande.
3.3.2.8 Le choix de la voie à l'aide d'un pavé numérique ne doit pas nécessiter plus que de
composer les numéros des voies désirées.
3.3.2.9 Le changement de fréquence, sauf pour l'appel sélectif numérique automatique et le
fonctionnement de la veille sur plusieurs voies, ne peut être opéré qu'à l'aide du sélecteur de
voies.
3.3.2.10 (A.803(19)/2.6) Une alerte de détresse doit être activée seulement au moyen d'un
bouton affecté à la détresse. Ce bouton ne devrait pas être un des plots d'un panneau d'entrée
numérique type UIT-T ou ISO fourni avec le matériel.
Le bouton affecté à la détresse doit:
3.3.2.11 (A.803(19)/2.7)
.1 être clairement identifié et
.2 être protégé contre toute utilisation intempestive
3.3.2.12 (A.803(19)/2.8) La mise en marche de l'alerte de détresse doit exiger au moins deux
actions indépendantes.
3.3.2.13 (A.803(19)/2.9) Le matériel doit indiquer l'état d'émission de l'alerte de détresse.
3.3.2.14 (A.803(19)/2.10) Il doit être possible d'arrêter ou de mettre en marche les alertes de
détresse à tout moment.
3.3.3 Haut-parleur et combiné téléphonique
3.3.3.1 (A.803(19)/10.1) La sortie du récepteur doit pouvoir être utilisée avec un haut-parleur
et/ou un combiné téléphonique. La puissance de sortie des signaux acoustiques doit être suffi-
sante pour que les signaux puissent être entendus compte tenu des bruits ambiants que l'on
peut s'attendre à rencontrer à bord des navires.
3.3.3.2 (A.803(19)/10.2) Il doit être possible de mettre le haut-parleur hors circuit sans nuire à
la puissance de sortie des signaux acoustiques du combiné téléphonique, s'il y en a un.
3.3.3.3 (A.803(19)/10.3) Lorsque l'émission est effectuée en mode simplex, la puissance de
sortie du récepteur doit être neutralisée pendant l'émission.
3.3.4 Temps de commutation
3.3.4.1 (A.803(19)/4.1.1) Il doit être possible de changer de voie le plus rapidement possible,
et, en tout cas, en 5 s au maximum.
3.3.4.2 (A.803(19)/4.1.2) Le temps nécessaire pour passer du mode d'émission au mode de
réception, et, inversement, ne doit pas dépasser 0,3 s.

1097-7  IEC:1996 − 13 −
3.3.2.6 (A.803(19)/4.1.4) A visual indication that the carrier is being transmitted shall be
provided.
3.3.2.7 (A.803(19)/4.1.6) Control of the equipment shall be possible at the position from
which the ship is normally navigated. Control from that position shall have priority if additional
control units are provided. When there is more than one control unit, indication shall be given to
the other units that the equipment is in operation.
3.3.2.8 Channel selection by a digital input panel shall require only to key the desired channel
numbers.
3.3.2.9 Change of frequencies, except for automatic DSC or multiple watch operation may be
initiated by channel selector controls only.
3.3.2.10 (A.803(19)/2.6) A distress alert shall be activated only by means of a dedicated
distress button. This button shall not be any key of an ITU-T digital input panel or an ISO
keyboard provided on the equipment.
3.3.2.11 (A.803(19)/2.7) The dedicated distress button shall:
.1 be clearly identified; and
.2 be protected against inadvertent operation.

3.3.2.12 (A.803(19)/2.8)The distress alert initiation shall require at least two independent
actions.
3.3.2.13 (A.803(19)/2.9)The equipment shall indicate the status of the distress alert
transmission.
3.3.2.14 (A.803(19)/2.10)It shall be possible to interrupt and initiate distress alerts at any
time.
3.3.3 Loudspeaker and handset
3.3.3.1 (A.803(19)/10.1) The receiver output shall be suitable for use with a loudspeaker
and/or a telephone handset. The audio output shall be sufficient to be heard in the ambient
noise level likely to be encountered on board ships.
3.3.3.2 (A.803(19)/10.2) It shall be possible to switch off the loudspeaker without affecting
the audio output of the telephone handset, if provided.
3.3.3.3 (A.803(19)/10.3) In the transmit condition during simplex operation the output of the
receiver shall be muted.
3.3.4 Switching time
3.3.4.1 (A.803(19)/4.1.1) Change of channel shall be capable of being made as rapidly as
possible, but in any event within 5 s.
3.3.4.2 (A.803(19)/4.1.2) The time taken to switch from the transmit to the receive condition,
and vice versa, shall not exceed 0,3 s.

− 14 − 1097-7  CEI:1996
3.3.5 Mesures de sécurité
(A.803(19)/6) Le matériel ne doit subir aucune détérioration lorsqu'il fonctionne, par suite de la
mise en circuit ouvert ou en court-circuit de bornes d'antenne.
3.3.6 Bandes de fréquence
3.3.6.1 (A.803(19)/3.1) Le matériel doit être conçu de manière à pourvoir fonctionner sur une
ou plusieurs voies, ces voies étant choisies parmi celles de l'appendice 18 du règlement des
radiocommunications et en application des dispositions de ce même appendice.
3.3.6.2 (A.803(19)/3.2) Le matériel doit pouvoir fonctionner de la manière suivante:
.1 dans la bande 156,3–156,875 MHz sur les voies à une fréquence indiquées à l'appen-
dice 18 du règlement des radiocommunications, comprenant au moins 156,3 MHz (voie 6),
156,65 MHz (voie 13), 156,8 MHz (voie 16) et 156,525 MHz (voie 70);
.2 dans la bande 156,025–157,425 MHz pour l'émission et dans la bande 160,625−
162,025 MHz pour la réception sur les voies à deux fréquences indiquées à l'appendice 18
du règlement des radiocommunications; et
.3 le matériel doit être conçu de façon que l'emploi de la voie 70 pour une utilisation autre
que l'appel sélectif numérique soit interdit.
3.3.7 Marquage et identification
Le marquage et l'identification doivent être conformes aux prescriptions de la CEI 945.
3.3.8 Durée d'échauffement
(A.803(19)/5 Le matériel doit être opérationnel dans la minute qui suit sa mise en marche.
3.3.9 Dispositif d'appel sélectif numérique (ASN)
(A.803(19)/3.3) Le dispositif d'appel sélectif numérique doit pouvoir fonctionner au moins sur la
voie 70 et se conformer aux prescriptions de la CEI 1097-3.
Le dispositif d'appel sélectif numérique peut être physiquement incorporé dans le matériel ou
constituer un élément indépendant.
3.3.9.1 Signaux d'entrée et de sortie de l'appel sélectif numérique (ASN)
Si le dispositif d'ASN n'est pas intégré, le matériel doit présenter des impédances d'entrée et
de sortie des signaux ASN de 600 Ω, symétriques et isolées de la terre, avec un niveau de
circuit intérieur réglable à 0,775 V (efficace) ±10 dB pour la connexion aux bornes audio d'un
dispositif ASN indépendant.
Alternativement, une entrée et une sortie peuvent être prévues pour des signaux ASN binaires
à des niveaux logiques. Les caractéristiques électriques de l'entrée et de la sortie doivent être
compatibles avec l'UIT-T V.11 et la définition des fonctions doit suivre les prescriptions de la
CEI 1162-1. L'état B doit être l'état logique «0», et l'état Y doit être l'état logique «1».
En outre, les signaux ASN peuvent se présenter sous forme de signaux V.24/V.28 (EIA-232-D).

1097-7  IEC:1996 − 15 −
3.3.5 Safety precautions
(A.803(19)/6) The equipment, when operating, shall not be damaged by the effects of open-
circuited or short-circuited antenna terminals.
3.3.6 Frequency bands
3.3.6.1 (A.803(19)/3.1) The equipment shall be designated for operation on one or more
channels selected from and in accordance with appendix 18 of the Radio Regulations.
3.3.6.2 (A.803(19)/3.2) The equipment shall be capable of operating as follows:
.1 in the band 156,3 MHz to 156,875 MHz on single-frequency channels as specified in
appendix 18 to the Radio Regulations including at least 156,3 MHz (CH 6),
156,65 MHz (CH 13), 156,8 MHz (CH 16), and 156,525 MHz (CH 70);
.2 in the band 156,025 MHz to 157,425 MHz for transmitting and the band 160,625 MHz to
162,025 MHz for receiving on two-frequency channels as specified in appendix 18 to the
Radio Regulations; and
.3 the equipment shall be so designed that the use of channel 70 for purpose other than
DSC is prevented.
3.3.7 Marking and identification
Marking and identification shall be in accordance with IEC 945.
Warming-up period
3.3.8
(A.803(19)/5) The equipment shall be operational within 1 min of switching on.
3.3.9 DSC facilities
(A.803(19)/3.3) The digital selective calling facility shall be at least capable of operating on
channel 70, and conform to the requirements of IEC 1097-3.
The DSC facility may be physically integrated into the equipment or form an independent unit.
3.3.9.1 DSC signal input and output
If the DSC facility is not integrated, the equipment shall have DSC signal input and output
impedances of 600 Ω, symmetrical and free of earth, with a closed-circuit level adjustable to
0,775 V (r.m.s.) ±10 dB for connection to the AF terminals of an independent DSC facility.
Alternatively, an input and output may be provided for DSC signals at logic levels. The
electrical characteristics of the input and output shall be compatible with ITU-T V.11 and the
definition of functions shall comply with IEC 1162-1. The B-state shall be the logic "0”, and the
Y-state shall be the logic "1".
Additionally, DSC signals may be provided with V.24/V.28 signals (EIA-232-D).

− 16 − 1097-7  CEI:1996
3.3.9.2 Interface d’imprimante
Pour le matériel comportant un dispositif ASN intégré, les caractéristiques électriques d'une
sortie ou interface vers une imprimante externe, si cela est nécessaire, doivent être du type
CENTRONICS, ou être compatibles avec l'UIT-T V.28, et la définition de la fonction doit se
conformer à l'UIT-T V.24. D'autres types d'interfaces d'imprimantes peuvent être fournies à
volonté.
3.3.9.3 Interfaces de données
Pour le matériel comportant un dispositif ASN intégré, les interfaces de données, si elles sont
fournies, pour la connexion aux aides électroniques à la navigation, doivent être compatibles
avec la CEI 1162-1.
Si le dispositif ASN n'est pas intégré, le matériel doit avoir des interfaces de données pour les
besoins de la commande radio compatibles avec la CEI 1162-1. Le matériel faisant partie des
parties d'une installation radio spécifique, peut, en remplacement, utiliser d'autres protocoles
pour la commande radio.
3.3.10 Dispositifs de veille multiple
(A.524(13)/1) Le matériel radiotél
...


IEC 61097-7 ®
Edition 1.1 2018-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Global maritime distress and safety system (GMDSS) –
Part 7: Shipborne VHF radiotelephone transmitter and receiver – Operational and
performance requirements, methods of testing and required test results

Système mondial de détresse et de sécurité en mer (SMDSM) –
Partie 7: Emetteurs et récepteurs radiotéléphoniques en ondes métriques (VHF),
à bord des navires – Exigences d’exploitation et de fonctionnement, méthodes
d’essai et résultats d’essai exigés

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IEC 61097-7 ®
Edition 1.1 2018-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Global maritime distress and safety system (GMDSS) –

Part 7: Shipborne VHF radiotelephone transmitter and receiver – Operational

and performance requirements, methods of testing and required test results

Système mondial de détresse et de sécurité en mer (SMDSM) –

Partie 7: Emetteurs et récepteurs radiotéléphoniques en ondes métriques (VHF),

à bord des navires – Exigences d’exploitation et de fonctionnement, méthodes

d’essai et résultats d’essai exigés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-5251-2

IEC 61097-7 ®
Edition 1.1 2018-01
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Global maritime distress and safety system (GMDSS) –
Part 7: Shipborne VHF radiotelephone transmitter and receiver – Operational and
performance requirements, methods of testing and required test results

Système mondial de détresse et de sécurité en mer (SMDSM) –
Partie 7: Emetteurs et récepteurs radiotéléphoniques en ondes métriques (VHF),
à bord des navires – Exigences d’exploitation et de fonctionnement, méthodes
d’essai et résultats d’essai exigés

– 2 – IEC 61097-7:1996+AMD1:2018 CSV
© IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Performance requirements . 6
3.1 Introduction. 6
3.2 General. 6
3.3 General requirements . 7
3.4 Environmental requirements and electromagnetic compatibility . 10
4 Technical characteristics . 10
4.1 General. 10
4.2 Class of emission and modulation characteristics . 11
4.3 Transmitter . 11
4.4 Receiver . 11
4.5 DSC facility . 12
5 Methods of testing and required test results . 13
5.1 Test conditions . 13
5.2 General conditions of measurement . 14
5.3 General requirements . 16
5.4 Transmitter . 16
5.5 Receiver . 23
5.6 Duplex operation . 31
5.7 (3.3.9, 4.5) DSC operation . 32
5.8 (3.4) Electromagnetic compatibility . 32
Annex A (normative) . 36
Annex B (informative) Bibliography . 38

Figure 1 – Transmitter permissible frequency deviation . 33
Figure 2 – Test set-up for measuring transient frequency behaviour . 33
Figure 3 – Storage oscilloscope view t , t and t . 34
1 2 3
Figure 4 – Receiver audiofrequency response . 35
Figure A.1 – IF filter specification . 36

Table A.1 – Selectivity characteristic . 36
Table A.2 – Attenuation points close to carrier . 37
Table A.3 – Attenuation points distant from carrier . 37

© IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_________
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –
Part 7: Shipborne VHF radiotelephone transmitter and receiver –
Operational and performance requirements,
methods of testing and required test results
FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 61097-7 edition 1.1 contains the first edition (1996-10) [documents 80/122/FDIS and 80/132/
RVD] and its amendment 1 (2018-01) [documents 80/849/CDV and 80/869/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text. A
separate Final version with all changes accepted is available in this publication.

– 4 – IEC 61097-7:1996+AMD1:2018 CSV
© IEC 2018
Annex A forms an integral part of this standard.
Annex B is for information only.
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

© IEC 2018
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) –

Part 7: Shipborne VHF radiotelephone transmitter and receiver –
Operational and performance requirements,
methods of testing and required test results

1 Scope
This part of IEC 61097 specifies the minimum performance requirements, technical
characteristics and methods of testing with required test results for VHF radio installations
capable of voice communication and digital selective calling as required by chapter IV of the
1988 amendments to the 1974 International Convention for Safety of Life at Sea (SOLAS), and
which is associated with IEC 60945. When a requirement in this standard is different from IEC
60945, the requirement in this standard shall take precedence.
This standard incorporates the applicable part of the performance standards included in IMO
Resolution A.524(13) and A.803(19), the technical characteristics included in Recommendation
ITU-R M.489-2 (formerly CCIR Recommendation 489-1), and takes account of IMO Resolution
A.694(17), and conforms with the ITU Radio Regulations where applicable.
NOTE − All text of this standard, whose wording is identical to that in IMO Resolution A.524(13) and A.803(19)
and Recommendation ITU-R M.489-2 is printed in italics and the Resolution/Recommendation and clause
numbers are indicated in brackets.
The requirements for the DSC and/or watchkeeping receiver, when integrated in the
equipment, are in IEC 61097-3 and the future IEC 61097-8 respectively.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61097. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61097 are encouraged to investigate the possibility of applying the most
recent edition of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60945:1994, Marine navigational equipment – General requirements – Methods of testing
and required test results
IEC 61097-3:1994, Global maritime distress and safety system (GMDSS) – Part 3: Digital
selective calling (DSC) equipment – Operational and performance requirements, methods of
testing and required test results
IEC 61162-1:1995, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 1: Single talker and multiple listeners
IMO International Convention for the Safety of Life At Sea (SOLAS): 1974, as amended in 1988
(GMDSS) – Chapter IV: Radiocommunications
IMO Resolution A.524(13):1983, Performance standards for VHF multiple watch facility

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© IEC 2018
IMO Resolution A.694(17): 1991, General requirements for shipborne radio equipment forming
part of the global maritime distress and safety system (GMDSS) and for electronic navigational
aids
IMO Resolution A.803(19): 1995, Performance standards for shipborne VHF radio installations
capable of voice communication and digital selective calling
ITU Radio Regulations: 1995, Appendix S3: Table of maximum permitted spurious emission
power levels
ITU Radio Regulations: 1990, Appendix 18: Table of transmitting frequencies in the band 156-
174 MHz for stations in the maritime mobile service
ITU-R M.489-2: 1995, Technical characteristics of radiotelephone equipment operating in the
maritime mobile service in channels spaced by 25 kHz
ITU-T V.11: 1993, Electrical characteristics for balanced double-current interchange circuits
operating at data signalling rates up to 10 Mbit/s
ITU-T V.24: 1993, List of definitions for interchange circuits between data terminal equipment
(DTE) and data circuit terminating equipment (DCE)
ITU-T V.28: 1993, Electrical characteristics for unbalanced double-current interchange circuits
3 Performance requirements
3.1 Introduction
Performance requirements described in this clause are specified by referring to IMO
Resolutions and ITU Recommendations.
3.2 General
3.2.1 (A.803(19)/1) The VHF radio installation, in addition to meeting the requirements of the
Radio Regulations, the relevant ITU-R Recommendations and the general requirements set out
in Resolution A.694(17) and detailed in IEC 60945, shall comply with the following
requirements and with the technical characteristics contained in clause 4 of this standard.
3.2.2 (A.803(19)/2.1) The installation, which may consist of more than one piece of
equipment, shall be capable of operating on single-frequency channels or on single or two-
frequency channels. For two-frequency channels the Radio Regulations require a separation of
4,6 MHz between the transmitting frequency and the receiving frequency.
3.2.3 (A.803(19)/2.2) The equipment shall provide for the following categories of calls using
both voice and digital selective calling (DSC):
.1 distress, urgency and safety;
.2 ship operational requirements; and
.3 public correspondence.
3.2.4 (A.803(19)/2.3) The equipment shall provide for the following categories of
communication using voice:
.1 distress, urgency and safety;
.2 ship operational requirements; and

© IEC 2018
.3 public correspondence.
3.3 General requirements
3.3.1 Composition
3.3.1.1 (A.803(19)/2.4) The equipment shall comprise at least:
.1 a transmitter/receiver including antenna;
.2 an integral control unit or one or more separate control units;
.3 a microphone with a press-to-transmit switch, which may be combined with a telephone
in a handset;
.4 an internal or external loudspeaker;
.5 an integral or separate digital selective calling facility; and
.6 a dedicated DSC watchkeeping facility to maintain a continuous watch on channel 70.
3.3.1.2 (A.803(19)/2.5) The installation may also include additional receivers.
3.3.2 Controls and indicators
3.3.2.1 (A.803(19)/4.1.3) An on/off switch shall be provided for the entire installation with a
visual indication that the installation is switched on.
3.3.2.2 (A.803(19)/4.2.1) Provision shall be made for changing from transmission to reception
by use of a press-to-transmit switch. Additionally, facilities for operation on two-frequency
channels without manual control may be provided.
3.3.2.3 (A.803(19)/4.2.2) The receiver shall be provided with a manual volume control by
which the audio output may be varied.
3.3.2.4 (A.803(19)/4.2.3) A squelch (mute) control shall be provided on the exterior of the
equipment.
3.3.2.5 (A.803(19)/4.1.5) The equipment shall indicate the channel number, as given in the
Radio Regulations, to which it is tuned. It shall allow the determination of the channel number
under all conditions of external lighting. Where practicable, channels 16 and 70 shall be
distinctively marked.
3.3.2.6 (A.803(19)/4.1.4) A visual indication that the carrier is being transmitted shall be
provided.
3.3.2.7 (A.803(19)/4.1.6) Control of the equipment shall be possible at the position from
which the ship is normally navigated. Control from that position shall have priority if additional
control units are provided. When there is more than one control unit, indication shall be given
to the other units that the equipment is in operation.
3.3.2.8 Channel selection by a digital input panel shall require only to key the desired channel
numbers.
3.3.2.9 Change of frequencies, except for automatic DSC or multiple watch operation may be
initiated by channel selector controls only.
3.3.2.10 (A.803(19)/2.6) A distress alert shall be activated only by means of a dedicated
distress button. This button shall not be any key of an ITU-T digital input panel or an ISO
keyboard provided on the equipment.

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3.3.2.11 (A.803(19)/2.7) The dedicated distress button shall:
.1 be clearly identified; and
.2 be protected against inadvertent operation.

3.3.2.12 (A.803(19)/2.8)The distress alert initiation shall require at least two independent
actions.
3.3.2.13 (A.803(19)/2.9)The equipment shall indicate the status of the distress alert
transmission.
3.3.2.14 (A.803(19)/2.10)It shall be possible to interrupt and initiate distress alerts at any
time.
3.3.3 Loudspeaker and handset
3.3.3.1 (A.803(19)/10.1) The receiver output shall be suitable for use with a loudspeaker
and/or a telephone handset. The audio output shall be sufficient to be heard in the ambient
noise level likely to be encountered on board ships.
3.3.3.2 (A.803(19)/10.2) It shall be possible to switch off the loudspeaker without affecting
the audio output of the telephone handset, if provided.
3.3.3.3 (A.803(19)/10.3) In the transmit condition during simplex operation the output of the
receiver shall be muted.
3.3.4 Switching time
3.3.4.1 (A.803(19)/4.1.1) Change of channel shall be capable of being made as rapidly as
possible, but in any event within 5 s.
3.3.4.2 (A.803(19)/4.1.2) The time taken to switch from the transmit to the receive condition,
and vice versa, shall not exceed 0,3 s.
3.3.5 Safety precautions
(A.803(19)/6) The equipment, when operating, shall not be damaged by the effects of open-
circuited or short-circuited antenna terminals.
3.3.6 Frequency bands
3.3.6.1 (A.803(19)/3.1) The equipment shall be designated for operation on one or more
channels selected from and in accordance with appendix 18 of the Radio Regulations.
3.3.6.2 (A.803(19)/3.2) The equipment shall be capable of operating as follows:
.1 in the band 156,3 MHz to 156,875 MHz on single-frequency channels as specified in
appendix 18 to the Radio Regulations including at least 156,3 MHz (CH 6),
156,65 MHz (CH 13), 156,8 MHz (CH 16), and 156,525 MHz (CH 70);
.2 in the band 156,025 MHz to 157,425 MHz for transmitting and the band 160,625 MHz to
162,025 MHz for receiving on two-frequency channels as specified in appendix 18 to the
Radio Regulations; and
.3 the equipment shall be so designed that the use of channel 70 for purpose other than
DSC is prevented.
© IEC 2018
3.3.7 Marking and identification
Marking and identification shall be in accordance with IEC 60945.
3.3.8 Warming-up period
(A.803(19)/5) The equipment shall be operational within 1 min of switching on.
3.3.9 DSC facilities
(A.803(19)/3.3) The digital selective calling facility shall be at least capable of operating on
channel 70, and conform to the requirements of IEC 61097-3.
The DSC facility may be physically integrated into the equipment or form an independent unit.
3.3.9.1 DSC signal input and output
If the DSC facility is not integrated, the equipment shall have DSC signal input and output
impedances of 600 Ω, symmetrical and free of earth, with a closed-circuit level adjustable to
0,775 V (r.m.s.) ±10 dB for connection to the AF terminals of an independent DSC facility.
Alternatively, an input and output may be provided for DSC signals at logic levels. The
electrical characteristics of the input and output shall be compatible with ITU-T V.11 and the
definition of functions shall comply with IEC 61162-1. The B-state shall be the logic "0”, and the
Y-state shall be the logic "1".
Additionally, DSC signals may be provided with V.24/V.28 signals (EIA-232-D).
3.3.9.2 Printer interface
For equipment with an integrated DSC facility, the electrical characteristics of an
interface/output for an external printer, if required, shall be a CENTRONICS type
interface/output or be compatible with ITU-T V.28 and the definition of function shall comply
with ITU-T V.24. Voluntarily other types of printer interfaces may be provided.
3.3.9.3 Data interface
For equipment with an integrated DSC facility, data interfaces, if provided, for the connection of
electronic navigational aids shall be compatible with IEC 61162-1.
If the DSC facility is not integrated, the equipment shall have data interfaces for radio control
purposes compatible with IEC 61162-1. Equipment forming integral parts of a specific radio
installation only, may instead utilize other protocols for radio control purposes.
3.3.10 Multiple watch facilities
(A.524(13)/1) VHF radiotelephone equipment having multiple watch facilities shall comply with
the following requirements:
3.3.10.1 (A.524(13)/2.1) The equipment shall include a provision for the automatic scanning
of a priority channel and one additional channel only.
3.3.10.2 (A.524(13)/2.2) The priority channel is that channel which will be sampled even if
there is a signal on the additional channel and on which the receiver will lock during the time a
signal is detected.
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© IEC 2018
3.3.10.3 (A.524(13)/2.3) The additional channel is that channel which will be monitored
during the periods the equipment is not sampling or receiving signals on the priority channel.
3.3.10.4 (A.524(13)/2.4) Provision shall be included to switch the scanning facility on and off
by means of a manually operated control. In addition it shall be ensured that the receiver
remains on the same channel as the transmitter for the entire duration of any communication
with the ship, e.g. the scanning facility shall be switched off automatically when the handset is
off its hook. The scanning facility shall be switched on automatically when the handset is
replaced on its hook.
3.3.10.5 (A.524(13)/2.5) Selection of the additional channel and, if provided, of the priority
channel shall be possible at the operating position of the equipment. If the selection of the
priority channel is not provided, the priority channel shall be channel 16.
3.3.10.6 (A.524(13)/2.6) When the scanning facility is in operation, the channel number of
both channels on which the equipment is operating shall be clearly indicated simultaneously.
3.3.10.7 (A.524(13)/2.7) In a transceiver, transmission shall not be possible when the
scanning facility is operating. When the scanning facility is switched off, both transmitter and
receiver shall be tuned automatically to the selected additional channel.
3.3.10.8 (A.524(13)/2.8) A transceiver shall be provided with a single manual control (e.g.
push-button) in order to switch the equipment quickly for operation on the priority channel.
3.3.10.9 (A.524(13)/2.9) At the operating position of a transceiver the selected additional
channel shall be clearly indicated as being the operational channel of this receiver.
3.4 Environmental requirements and electromagnetic compatibility
Unless otherwise stated in this standard, the equipment shall comply with the requirements of
the environmental and electromagnetic conditions specified in IEC 60945.
4 Technical characteristics
4.1 General
4.1.1 The equipment shall be designed to operate satisfactorily with a channel separation of
25 kHz in accordance with appendix 18 of the Radio Regulations.
4.1.2 (A.803(19)/4.1.7) The equipment shall not be able to transmit during channel switching
operation.
4.1.3 (A.803(19)/4.1.8) Operation of the transmit/receive control shall not cause unwanted
emissions.
4.1.4 (489-2/1.1.4) Where duplex or semi-duplex systems are in use, the performance of the
equipment shall continue to comply with the requirements of this standard.
4.1.5 When using digital selective calling the equipment shall have the following capabilities:
*
.1 sensing to determine the presence of a signal on 156,525 MHz (CH 70); and
.2 automatic prevention of the transmission of a call, except for distress and safety calls,
when the channel is occupied by calls.
_________
*
Sensing may be achieved by an associated DSC watchkeeping receiver.

© IEC 2018
4.2 Class of emission and modulation characteristics
4.2.1 (A.803(19)/3.4) Class of emission shall comply with appendix 19 of the Radio
Regulations (ITU-R.M 829-2:1995)
4.2.2 (489-2/1.1.1 and .3) The class of emission shall be G3E (frequency modulation with a
pre-emphasis characteristic of 6 dB/octave) for voice communication. It shall be phase
modulation G2B for DSC signalling.
4.2.3 (489-2/1.1.2) The necessary bandwidth shall be 16 kHz.
4.3 Transmitter
4.3.1 (489-2/1.2.1) The frequency tolerance for ship station transmitters shall not exceed
10 parts in 10 . For practical reasons, the frequency error shall be within ±1,5 kHz.
4.3.2 (A.803(19)/7.1) The transmitter output power shall be between 6 and 25 W.
4.3.3 (A.803(19)/7.2) Provision shall be made for reducing the transmitter output power to a
value of between 0,1 W and 1 W. However, this reduction of the power is optional on channel
70, except for a routine all-ships call where the output power shall not exceed 1 W.
4.3.4 The frequency deviation corresponding to 100 % modulation shall approach ±5 kHz as
nearly as practicable.
4.3.5 (489-2/1.2.5) The upper limit of the audiofrequency band shall not exceed 3 kHz.
4.3.6 (A.803(19)/6) The transmitter, when operating, shall not be damaged by the effects of
open-circuited or short-circuited antenna terminals.
4.3.7 (A.803(19)/10.4) In the transmit condition during duplex operation, only the telephone
handset shall be in circuit. Care shall be taken to prevent harmful electrical or acoustic
feedback, which could cause singing.
4.3.8 (489-2/1.2.2) Spurious emissions on discrete frequencies, when measured in a non-
reactive load equal to the nominal output impedance of the transmitter, shall be in accordance
with the provisions of Appendix S3 of the Radio Regulations. The power of any conducted
spurious emission on any discrete frequency shall not exceed 0,25 µW.
4.3.9 (489-2/1.2.6) The cabinet radiated power shall not exceed 25 µW. In some radio
environments, lower values may be required. The equipment shall meet the requirements of
IEC 60945 for radiated interference.
4.4 Receiver
4.4.1 (A.803(19)/8.1) The maximum usable sensitivity of the receiver shall be equal to or
better than 2 µV e.m.f. for a signal-to-noise and distortion (SINAD) ratio of 20 dB.
4.4.2 (489-2/1.3.2) The adjacent channel selectivity shall be at least 70 dB.
4.4.3 (489-2/1.3.3) The spurious response rejection ratio shall be at least 70 dB.
4.4.4 (489-2/1.3.4) The radiofrequency intermodulation rejection ratio shall be at least 65 dB.

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© IEC 2018
4.4.5 (489-2/1.3.5) The power of any conducted spurious emission, measured at the antenna
terminals, shall not exceed 2,0 nW at any discrete frequency in the frequency range 9 kHz to
2 GHz.
4.4.6 (A.803(19)/8.3) The immunity to interference of the receiver shall be such that the
wanted signal is not seriously affected by unwanted signals.
4.4.7  Scanning characteristics of multiple watch facilities (see also 3.3.10)
4.4.7.1 (A.524(13)/3.1) When the scanning facility is switched on, the priority channel shall
be sampled with a sampling frequency of not less than once per 2 s. If a signal is detected on
the priority channel the receiver shall remain on this channel for the duration of that signal.
4.4.7.2 (A.524(13)/3.2) If a signal is detected on the additional channel the sampling of the
priority channel shall continue, thus interrupting the reception on the additional channel for
periods as short as possible and not greater than 150 ms.
The design of the receiver shall provide for its proper functioning during the period the priority
channel is sampled since the receiving conditions on the priority channel may differ from those
on the additional channel.
4.4.7.3 (A.524(13)/3.3) In the absence of a signal on the priority channel and during
reception of a signal on the additional channel, the duration of each listening period on this
channel shall be at least 850 ms.
4.4.7.4 (A.524(13)/3.4) Means shall be provided to indicate the channel on which a signal is
being received.
4.5 DSC facility
4.5.1 (A.803(19)/11.1) The facility shall conform to the provisions of the relevant ITU-R
*
Recommendations pertaining to the DSC system.
4.5.2 (A.803(19)/11.2) The DSC facility shall comprise:
.1 means to decode and encode DSC messages;
.2 means necessary for composing the DSC message;
.3 means to verify the prepared message before it is transmitted;
.4 means to display the information contained in a received call in plain language;
.5 means for the manual entry of the position information; additionally, automatic entry may
be provided; and
.6 means for the manual entry of the time at which the position was determined;
additionally, automatic entry may be provided.
_________
*
Class A or B DSC equipment conforming to Recommendation ITU-R M.493 shall be used to meet this
requirement.
© IEC 2018
5 Methods of testing and required test results
Environmental tests shall be carried out before tests to verify whether the equipment under test
(EUT) meets all technical requirements. Where electrical tests are required, these shall be
done with normal test voltage as specified in IEC 60945 unless otherwise stated.
Before tests to verify whether the EUT meets all requirements of this standard, the EUT shall
be subjected to a duration test of four cycles of 30 min periods of transmission in the full power
condition with normal test modulation as specified in 5.2.3 separated by 5 min periods of
reception.
5.1 Test conditions
5.1.1 Normal and extreme test conditions
Tests shall be made under normal test conditions and also, where stated, under extreme test
conditions as specified in IEC 60945, of dry heat and the upper limit of supply voltage applied
simultaneously and low temperature and the lower limit of supply voltage applied
simultaneously.
5.1.2 Test power source
During each test the EUT shall be supplied from a test power source, capable of producing
normal and extreme test voltages. For the purpose of tests, the voltage of the power source
shall be measured at the input terminals of the EUT. During tests, the power supply voltages
shall be maintained within ±3 % relative to the voltage level at the beginning of each test.
5.1.3 Procedure for tests at extreme temperatures
For tests at high temperature, the EUT shall be placed in a test chamber and left until thermal
equilibrium is reached. The EUT shall then be switched on for 30 min in the high power
transmit condition, after which the EUT shall meet the requirements of this standard.
For tests at low temperature, the EUT shall be placed in a test chamber and left until thermal
equilibrium is reached. The EUT shall then be switched to stand-by or receive condition for
1 min, after which the EUT shall meet the requirements of this standard.
5.1.4 Performance check
5.1.4.1 Definition
The performance check means a shortened form of the test required by the relevant standard
under normal test conditions, such as could normally be carried out in no more than 15 min.
5.1.4.2 Method of measurement
After each environmental test a performance check shall be made, which shall include the
following:
a) the transmitter frequency error to 5.4.1.2 and the output power of the transmitter to
5.4.2.2 (high power only); and
b) the receiver maximum usable sensitivity to 5.5.3.2.
5.1.4.3 Results required
The frequency error shall be less than ±1,5 kHz, the carrier power shall be not less than 6 W
and the receiver sensitivity shall be better than 12 dBµV .

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© IEC 2018
5.1.5 Environmental tests
Environmental tests are intended to assess the suitability of the construction of the EUT for its
intended physical conditions of use. After environmental tests, and, if specified also during the
test, the EUT shall comply with the requirements of a performance check.
Environmental tests shall be carried out before any other tests. Where electrical tests are
required, these shall be done with normal test voltage unless otherwise stated.
Environmental tests shall be carried out in the following order.
5.1.5.1 Dry heat cycle
The dry heat cycle test shall be performed as specified in IEC 60945.
5.1.5.2 Damp heat cycle
The damp heat cycle test shall be performed as specified in IEC 60945.
5.1.5.3 Low temperature cycle
The low temperature cycle test shall be performed as specified in IEC 60945.
5.1.5.4 Vibration
The vibration test shall be performed as specified in IEC 60945.
5.1.5.5 Mould growth and corrosion test
The manufacturer shall produce evidence that the components, materials and finishes
employed in the equipment satisfy the mould growth and corrosion tests.
5.1.6 Unspecified test conditions
Any requirement in clauses 3 and 4 for which no test is specified in this clause 5 shall be
checked by inspection of the equipment, the manufacturing drawings or other relevant
documents. The result of the inspection shall be stated in the test report.
5.2 General conditions of measurement
5.2.1 Arrangements for test signals applied to the receiver input
The source of test signals for application to the receiver input shall be connected in such a way
that the impedance presented to the receiver input is 50 Ω, irrespective of whether one or more
signals are applied to the receiver simultaneously. The level of the test signals shall be
expressed in terms of the electromotive force (e.m.f) at the terminals to be connected to the
receiver. The nominal frequency of the receiver is the carrier frequency of the selected
channel.
5.2.2 Receiver squelch facility
Unless otherwise specified, the squelch circuit shall be set inoperative for the duration of the
test.
5.2.3 Normal test modulation
For normal test modulation, the modulating frequency shall be 1 kHz and the frequency
deviation shall be ±3 kHz. The test signal shall be substantially free from amplitude modulation.

© IEC 2018
5.2.4 Artificial antenna
When tests are carried out with an artificial antenna, this shall be a non-reactive, non-radiating
50 Ω load.
5.2.5 Arrangements for test signals applied to the transmitter input
For the purpose of this standard, the transmitter audiofrequency modulation signal shall be
supplied by a generator to an interface connected to the microphone input and this interface
shall be provided by the manufacturer.
5.2.6 Transmitter output power
Unless otherwise specified, the transmitter output power shall be at maximum for these tests.
5.2.7 Test of equipment with duplex filter
If the equipment is provided with a built-in or an external duplex filter, the requireme
...

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