EN 61108-4:2004

SLOVENSKI SIST EN 61108-4:2005

STANDARD
december 2005
Pomorska navigacijska in radiokomunikacijska oprema in sistemi – Globalni
satelitski navigacijski sistemi (GNSS) – 4. del: Ladijska pomorska oprema
sistemov DGPS in DGLONASS za sprejem radijskih svetilnikov – Zahteve za
lastnosti, metode preskušanja in zahtevani preskus (IEC 61108-4:2004)
Maritime navigation and radiocommunication equipment and systems – Global
navigation satellite systems (GNSS) – Part 4: Shipborne DGPS and DGLONASS
maritime radio beacon receiver equipment – Performance requirements, methods
of testing and required test (IEC 61108-4:2004)
ICS 47.020.70 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 61108-4
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2004

ICS 47.020.70
English version
Maritime navigation and radiocommunication equipment and systems –-
Global navigation satellite systems (GNSS)
Part 4: Shipborne DGPS and DGLONASS maritime
radio beacon receiver equipment –
Performance requirements, methods of testing and required test results
(IEC 61108-4:2004)
Matériels et systèmes de navigation  Navigations- und Funkkommunikations-
et de radiocommunication maritimes – geräte und -systeme für die Seeschifffahrt –
Système mondial de navigation Weltweite Navigations-Satellitensysteme
par satellite (GNSS) (GNSS)
Partie 4: Equipement pour récepteur de Teil 4: DGPS- und DGLONASS-
balises radioélectriques DGLONASS et Seefunkbaken-Empfangsanlagen –
DGPS embarqués – Leistungsanforderungen, Prüfverfahren
Exigences d'exploitation et de und geforderte Prüfergebnisse
fonctionnement, méthodes d'essai et (IEC 61108-4:2004)
résultats d'essai exigés
(CEI 61108-4:2004)
This European Standard was approved by CENELEC on 2004-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61108-4:2004 E
Foreword
The text of document 80/394/FDIS, future edition 1 of 61108-4, prepared by IEC TC 80, Maritime
navigation and radiocommunication equipment and systems, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 61108-4 on 2004-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61108-4:2004 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61108-4:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60945 - Maritime navigation and EN 60945 2002
radiocommunication equipment and
systems - General requirements -
Methods of testing and required test
results
1) 2)
IEC 61162-1 - Maritime navigation and EN 61162-1 2000
radiocommunication equipment and
systems - Digital interfaces
Part 1: Single talker and multiple listeners

1) 2)
IEC 61162-2 - Part 2: Single talker and multiple EN 61162-2 1998
listeners, high-speed transmission

1)
IMO Resolution - Performance standards for shipborne - -
MSC.114(73) DGPS and DGLONASS maritime radio
beacon receiver equipment
1)
IMO Resolution - General requirements for shipborne radio - -
A.694(17) equipment forming part of the global
maritime distress and safety system
(GMDSS) and for electronic navigational
aids
1)
ITU-R M.823-2 - Technical characteristics of differential - -
transmissions for global navigation
satellite systems (GNSS) from maritime
radio beacons in the frequency band
285 kHz-325 kHz (283,5 kHz-315 kHz in
Region 1)
1)
Undated reference.
2)
Valid edition at date of issue.

INTERNATIONAL IEC
STANDARD 61108-4
First edition
2004-07
Maritime navigation and radiocommunication
equipment and systems –
Global navigation satellite systems (GNSS) –
Part 4:
Shipborne DGPS and DGLONASS maritime
radio beacon receiver equipment –
Performance requirements, methods of
testing and required test results
© IEC 2004 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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– 2 – 61108-4 © IEC:2004(E)
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms, definitions and abbreviations .7
3.1 Definitions .7
3.2 Abbreviations .7
4 Performance requirements .7
4.1 Introduction .7
4.2 Composition .8
4.3 Functional requirements .8
4.4 Protection.9
4.5 Integrity.9
4.6 Interfaces .10
4.7 IEC 61162-1, IEC 61162-2 implementation .10
4.8 IEC 61162-3 implementation .10
4.9 Display and control.10
4.10 Installation .10
5 Technical characteristics .11
5.1 Carrier frequency .11
5.2 Frequency tolerance.11
5.3 Message types .11
5.4 Data transmission rate .11
5.5 Dynamic range .11
5.6 Maximum bit error ratio .11
5.7 Receiver selectivity and stability.11
5.8 Automatic frequency selection.12
5.9 Protection ratios .12
6 Methods of testing and required test results .13
6.1 General conditions of measurement and test signals .13
6.2 Operational tests .14
6.3 Protection of external connections.18
6.4 Integrity.18
6.5 Technical tests .18
6.6 Additional functionality tests .20
Annex A (normative) Simulation of noise situations for the test of shipborne DGPS
maritime radio beacon receiver equipment.21
A.1 Parameters describing noise .21
A.2 Noise models .22
A.3 Test procedures .26
Annex B (informative)  Methodology for measuring WER .27
B.1 Recording the RTCM data stream.27
B.2 Analysing the RTCM data stream .27
B.3 Caution .27

61108-4 © IEC:2004(E) – 3 –
Annex C (normative) Tests that are specific to integrated equipment that does not
provide an output port for testing.30
C.1 General requirements .30
C.2 Test of WER display .30
C.3 Comments to Clause 6, methods of testing.30
Annex D (informative) Installation guidelines to counteract the effect of interference .31
D.1 Introduction .31
D.2 Antennas .31
D.3 General installation requirements .32
D.4 Noise/interference sources .34
D.5 Testing .34
D.6 Troubleshooting.35
Annex E (informative) Implementation using a concurrent process.36
Annex F (informative) Data interface guidance.38
Bibliography.39
Figure A.1 – Generating atmospherics according to Feldman.24
Figure A.2 – Test set-up using a PC to program a waveform synthesizer .26
Figure B.1 – Word error rate algorithm (first part) .28
Figure B.2 – Word error rate algorithm (second part) .29
Figure E.1 – Station status update .36
Figure E.2 – Navigation process .
...