IEC_62238-2003.pdf

INTERNATIONALSTANDARDIEC62238First edition2003-03Maritime navigation and radiocommunicationequipment and systems VHF radiotelephone equipment incorporatingClass D Digital Selective Calling(DSC)Methods of testing and required test resultsReference numberIEC 62238:2003(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(http:/www.iec.ch/searchpub/cur_fut.htm)enables you to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just Published This summary of recently issued publications(http:/www.iec.ch/online_news/justpub/jp_entry.htm)is also available by email.Please contact the CustomerService Centre(see below)for further information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC62238First edition2003-03Maritime navigation and radiocommunicationequipment and systems VHF radiotelephone equipment incorporatingClass D Digital Selective Calling(DSC)Methods of testing and required test results IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chXBFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62238 IEC:2003(E)CONTENTSFOREWORD.5INTRODUCTION.61Scope.72Normative references.73Terms,definitions and abbreviations.83.1Definitions.83.2Abbreviations.94General and operational requirements.94.1General.94.2Composition.94.3Construction.94.4Controls and indicators.104.5Facilities for coding and decoding of DSC.114.6DSC display.124.7Handset and loudspeaker.134.8Safety precautions.134.9Labelling.134.10 Warm up.145Technical requirements.145.1Switching time.145.2Class of emission and modulation characteristics.145.3Facilities for DSC transmission and reception.145.4Ships identity MMSI and Group MMSI.155.5Entry of position information.155.6Alarm circuits for incoming calls.155.7Multiple watch facilities.165.8Built-in test.176General conditions of measurement.176.1Arrangements for test signals applied to the receiver input.176.2Squelch.176.3Normal test modulation.176.4Artificial antenna.186.5Arrangements for test signals applied to the transmitter input.186.6Test channels.186.7Generation and examination of the digital selective call signal.186.8Standard test signals for DSC.186.9Determination of the symbol error ratio in the output of the receiving part.186.10 Measurement uncertainty and interpretation of the measured results.196.11 Test conditions,power sources,and ambient temperatures.196.12 Normal test conditions.206.13 Extreme test conditions.206.14 Procedure for tests at extreme temperatures.21LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62238 IEC:2003(E)3 7Environmental tests.217.1Introduction.217.2Procedure.217.3Performance check.217.4Vibration test.217.5Temperature tests.218Transmitter.228.1Frequency error.228.2Carrier power.228.3Frequency deviation.238.4Sensitivity of the modulator,in