1、NORMEINTERNATIONALEINTERNATIONALSTANDARDCEIIEC60268-11985AMENDEMENT 1AMENDMENT 11988-01Amendement 1Equipements pour systmes lectroacoustiquesPremire partie:GnralitsAmendment 1Sound system equipmentPart 1:General IEC 1988 Droits de reproduction rservs Copyright-all rights reservedInternational Electr
2、otechnical Commission?3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300?e-mail:inmailiec.ch?IEC web site http:/www.iec.chPECCommission Electrotechnique InternationaleInternational Electrotechnical CommissionMemayHapoAHaa 3neKrporexHHVecKaa HOMHCCH?CODE PRIXPRICE CODEPour prix,voir catalogue
3、en vigueurFor price,see current catalogueLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.84(BC)5084(BC)45Procdure des Deux MoisRapport de vote268-1 mod.1?-2-?Copyright CEIPREFACELa prsente modification a t tablie par le Comit dEtudes n
4、 84 de laCEI:Equipements et systmes dans le domaine des techniques audio,vido etaudiovisuelles.Le texte de cette modification est issu des documents suivants:Le rapport de vote indiqu dans le tableau ci-dessus donne toute infor-mation sur le vote ayant abouti lapprobation de cette modification.Page
5、30Remplacer le tableau All par le suivant:TABLEAU AllDure des salves(ms)11)21)5102050100200Indications par rapport la lecture en rgimepermanent(%)17,026,6404852596880(dB)-15,4-11,5-8,0-6,4-5,7-4,6-3,3-1,9Valeurs limites-limite infrieure?(%)13,522,4344144505868(dB)-17,4-13,0-9,3-7,7-7,1-6,0-4,7-3,3-l
6、imite suprieure?(%)21,431,6465560687892(dB)-13,4-10,0-6,6-5,2-4,4-3,3-2,2-0,71)Lutilisation de salves dune dure infrieure 5 ms nest pas obligatoire.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.268-1 Amend.1?-3-?Copyright IECPREFACET
7、his amendment has been prepared by IEC Technical Committee No.84:Equipment and systems in the field of audio,video and audiovisualengineering.The text of this amendment is based on the following documents:Two Months ProcedureReport on Voting84(C0)4584(C0)50Full information on the voting for the appr
8、oval of this amendment can befound in the Voting Report indicated in the above table.Page 31Replace Table All by the following:TABLE AllBurst duration(ms)11)21)5102050100200Amplitude referencesteady signal?reading(%)17.026.6404852596880(dB)-15.4-11.5-8.0-6.4-5.7-4.6-3.3-1.9Limited values-lower limit
9、?(%)13.522.4344144505868(dB)-17.4-13.0-9.3-7.7-7.1-6.0-4.7-3.3-upper limit?(%)21.431.6465560687892(dB)-13.4-10.0-6.6-5.2-4.4-3.3-2.2-0.71)The use of burst durations less than 5 ms is not mandatory.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.ICS 33.160.01Typeset and printed by the IEC Central OfficeGENEVA,SWITZERLANDLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.
