ITU-T F.10(11-1988) (英) Character error rate objective for ……

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1、INTERNATIONALTELECOMMUNICATIONUNION)45 4&TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU/0%2!4)/.3!.$15!,)49/&3%26)#%4%,%'2!0(3%26)#%3#(!2!#4%2%22/22!4%/"*%#4)6%&/24%,%'2!0(#/--5.)#!4)/.53).' 5.)434!24 34/0%15)0-%.4)45 4Recommendation&(Extractf

2、romthe"LUE"OOK)NOTES1ITU-TRecommendationF.10waspublishedinFascicleII.4oftheBlueBook.ThisfileisanextractfromtheBlueBook.WhilethepresentationandlayoutofthetextmightbeslightlydifferentfromtheBlueBookversion,thecontentsofthefileareidenticaltotheBlueBookversionandcopyrightconditions

3、remainunchanged(seebelow).2InthisRecommendation,theexpression“Administration”isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.ãITU1988,1993Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,elect

4、ronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromtheITU.RecommendationF.10FascicleII.4-Rec.F.10CHARACTERERRORRATEOBJECTIVEFORTELEGRAPHCOMMUNICATIONUSING5-UNITSTART-STOPEQUIPMENTTheCCITT,considering(a)thatitwouldbeusefultohaveacommonstandardforass

5、essingthequalityoftelegraphcommunications,(b)thatthecharactererrorrate[1]ofatelegraphcommunicationwouldbesuitableforthispurpose;(c)thatadefinederrorrateobjectiveshouldbeestablished;(d)thatallformsofcurrentwidebandtransmissiontechniqueshaveintrinsiccharacteristicsthatmakesomeerro

6、rseconomicallyunavoidable;(e)thatoccasionalburstsoferrorsoccur(errorsthatareconcentratedintoarelativelyshorttimeinterval,i.e.seconds),unanimouslydeclares(1)thatthequalityofservicemustbethesamefortelegraphcommunicationinthepublictelegramservice,thetelexserviceandtheleasedcircuits

7、ervice;(2)thattheobjective,irrespectiveoftransmissionmediaandinterveningequipment,shouldbeanerrorratenotgreaterthan3in100000alphabetictelegraphsignalstransmitted;(3)thattheerrorrateobjectiveshouldhavenotlessthana95%probability;(4)that,inthedeterminationoferrorrate,measurementssh

8、ouldbemadeforrelativelylongtimeperiods,i.e.fora