ITU-T F.112(11-1988) (英) Quality objectives for 50-baud start-stop……

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1、INTERNATIONALTELECOMMUNICATIONUNION)45 4&TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU/0%2!4)/.3!.$15!,)49/&3%26)#%-/"),%3%26)#%15!,)49/"*%#4)6%3&/2 "!5$34!24 34/04%,%'2!0(42!.3-)33)/.).4(%-!2)4)-%-/"),% 3!4%,,)4%3%26)#%)45 4Recommendation&

2、(Extractfromthe"LUE"OOK)NOTES1ITU-TRecommendationF.112waspublishedinFascicleII.4oftheBlueBook.ThisfileisanextractfromtheBlueBook.WhilethepresentationandlayoutofthetextmightbeslightlydifferentfromtheBlueBookversion,thecontentsofthefileareidenticaltotheBlueBookversionandco

3、pyrightconditionsremainunchanged(seebelow).2InthisRecommendation,theexpression“Administration”isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.ãITU1988,1993Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyfo

4、rmorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromtheITU.RecommendationF.112FascicleII.4-Rec.F.112QUALITYOBJECTIVESFOR50-BAUDSTART-STOPTELEGRAPHTRANSMISSIONINTHEMARITIMEMOBILE-SATELLITESERVICETheCCITT,considering(a)thatprope

5、rinterworkingofthistelegraphtransmissionwiththeinternationaltelegraphservicesmustbeensured;(b)CCITTRecommendationF.10concerningcharactererrorratefortelegraphcommunications,unanimouslyrecommendsthat,forthecoast-earthstation-to-mobileterminalandmobileterminal-to-coast-earthstat

6、ionlinks,sufficientmarginshouldbeincludedtoovercomeadversepropagationconditions.Theobjectiveshouldbethatpropagationconditionsshouldnotcontributeanycharactererrorsforatleast95%ofallcallswithmobileterminalswithinthesatelliteservicearea.Withtheexceptionofblockageeffects,propagat

7、ionconditionsshouldnotcontributemorethan8errorsin100000characterswitha99%confidencelevelformobileterminalsattheedgeoftheservicearea.Note-ThisRecommendationcorrespondstoCCIRRecommendation552.FascicleII.4-Rec.F.1121