音频信号发生器毕业设计论文翻译英文

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1、本科毕业设计（论文）外文翻译原文学生姓名：院（系）：电子工程学院专业班级：指导教师：完成日期：2010年4月20日4ExpandingtheFeaturesofaVIYoucanchooseoneofmanyLabVIEWVItemplatestouseasastartingpoint.However,sometimesyouneedtobuildaVIforwhichatemplateisnotavailable.ThischapterteachesyouhowtobuildandcustomizeaVIwithoutus

2、ingatemplate.BuildingaVIfromaBlankTemplateInthefollowingexercises,youwillopenablankVIandaddExpressVIsandstructurestotheblockdiagramtobuildanewVI.YouwillbuildaVIthatgeneratesasignal,reducesthenumberofsamplesinthesignal,anddisplaystheresultingdatainatableonthefrontpa

3、nel.Whenyoucompletetheexercises,thefrontpaneloftheVIwilllooksimilartothefrontpanelinFigure3-1.Youcancompletetheexercisesinapproximately30minutes.Figure3-1.FrontPanelfortheReduceSamplesVIOpeningaBlankVIIfnotemplateisavailableforthetaskyouwanttocreate,youcanstartwith

4、ablankVIandaddExpressVIstoaccomplishthespecifictask.CompletethefollowingstepstoopenablankVI.1.IntheLabVIEWdialogbox,clickthearrowontheNewbuttonandselectBlankVIfromtheshortcutmenuorpressthekeystoopenablankVI.Noticethatablankfrontpanelandblockdiagramappear.4N

5、oteYoualsocanopenablankVIbyselectingBlankVIfromtheCreatenewlistinTheNewdialogboxorbyselectingFile»NewVIfromthefrontpanelorblockdiagrammenubar.2.IftheFunctionspaletteisnotvisible,right-clickanyblankspaceontheblockdiagramtobringupthetemporaryversionoftheFunctionspale

6、tte.Clickthethumbtack,shownatleft,intheupperleftcorneroftheFunctionspalettetoplacethepaletteonthescreen.NoteYoucanright-clickonablankspaceontheblockdiagramorthefrontpaneltobringuptheFunctionsorControlspalettes.AddinganExpressVIthatSimulatesaSignalCompletethefollowi

7、ngstepstofindtheExpressVIyouwanttouseandthenaddittotheblockdiagram.1.IftheContextHelpwindowisnotvisible,pressthekeystoopentheContextHelpwindow.YoualsocanpresstheShowContextHelpWindowbutton,shownatleft,toopentheContextHelpwindow.2.SelecttheInputpaletteontheF

8、unctionspaletteandmovethecursorovertheExpressVIsontheInputpalette.NoticethattheContextHelpwindowdisplaysinformationaboutthefunctionofeachExpressV