音频信号发生器毕业设计论文翻译英文

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A1EXPANDINGTHEFEATURESOFAVIYOUCANCHOOSEONEOFMANYLABVIEWVITEMPLATESTOUSEASASTARTINGPOINTHOWEVER,SOMETIMESYOUNEEDTOBUILDAVIFORWHICHATEMPLATEISNOTAVAILABLETHISCHAPTERTEACHESYOUHOWTOBUILDANDCUSTOMIZEAVIWITHOUTUSINGATEMPLATEBUILDINGAVIFROMABLANKTEMPLATEINTHEFOLLOWINGEXERCISES,YOUWILLOPENABLANKVIANDADDEXPRESSVISANDSTRUCTURESTOTHEBLOCKDIAGRAMTOBUILDANEWVIYOUWILLBUILDAVITHATGENERATESASIGNAL,REDUCESTHENUMBEROFSAMPLESINTHESIGNAL,ANDDISPLAYSTHERESULTINGDATAINATABLEONTHEFRONTPANELWHENYOUCOMPLETETHEEXERCISES,THEFRONTPANELOFTHEVIWILLLOOKSIMILARTOTHEFRONTPANELINFIGURE31YOUCANCOMPLETETHEEXERCISESINAPPROXIMATELY30MINUTESFIGURE31FRONTPANELFORTHEREDUCESAMPLESVIOPENINGABLANKVIIFNOTEMPLATEISAVAILABLEFORTHETASKYOUWANTTOCREATE,YOUCANSTARTWITHABLANKVIANDADDEXPRESSVISTOACCOMPLISHTHESPECIFICTASKCOMPLETETHEFOLLOWINGSTEPSTOOPENABLANKVI1INTHELABVIEWDIALOGBOX,CLICKTHEARROWONTHENEWBUTTONANDSELECTBLANKVIFROMTHESHORTCUTMENUORPRESSTHEKEYSTOOPENABLANKVINOTICETHATABLANKFRONTPANELANDBLOCKDIAGRAMAPPEARA0NOTEYOUALSOCANOPENABLANKVIBYSELECTINGBLANKVIFROMTHECREATENEWLISTINTHENEWDIALOGBOXORBYSELECTINGFILENEWVIFROMTHEFRONTPANELORBLOCKDIAGRAMMENUBAR2IFTHEFUNCTIONSPALETTEISNOTVISIBLE,RIGHTCLICKANYBLANKSPACEONTHEBLOCKDIAGRAMTOBRINGUPTHETEMPORARYVERSIONOFTHEFUNCTIONSPALETTECLICKTHETHUMBTACK,SHOWNATLEFT,INTHEUPPERLEFTCORNEROFTHEFUNCTIONSPALETTETOPLACETHEPALETTEONTHESCREENNOTEYOUCANRIGHTCLICKONABLANKSPACEONTHEBLOCKDIAGRAMORTHEFRONTPANELTOBRINGUPTHEFUNCTIONSORCONTROLSPALETTESADDINGANEXPRESSVITHATSIMULATESASIGNALCOMPLETETHEFOLLOWINGSTEPSTOFINDTHEEXPRESSVIYOUWANTTOUSEANDTHENADDITTOTHEBLOCKDIAGRAM1IFTHECONTEXTHELPWINDOWISNOTVISIBLE,PRESSTHEKEYSTOOPENTHECONTEXTHELPWINDOWYOUALSOCANPRESSTHESHOWCONTEXTHELPWINDOWBUTTON,SHOWNATLEFT,TOOPENTHECONTEXTHELPWINDOW2SELECTTHEINPUTPALETTEONTHEFUNCTIONSPALETTEANDMOVETHECURSOROVERTHEEXPRESSVISONTHEINPUTPALETTENOTICETHATTHECONTEXTHELPWINDOWDISPLAYSINFORMATIONABOUTTHEFUNCTIONOFEACHEXPRESSVI3FROMTHEINFORMATIONPROVIDEDINTHECONTEXTHELPWINDOW,FINDTHEEXPRESSVITHATCANOUTPUTASINEWAVESIGNAL4SELECTTHEEXPRESSVIANDPLACEITONTHEBLOCKDIAGRAMTHECONFIGURESIMULATESIGNALDIALOGBOXAPPEARS5IDLETHECURSOROVERTHEVARIOUSOPTIONSINTHECONFIGURESIMULATESIGNALDIALOGBOX,SUCHASFREQUENCYHZ,AMPLITUDE,ANDSAMPLESPERSECONDHZREADTHEINFORMATIONTHATAPPEARSINTHECONTEXTHELPWINDOW6CONFIGURETHESIMULATESIGNALEXPRESSVITOGENERATEASINEWAVEWITHAFREQUENCYOF107ANDAMPLITUDEOF27NOTICEHOWTHESIGNALDISPLAYEDINTHERESULTPREVIEWWINDOWCHANGESTOREFLECTTHECONFIGUREDSINEWAVE8CLOSETHECONFIGURESIMULATESIGNALDIALOGBOX9MOVETHECURSOROVERTHESIMULATESIGNALEXPRESSVIANDREADTHEINFORMATIONTHATA2APPEARSINTHECONTEXTHELPWINDOWNOTICETHATTHECONTEXTHELPWINDOWNOWDISPLAYSTHECONFIGURATIONOFTHESIMULATESIGNALEXPRESSVI10SAVETHISVIASREDUCESAMPLESVITOANEASILYACCESSIBLELOCATIONMODIFYINGTHESIGNALCOMPLETETHEFOLLOWINGSTEPSTOUSETHELABVIEWHELPTOSEARCHFORTHEEXPRESSVITHATREDUCESTHENUMBEROFSAMPLESINASIGNAL1SELECTHELPVI,FUNCTION,HOWTOHELPTOOPENTHELABVIEWHELP2CLICKTHESEARCHTABANDTYPESAMPLECOMPRESSIONINTHETYPEINTHEWORDSTOSEARCHFORTEXTBOXNOTICETHATTHISWORDCHOICEREFLECTSWHATYOUWANTTHISEXPRESSVITODOCOMPRESS,ORREDUCE,THENUMBEROFSAMPLESINASIGNAL3SELECTTHESAMPLECOMPRESSIONEXPRESSVITOPICTODISPLAYTHETOPICTHATDESCRIBESTHESAMPLECOMPRESSIONEXPRESSVI4AFTERYOUREADTHEDESCRIPTIONOFTHEEXPRESSVI,CLICKTHEPLACEONTHEBLOCKDIAGRAMBUTTON,SHOWNATLEFT,TOSELECTTHEEXPRESSVI5MOVETHECURSORTOTHEBLOCKDIAGRAMNOTICEHOWLABVIEWATTACHESTHESAMPLECOMPRESSIONEXPRESSVITOTHECURSOR6PLACETHESAMPLECOMPRESSIONEXPRESSVIONTHEBLOCKDIAGRAMTOTHERIGHTOFTHESIMULATESIGNALEXPRESSVI7CONFIGURETHESAMPLECOMPRESSIONEXPRESSVITOREDUCETHESIGNALBYAFACTOROF25USINGTHEMEANOFTHESEVALUES8CLOSETHECONFIGURESAMPLECOMPRESSIONDIALOGBOX9USINGTHEWIRINGTOOL,WIRETHESINEOUTPUTINTHESIMULATESIGNALEXPRESSVITOTHESIGNALSINPUTINTHESAMPLECOMPRESSIONEXPRESSVICUSTOMIZINGTHEFRONTPANELINTHEPREVIOUSEXERCISES,YOUADDEDCONTROLSANDINDICATORSTOTHEFRONTPANELUSINGTHECONTROLSPALETTEYOUALSOCANADDCONTROLSANDINDICATORSFROMTHEBLOCKDIAGRAMCOMPLETETHEFOLLOWINGSTEPSTOCREATECONTROLSANDINDICATORSA31RIGHTCLICKTHEMEANOUTPUTINTHESAMPLECOMPRESSIONEXPRESSVIANDSELECTCREATENUMERICINDICATORTOCREATEANUMERICINDICATOR2RIGHTCLICKTHEMEANOUTPUTOFTHESAMPLECOMPRESSIONEXPRESSVIANDSELECTINSERTINPUT/OUTPUTFROMTHESHORTCUTMENUTOINSERTTHEENABLEINPUT3RIGHTCLICKTHEENABLEINPUTANDSELECTCREATECONTROLTOCREATETHEENABLESWITCH4RIGHTCLICKTHEWIRELINKINGTHESINEOUTPUTINTHESIMULATESIGNALEXPRESSVITOTHESIGNALSINPUTINTHESIGNALCOMPRESSIONEXPRESSVIANDSELECTCREATEGRAPHINDICATORNOTICETHATYOUCANCREATECONTROLSANDINDICATORSFROMTHEBLOCKDIAGRAMWHENYOUREATECONTROLSANDINDICATORSUSINGTHISMETHOD,LABVIEWAUTOMATICALLYCREATESTERMINALSTHATARELABELEDANDFORMATTEDCORRECTLY5USINGTHEWIRINGTOOL,WIRETHEMEANOUTPUTINTHESAMPLECOMPRESSIONEXPRESSVITOTHESINETERMINALNOTICETHATTHEMERGESIGNALSFUNCTIONAPPEARS6ARRANGETHEOBJECTSONTHEBLOCKDIAGRAMSOTHATTHEYAPPEARSIMILARTOFIGURE32TIPYOUCANRIGHTCLICKANYWIREANDSELECTCLEANUPWIREFROMTHESHORTCUTMENUTOHAVELABVIEWAUTOMATICALLYARRANGETHEWIRESFORYOUFIGURE32BLOCKDIAGRAMFORTHEREDUCESAMPLESVI7DISPLAYTHEFRONTPANELNOTICETHATTHECONTROLSANDINDICATORSYOUADDEDAUTOMATICALLYAPPEARONTHEFRONTPANELWITHLABELSTHATCORRESPONDTOTHEIRFUNCTION8SAVETHISVIA4CONFIGURINGTHEVITORUNCONTINUOUSLYUNTILTHEUSERSTOPSITINTHECURRENTSTATE,THEVIRUNSONCE,GENERATESONESIGNAL,THENSTOPSEXECUTINGTORUNTHEVIUNTILACONDITIONISMET,YOUCANADDAWHILELOOPTOTHEBLOCKDIAGRAMCOMPLETETHEFOLLOWINGSTEPSTOADDAWHILELOOP1DISPLAYTHEFRONTPANELANDRUNTHEVINOTICEHOWTHEVIRUNSONCEANDTHENSTOPSALSONOTICEHOWTHEREISNOSTOPBUTTON2DISPLAYTHEBLOCKDIAGRAMANDSELECTTHEWHILELOOPONTHEEXECUTIONCONTROLPALETTE3MOVETHECURSORTOTHEUPPERLEFTCORNEROFTHEBLOCKDIAGRAMPLACETHETOPLEFTCORNEROFTHEWHILELOOPHERE4CLICKANDDRAGTHECURSORDIAGONALLYTOENCLOSEALLTHEEXPRESSVISANDWIRES,ASSHOWNINFIGURE33FIGURE33PLACINGTHEWHILELOOPAROUNDTHEEXPRESSVISNOTICETHATTHEWHILELOOP,SHOWNATLEFT,APPEARSWITHASTOPBUTTONWIREDTOTHECONDITIONTERMINALTHISWHILELOOPISCONFIGUREDTOSTOPWHENTHEUSERCLICKSTHESTOPBUTTON5DISPLAYTHEFRONTPANELANDRUNTHEVINOTICETHATTHEVINOWRUNSUNTILYOUCLICKTHESTOPBUTTONAWHILELOOPEXECUTESTHEFUNCTIONSINSIDETHELOOPUNTILTHEUSERPRESSESTHESTOPBUTTONCONTROLLINGTHESPEEDOFEXECUTIONTOPLOTTHEPOINTSONTHEWAVEFORMGRAPHMORESLOWLY,YOUCANADDATIMEDELAYTOTHEBLOCKDIAGRAMCOMPLETETHEFOLLOWINGSTEPSTOCONTROLTHESPEEDATWHICHTHEVIEXECUTES1ONTHEBLOCKDIAGRAM,SELECTTHETIMEDELAYEXPRESSVIONTHEEXECUTIONCONTROLA5PALETTEANDPLACEITINSIDETHELOOP2TYPE250INTHETIMEDELAYSECONDSTEXTBOXTHISTIMEDELAYSPECIFIESHOWFASTTHELOOPRUNSWITHA250SECONDTIMEDELAY,THELOOPITERATESONCEEVERYQUARTEROFASECOND3CLOSETHECONFIGURETIMEDELAYDIALOGBOX4SAVETHISVI5DISPLAYTHEFRONTPANELANDRUNTHEVI6CLICKTHEENABLESWITCHANDNOTICETHECHANGEONTHEGRAPHNOTICEHOWIFTHEENABLESWITCHISON,THEGRAPHDISPLAYSTHEREDUCEDSIGNALIFTHEENABLESWITCHISOFF,THEGRAPHDOESNOTDISPLAYTHEREDUCEDSIGNAL7CLICKTHESTOPBUTTONTOSTOPTHEVIUSINGATABLETODISPLAYDATACOMPLETETHEFOLLOWINGSTEPSTODISPLAYACOLLECTIONOFMEANVALUESINATABLEONTHEFRONTPANEL1ONTHEFRONTPANEL,SELECTTHEEXPRESSTABLEINDICATORONTHETEXTINDICATORSPALETTEANDPLACEITONTHEFRONTPANELTOTHERIGHTOFTHEWAVEFORMGRAPH2DISPLAYTHEBLOCKDIAGRAMNOTICETHATTHETABLETERMINALAPPEARSWIREDTOTHEBUILDTABLEEXPRESSVIAUTOMATICALLY3IFTHEBUILDTABLEEXPRESSVIANDTHETABLETERMINALARENOTSELECTEDALREADY,CLICKANOPENAREAONTHEBLOCKDIAGRAMTOTHELEFTOFTHEBUILDTABLEEXPRESSVIANDTHETABLETERMINALDRAGTHECURSORDIAGONALLYUNTILTHESELECTIONRECTANGLEENCLOSESTHEBUILDTABLEEXPRESSVIANDTHETABLETERMINAL,SHOWNATLEFTAMOVINGDASHEDOUTLINECALLEDAMARQUEEHIGHLIGHTSTHEBUILDTABLEEXPRESSVI,THETABLETERMINAL,ANDTHEWIREJOININGTHETWO4DRAGTHEOBJECTSINTOTHEWHILELOOPTOTHERIGHTOFTHEMEANTERMINALNOTICETHATTHEWHILELOOPAUTOMATICALLYRESIZESTOENCLOSETHEBUILDTABLEEXPRESSVIANDTHETABLETERMIAL5USINGTHEWIRINGTOOL,WIRETHEMEANTERMINALOFTHESAMPLECOMPRESSIONEXPRESSVITOTHESIGNALSINPUTOFTHEBUILDTABLEEXPRESSVITHEBLOCKDIAGRAMSHOULDAPPEARSIMILARTOFIGURE34A6FIGURE34BLOCKDIAGRAMOFTHEREDUCESAMPLESVI6DISPLAYTHEFRONTPANELANDRUNTHEVI7CLICKTHEENABLESWITCHTHETABLEDISPLAYSTHEMEANVALUESOFEVERY25SAMPLESOFTHESINEWAVENOTICEIFTHEENABLESWITCHISOFF,THETABLEDOESNOTRECORDTHEMEANVALUES8STOPTHEVI9EXPERIMENTWITHPROPERTIESOFTHETABLEBYUSINGTHETABLEPROPERTIESDIALOGBOXFOREXAMPLE,TRYCHANGINGTHENUMBEROFCOLUMNSTOONE10SAVEANDCLOSETHISVISUMMARYTHEFOLLOWINGTOPICSAREASUMMARYOFTHEMAINCONCEPTSYOULEARNEDINTHISCHAPTERUSINGTHELABVIEWHELPRESOURCESYOUCANUSETHECONTEXTHELPWINDOWANDTHELABVIEWHELPTOLEARNMOREABOUTEXPRESSVISBOTHPROVIDEINFORMATIONTHATDESCRIBETHEFUNCTIONALITYOFTHEEXPRESSVIANDHOWTOCONFIGURETHEEXPRESSVITHEFOLLOWINGISASUMMARYOFTHEDIFFERENTWAYSYOULEARNEDTOUSETHEHELPRESOURCESINTHISCHAPTERTHECONTEXTHELPWINDOWDISPLAYSBASICINFORMATIONABOUTLABVIEWOBJECTSWHENYOUMOVETHECURSOROVEREACHOBJECTOBJECTSWITHCONTEXTHELPINFORMATIONINCLUDEA7VIS,STRUCTURES,PALETTES,ANDDIALOGBOXCOMPONENTSWHENYOUPLACEANEXPRESSVIONTHEBLOCKDIAGRAM,THECONTEXTHELPWINDOWDISPLAYSABRIEFDESCRIPTIONOFTHEEXPRESSVIANDINFORMATIONABOUTHOWYOUCONFIGUREDTHEEXPRESSVIYOUCANFINDANDSELECTANEXPRESSVIANDOTHERBLOCKDIAGRAMOBJECTSINTHELABVIEWHELPCLICKTHEPLACEONTHEBLOCKDIAGRAMBUTTONTOSELECTABLOCKDIAGRAMOBJECTANDPLACEITONTHEBLOCKDIAGRAMTONAVIGATETHELABVIEWHELP,USETHECONTENTS,INDEX,ANDSEARCHTABSUSETHECONTENTSTABTOGETANOVERVIEWOFTHETOPICSANDSTRUCTUREOFTHEHELPUSETHEINDEXTABTOFINDATOPICBYKEYWORDUSETHESEARCHTABTOSEARCHTHEHELPFORAWORDORPHRASECUSTOMIZINGTHEBLOCKDIAGRAMCODETHEREAREMANYCONTROLS,INDICATORS,EXPRESSVIS,ANDSTRUCTURESTHATYOUCANUSETOCUSTOMIZEAVITOCUSTOMIZEAVI,YOUCANCREATECONTROLSANDINDICATORS,CONTROLWHENAVISTOPSRUNNING,ANDDISPLAYGENERATEDDATAINATABLECREATINGCONTROLSANDINDICATORSCREATECONTROLSANDINDICATORSTHATAREWIREDTOEXPRESSVISFROMTHEBLOCKDIAGRAMBYRIGHTCLICKINGTHEEXPRESSVIINPUT,OUTPUT,ORWIRE,ANDSELECTINGANOPTIONFROMTHECREATESHORTCUTMENUCONTROLLINGWHENAVISTOPSRUNNINGUSETHEWHILELOOPTOCONTINUALLYRUNTHECODEENCLOSEDWITHINTHELOOPTHEWHILELOOPSTOPSRUNNINGWHENASTOPCONDITIONISMETWHENYOUPLACEORMOVEANOBJECTINAWHILELOOPNEARTHEBORDER,THELOOPAUTOMATICALLYRESIZESTOADDSPACEFORTHATOBJECTTHEEXECUTIONCONTROLPALETTEINCLUDESOBJECTSTHATLETYOUCONTROLTHENUMBEROFTIMESAVIRUNS,ASWELLASTHESPEEDATWHICHTHEVIRUNSDISPLAYINGDATAINATABLETHETABLEINDICATORDISPLAYSCOLLECTEDDATAUSETHEBUILDTABLEEXPRESSVITOBUILDATABLEOFCOLLECTEDDATA9ACQUIRINGDATAANDCOMMUNICATIONWITHINSTRUMENTSTHISCHAPTERINTRODUCESYOUTOTHEEXPRESSVISYOUUSEFORDATAACQUISITIONANDINSTRUMENTCOMMUNICATIONONAPCRUNNINGWINDOWSREFERTOTHELABVIEWMEASUREMENTSMANUALFORINFORMATIONABOUTDATAACQUISITIONANDINSTRUMENTCOMMUNICATIONONALLPLATFORMSACQUIRINGASIGNALINTHEFOLLOWINGEXERCISES,YOUWILLUSETHEDAQASSISTANTEXPRESSVITOCREATEANNIDAQMXTASKREFERTOTHETAKINGANNIDAQMXMEASUREMENTINLABVIEWHELPTUTORIALFORINFORMATIONABOUTADDITIONALMETHODSYOUCANUSETOCREATENIDAQMXTASKSTOLAUNCHTHISHELPTUTORIAL,SELECTHELPTAKINGANNIDAQMXMEASUREMENTINLABVIEWNOTETHEFOLLOWINGEXERCISESREQUIRETHATYOUHAVEINSTALLEDNIDAQMXANDANNIDAQMXSUPPORTEDDEVICEREFERTOTHENATIONALINSTRUMENTSWEBSITEATNICOM/DAQFORTHELISTOFNIDAQMXSUPPORTEDDEVICESIFYOUDONOTHAVENIDAQMXINSTALLEDORANNIDAQMXSUPPORTEDDEVICE,REFERTOTHELABVIEWMEASUREMENTSMANUALFORINFORMATIONABOUTUSINGTRADITIONALNIDAQFORDATAACQUISITIONCOMPLETETHEFOLLOWINGEXERCISESTOCREATEANNIDAQMXTASKTHATCONTINUOUSLYTAKESAVOLTAGEREADINGANDPLOTSTHEDATAONAWAVEFORMGRAPHYOUCANCOMPLETETHEEXERCISESINAPPROXIMATELY30MINUTESCREATINGANNIDAQMXTASKINNIDAQMX,ATASKISACOLLECTIONOFONEORMORECHANNELS,TIMING,TRIGGERING,ANDOTHERPROPERTIESTHATAPPLYTOTHETASKITSELFCONCEPTUALLY,ATASKREPRESENTSAMEASUREMENTORGENERATIONYOUWANTTOPERFORMFOREXAMPLE,YOUCANCREATEATASKTOMEASURETEMPERATUREFROMONEORMORECHANNELSONADAQDEVICECOMPLETETHEFOLLOWINGSTEPSTOCREATEANDCONFIGUREATASKTHATREADSAVOLTAGELEVELFROMADAQDEVICE1OPENANEWVI2SELECTTHEDAQASSISTANTEXPRESSVI,SHOWNATLEFT,ONTHEINPUTPALETTEANDPLACEITON10THEBLOCKDIAGRAMTHEDAQASSISTANTLAUNCHESANDACREATENEWDIALOGBOXAPPEARS3CLICKTHEANALOGINPUTBUTTONTODISPLAYTHEANALOGINPUTOPTIONS4SELECTVOLTAGETOCREATEANEWVOLTAGEANALOGINPUTTASKTHEDIALOGBOXDISPLAYSALISTOFCHANNELSONEACHDAQDEVICEINSTALLEDTHENUMBEROFCHANNELSLISTEDDEPENDSONTHENUMBEROFCHANNELSYOUHAVEONTHEDAQDEVICE5INTHEMYPHYSICALCHANNELSLISTBOX,SELECTTHEPHYSICALCHANNELTOWHICHTHESIGNALISCONNECTED,SUCHASAI0,ANDTHENCLICKTHEFINISHBUTTONTHEDAQASSISTANTOPENSANEWWINDOW,SHOWNINFIGURE41,WHICHDISPLAYSOPTIONSFORCONFIGURINGTHECHANNELYOUSELECTEDTOCOMPLETEATASKFIGURE41CONFIGURINGATASKUSINGTHEDAQASSISTANT6INTHEINPUTRANGESECTIONOFTHESETTINGSTAB,ENTER10FORTHEMAXVALUEANDENTER10FORTHEMINVALUE7INTHETASKTIMINGTAB,SELECTTHEACQUIRENSAMPLESOPTION8ENTERAVALUEOF1000INTHESAMPLESTOREADINPUTBOX11TESTINGTHETASKYOUCANTESTTHETASKTOVERIFYTHATYOUCORRECTLYCONFIGUREDTHECHANNELCOMPLETETHEFOLLOWINGSTEPSTOCONFIRMTHATYOUAREACQUIRINGDATA1CLICKTHETESTBUTTON,SHOWNATLEFTANANALOGINPUTTESTPANELDIALOGBOXAPPEARS2CLICKTHESTARTBUTTONONCEORTWICETOCONFIRMTHATYOUAREACQUIRINGDATA,ANDTHENCLICKTHEOKBUTTONTORETURNTOTHEDAQASSISTANT3CLICKTHEOKBUTTONTORETURNTOTHEBLOCKDIAGRAM4SAVETHISVIASREADVOLTAGEVITOANEASILYACCESSIBLELOCATIONGRAPHINGDATAFROMADAQDEVICEUSINGTHETASKYOUCREATEDINTHEPREVIOUSEXERCISE,YOUCANGRAPHTHEDATAACQUIREDFROMADAQDEVICECOMPLETETHEFOLLOWINGSTEPSTOPLOTTHEDATAFROMTHECHANNELINAWAVEFORMGRAPHANDCHANGETHENAMEOFTHESIGNAL1ONTHEBLOCKDIAGRAM,RIGHTCLICKTHEDATAOUTPUTANDSELECTCREATEGRAPHINDICATOR2DISPLAYTHEFRONTPANEL3RUNTHEVITHREEORFOURTIMESANDOBSERVETHEWAVEFORMGRAPHNOTICETHATVOLTAGEAPPEARSINTHEWAVEFORMGRAPHPLOTLEGEND4DISPLAYTHEBLOCKDIAGRAM5RIGHTCLICKTHEDAQASSISTANTEXPRESSVIANDSELECTPROPERTIESTORENAMETHECHANNEL6RIGHTCLICKVOLTAGEINTHECHANNELLISTLISTBOXANDSELECTRENAMETODISPLAYTHERENAMEACHANNELORCHANNELSDIALOGBOXTIPYOUALSOCANSELECTTHENAMEOFTHECHANNELANDPRESSTHEKEYTOACCESSTHERENAMEACHANNELORCHANNELSDIALOGBOX7INTHENEWNAMETEXTBOX,ENTERFIRSTVOLTAGEREADING,ANDCLICKTHEOKBUTTON8CLICKTHEOKBUTTONTOAPPLYTHISCONFIGURATIONANDRETURNTOTHEBLOCKDIAGRAM9DISPLAYTHEFRONTPANELANDRUNTHEVINOTICETHATFIRSTVOLTAGEREADINGAPPEARSINTHEWAVEFORMGRAPHPLOTLEGEND10SAVETHISVI4412EDITINGANNIDAQMXTASKYOUCANADDACHANNELTOTHETASKSOTHATYOUCANCOMPARETWOSEPARATEVOLTAGEREADINGSYOUALSOCANCUSTOMIZETHETASKTOACQUIRETHEVOLTAGEREADINGSCONTINUOUSLYCOMPLETETHEFOLLOWINGSTEPSTOADDANEWCHANNELTOTHETASKANDACQUIREDATACONTINUOUSLY1DISPLAYTHEBLOCKDIAGRAMANDDOUBLECLICKTHEDAQASSISTANTEXPRESSVITOADDANEWCHANNEL2CLICKTHEADDSTEPBUTTON,SHOWNATLEFT,TOOPENTHEADDCHANNELSTOTASKDIALOGBOX3SELECTANYUNUSEDPHYSICALCHANNELINTHEMYPHYSICALCHANNELSLISTBOX4CLICKTHEOKBUTTONTORETURNTOTHEDAQASSISTANT5RENAMETHECHANNELSECONDVOLTAGEREADING6INTHETASKTIMINGTAB,SELECTTHEACQUIRECONTINUOUSLYOPTIONWHENYOUSETTIMINGANDTRIGGERINGOPTIONSINTHEDAQASSISTANT,THESEOPTIONSAPPLYTOALLTHECHANNELSINTHECHANNELLIST7CLICKTHEOKBUTTONTOAPPLYTHISCONFIGURATIONANDRETURNTOTHEBLOCKDIAGRAM8PLACEAWHILELOOPAROUNDTHEDAQASSISTANTEXPRESSVIANDTHEGRAPHINDICATORWIREDTOTHEDATAOUTPUTTHEBLOCKDIAGRAMSHOULDAPPEARSIMILARTOFIGURE42FIGURE42BLOCKDIAGRAMFORTHEREADVOLTAGEVIA8A9VISUALLYCOMPARINGTWOVOLTAGEREADINGSBECAUSEYOUHAVETWOVOLTAGEREADINGSDISPLAYEDONAGRAPH,YOUCANCUSTOMIZETHEPLOTSTODISTINGUISHBETWEENTHETWOCOMPLETETHEFOLLOWINGSTEPSTOCUSTOMIZETHEPLOTCOLORONTHEWAVEFORMGRAPH1ONTHEFRONTPANEL,EXPANDTHEPLOTLEGENDTOINCLUDETWOPLOTS2RUNTHEVINOTICETWOPLOTSNOWAPPEARINTHEGRAPHANDTHEPLOTLEGENDAUTOMATICALLYUPDATESTOINCLUDEBOTHPLOTNAMES3RIGHTCLICKFIRSTVOLTAGEREADINGANDSELECTCOLORFROMTHESHORTCUTMENUUSINGTHECOLORPICKER,SELECTACOLOR,SUCHASYELLOW,SOTHATTHEPLOTISEASYTOREADCHANGETHEPLOTCOLOROFSECONDVOLTAGEREADING4SAVETHISVICOMMUNICATINGWITHANINSTRUMENTINSTRUMENTDRIVERSSIMPLIFYINSTRUMENTCONTROLANDREDUCETESTPROGRAMDEVELOPMENTTIMEBYELIMINATINGTHENEEDTOLEARNTHEPROGRAMMINGPROTOCOLFOREACHINSTRUMENTUSEANINSTRUMENTDRIVERFORINSTRUMENTCONTROLWHENPOSSIBLENATIONALINSTRUMENTSPROVIDESINSTRUMENTDRIVERSFORAWIDEVARIETYOFINSTRUMENTSVISITTHENIINSTRUMENTDRIVERNETWORKATNICOM/IDNETTOFINDADRIVERFORYOURINSTRUMENTIFADRIVERISNOTAVAILABLEFORYOURINSTRUMENT,YOUCANUSETHEINSTRUMENTI/OASSISTANTEXPRESSVITOCOMMUNICATEWITHYOURINSTRUMENTCOMPLETETHEFOLLOWINGEXERCISESTOCOMMUNICATEWITHANINSTRUMENTSELECTINGANINSTRUMENTBEFORECOMMUNICATINGWITHANINSTRUMENT,YOUMUSTSELECTTHEINSTRUMENTWITHWHICHYOUWANTTOCOMMUNICATECOMPLETETHEFOLLOWINGSTEPSTOSELECTANINSTRUMENTUSINGTHEINSTRUMENTI/OASSISTANTEXPRESSVI1MAKESUREYOUTURNONTHEINSTRUMENTYOUWANTTOUSETHEINSTRUMENTMUSTBEPOWEREDONTOUSETHEINSTRUMENTI/OASSISTANTEXPRESSVI2SELECTTHEINSTRUMENTI/OASSISTANTEXPRESSVIONTHEINPUTPALETTEANDPLACEITONTHEA10A11BLOCKDIAGRAM3CLICKTHESHOWHELPBUTTON,SHOWNATLEFT,INTHEUPPERRIGHTCORNEROFTHEINSTRUMENTI/OASSISTANTDIALOGBOXNOTICEHOWTHESHOWHELPBUTTONDISPLAYSTHEHELPTOTHERIGHTOFTHEDIALOGBOXTHEHELPWINDOWONTOPCONTAINSPROCEDURALINFORMATIONABOUTUSINGTHEINSTRUMENTI/OASSISTANTTHEHELPWINDOWBELOWPROVIDESCONTEXTSENSITIVEHELPABOUTVARIOUSCONTROLSANDINDICATORSINTHEDIALOGBOX4FOLLOWTHEPROCEDURESINTHEHELPWINDOWONTOPTOSELECTTHEINSTRUMENTWITHWHICHYOUWANTTOCOMMUNICATE5IFNECESSARY,CONFIGURETHEPROPERTIESOFTHEINSTRUMENT6CLICKTHEHIDEHELPBUTTON,SHOWNATLEFT,INTHEUPPERRIGHTCORNEROFTHEINSTRUMENTI/OASSISTANTDIALOGBOXTOMINIMIZETHEHELPWINDOWACQUIRINGANDPARSINGINFORMATIONFORANINSTRUMENTAFTERSELECTINGTHEINSTRUMENT,YOUCANSENDCOMMANDSTOTHEINSTRUMENTTORETRIEVEDATAINTHISEXERCISE,YOUWILLLEARNTOUSETHEINSTRUMENTI/OASSISTANTEXPRESSVITOACQUIREANDPARSEIDENTIFICATIONINFORMATIONFORANINSTRUMENTCOMPLETETHEFOLLOWINGSTEPSTOCOMMUNICATEWITHYOURINSTRUMENT1CLICKTHEADDSTEPBUTTON,ANDSELECTQUERYANDPARSE2ENTERIDNINTHEENTERACOMMANDTEXTBOXIDNISAQUERYTHATMOSTINSTRUMENTSRECOGNIZETHERESPONSEISANIDENTIFICATIONNUMBERSTRINGTHATDESCRIBESTHEINSTRUMENTIFTHEINSTRUMENTDOESNOTACCEPTTHISCOMMAND,REFERTOTHEREFERENCEMANUALFORTHEINSTRUMENTFORALISTOFCOMMANDSTHEINSTRUMENTDOESUNDERSTAND3CLICKTHERUNSEQUENCEBUTTONTHEINSTRUMENTI/OASSISTANTSENDSTHECOMMANDTOTHEINSTRUMENT,ANDTHEINSTRUMENTRETURNSITSIDENTIFICATIONINFORMATION4PARSETHEINSTRUMENTNAMEASANASCIISTRINGYOUALSOCANUSEINSTRUMENTI/OASSISTANTTOPARSEASCIINUMBERSANDBINARYDATA155CLICKTHEPARSINGHELPBUTTON,SHOWNATLEFT,INTHEINSTRUMENTI/OASSISTANTDIALOGBOXFORMOREINFORMATIONABOUTPARSINGDATA6ASSIGNANAMETOTHETOKENINTHETOKENNAMETEXTBOXATOKENISAPARSEDDATASELECTION7CLICKTHEOKBUTTONTORETURNTOTHEBLOCKDIAGRAMNOTICETHATTHENAMETHATYOUENTEREDINTHETOKENNAMETEXTBOXISTHEOUTPUTOFTHEINSTRUMENTI/OASSISTANTEXPRESSVI,SHOWNATLEFTSUMMARYTHEFOLLOWINGTOPICSAREASUMMARYOFTHEMAINCONCEPTSYOULEARNEDINTHISCHAPTERDAQASSISTANTEXPRESSVIYOUCANUSETHEDAQASSISTANTEXPRESSVITOGRAPHICALLYCONFIGURECHANNELSORCOMMONMEASUREMENTTASKSUSINGTHEDAQASSISTANTEXPR