《電子信息專業(yè)英語(yǔ)》課件 Lesson 17 Oscilloscope

Lesson17oscilloscopeKeywords■radio收音機(jī)■button旋鈕■input輸入

■output輸出■coupling耦合

■component元件■sensitivity靈敏度

■scan掃描■automatic自動(dòng)

■measure測(cè)量■cable電纜■工作任務(wù)：如何利用示波器判斷收音機(jī)的頻率失真？■學(xué)習(xí)目標(biāo)：掌握示波器的基本功能和使用方法，以及它在通信領(lǐng)域的應(yīng)用?！鲋攸c(diǎn)難點(diǎn)：示波器在通信領(lǐng)域中的應(yīng)用■推薦學(xué)時(shí)：6學(xué)時(shí)工作任務(wù)：Howtocalculatethefrequencydifferenceofaudiosignalsandoutputsignalsofradiousingtheoscilloscope?InputTurnonpowerToachievethegoal,youmaytrythefollowingtips.CheckandadjustmentbeforeusingoscilloscopeItisnecessarytomakeappropriatelyadjustmentwhenfirstusingoscilloscope.

SelectcouplingmodeSelectsensitivityofyaxisthebiggerwheelthesmallerwheelWeshouldselectpropersensitivityaccordingtopracticalsituation.SelectthesourceoftriggeringsignalsandpolaritySelectscanningspeedLikethesensitivity-selecting，weshouldselectappropriatesensitivityaccordingtopracticalsituation.thebiggerwheelthesmallerwheelInputmeasuredsignalFig-10

Asanalternative,"Chop"modecanbeusedtodisplaytwosignalsonthescreen.Chop-modeisonwhenboth,the"Dual"buttonandthe"Add"buttonarepressed.Example1：ChoosethesameY-positiontomakesurethewavesareatthesamereferenceline.

Example2：ToappropriatelyadapttheX-positiontomakesuregridsareatthestartingpointoftheperiod，soastoaccuratelycalculatethefrequencyoftheoutputsignals.Then，wewillgetthewaveslikethis：Definitely，ifyouthinktheimageisnotclear，youcouldachieveitthroughadjustingthe“FOCUS”.Questions1:whatisthemainfunctionoftheoscilloscope？2:Canyoubrieflysummarythetipsofmeasur