《电子信息专业英语》课件 Lesson 18 Signal generator.pptVIP

Lesson18SignalgeneratorKeywords■configure配置■parameter参数■modulate调制■carrier载波■instantanous瞬间的■amplitude幅度■transmission传输■channel调制

■工作任务：如何产生高频连续信号，调制信号和扫描输出？■学习目标：掌握射频信号发生器的功能和基本操作■重点难点：射频信号发生器的基本操作■推荐学时：6学时

工作任务：任务1：Configureawaveof700MHzand-20dbmwithN5181A/82AMXGGenerate

PresetthesignalgeneratorToreturnthesignalgeneratortoaknownstate,presseitherPresetorUserPreset.Presetisthefactorypreset;UserPresetisacustompreset.Toresetpersistentsettings(thoseunaffectedbypreset,userpreset,orpowercycle),Press:UtilityPowerOn/PresetRestoreSystemDefaults.Wealsoshouldcaution：Toavoidthelossofdata,GPIBsettings,orcurrentuserinstrumentstatesthathavenotbeenpermanentlysavedtonon-volatilememory,theMXGshouldalwaysbepowereddowneitherviatheMXGsfrontpanelpowerbuttonortheappropriateSCPIcommand.MXGsinstalledinracksystemsandpowereddownwiththesystemrackpowerswitchratherthantheMXGsfrontpanelswitchdisplayaError-310duetotheMXGnotbeingpowereddowncorrectly.

Makethesignalgeneratordisplaythedesignatedfrequencyandminimumpowerlevel.

SetRFfrequencyPressFreq700MHzstepbystep.

InFrequencymode,thismenuisautomaticallydisplayedwhenenteringanumericvaluewiththefrontpanelkeypad.

SettheRFamplitudePressAmptd-20dBmstepbystep.

InAmplitudemode,thismenuisautomaticallydisplayedwhenenteringanumericvaluewiththefrontpanelkeypad.DBuVemfterminatesthevalueasdBuVelectromotiveforce.Emfistheoutputvoltagewithnoload.Thisunitisexternalonly.InternalrepresentationaswellasincrementanddecrementvaluesareindBm.Note:dBuV,mV,andnVemfbehavesimilarly(i.e.Valuesareexternalonly.InternalrepresentationaswellasincrementanddecrementvaluesareindBm.).

TurnontheRFOutputPressRFOn/Off，theRFoutputLEDlights,indicating