文档介绍：ECOMMS FinalExam May3,2005Spring2005 12:30–2:30PM Student’sName: DIRECTIONS:Thisexamconsistsofthreeparts–PartA,.(******@10pointseach=40points)Describethespectralartifactsintroducedinanenvelopedetectorwhendemodulatingasingle-(withsketches).Whataretheadvantagesofusingmulti-levelbasebandsignalsinbandpassdigitalmodulationtechniques?Whatarethedisadvantages?DescribeaprocedureforcalculatingthemaximumfrequencydeviationofanICL8038PrecisionWaveformGenerator/-pression?pression?Whyisthislimitnotpracticallyachievable?(Orisit….?)PartBPerformaspectral-,,,m(t),.(20points)LPF(0–2kHz)Accos2pfctm(t)=P(t/1ms)******@800kHzSSBModulatorm1(t)s(t)SSBSignalFigure5:-elerometer-basedCrashNotificationSystemYouaretheleadengineerindesigningacrash