简介:T-180是八达应广大音响发烧友要求而开发的高级数字调谐器,T-180A型则加入音色迷人的电子管作放大输出,令声音柔顺、音场更宽阔,收音效果直追CD。
简介:ThepassivebistaticradarbasedontheFMbroadcasthasinherentsuperioritywithrespecttoitssurvivability.Inthisarticle,theambiguityfunction(AF)andthecrossambiguityfunction(CAF)oftheFMradiosignalareanalyzedandillustrated.TheKolmogorovSmirnov(K-S)testverifiesthattheamplitudeprobabilitydensityfunctionoftheCAFsidelobesisexponential;thedistributionofthetargetisalsodeduced.Finally,thedetectionperformanceofthepassiveradarisstudied,andtheresultshowsthatthisnewtypebistaticradarhasfavorabledetectioncapability.
简介:TheeffectofreflectionontheperformanceofAM-VSBCATVlightwavesystemsisanalyzed.Usually,therearethreekindsofreflectionexistingintheAM-VSBCATVlightwavesystems:multipathinterference(MPI),doubleRayleighbackscattering(DRB)andexternalopticalfeedbackTheMPIandexternalopticalfeedbackcanbeneglectedowingtousingtheFC/APCconnectorsandisolatedDFBalsersinthesystemlink.ItisshowntheoreticallyandexperimentallythattheDRBisthelimitationofthenoiseinducedbyreflection.