FM(FrequencyModulation)即调频。习惯上用FM来指一般的调频广播(76-108MHz,在中国为87-108MHz、日本为76-90MHz),事实上FM也是一种调制方式,即使在短波范围内的27-30MHz之间,做为业余电台、太空、人造卫星通讯应用的波段,也有采用调频(FM)方式的。FMradio即为调频收音机。 扩展资料 振幅调制分类: 1、双边带调幅 ...
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Radio(郑州发射) 90.4 河南人民广播电台My Radio(开封发射) 90.6 河南人民广播电台My Radio(新乡发射) 90.8 新乡封丘综合广播 90.9 中央人民广播电台音乐之声(有可能是长葛发射的) 91.2 郑州人民广播电台交通广播 91.4 河南人民广播电台My Radio(许昌发射) 91.6 卖药台 信号较强 91.8 郑州娱乐广播 91.9 祥符(开封...
其中Am是信息信号的振幅,fm则是信息信号的频率。将此信息信号代入上式即可发现: 其中Δf = KVCO Am代表调频信号与中心频率之间的最大" title="最大">最大频率偏移量,它直接正比于信息信号的振幅及压控振荡器的增益。Δf则称为最大瞬间频率偏移量。频率偏移量Δf与信息信号频率fm的比值称为调变指数 (modulatio...