檢視调幅的原始碼

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中文名;调幅

外文名;Amplitude Modulation

范    围;在530---1600KHz

解    释;通常说的中波
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使载波的[[振幅]]按照所需传送信号的变化规律而变化，但频率保持不变的调制方法。'''调幅'''在有线电或[[无线电]]通信和广播中应用甚广。

调幅使[[高频载波]]的振幅随信号改变的调制（AM）。其中，[[载波信号]]的振幅随着调制信号的某种特征的变换而变化。例如，0或1分别对应于无载波或有载波输出，电视的[[图像]]信号使用调幅。调频的抗干扰能力强，失真小，但[[服务]]半径小。<ref>[https://wenku.so.com/d/6a43bdb7a88bc1b57fa20817e168c7ac 调幅],360文库 , 2020年7月9日</ref>