可否请教一下 FM 及 AM 的问题 1] A complex waveform (the carrier) with a fundamental frequency of 2k Hz is amplitude modulated by a sine tone with frequency of 200 Hz, (the modulator). Because the carrier is a complex waveform, a sideband pair will be formed around each of its original partials. If the partials of the carrier waveform are 2000, 3000, 5000, and 7400 Hz, what will be the frequencies of the resulting spectrum? Remember to include the frequencies of the carrier waveform in your answer. 2] A single tone of 2500 Hz (the carrier) is frequency modulated by a sine tone (the modulator) of 140 Hz. Assume that three sideband pairs will be created. What will be the frequencies of the resulting spectrum? 我不是学 电机 电子 物理 或 类似这些的,故搞不懂 请 不吝指导提示帮忙 谢谢 ^_^ -- 老音学生 --