FM launcher can change navigating audio signal into frequency modulation signal, and playing.

FM发射器可将导航音频信号转换为调频信号播放.

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While a sine - wave modulation signal is shown, any wave shape could be used.

然而当正弦 波调制信号 显示时, 任何波形都可以使用.

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A new lithology identification method based on axial amplitude modulation signal of drill string is proposed.

提出了一种利用钻柱轴向振动调幅信号实现岩性识别的方法.

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