Amplitude modulation is to control the amplitude of signal carrier and make it change linearly with modulation signals and maintain its frequency.
幅度调制是用调制信号去控制载波的振幅，使其随调制信号线性变化，而保持载波的频率不变。
This modulation include either amplitude modulation or frequency(phase) modulation.
包括幅值调制和频率（相位）调制两部分。
Under the same amplitude modulation index and same frequency modulation index, different SVM waveforms can be derived from different sampling point distributions.
相同频率调制比和幅度调制比的情况下，对调制波信号的不同采样点分布可以得到不同的SVM波形。
We also analysed the influence of amplitude modulation and frequency (or phase ) modulation on Interferometer Direction Finder.
对三波道干涉仪测向结果不受幅度调制和频率调制（相位调制）的影响进行了数学分析。
Because of stepless frequency modulation and amplitude modulation and operating with facility, hydraulic vibrators are being used widely in a lot of engineering machines.
液压激振器由于具有无级调频、调幅和操作方便等优点而在许多工程机械中得到广泛应用。
The system adopts AGC circuit, uses DDS technology to realize such functions as frequency modulation, amplitude modulation, ASK, PSK, etc.
系统采用自动增益控制电路，并运用DDS技术实现调频、调幅，ASK、PSK等功能。
In frequently used methods, sine wave is used as carrier with amplitude modulation (am), frequency modulation (FM) and phase modulation (PM) implied.
常用的调制方式使用正弦波作为载波并对其进行幅度调制(AM)和角度调制即调频(FM)或调相(PM)。
The present invention provides a structure in which an amplitude-modulation mode and a frequency-modulation mode are switched.
本发明提供了一种结构，其中振幅调制模式和频率调制模式被切换。
The present invention provides a structure in which an amplitude-modulation mode and a frequency-modulation mode are switched.
本发明提供了一种结构，其中振幅调制模式和频率调制模式被切换。
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