wave envelope การใช้

• Intuitively the wave envelope is the " global profile " of the wave, which " contains " changing " local profiles inside the global profile ".
• Increasing the modulating signal beyond that point, known as overmodulation, causes a standard AM modulator ( see below ) to fail, as the negative excursions of the wave envelope cannot become less than zero, resulting in distortion ( " clipping " ) of the received modulation.