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PWM The modulated waveform consists of two parts: the carrier waveform and the modulating waveform, the carrier waveform is only pulse. In PWM, the pulse width of pulse varies with the instantaneous voltage of the modulating waveform. The parameters for the PWM are as shown in Figure 2- 38. Figure 2- 38 Setting Interface of PWM Waveform Parameter Press Mod → Pulse →PWM, to enter the following menu. Figure 2- 39 SDG5000 User Manual 59