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Superimpose different sine wave or square wave or saw tooth wave

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我用的是ni-usb-6366,想通过设备的输出口输出波形给dewesoft。例如:200Hz正弦波+100Hz正弦波。我只能看到dewesoft接收到的数据通过FFT变换200Hz的峰值。如何正确模拟复杂波形?


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