记住对于选择正确的滤波器系数，采样频率很重要。
Remember that the sample rate is very important to choosing the right coefficients.
DAQ设备可以更容易监测好采样频率为600 Hz的信号。
The DAQ device can then breathe easier and sample at only, say, 600 Hz.
你知道采样率是恒定的，你只是不知道频率。
You know that the sampling rate is constant, you just don't know its frequency.
你知道采样率是恒定的，你只是不知道频率。
You know that the sampling rate is constant, you just don't know its frequency.
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