We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.
FFT需要满足采样率需要大于信号带宽的两倍，否则FFT后结果会有偏差。
信号带宽估算为0.5/TR(TR指上升沿)，那么采样率需大于2*信号带宽=1/TR。又因采样率=采样点数/采样时间。采样时间=stop-start。所以要求[2*(maxF/deltaF）+1]/(stop-start)需大于1/TR
其实默认将max freq尽量调大就好
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