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As an example, if we set up a data capture with an Fmax of 1 KHz (60,000 CPM) and 4 averages and 800 lines, we will see a data capture time of 2 seconds. With this setup, we will be able to see a separating frequency of 225 RPM. The deciding factor on parameters for the measurement depends on the coast down time of the machine. If it is coasting down faster than 225 RPM in 2 seconds, we might need to reduce lines of resolution or averages or increase Fmax in order to be able to gather more points of data during the coast down.
Fmax是1k,谱线数是800,
分辨率=1000/800=1.25Hz,采样点数是800*2.56=2048点,
采样总时间怎么就是两秒了?4 averages 又是什么?
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