Another somewhat important test consideration for impact testing relates to the need for pretrigger delay.
锤击试验另一个比较重要的测试注意事项是关于预触发延迟必要性的。
The data sampling include two kind: free sampling adapted to random signal and pretrigger sampling adapted to impact signal.
数据采集包括自由采集和预触发采集两种，分别应用于随机信号和冲击信号的采集。
The red pulse and resulting frequency spectrum are clearly different than the correct blue pulse and resulting frequency spectrum with pretrigger delay.
红色脉冲及所得频谱与具有预触发延迟的正确的蓝色脉冲及所得频谱显然是不同的。
Since the measurement initiation is controlled by the leading slope of the pulse, part of the pulse is lost and the resulting spectrum is distorted unless some pretrigger delay is specified.
因为测量的引发是由脉冲的前导沿控制的，除非设置一定的预触发延迟，否则会丢失部分脉冲、造成频谱失真。
Since the measurement initiation is controlled by the leading slope of the pulse, part of the pulse is lost and the resulting spectrum is distorted unless some pretrigger delay is specified.
因为测量的引发是由脉冲的前导沿控制的，除非设置一定的预触发延迟，否则会丢失部分脉冲、造成频谱失真。
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