The red pulse and resulting frequency spectrum are clearly different than the correct blue pulse and resulting frequency spectrum with pretrigger delay.
红色脉沖及所得频谱与具有预触发延迟的正确的蓝色脉沖及所得频谱显然是不同的。
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沖击信号的采集。
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.