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请问这个电信号的带宽是Tr*fH=0.35中的信号带宽吗，还是单纯的指于信号的保持时间的倒数？想请问一下示波器中这样的信号的带宽大约是多少呢，我该如何选择放大器呢？（其实这是一个光电信号经过了二级放大之后的波形了，我不是很确定它是否已经失真）
按照 Tr*fH=0.35 算吧, 这个信号上升沿非常快, 带宽很高咯
