为什么拍频信号的频谱看不见？
求助，为什么看不见拍频信号的频谱🆘 ZD$I-33W
激光器扫描区间:1545nm-1555nm 8(A
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激光器扫描速度：50hz/s 也就是说扫描速度为500nm/s 6 W$m,3Dg
延时光纤：1m K&dc< 4DC
采集卡速度:2M _x`:Ne?
采样点数:40000 4IM&#_6
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