
信号发生器给出1K频率的方波,同步信号相移180°,测试的结果应该是500us可是测试得到的数据499.990us相差了10ns,请问是什么原因造成的呀?

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信号发生器给出1K频率的方波,同步信号相移180°,测试的结果应该是500us可是测试得到的数据499.990us相差了10ns,请问是什么原因造成的呀?
