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ads58c28问题

Other Parts Discussed in Thread: ADS58C28, CDCE62005

配置各种测试模式,结果均正确,正常工作时,改变输入信号的频率,会有一根杂散信号与有用信号相向移动,

输入ADC的信号是纯净的单音信号。

只在中频ADC输入处加一个纯净的单音信号,就在该节点探测时,也有该杂散信号,好像是反射回来的。

请问这是什么原因造成的,是时钟的谐波引起的吗,还是ADC处理上除了问题,但是ADC测试模式是对的。