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关于ADS54J60芯片在不接入信号的情况下,在250M仍有谱线

Other Parts Discussed in Thread: ADS54J60

如图,我们在使用ADS54J60芯片进行1G16bit采集时,发现在不提供信号时,在250MHz位置仍有一条幅度为-82dB的谱线,此问题是否为正常现象?