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ADC32RF42EVM: ADC32RFXX EVM GUI

Part Number: ADC32RF42EVM
Other Parts Discussed in Thread: LMK04828

您好,我们定制了一块ADC32RFXXX EVM的开发板,ADC和时钟部分的原理图都和开发板一样,LMK04828的时钟输入信号为100MHz,VCO倍频至3G,当我们用LMK04828的DCLK0给FPGA产生250MHz的时钟无法产生相应的波形,并且小于250M的波形质量都比较差,以上是我们用示波器测量各个频率之下的波形。我想问一下这是什么原因导致的呢