AD9957 PLL loop filter problem noisy output

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masoud_maryami2000

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Hi.I have problem with ad9957 PLL loop filter.I have drive this IC without pll in each mode but I can't drive this IC with pLL.I have used the Excel file from Analog Device to design PLL loop filter and PLL lock detect pin always stay true,but my output has some SFDR .can anyone help me about loop filter components value?
 

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