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配置LMK04828使用双PLL模式,只有PLL2能锁定,PLL1无法锁定

Other Parts Discussed in Thread: LMK04828

时钟源从CLKIN0进入的LVDS 100MHZ,OSCIN输入CVHD-950-122.88M单端交流耦合,一级环路滤波参数C1=0.1u,R2=39K,C2=0.68u,参照的是选用的AD芯片原理图,上电加载程序后,CPOUT1基本稳定在1.6-1.7V(万用表显示1.63V,考虑到有测量误差),查看0x183寄存器得知PLL1确实没有锁定,PLL2能锁定,请问下怎么解决啊?多谢