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LMX2572PLL不能锁定

ma yubo
Prodigy 30 points
Other Parts Discussed in Thread: LMX2572

LMX2572的PLL锁定状态不稳定，寄存器配置为TICS PRO里的默认配置，只更改了channel divider和OSCin的类型，OScin为100M的差分信号，也已经确认OSCin有有效稳定的输入，写入寄存器后，PLL锁定的状态灯亮一会就灭了。这是什么问题呢