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ADF4107 issue

pioneer.liu 在 2014-3-10 詢問的問題
最後回覆由adi_yu於2014-3-12提供

we are using two ADF4107 to produce output frequency, they share one Ref frequency(10MHz), and two same VCO, PFD is 5MHz, step frequency is 10MHz,  Assuming that intial phase of two output frequency 50 degree, why to change R register, two output frequency phase will change when changing R about 200 times, then phase will return to intial phase; but change N register, two output frequency phase don't change?

結果