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Problem in successive writes to ADF4350

Question asked by vinayn on Jun 8, 2012
Latest reply on Jun 25, 2012 by vinayn


I am using ADF4350 to generate a frequency sweep of 1.1 GHz to 1.3 GHz. But when I try to write the part successively, it is not getting locked. The lock detect LED is blinking continuously but with less brightness and suddenly with high brightness in between.

When I program the part for a single frequency, the LD LED shows a perfect lock.

What could be the problem? My specifications are:


REFin = 16 MHz   MOD =130 INT = 137 FRAC = 65


The corresponding pll file is attached.