Hi Reza After programming the LMK01020 the SYNC event must be used to synchronize the various dividers in the system. If the divide values are then changed while the dividers are operating, I don't think the changes will be glitchless. The divided output clocks can glitch on the transitions, which will give inconsistent numbers of clocks to each of the 3 converters. So even if they are synchronized at 375 MHz clock rate I don't think they will be synchronized once the clocks are increased to 1.5 GHz rate. Regards, Jim B
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