AD9914 noise floor is lifting up when ever i switch off and switch on the module it come to its normal position when i make its REF clock off and on, can any one suggest on this
What we usually do is turn on the module first followed by the clock source. Perform a reset then DAC calibration. The situation that you described occurs some time whenever we do the setup, that's why we do follow that power sequence to avoid that situation. Kindly check if the power level of your REF clk is between -15dBm to 0dBm.
But in my system clock sourse is from OCXO which comes when ever the power supply is on so the other subsystems does not miss the sequence
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I apologize for the late response. What is the power supply that you are using? I'd like to know about it. It can be possible that it is due to transient action in the power supply that's causing the scenario.
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