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Without Input, ADF5001 Output an Sine Wave

Question asked by SamXia on Sep 26, 2012
Latest reply on Sep 27, 2012 by pwalsh

When there's no input or input is grounded, Eval-ADF5001 Board outputs a sine wave, frequency 5GHz, Peak-Peak Magnitude 400mV. It confuses me and this noise signal severely disturbs my input signal. How to remove this noise signal an where it originates from? I'm wondering about self-oscillating, but don't know how it works on this board. Thank you!