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AD9914 output spur insto major

Question asked by yuntianming on Mar 19, 2017
Latest reply on Mar 20, 2017 by mcee

  I use AD9914 output 470M signal, register 32Bit, after I repeatedly switch my reference signal, the output noise floor will raise 30dB, pls see the attached. do you have any suggestion?
  I  configure internal registers to 8 bits,it become OK, How to configure the AD9914 internal registers ?

  Thank for your answer.