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Question about AD9691 in Complex output mode

Question asked by Se-woong on Nov 18, 2016
Latest reply on Nov 22, 2016 by UmeshJ



My customer use AD9691 and they confirm the normal output at DDC Bypass (Real Output) mode.

However they got a issue at Baseband I/Q(Complex Output) Mode.


Regadless of Signal input, they can confirm that unknoen datum are receved at both Port A and B.

So they need your advice for solving this issue.


Please refer attached document with their test purpose,Setup, AD9691 operatopn and etc.


Would you confirm why these unknown datum are received at both Port A and Port B in Baseband I/Q(Complex Output) Mode?


And also how to remove these unkown datum if these are for abnormal operation of AD9691?


Please advise me.


If you have any questions, please let me know