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AD9915 ratio signal to noise vs amplitude of signal ?

Question asked by PiotrG on Jun 8, 2014
Latest reply on Jun 11, 2014 by PiotrG

Hallo,

 

   DDS : AD9915

   According documentation of AD9915 there is 12-bit amplitude adjustment of output signal.

   How changes signal to noise value when amplitude adjustment is used ? Does signal to noise value of output signal decreases when amplitude of output signal is decreased by software interface. Other words, for example, when I decrease by software interface amplitude to 0.1 of max value. does on output of AD9915 I still have signal with 12-bit resolution or lower ?

Can anyone explain this in more detail ?

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