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 ?