Thanks for answer, so as far as I understand, DAC noise depends on applied signal, am I right? But datasheet parameters are measured under specified conditions i.e. when it comes to NSD, input signal is sinusoid at specified frequency usually few dB under full scale. But still, its just kinda estimation. One more question is, can I calculate noise factor for transmitter the same as for receiver? I mean that I want to somehow estimate noise floor at the output of receiver.
Thanks in advance