Could you describe, at a high-level, what is needed to operate the AFE7444 at 5.6 GHz( data sheet references up tp 6 GHz)? Does this utilize the 2nd Nyquist or is there another method?
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Yes. For DAC output at 5.6GHz, second Nyquist is used. DAC should be operated at 9GSPS. First Nyquist image will be at at 9-5.6 = 3.4GHz. Output circuit (RF balun, amplifier or filter) can be chosen such that 3.4GHz output is attenuated.
Thank you Vijay. On the receive side would we just let the 5.6 GHz alias around the 3 GSPS? Also, when we choose deceimation, I assume that a corresponding low-pass filter is incorporated (polyphase).
Thank you again for your help.