AD9173 DAC in NCO-only mode (...acting like a dual DDS)

While in NCO-only mode AND in programmable modulus mode,  I would like to produce an octave range output 1.5-3GHz while clocking the AD9173 at 12GHz.   I want to confirm that this is possible when using the main 48b NCO (without the channelizers) with a fixed DC level (at reg 148/149).   The JESD inputs would be left floating.

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