The AD9781 has a FS current level of 20.2mA nominally. Assuming I am driving a 50Ω load on the output, for normal mode operation I would assume the power level at 500MSPS is IFS²*RL=Pout or that the RMS voltage can be found with the same load and current. These calculations result in an output power level around 10dBm. When going through the data sheet, there is Nominal Power figure on page 15 (inserted below). I'm unsure what exactly the amplitude in the figure below is referencing. Is it referencing nominal output power of the DAC, and if so what is the impedance of the load and am I calculating output power correctly? If not, what else would the nominal power in the fundamental be referencing besides the fundamental harmonic output power?