Could you please provide two output capture image of AD9144 via the evaluation board ?
Output signal conditions :
- fout = Single Tone, fdac = 1920MHz, 8x interpolation, INV SINC filter enable
Case 1 : NCO = 180MHz
Case 2 : NCO = 300MHz
Pls see the figure 73 in the data sheet, the difference between those 2 outputs level should be less than 1dB