The PCB I made according to the evaluation circuit(AD9852 Evaluation Board Schematic) can't output at full range. I want to generate a 7MHz signal, the system clock is 100MHz. When Rset is set to 3.9kohms, and OUTPUT WORD is 4095, the Iout1 is only 350mVp-p, which should reach 500mVp-p. What might be the cause of this situation. A cross indicates disconnection and a short line indicates connection.