question about sine_lut data

Hi ad9361 experts:
    I am using zc706-fmcomms3. AD9361 NO-OS software. I want change the sine_lut array, and send my own data. But I am confused about the content of the sine_lut. How should my data be arranged? I tried I1, Q1, I1, Q1, ... but the output waveform is not the desired. Could you please give some advice? Should I change the logic in the dac_init function? How should I arrange the data?