Hello Kang
According to the your answer,
finallly The DAC5687 can not be configured operating different frequency at a same time. My customer wants the DAC5687 to be used for Repeater which need RX path and Tx Path in FDD(Frequency Division Duplex) full Dupulex Mode.
Actually the customer asked me to compare AD9777 of ADI with DAC5687. All things of DAC5687 are OK but this function(independant setting Complex mix) does not meet ADI..
Only same frequency in chA / ChB can be configured operation at a same time.
Thanks and Best Regardds