AD5930 configuration


I am using AD5930 evaluation board to generate waveform. One application is to generate a single frequency waveform, say 100KHz. Another one is to generate a sweeping frequency signal. I configured the board following the steps of its software as shown in

I selected the on-board oscillator (Position A of LK3). However, I cannot get waveform output at IOUT and IOUTB. Could anyone tell me how to make it work? Thanks.