I am interfacing AD9954 with microcontoller but before I upload he program or configure the DDS registers with SPI bus I want see the default output. Which port can give any output without programming the IC? What should it be? or If I can see any output at all ny just supplying the DC voltages. Please help me I am struck with this issue for over a month. I am using Arduino Due for interfacing. I have checked and rechecked the program it is ok. But I do not get any output.