I am trying to communicate with the AD4350 on the AD9739A-FMC-EBZ. I am connecting the AD9739A-FMC-EBZ to the LPC connector of the Xilinx ZC706. I can see my serial signals making it to U1 on the AD9739A-FMC-EBZ but on the output side of U1 the signals are corrupted. That is, they are very rounded off and the clock is riding on top of a 1 volt signal. So, the interface doesn't work.