we are noe testing AD9681 with zynq ZC706 , we used Analog devices Interposer in the setup ,
we enabled test mode of the chip and we got the following results
our working mode was default configuration ( 16 bit , byte mode , sampling frequency = 25MHz ).
We Expect FCO signal to be has freq 25Mz = 1/4 of bit clk frequency
The Problem FCO has strange behavior as shown in the image ,Although the code working fine in this case but it did not work at all when we used normal mode.