Recently, when I program FPGA on ACE using AD6688-3000EBZ with ADS7-V2EBZ, I measure
the output clk of AD9577 of ADS7-V2EBZ with oscilloscope, but sys_clk of AD9577 output to FPGA has nothing. but DDR3 clk of AD9577 output is 200MHz,80mv peak to peak. First I can confirm that the ADC's JESD204B PLL is locked and the refclk J3 of ADS7-V2EBZ is right,but I can not capture data from ace. When I use EVAL-AD9172 and ADS7-V2EBZ , I can get output data of EVAL-AD9172. So I think when ADS7-V2EBZ work with EVAL-AD9172 , the source data is directly generated by FPGA and transferd to DA by JESD204B, but When ADS7-V2EBZ work with AD6688-3000EBZ, the data is already transferd to FPGA from AD, it is just not transfer from FPGA to DSP.The sys_clk of AD9577 of ADS7-V2EBZ is maybe tranfer clk .