We are using kintex705 with fmcomms4. We have hdl reference design for Vivado2013.4 with the recent version of NoOS driver.
We are running an OFDM modulator with tx_samp_freq of 10MHz which is 20MHz on data_clk.
We measure the data_clk, rx_frame signals on the test points. We found the delay of 3ns between data_clk and rx_frame, which is different than t_DDDV (1.25ns) mentioned on Page 103 in UG-673.
What could be the reason of this difference?
Thanks in advance.
Vaibhav and Payam