I am testing the GTP with iBERT. Near-end PCS loopback works, but not
near-end PMA. Any clues?
Also my CLKIN is 122.8 but the TXUSRCLK2 is 115.22 i.e. (15/16)*CLKIN,
How does the IBERT compute the TXUSRCLK and TXUSRCLK2?
Can I control the parameters of the PLL and DCM for TXUSRCLK and TXUSRCLK2?
Via UCF maybe?