Maybe I have a stupid question, what does the fuction of the ad_xcvr? I have known that it acts as phlsical layer for 204B. But I find that the xilinx physical core acts as 8B/10B(PCS and PMA included). But I find ADI inc the link's function is 8B/10B, as the page showed. My question is that the util_xcvr acts as just PMA( 8B/10B in link layer) ,that is the util_xcvr doesn't have PMA and PMA is in the link layer? It's right?