some questions about DP83848K to generate test code for measuring the signal quality of Enthernet

Hello,Friend;

     I use DP83848K in my device, now I want to evaluate the signal quality in the end of cable.

    The question is: How do I use DP83848K as a driver to generate test code to measure the signal quality of  100Base-TX Ethernet? if possible,Please provide me with a relveant test report.

   I am looking forward to receiving your replay.

                                                                                                                                                                       THANKS!