Hi team，
My client used DP83TC812S-Q1 in the TBOX project, and found that the radiation exceeds the standard during the EMC test, and the interference point (multiplier) of the main frequency of 63.5MHz and 635MHz.
The actual waveform measurement found that the SGMII signal (RX and TX) jitters quite severely, and the customer has done some processing for this interference point, but the effect is not obvious. I would like to communicate with you whether there are other measures.
For example:
1- Overall shielding of the unit module;
2- Series common mode inductor;
3- The signal adopts AC coupling and direct connection
Schematic attached
Looking forward to your suggestion！
Thanks！
