Regarding GTH IP on TE0817

[siddadd]

Hi,

I am using the TE0817 SoM with the TEBF0818 carrier card. I am using the GTH on the FMC connector for transmitting and receiving data using 64b66b encoding/decoding. I am using the default GT ref clock of 100 MHz for a line rate of 3.6 Gbps. The Tx-Rx modules work in simulation using the Xilinx GTH IP. However, when testing on the board I notice that the Tx - Rx link disconnects arbitrarily causing data corruption. I have checked that the GTH QPLL locks and it stays locked. Also the Tx and Rx buffer status do not indicate any errors.

I have added ILA probes on the TX side and it seems that the issue could be at the Tx interface, since I notice glitches on the CDC FIFO interfacing with the GTH User Tx clock.

Is there any way to identify what could be the issue? Is there a way to measure the user clock frequencies on the oscilloscope? Are there any test points to probe some of the other GTH signals?