The Aurora 8B/10B core defines RXDISPERR and RXNOTINTABLE using the soft_error signal. If the core asserts the soft_error signal, probe the RXDISPERR and RXNOTINTABLE ports of the transceiver. If the transceiver indicates a RXDISPERR or RXNOTINTABLE error, enable internal loopback and check again. If the loopback test passes, check the transmitted data and cable for channel integrity. Run integrated bit error ratio test (IBERT) to confirm the link connectivity and signal integrity (SI) on the channel. If the IBERT runs fail, monitor the power supplies, check the termination circuit, run SI simulations, check LPM versus DFE based on attenuation, etc. Also, enabling the scrambler option in the core is useful to check EMI issues generated over the link.