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.