The AT4039E is a fully featured 400G BERT that can be configured as a 4-channel PAM4 56 GBaud or 4-channel NRZ 56 Gbps lanes. Also, half rates of 28GBd are supported in PAM and NRZ modes. The transmitters support all standard test patterns mandated by IEEE and OIF such asPRBS13Q, SSPRQ, PRBS31Q, etc…
The user may also program the TX to output a user-defined pattern up to 131 kb long.