Keysight Technologies (Santa Rosa, CA) introduced the M8040A bit error rate tester (BERT) for testing PAM-4 and NRZ devices that operate up to 64 GBaud. Engineers in validation labs and R&D who characterize receivers on the physical layer for the next generation of data center interconnects can use the device for test setups and repeatable results. The pattern generator module provides built-in deemphasis, jitter injection, and an optional second channel. Users can select PAM-4 and NRZ in the user interface, eliminating the need for external combiners, cabling, and de-skew to provide PAM-4 signals. For best signal quality, remote heads reduce the distance to the device under test.

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