Oscilloscopes add automated test support for OIF and IEEE PAM4

February 02, 2017 //By Jean-Pierre Joosting
Teledyne LeCroy has added fully automated transmitter testing for 56-Gb/s, PAM4-based interfaces. The latest QPHY-56G-PAM4 option adds standards-specific measurement capabilities to a measurement portfolio that already includes the PAM4 signal analysis capabilities pioneered by Teledyne LeCroy in recent years.

PAM4 signaling has become a critical enabling technology for next-generation communications links. PAM4 links operating at 28 Gbaud enable a 56-Gb/s raw data rate on each lane, with multi-lane configurations offering aggregate throughputs of 100G, 200G, and 400G. These interfaces are seeing rapid standardization by OIF and IEEE, defining a challenging set of specific test requirements for designers and test engineers working in this ecosystem.

QPHY-56G-PAM4 simplifies and automates testing to the OIF CEI-56G-PAM4 and relevant PAM4-based IEEE 802.3 interface standards. Measurements include (but are not limited to) eye diagrams, eye widths and heights, linearity, signal to noise and distortion (SNDR), transition time, linear fit pulse peak, and equalizer measurements.

QPHY-56G-PAM4 will initially be available with transmitter test coverage for the OIF CEI-56G-VSR-PAM4 interface standard (both host- and module-output test points). Coverage will expand shortly to include –MR and –LR variants of OIF-CEI-56G-PAM4, as well as IEEE 802.3bs and 802.3cd Ethernet standards.

Teledyne LeCroy's QualiPHY automated compliance test solution platform is designed to reduce the time, effort, and specialized knowledge needed to perform compliance testing on high-speed serial buses. QualiPHY guides the user through each test setup with easy-to-follow connection diagrams, performs each measurement in accordance with the relevant test procedure, compares each measured value with the applicable specification limits, and fully documents all results.

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