Rohde & Schwarz is expanding its deal with the University of New Hampshire's Interoperability Laboratory (UNH-IOL) in the US to develop automated compliance test systems for 800Gbit/s Ethernet and InfiniBand links over copper.
The two have pooled their expertise to provide methods of implementation (MOI) for precise, fast and error-free compliance testing of high-speed cables and backplanes in line with IEEE 802.3 (up to IEEE 802.3ck) and InfiniBand standards (up to rate designator HDR), using R&S vector network analysis test equipment.
The latest Ethernet IEEE 802.3ck specifications are scheduled for publication later this year and will allow data rates up to 800 Gbit/s but require more stringent compliance testing. Infiniband has an extension planned for 2021 for throughput rates up to 1200 Gbit/s when combining several links. Long-distance transmission in both standards is handled via optical links but to bridge short distances, high-speed copper cables are used. To secure reliable data transmission with these extremely high data rates, cable compliance tests are needed to provide confidence in the products.
UNH-IOL is a worldwide reference for cable compliance tests, and cable manufacturers turn to the interoperability laboratory for their testing services. Last year, Rohde & Schwarz provided UNH-IOL with a R&S ZNBT40 multiport vector network analyzer (above) with 16 integrated test ports, covering up to 40 GHz, to support efficient testing.
UNH-IOL has created the methods of implementation (MOI) for IEEE 802.3 Ethernet and InfiniBand based on their superior experience. The MOI describe exactly how to perform compliance test measurements on high-speed cables and backplanes to fulfil the corresponding specifications.
"The MOIs along with the included state files provide excellent guidance for the industry and describe the test steps as well as the calculations of channel operating margin (COM) and effective return loss (ERL). Later this year, we plan to provide automatic scripts based on our R&S ZNrun test sequencer software that will further simplify compliance tests. We are excited to pursue this goal together with the UNH-IOL," said Martin Stumpf, Market Segment Manager High Speed Digital Design Test at Rohde & Schwarz.
Bob Noseworthy, principal engineer, at UNH-IOL, says: "After a successful collaboration with Rohde & Schwarz to develop this MOI, we look forward to further collaboration to extend UNH-IOL high speed cable conformance testing capabilities in the near future."
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