New SierraNet T328 Protocol Analyzer Captures and Decodes Auto-Negotiation and Link-Training Sequences

Press Release Summary:

The SierraNet T328 Protocol Analyzer allows higher data rates and is suitable for future data centers and cloud services. The unit helps in identifying and reducing link-interoperability problems between components like switches, routers, network interface adapters, servers and NAS. SierraNet T328 with NET-T200-P4L-A license allows network and design engineers to troubleshoot 50GbE through 400GbE connectivity issues.

Original Press Release:

Teledyne LeCroy's SierraNet T328 Protocol Analyzer Now Supports PAM4 50G-400G Ethernet

Industry first PAM4 analysis solution paves the way to higher data rates and link interoperability and is ideal for future data centers and cloud services

SANTA CLARA, Calif., Aug. 6, 2018 /PRNewswire/ -- Flash Memory Summit 2018 – Teledyne LeCroy, the worldwide leader in protocol test, today announced the industry's first trace capture and analysis solution for the 802.3cd and 802.3bs 50/100/200/400GE four-level pulse amplitude modulation (PAM4) Ethernet specifications. With the new NET-T200-P4L-A license to the SierraNet T328, the platform enables higher data rates and enhanced reliability for future-generation data centers and cloud-based services.

Data Centers will be implementing PAM4 fabric in order to reach higher data rates. However, PAM4 signals are more susceptible to errors in noisy environments. To reduce the error rate, systems negotiate transmission parameters that maximize signal quality at the receiver. PAM4 Systems designers are demanding the link-layer analysis capabilities to ensure the negotiation among components is effective. With the NET-T200-P4L-A license, the SierraNet T328 helps identify and reduce link-interoperability problems between major fabric components such as switches, routers, network interface adapters, servers, and Network Attached Storage (NAS). By capturing and decoding the auto-negotiation and link-training sequences, the SierraNet T328 with the NET-T200-P4L-A license enables network and design engineers to troubleshoot 50GbE through 400GbE connectivity issues today, thereby gaining a time-to-market edge for tomorrow's data-infrastructure equipment. Teledyne LeCroy's patented TAP4 passive probing technology enables this PAM4 solution by passing the data stream without interruption. Probes that terminate the signal don't offer a view into the component to component negotiation sequence.

"As an industry leader in the data-center market, Hewlett Packard Enterprise (HPE) is keenly aware of the need for high reliability and zero downtime in the enterprise data center. We have extremely high standards, and the Teledyne LeCroy SierraNet T328 is an important part of our meticulous design and validation processes that are dedicated to assuring the complete interoperability of our products within the data center," said Perry Hoffman, Master Technologist at HPE.

"By providing real-time trace capture, decode, and analysis of the auto-negotiation and link-training functions, the SierraNet T328 has become the de facto standard for high-speed protocol analysis in development, debug, and test applications," stated David J. Rodgers, Ethernet and SAN Product Line Manager at Teledyne LeCroy.

To learn more about Teledyne LeCroy's SierraNet T328 and support for PAM4, contact Teledyne LeCroy (1-800-553-2769) or visit Teledyne LeCroy's website at

About Teledyne LeCroy

Teledyne LeCroy is a leading manufacturer of advanced oscilloscopes, protocol analyzers, and other test instruments that verify performance, validate compliance, and debug complex electronic systems quickly and thoroughly. Since its founding in 1964, the Company has focused on incorporating powerful tools into innovative products that enhance "Time-to-Insight". Faster time to insight enables users to rapidly find and fix defects in complex electronic systems, dramatically improving time-to-market for a wide variety of applications and end markets. Teledyne LeCroy is based in Chestnut Ridge, N.Y. For more information, visit Teledyne LeCroy's website at

Editors' Technical contact:

David Rodgers, Senior Product Marketing Manager 

(408) 486-7211

Customer contact: 

Teledyne LeCroy PSG Customer Care Center 

(800) 909-7211



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