Xgig U.2-Server, 4-lane Interposer Module for PCI Express 5.0

The Xgig® U.2-Server Interposer is optimized for development, debugging and tuning of NVMe SSD operation in high-density storage servers with U.2 connections

The VIAVI 4-lane, U.2-Server Interposer for PCIe 5.0 uses high-speed linear signal redrivers to restore signal quality of the PCIe data lanes across the Interposer between host system and SSD devices-under-test. This Interposer enables debug and verification of new NVMe controller ICs, new system implementations, firmware, validation of system BIOS and software, and for manufacturing test quality assurance.


  • Provides consistent, repeatable capture of link training, equalization and other in-band and side-band data
  • Faster analysis and problem isolation
  • Quicker time to market and earlier revenue
  • Lower engineering costs


  • Optimized for development, debugging and performance tuning of NVMe SSD operation in high-density storage servers
  • Used for IC development, debug and validation, subsystem and system-level testing, firmware and driver development and validation, and performance analysis
  • Works with VIAVI Xgig 5P8 and 5P16 PCIe 5.0 Analyzer/Exerciser/Jammer chassis


  • Operates up to and including 32GTps, PCIe 5.0 data rates
  • Downward compatible with PCIe 1.0, 2.0, 3.0 and 4.0 data rates of 2.5, 5.0, 8.0 and 16GTps
  • Supports 1 link of 4 lanes, or dual-port operation of 2 links of 2 lanes each
  • Front-end module plugs into system-under-test
  • U.2 NVMe SSD DUT (not supplied) plugs into the Back-end module
  • Adjustable tray clamps and quick-release latch allow for snug fit and hot swap testing
  • Data path uses high-speed linear redrivers to ensure good signal capture with minimal tuning
  • Supplied with high-quality, custom cables for Analyzer system attachment
  • Supports Analyzer side-band signal triggering and capture via custom cable
  • Supplied power brick makes Interposer power independent of host system
  • LEDs give quick indicators of power and status
  • Provides consistent, repeatable capture of link training, negotiation and other data
  • Supports error injection for deep system analysis
  • Supported by Xgig tool suite including Trace Control, Expert and Serialytics

Related Products

Support at Every Step

We provide support, services, comprehensive training and the resources you need. It’s all part of what we do to maximize the value of your VIAVI investment.

Let Us Help

We’re here to help you get ahead.