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U4328A M.2 PCI Express Interposer Socket 3 (M-key)

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Starting From US$ 11,474


Prices for: United States

* Prices are subject to change without notice. Prices shown are Manufacturer's Suggested Retail Prices (MSRP). Prices shown are exclusive of taxes.

Key Features & Specifications

Accurate data recovery with faithful representation of the signal

  • Supports 2.5 GT/s (Gen1), 5.0 GT/s (Gen2) and 8.0 GT/s (Gen3) speeds
  • Uses the ESP (Equalizing Snoop Probe) technology to ensure accurate data recovery in all Gen3 platforms and all link widths x1 through x16
  • Ensures problems in your design can be reproduced; the slot interposer probe has a faithful representation of the signal
  • Supports socket 3, M/B-M
  • Comes in a kit that supports all standard M.2 sizes – 2230 through 22110


PCIe® - PCI Express and PCIe are registered trademarks of PCI-SIG.

The Keysight M.2 interposer probe for PCI Express utilizes the ESP technology to ensure that the data captured is 100% accurate. The U4328A enables probing of storage solutions based on the M.2 interconnection standard.

Perfectly designed to connect between a Solid State Drive (SSD) and the host that uses the M.2 connection, the U4328A M.2 interposer enables monitoring of x1, x2 or x4 PCIe communication links.

For use with the Keysight U4301A or U4301B PCIe Gen3 analyzer.

Industry-unique ESP technology for accurate data capture

Keysight’s PCIe 3.0 analyzer uses Keysight’s unique ESP (Equalization Snoop Probe) technology, with the ability to tune the equalization algorithm used according to the type of channel the analyzer is monitoring. This ensures that the data captured in the analyzer is exactly what is on the wire. Without this capability, at 8 GT/s, there is a high likelihood of misrepresentation of the data on the bus, which can lead to wasted hours (if not days) in the validation cycle.