Choose a country or area to see content specific to your location
What are you looking for?
Bridging design and physical testing to evaluate drop, impact, shock, and vibration compliance before hardware exists.
Unlock your free upgrade to the next bandwidth tier.
Strengthen 1.6T network reliability for AI-scale workloads from transceivers to interconnects.
With extra memory and storage, these enhanced NPBs run Keysight's AI security and performance monitoring software and AI stack.
Explore end-to-end workflows spanning IC design, validation, wafer test, and photonics.
Explore curated support plans, prioritized to keep you innovating at speed.
Achieve 200+ Gbaud multi-level modulated signals with high-speed AWGs for digital and optical standards.
Explore dual-channel and ultra-wideband signal analysis for demanding RF workflows.
Get faster, clearer insights with our new multicore, 12-bit oscilloscope up to 33 GHz. Trade in your old oscilloscope and get credit toward a new XR8.
Authoritative application notes, data sheets, reference designs, and test procedures to accelerate design and validation decisions.
Hands‑on bootcamps that teach system design, test methods, and production workflows engineers can apply immediately.
Success Stories
Quick access to support related self-help tasks.
Additional content to support your product needs.
Explore services to accelerate every step of your innovation journey.
Keysight BERTs are offered in one capability class, XE8, which includes M8000 Series BERTs.
The M8040A high performance BERT covers all flavors of 400 GbE standards testing with support for PAM4 and NRZ signals and data rates up to 64 GBaud.
Module type
Pattern Generator, Error Analyzer
Number of channels
1 to 2
Supported data rates
64 Gbaud
Line coding
NRZ, PAM3, PAM4
Find out what's included and explore available upgrade options from Keysight.
The M8040A high-performance BERT provides clean NRZ and PAM4 signals up to 64 GBaud with fast transitions and low intrinsic jitter. The remote head concept of M8040A with the short 1.85 mm cables brings the performance close to the device under test, minimizing signal degradations caused by lossy channels.
The M8040A is designed for research and development engineers and test engineers who characterize chips, devices, transceiver modules and sub-components, boards, and systems with serial I/O ports operating with data rates up to 32 GBaud and 64 GBaud in the server, computing, data center, and communications industry.
The M8040A can be used for receiver (input) testing for many popular interconnect standards that use PAM4 and NRZ data formats such as: PCIe 6.0 / 5.0 / 4.0, TBT3, 400 GbE, 50 / 100 / 200 / 400 / 800 GbE, OIF CEI-56G, and CEI-112G, 64G/112G Fibre Channel, Infiniband-HDR, and proprietary interfaces for chip-to-chip, chip-to-module, backplanes, repeaters, and active optical cables.
The pattern generator of the M8040A GBaud BERT provides a clean 32 and 26.5625 GBaud PAM4 output signal.
Innovate at speed with curated support plans and prioritized response and turn-around times.
Get predictable, lease-based subscriptions and full lifecycle management solutions—so you reach your business goals faster.
Experience elevated service as a KeysightCare subscriber to get committed technical response and more.
Ensure your test system performs to specification and meets local and global standards.
Make measurements quickly with in-house, instructor-led training, and eLearning.
Download Keysight software or update your software to the newest version.