-
High-Performance BERTs
High-speed receiver characterization for error-free data transmission
.png)
-
Modular Digitizers
Save rack space with high-speed signal acquisition in PXI and AXI form factors
-
Modular DAQs
Explore our switch measure mainframes and modules for design verification and automated testing
-
Modular BERTs
Explore modular BERTs with customizable components for tailored high-speed digital interface testing
.png)
High-Performance BERTs
Keysight BERTs are now offered in one capability class, the XE8-class, and include the M8000 Series BERTs. These BERTs are designed for high-speed digital interface testing, enabling you to accurately characterize, validate, and stress test digital receivers. BERTs are modular instruments consisting of a pattern generator, an error detector or analyzer, and a clock data recovery module. Used across a wide range of applications — including data center interconnects, optical transceivers, high-speed memory interfaces, and next-generation serial buses — Keysight BERTs support critical standards including PCIe®, DDR, USB, and Ethernet (100G / 400G / 800G / 1.6T). Choose from one of our most popular BERT configurations based on supported data rates and line coding or configure one specific to your application needs
Modular Digitizers
Keysight modular digitizers are high-performance signal acquisition instruments designed for fast, precise waveform capture in automated test and measurement systems. Built on PXIe and AXIe, they offer fast sampling rates and wide bandwidths in a compact form factor making them ideal for complex test environments in aerospace and defense, communications, and semiconductor testing.
Modular DAQs
Keysight data acquisition (DAQ) systems are designed to accurately capture and digitize electrical and physical signals such as voltage, current, temperature, and pressure from real-world environments. Used across industries like aerospace, automotive, energy, and electronics manufacturing, these systems support a wide range of applications, including sensor validation, environmental monitoring, and functional testing. Their modular design and channel scalability make them adaptable to everything from small benchtop setups to large-scale automated test systems. With high accuracy, reliability, and easy integration, Keysight DAQs ensure performance, quality, and efficiency in both R&D and production testing.
With over 30 plug-in modules—including low-frequency, RF, and microwave switching up to 26.5 GHz, digital I/O, and D/A converters—and a choice of 3- or 8-slot chassis, you can configure the modular DAQ that best fits your application.
Modular BERTs
Keysight modular bit error ratio testers (BERTs) consist of the individual, interchangeable components which make up the high-performance BERT solutions for testing high-speed digital interfaces. These instruments include individual pattern generators, error detectors, analyzers, and clock data recovery modules to support evolving test needs. You can build your own BERT configuration based on data rate, modulation format, and functional needs, customizing a setup to meet your specific application requirements.
Find the BERT for your application in minutes
Explore compatible software and accessories
Choose from a wide variety of BERT, digitizer, and DAQ software and accessories designed to streamline configuration, automate measurements, and ensure compliance to industry standards. Pair your software with the cables, kits, and extender boards needed to make the right measurement for your application.
Explore use cases
BERTs, digitizers, and DAQs support a wide range of measurements, discover them all
Wired Communication
How to Analyze PAM4 Receiver Signals
Characterize PAM4 with BER and SER measurements.
Wired Communication
Use a bit error ratio tester to perform 100 Gb/s per lane receiver calibration and conformance testing.
Wired Communication
Calibrate and test PCIe 6.0 DUTs for receiver compliance with high-bandwidth oscilloscopes, BERTs, and automation software.
Wired Communication
Validate DDR5 receiver conformance to JEDEC standards using test automation.
Wired Communication
Make multichannel current measurements during the product design stage using a DAQ system.
Services and support
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.
Frequently asked questions
A Bit Error Ratio Tester (BERT), digitizer, and data acquisition (DAQ) system serve distinct measurement roles.
- A BERT (Bit Error Ratio Tester) is purpose‑built to validate high‑speed digital links by transmitting known bit patterns and measuring bit error rate, jitter tolerance, and link margin. It is essential for testing serial standards, optical links, and high-speed interconnects where signal integrity and compliance are critical.
- A digitizer, in contrast, captures high‑bandwidth analog waveforms with precise timing for offline or real‑time analysis, making them ideal for signal integrity analysis, radar, and scientific research.
- A digital acquisition system (DAQ) focuses on synchronized, multi‑channel measurement and logging of electrical or physical parameters over time, prioritizing channel density and stability rather than high bandwidth signals.
The most important specifications depend on whether the measurement focuses on bit errors, waveform fidelity, or long‑term signal capture.
- BERT selection prioritizes supported data rates, jitter tolerance, error detection capability, and pattern generation.
- Digitizers are defined by analog bandwidth, sampling rate, vertical resolution, and timing accuracy.
- DAQ systems emphasize channel count, synchronization, resolution, and sustained data throughput rather than extreme bandwidth.
In contrast to general‑purpose instruments, these specifications directly determine whether a system can accurately capture, stress, or validate signals in high‑speed, mixed‑signal, or long‑duration measurement environments.
BERTs are best suited for validating the reliability and margin of high‑speed serial communication links. Typical use cases include receiver compliance testing for electrical and optical standards, characterization of interconnects and backplanes, and stress testing of transceivers under jitter, noise, and attenuation.
Unlike oscilloscopes or digitizers, BERTs directly quantify link performance through bit error rate measurements, making them essential for evaluating long‑run stability, forward error correction efficiency, and system robustness in data center, networking, and high‑speed computing applications.
Digitizers and DAQs integrate into automated test systems through software‑controlled triggering, synchronization, and data streaming.
Digitizers are commonly used where high‑bandwidth waveform capture must be correlated with other instruments for signal integrity or time‑domain analysis.
DAQs, in contrast, excel in automated validation and manufacturing workflows that require synchronized measurements across many channels over extended durations.
Both instrument types support scalable test architectures by enabling repeatable measurements, centralized data processing, and integration with test automation frameworks used in R&D and production environments.
Measurement accuracy depends on calibration, signal path control, and synchronization across instruments. Engineers ensure reliable results by using traceable calibration, appropriate bandwidth selection, and high‑quality cabling to minimize attenuation and reflections. For high‑speed measurements, timing alignment, clock stability, and jitter management are critical to preserving signal integrity. Regular verification routines and automated correction for gain, offset, and timing errors help maintain consistency across test setups.