The Keysight U2531A is a USB modular data acquisition device that combines simultaneous analog sampling with digital I/O and counter capabilities. Operating as a standalone instrument or integrated within the U2781A chassis, it delivers synchronized multi-channel acquisition via USB 2.0 USBTMC-USB488 connectivity. The U2531A functions as a digital multimeter, oscilloscope, or general-purpose DAQ system, supporting polling, continuous, and burst acquisition modes across Windows environments.
Technical Specifications
Analog Inputs: 4 simultaneous sampling channels at 2 MSa/s per channel, 14-bit resolution. Bipolar input ranges include ±10 V, ±5 V, and ±2.5 V full-scale.
Analog Outputs: 2 channels at 1 MSa/s update rate, 12-bit resolution. Supports both predefined and arbitrary waveform generation.
Digital I/O: 24-bit programmable TTL input/output channels.
Digital Counters: 2 general-purpose counter channels.
Triggering: Simple triggering capabilities for acquisition control.
Connectivity: USB 2.0 with USBTMC-USB488 standard compliance.
– Key Features
• Four simultaneous analog input channels eliminate timing skew across measurement points
• 14-bit analog input resolution and 2 MSa/s per-channel sampling rate support waveform capture and transient analysis
• Dual analog outputs with 1 MSa/s update rate enable stimulus generation and real-time feedback control
• 24-bit digital I/O provides flexible logic-level interfacing and timing synchronization
• Multiple acquisition modes (polling, continuous, burst) adapt to DMM, oscilloscope, and data logging workflows
• Optional U2781A chassis integration enables multi-module synchronization and expanded channel density
– Typical Applications
• Transient waveform capture and signal characterization
• Multi-channel environmental and sensor monitoring
• Automated test systems requiring synchronized stimulus-response measurement
• Educational laboratory setups combining measurement and signal generation
• Real-time data acquisition with TTL synchronization signals
– Compatibility & Integration
Supported development environments include Keysight VEE, MATLAB® R2007a, NI LabVIEW, and Microsoft® Visual Studio®. Keysight Measurement Manager software streamlines configuration and measurement workflows. Optional U2901A or U2902A terminal block adapters simplify field wiring. Runs on Microsoft® Windows® operating systems.
