Agilent/Keysight U1880A

The Keysight U1880A is a USB-powered deskew fixture that eliminates time-delay misalignment between voltage and current probes - a critical requirement for accurate instantaneous power measurements. By applying identical pulse signals to both probe channels, the fixture equalizes their propagation delays and establishes precise phase relationships. This probe deskewing capability is essential when performing switching loss, safe operating area (SOA), and dynamic on-resistance measurements on power devices and circuits.

Technical Specifications

The U1880A operates as a passive deskewing instrument powered directly from a USB port on compatible oscilloscopes or personal computers. Deskew calibration can be performed manually via oscilloscope controls or automated through dedicated power measurement software. The fixture weighs 0.5 kg and is rated for indoor use only.

Key Features

• USB-powered operation - no external power supply required


• Direct oscilloscope integration via front-panel USB connectivity


• Manual deskew adjustment or software-assisted calibration


• Supports both current probes and differential active probes


• Compatible with wide range of probe specifications (2 MHz to 100 MHz bandwidth, 15 A to 500 A current ratings)

Typical Applications The U1880A is deployed in power electronics characterization, particularly for applications requiring phase-accurate voltage and current measurements. Engineers rely on this fixture when quantifying instantaneous power dissipation, evaluating device switching losses, mapping safe operating area boundaries, and measuring dynamic on-resistance under transient conditions.

Compatibility & Integration The fixture integrates with InfiniiVision 3000T, 4000X, 6000X, 5000, 6000, and 7000 Series oscilloscopes, as well as Infiniium S, 8000, and 9000 Series instruments. Automated deskew workflows require the U1881A Power Measurement application (InfiniiVision 5000/6000/7000 Series), the U1882A application (Infiniium 8000/9000 Series), or the U1882B application (Infiniium platforms). Current probes such as the 1147A, N2774A, N2782A, N2783A, N2780A, and N2781A are fully compatible with the deskewing process.