Agilent/Keysight U5481B

The Keysight U5481B is an infrared-to-USB connectivity cable that bridges handheld test instruments to personal computers for real-time data acquisition and instrument control. This adapter enables measurement data transfer from Keysight's U1700 Series Capacitor and LCR Meters and the U1401A Multifunction Calibrator/Meter, supporting data logging and remote control workflows without replacing the instrument itself.

Technical Specifications

• Interface: Infrared (IR) to USB


• Baud Rate: 19,200 bits per second maximum


• Cable Length: 1.5 meters


• Operating Temperature Range: 0 to 50°C


• Power Supply Voltage: 3.3 V to 5 V (instrument-supplied)


• Operating System Support: Windows 8

Key Features

• Direct IR-to-USB conversion eliminates the need for legacy serial interfaces


• 1.5 meter cable length provides flexible instrument-to-computer spacing


• Fast data transfer at 19,200 bps supports efficient logging of measurement sequences


• Low-voltage operation compatible with battery-powered handheld meters


• Replaces the U5481A model with improved USB compatibility

Typical Applications

• Automated capacitance and inductance measurement data collection


• Calibration tracking and compliance documentation


• Real-time LCR parameter monitoring during production testing


• Remote meter configuration and control from the test station PC

Compatibility & Integration The U5481B integrates with the following Keysight instruments:

U1700 Series Handheld Capacitor Meters

U1700 Series Handheld LCR Meters

U1401A Handheld Multifunction Calibrator/Meter Keysight supplies drivers, firmware, and software through its technical support resources. A datasheet and additional documentation are available to support integration planning.