Keysight Technologies Inc. ECal module 13.5 GHz 4-port
The Keysight N4431D is a 4-port Electronic Calibration (ECal) module designed for use with Keysight vector network analyzers. It covers a frequency range from 300 kHz to 13.5 GHz and enables fast, accurate, and repeatable calibration of multiport test setups. The N4431D automates the calibration process, reducing operator errors and setup time compared to traditional mechanical calibration kits. It is USB-controlled and supports both single-ended and mixed-mode S-parameter measurements, making it ideal for characterizing multiport devices such as differential components and networks. The module is compatible with a wide range of Keysight network analyzers and is designed for high reliability and ease of use in demanding RF and microwave test environments.