N5221BU-679 - Keysight Technologies Inc. Add 4-port operation to option 219..

Keysight Technologies Inc. Add 4-port operation to option 219 analyzer, version 7 synthesizer

The Keysight N5221BU-679 is a factory upgrade kit that enables 4-port operation on a PNA Series network analyzer configured with option 219 and version 7 synthesizer. This upgrade allows users to expand their measurement capabilities from a 2-port to a 4-port configuration, supporting advanced multi-port S-parameter measurements and mixed-mode analysis. The upgrade is designed for seamless integration with existing hardware, maintaining the analyzers high performance and measurement accuracy. It is intended for users who require enhanced test flexibility for complex RF and microwave devices.