Agilent/Keysight N4414A

The Agilent/Keysight N4414A is a 4-port S-parameter test set engineered for balanced measurements of devices that challenge conventional two-port characterization. It is the measurement front-end in balanced-measurement systems, delivering full four-port vector error correction for high-accuracy testing of differential filters, amplifiers, baluns, and balanced transmission lines. Operation requires control software - either the N4425A Balanced Measurement System or N1930A Physical Layer Test System - along with a compatible Keysight Vector Network Analyzer.

The test set processes both conventional (single-ended) and mixed-mode S-parameters, enabling re-normalization for non-50-ohm device characterization. Electronic calibration modules (such as the N4430A) provide fast, automatic calibrations with traceability to NIST standards through fully verifiable electronic calibration data stored in ECal module memory.

Technical Specifications

• Frequency range: 300 kHz to 6 GHz


• Port configuration: 4-port


• Reference impedance: 50 Ω


• Measurement modes: Single-ended and mixed-mode S-parameters


• Error correction: Full four-port vector error correction


• Data re-normalization: Non-50-ohm device support


• Time domain analysis: Available as option

Key Features

• Four-port vector error correction for high measurement accuracy


• User-defined display functions for parameter calculation and analysis


• Electronic calibration with NIST-traceable standards


• Factory calibration accuracy transferred directly to network analyzer


• Unique S-parameter data retained in ECal module memory for permanent error-term reference

Typical Applications

• Differential filter characterization


• Balanced amplifier measurement


• Balun performance testing


• Balanced transmission line analysis


• Mixed-mode S-parameter extraction

Compatibility & Integration

• Control: Keysight Vector Network Analyzers or host PC via software


• Software platforms: N4425A Balanced Measurement System; N1930A Physical Layer Test System


• System integration: Part of Keysight N44xxA Multiport Test Systems