Agilent/Keysight U9391G

The Keysight U9391G is a comb generator that generates frequency harmonics from an input RF signal to deliver precision phase calibration for non-linear measurements. Built on Keysight's InP MMIC technology, It has superior phase stability and excellent amplitude and phase flatness across a wide frequency range. The U9391G is optimized for use with the Keysight PNA-X nonlinear vector network analyzer (NVNA) and supports phase and delay measurements of frequency converters.

Technical Specifications

• Input frequency range: 10 MHz to 6 GHz


• Output frequency range: 10 MHz to 67 GHz


• Minimum tone spacing: 10 MHz


• Selectable divide ratios: 1, 2, 4, 8, or 16 Signal Quality


• Amplitude flatness: Excellent across frequency range


• Phase flatness: Excellent for precise calibration


• Phase stability: Superior, enabled by InP MMIC technology


• Lower sensitivity compared to competing comb generators, allowing single-point calibration across broad input power and frequency ranges

Key Features

• InP MMIC technology ensures superior phase and amplitude stability


• NIST-referenced phase calibration traceability


• Sine-to-square wave converter (U9391-60009) included as standard accessory for optimal performance with sine wave inputs below 100 MHz


• USB interface for plug-and-play operation with PNA-X, enabling frequency divider control and calibration data retrieval


• Trigger output available for synchronization with pulse repetition frequency


• Rugged connectors designed for high repeatability across multiple connections


• Handgrip included for improved handling and heat insulation


• Extended operating life

Typical Applications

• Precision phase calibration for non-linear network analysis


• Phase and delay measurements of frequency converters


• Wideband calibration of signal analyzers and oscilloscopes (with Keysight Signal Optimizer software K3101A)

Compatibility & Integration The U9391G integrates directly with the Keysight PNA-X NVNA via USB interface. It also supports phase and delay calibration of PNA and PNA-X network analyzers for frequency converter measurements.