The Keysight U9391G is a high-performance 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 provides 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
Frequency Performance
• 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.
