The Keysight U9391M Comb Generator is a precision phase reference standard operating from 10 MHz to 110 GHz, engineered for frequency metrology and calibration of microwave and millimeter-wave components and systems. It delivers NIST-referenced phase calibration for non-linear measurements in conjunction with the Keysight PNA-X nonlinear vector network analyzer, offering excellent phase and amplitude flatness across its output range.
The instrument accepts input signals from 10 MHz to 6 GHz and provides user-selectable frequency divider ratios of 1, 2, 4, 8, 16, 32, 64, or 128, with a minimum tone spacing of 10 MHz. Its architecture exhibits low sensitivity to input power and fundamental frequency variations, enabling single-condition calibration to extend across a wide range of input powers and operating frequencies. Embedded calibration data is stored onboard and retrieved via USB interface for rapid access.
Technical Specifications
• Output Frequency Range: 10 MHz to 110 GHz
• Input Frequency Range: 10 MHz to 6 GHz
• Frequency Divider Ratios: 1, 2, 4, 8, 16, 32, 64, 128 (user-selectable)
• Minimum Tone Spacing: 10 MHz
• Phase Reference: NIST-referenced calibration with precision phase and amplitude flatness
• Operating Temperature: 0 to 40 °C
• Storage Temperature: −40 to 70 °C
• Power: USB 3.0 connection (control, data, and power delivery)
– Key Features
• Low input power and frequency sensitivity for broad calibration applicability
• Rugged connectors with high repeatability across multiple connects and disconnects
• USB 3.0 plug-and-play integration with PNA-X NVNA systems
• Fast embedded calibration data retrieval via USB interface
• Extended operating life design
– Typical Applications
• Frequency metrology
• Calibration of microwave and millimeter-wave components and systems
• Non-linear device characterization and phase calibration
– Compatibility & Integration
The U9391M is specifically designed for the Keysight PNA-X nonlinear vector network analyzer. Optimal performance requires compatible PNA-X firmware revisions. The instrument is compatible with broadband mmWave (M4) solutions but not with banded configurations.
