The Keysight U9391C Comb Generator produces a precise spectrum of harmonically related frequencies spanning 10 MHz to 26.5 GHz, enabling high-accuracy phase calibration and non-linear measurements in RF and microwave applications. Built on Keysight’s InP MMIC technology, it delivers superior phase stability for repeatable results in demanding test environments. The instrument generates output tones with -80 dBm minimum power per picket at 10 MHz input pulse repetition frequency. It accepts input signals from 10 MHz to 6 GHz with selectable divide ratios of 1, 2, 4, 8, or 16, and minimum tone spacing of 10 MHz.
Technical Specifications
• Frequency Range: 10 MHz to 26.5 GHz output; 10 MHz to 6 GHz input
• Output Power: -80 dBm minimum per picket (10 MHz input PRF)
• Input Power Range: -15 dBm to 15 dBm
• Divide Ratio: Selectable 1, 2, 4, 8, or 16
• Minimum Tone Spacing: 10 MHz
• Amplitude Flatness: Less than 12 dB at 10 MHz input PRF
• Phase Flatness: ±8.5° (10 MHz–3 GHz), ±6.5° (3–20 GHz), ±8.5° (20–26.5 GHz)
• Pulse Width: Less than 23 ps
• Input Return Loss (S11): Greater than 10 dB (10 MHz–6 GHz)
• Power Supply: 15 V DC ±10% or ±20%
• Current Draw: 300 mA nominal
• Operating Temperature: 0 to 40°C
• Storage Temperature: -40 to 70°C
• Weight: 0.370 kg
– Key Features
• NIST-traceable phase calibration for precision measurements
• USB interface for plug-and-play operation
• Trigger output for synchronization with pulse repetition frequency
• Standard 3.5 mm female connectors
• InP MMIC technology foundation
– Compatibility & Integration
The U9391C integrates with Keysight’s PNA-X nonlinear vector network analyzer (NVNA) series, including the N5242A (26 GHz), N5245A (50 GHz), and N5247A (67 GHz) models. It calibrates phase and delay measurements of frequency converters across the PNA and PNA-X analyzer families.
