Agilent/Keysight 346CK40

The Keysight 346CK40 is a broadband coaxial noise source engineered for precision noise figure measurements across RF and microwave frequencies. Operating from 1 GHz to 40 GHz with usable extension to 50 GHz, it delivers controlled noise performance with calibration data across the entire frequency band at 1 GHz intervals. The unit combines low VSWR design with a 6 dB output attenuator to minimize measurement uncertainty and signal reflections, making it ideal for metrology labs, research facilities, and high-frequency manufacturing environments requiring stringent calibration accuracy.

– Technical Specifications

• Frequency Range: 1 GHz to 40 GHz operating; usable to 50 GHz
• Excess Noise Ratio (ENR): Typically 14 dB at 1 GHz, decreasing to approximately 5 dB at 40 GHz; nominal 3 dB to 7 dB between 37–40 GHz; nominal −0.5 dB at 50 GHz
• Output Attenuator: 6 dB included on output connector
• RF Output Connector: 2.4 mm (m)
• Input Bias Connector: BNC (f)
• Reflection Coefficient Match: Differential between ‘on’ and ‘off’ states no greater than 0.01 (typical specification)
• Operating Temperature Range: −10°C to 50°C
• Power Supply: 110–240 VAC, 50/60 Hz
• Calibration Data: Provided on USB flash device and printed documentation from 1 GHz to 50 GHz at 1 GHz steps

– Key Features

• Low VSWR minimizes reflections and reduces measurement uncertainty
• Improved source impedance matching compared to baseline models
• Broadband operation eliminates need for multiple noise sources across frequency bands
• Compact, lightweight design for portability
• 6 dB output attenuator for controlled noise injection

– Typical Applications

• Noise figure calibration and verification
• RF and microwave test equipment calibration
• High-frequency metrology measurements
• Advanced research and development

– Compatibility & Integration

The 346CK40 is engineered as a companion instrument to Keysight noise figure measurement solutions for applications spanning DC to millimeter-wave frequencies.