The Keysight N4002A is a smart noise source engineered for accurate noise figure measurements spanning 10 MHz to 26.5 GHz. This instrument delivers noise figure measurements up to 30 dB and integrates directly with Keysight’s NFA Series noise figure analyzers and X-Series signal analyzers to simplify measurement setups and reduce calibration overhead.
Technical Specifications
Frequency and Noise Performance
• Operating range: 10 MHz to 26.5 GHz
• Noise figure measurement capability: up to 30 dB
• Excess Noise Ratio (ENR): 15 dB nominal, 12 to 17 dB range
• Impedance: constant on/off state, minimizing DUT gain variations and measurement error
Calibration and Compensation
• ENR calibration data: electronically stored with automatic download to compatible analyzers
• Calibration data includes uncertainty and reflection coefficients
• Integrated temperature sensing for real-time measurement compensation
Connectors
• Standard: APC 3.5 male
• Optional: Type-N male (Option 001)
Physical
• Weight: 0.7 kg
– Key Features
• Electronic storage of ENR calibration data eliminates manual entry and reduces setup time
• Automatic calibration download to compatible instruments improves measurement repeatability
• Constant impedance design maintains DUT operating point during on/off transitions
• Temperature-compensated operation extends measurement accuracy across environmental variations
– Typical Applications
• Low-noise amplifier (LNA) characterization
• Receiver front-end noise figure verification
• Component noise performance assessment
• Broadband noise figure testing from microwave through millimeter-wave frequencies
– Compatibility & Integration
• Keysight NFA Series Noise Figure Analyzers
• Keysight X-Series Signal Analyzers (PXA, MXA, EXA, CXA models)
• Keysight ESA-E Series Spectrum Analyzers with noise figure personality
