Noise Figure and Phase Noise Analyzers Catalog

The Keysight Noise Figure Analyzers Catalog provides a comprehensive overview of instruments designed for low noise amplifier testing, receiver sensitivity evaluation, and accurate noise figure and gain measurements across RF and microwave systems. Organized into benchtop analyzers and modular noise figure measurement solutions, the catalog covers capability classes that support a wide range of frequencies, measurement methods, and modular configurations to improve accuracy and repeatability. It includes instruments for high‑performance laboratory characterization, compact form factor analyzers for production lines, and modular PXIe systems for automated test environments. These solutions support applications across wireless communications, radar receivers, satellite systems, RF component design, and low noise system optimization.
 

Explore the noise figure and phase noise analyzer classes:

• Noise figure analyzers come in the NF7‑class, which includes the N8973B, N8974B, N8975B, and N8976B. These instruments are designed for fast, accurate, and repeatable noise figure and gain measurements across 3.6 GHz to 40 GHz. They feature low instrument uncertainty (±0.02 dB), automated Y‑factor calibration, and multimode operation including spectrum and IQ analysis. Integrated ENR data loading with Keysight SNS noise sources simplifies calibration, while built‑in uncertainty calculations help engineers quantify noise contributions across RF and microwave receiver chains. NF7 analyzers provide stable, touch‑enabled operation for R&D, component characterization, and production test workflows.
  
  
• Phase noise analyzers come in two classes, the PN3‑ and PN7‑class, which includes the E5045A–E5047A, E5055A–E5058A, and N5511A. They support measurement frequencies from 7 GHz to 54 GHz and offset frequencies up to >8 GHz. They provide high‑sensitivity absolute and residual phase noise measurements using advanced dual‑channel cross‑correlation to suppress internal noise, enabling accurate characterization of low‑level phase noise and spurious signals. These analyzers support AM noise, baseband noise, and pulsed‑RF measurements, with the PN7-class achieving noise floors down to the kT thermal noise limit (–177 dBm/Hz) for ultra‑sensitive oscillators, synthesizer, and clock evaluation. They deliver precise spectral purity analysis for radar, high‑performance communications, LO design, and metrology‑grade phase noise characterization
   

Modular noise figure measurement solutions support scalable, automated test configurations.
Modular architectures allow multi‑channel measurements, fast throughput, and integration with PXIe chassis for compact automated test systems. These modular solutions enhance test speed and repeatability in high‑volume manufacturing and support synchronized multi‑instrument setups for characterizing multi‑port or multi‑band devices under test. Their flexibility helps accommodate evolving frequency ranges, additional test parameters, or expanded automation workflows without requiring complete system redesign.
 

Noise figure analysis techniques enable accurate characterization of low noise devices.
Keysight NF analyzers integrate hardware and software methods such as Y‑factor measurements, calibrated noise sources, uncertainty reduction techniques, and gain/noise tracking to ensure reliable characterization of receiver chains. These tools help engineers analyze sources of noise, quantify system noise temperature, and evaluate degradation across frequency, bias conditions, or device architectures.
 

Software and accessories expand noise figure measurement capabilities across all analyzer types.
Keysight noise figure software enables instrument control, real‑time data capture, uncertainty analysis, calibration workflow management, and graphical visualization of noise figure, gain, and system noise temperature. Accessories include calibrated noise sources, impedance adapters, mixers, filters, and cabling options to build complete test chains. These hardware and software tools help ensure measurement accuracy across RF, microwave, and millimeter‑wave applications.
 

Keysight Support Services ensure reliability, accuracy, and long‑term performance.
KeysightCare support plans provide prioritized technical assistance, calibration support, fast response times, and expert troubleshooting to maintain measurement accuracy and minimize downtime. High‑performance instruments include one year of KeysightCare Assured, ensuring confidence in noise performance and continuous readiness for demanding RF and microwave test workflows.
 

Overall, the Noise Figure Analyzers Catalog serves as a guide to selecting the right analyzer for your application. With modular options, advanced analysis software, and comprehensive support services, Keysight noise figure analyzers empower engineers working in wireless communications, radar development, aerospace systems, and high‑performance RF receiver design.