Keysight (Agilent) N8973A Noise Figure Analyzer 10 MHz to 3 GHz

The Keysight (Agilent) N8973A Noise Figure Analyzer delivers noise characterization from 10 MHz to 3 GHz. This instrument performs simultaneous noise figure and gain measurements on amplifiers and frequency translating devices with measurement speeds under 50 ms per measurement at 8 averages. Its intuitive interface, color graphical display with limit lines and marker functions, and low instrument uncertainty enable fast, repeatable characterization across RF and microwave components.

Technical Specifications

Frequency Range: 10 MHz to 3.0 GHz Measurement Bandwidth: User-selectable across six options - 4 MHz, 2 MHz, 1 MHz, 400 kHz, 200 kHz, and 100 kHz Measurement Speed: Nominally <50 ms per measurement with 8 averages; <100 ms per measurement with 64 averages Power Requirements: 195 to 250 V rms, 47 to 66 Hz; power consumption <300 W; standby <5 W Connectors: N-type (m)

Key Features

• Simultaneous noise figure and gain measurements displayed in color graphical format


• Frequency list mode for targeted measurements and throughput optimization


• Automatic ENR calibration data upload from SNS Series noise sources


• Enhanced data analysis via limit lines and marker functions


• Internal storage for up to 30 state, trace, and setup files


• Local oscillator control via dedicated second GPIB interface


• VGA output for external display connectivity


• PC and printer integration with multi-format data export

Typical Applications Amplifier characterization, transceiver evaluation, frequency translating device analysis, and component qualification across UHF through microwave bands.

Compatibility & Integration Fully compatible with SNS Series noise sources (N4000A, N4001A, N4002A) and legacy Agilent 346/347 noise sources. Dual GPIB interfaces enable independent instrument control and local oscillator management for automated test sequences and system integration.