Keysight N8975A Noise Figure Analyzer 10 MHz-26.5 GHz One Box Solution APC 3.5 mm Product Overview The Keysight (Agilent) N8975A is a high-performance noise figure analyzer designed for fast, accurate and repeatable noise figure (NF) measurement from 10 MHz to 26.5 GHz in a one-box solution. It offers simultaneous noise figure and gain measurements with the ability to view, print and save data in multiple formats, and can characterize amplifiers and frequency-translating