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Is it possible to improve the system noise figure and reduce the measurement uncertainty of the Keysight N897xA Series Noise Figure Analyzers when characterizing low gain, low noise figure test devices?

Noise figure analyzer uncertainty can be significantly improved via the use of a pre-amplifier before the measurement system. The pre-amplifier should have substantial gain combined with a low noise figure. The fundamental goal of the pre-amplifier is a reduction in the overall "system" noise figure.

Documents & Downloads

Noise Figure Uncertainty Calculator 
The noise figure uncertainty calculator has been created to aid your design work, from components through to systems, helping you meet the continued demand for higher system performance.

Analysis Tool 2015-05-29

Fundamentals of RF and Microwave Noise Figure Measurements - Application Note 
This 32-page, black-and-white application note providesinformation on RF and Microwave noise figure measurementts. Topics include noise figure and temperature, noise characteristics of two-port networks, and the measurement of noise figure.

Application Note 2017-09-06

Noise Figure Measurement Accuracy - The Y-Factor Method - Application Note 
Specific to instruments that use the Y-factor method for noise figure measurements, this app note discusses measurement basics, avoidable errors, loss and temperature corrections, and uncertainties.

Application Note 2020-03-02

Non-Zero Noise Figure After Calibration (AN 1484) 
This Application Note attempts to explain the reasons behind the zero-error and shows with examples that it does not have a compromising effect on instrument accuracy in a measurement situation.

Application Note 2004-01-20

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