1MA178: The Y Factor Technique for Noise Figure Measurements

This application note describes in detail the steps required to make a noise figure measurement on a spectrum analyzer using the “Y Factor” technique. Background equations are presented for each step of the calculation. In addition, guidelines are provided to ensure a repeatable measurement. Measurement uncertainty is then reviewed, including contributions due to the noise source, analyzer, and the DUT itself. Finally, a software utility is presented that automates the noise figure calculation using four measurements from a spectrum analyzer. The utility checks the measurement guidelines and highlights potential problem areas. It then calculates the noise figure for the DUT along with the measurement uncertainty.

Name Type Language Version Date Size
1MA178_3e_NoiseFigure.pdf Application Note English 3e 13.03.2018 872 kB
1MA178_NF_Uncertainty_Calc_v322.exe Application Note File English 3.22 13.03.2018 280 kB
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