I.N. Vaulin Micran, Tomsk, Russiavaulin@micran.ru Al’manac of Modern Metrology № 3 (31) 2022, pages 119–129 Abstract. Manufacturers usually doesn’t revolve noise figure (NF) measurement range depen­dence upon gain (G) range for Y-factor method. There are derived the formulas for the theoretical estimation of the NF and the G measurement ranges powered by the noise figure … Continue reading The noise figure and the gain range estimation for Y-factor method