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Noise figure measurement personality

Question asked by rnarasingarao on Aug 5, 2010
Latest reply on Aug 9, 2010 by odanzy
If I purchase a spectrum analyzer Of Model:E4446A with option Noise figure personality(E4446A-219 Noise figure measurement personality  ).
Again i need to purchase any additional noise sorce,  or the system has it's own noise source? Please conform this.