| Searching for the FS-K3 noise/gain software |
| The question was a long time ago, but maybe you're still interested: http://www.ebay.pl/itm/Rohde-Schwarz-1057-3086-02-FS-K3-Noise-Figure-Gain-option-for-FSIQ-/351368799294?pt=LH_DefaultDomain_0&hash=item51cf36643e |