The R&S FS-SNS90 from Rohde & Schwarz is a Noise Source with Frequency 60 to 90 GHz, Output Power 1 W, Excess Noise Ratio (ENR) 15 dB, Flatness ±0.78 dB (ENR Uncertainty), Temperature Coefficient 0.009 dB/Degree C. More details for R&S FS-SNS90 can be seen below.