The R&S FS-SNS40 from Rohde & Schwarz is a Noise Source with Frequency 100 MHz to 40 GHz, Output Power 1 W, Excess Noise Ratio (ENR) 10 to 17 dB, Flatness ±0.10 to ±0.21 dB (ENR Uncertainty), Temperature Coefficient 0.009 dB/Degree C. Tags: Module with Connector. More details for R&S FS-SNS40 can be seen below.