The R&S FS-SNS18 from Rohde & Schwarz is a Noise Source with Frequency 10 MHz to 18 GHz, Output Power 1 W, Excess Noise Ratio (ENR) 5 to 7 dB, Flatness ±0.10 to ±0.13 dB (ENR Uncertainty), Temperature Coefficient 0.009 dB/Degree C. Tags: Module with Connector. More details for R&S FS-SNS18 can be seen below.