The CSC-30-3.7G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 3.2 to 4.2 GHz, Frequency Sensitivity ±0.3 dB, Coupling 30 dB, Coupling Variation ±1 dB, Power 100 W. Tags: Module with Connectors. More details for CSC-30-3.7G SQ can be seen below.