The CSM-30-1.64G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 1.626 to 1.66 GHz, Frequency Sensitivity ±0.2 dB, Coupling 30 dB, Coupling Variation ±0.5 dB, Power 1 W. Tags: Module with Connectors. More details for CSM-30-1.64G SQ can be seen below.