The CSC-30-12.23G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 11700 to 12750 MHz, Coupling 30 dB, Coupling Variation ±1.2 dB, Frequency Sensitivity ±0.75 dB, Directivity 15 dB. Tags: Module with Connectors. More details for CSC-30-12.23G SQ can be seen below.