The CSC-30-1.65G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 1600 to 1700 MHz, Coupling 30 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.75 dB, Directivity 18 dB. Tags: Module with Connectors. More details for CSC-30-1.65G SQ can be seen below.