The CSC-5-1.54G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 1.525 to 1.559 MHz, Coupling 5 dB, Coupling Variation ±1 dB, Directivity 16 dB, Average Power 40 W. Tags: Module with Connectors. More details for CSC-5-1.54G SQ can be seen below.