The CSC-30-1.38G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 1164 to 1591 MHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.15 dB, Directivity 16 dB. Tags: Module with Connectors. More details for CSC-30-1.38G SQ can be seen below.