The CHPsc74F-30F-30R from Narda-ATM is a Dual Directional Coupler with Coupling 30 dB, Frequency 2 to 8 GHz, Average Power 900 W, Insertion Loss 0.15 to 0.2 dB, Directivity 19 dB. Tags: Module with Connectors. More details for CHPsc74F-30F-30R can be seen below.