The CHPsc22L-40 from Narda-ATM is a Directional Coupler with Frequency 800 MHz to 4.2 GHz, Coupling 40 dB, Frequency Sensitivity 1.3 dB, Directivity 20 dB, Average Power 900 W. Tags: Module with Connectors. More details for CHPsc22L-40 can be seen below.