The CHPsc23L-50 from Narda-ATM is a Directional Coupler with Frequency 860 MHz to 1.7 GHz, Coupling 50 dB, Frequency Sensitivity 0.8 dB, Directivity 23 dB, Average Power 900 W. Tags: Module with Connectors. More details for CHPsc23L-50 can be seen below.