The PRO-DIR 500-1000-3 dB-N from Amphenol Procom is a Directional Coupler with Frequency 500 MHz to 1 GHz, Coupling 3 dB, Coupling Variation ±1 dB, Power 100 W, Average Power 100 W. Tags: Module with Connectors. More details for PRO-DIR 500-1000-3 dB-N can be seen below.