The Trompeter HDVDPT is a Self Terminating HDTV-Ready High Frequency 75 Ohm WECoPatch Jack. Normal-Thru, Dual Coaxial. Inserting a plug into the source side automatically terminates the load side. Insertion into the load side automatically terminates the source side. Either provides a resistive load to the unused side. 1.375" mount hole spacing. Meets or exceeds the requirements of the following:SMPTE 292: S1, 1 < 15db from 5MHz to 1.485GHzSMPTE 424: S1, 1 < 15dB from 5MHz to 1.485 GHz,S1, 1 <10dB from 1,485GHz to 3GHz