PMI Model No.: HBDFM-218-BD-DP, is a High Band Direction Finding Module from 2.0-18.0 GHz, Uni-Directional, Multi-Function Device that routes the signal present at the RF Input Connector through one of its four channels to the RF Output Connector, to amplitude modulate the input signal. The input and output ports can be switched to internal 50 Ohm terminations to ensure matched source and load impedance for interfacing devices during off-times and Isolation or VSWR tests.