JRC JRL-2000F Manual page 10

Before connecting the JRL-2000F to an exciter, turn off the power of each radio device and
unplug all power cords from the outlets.
Different methods of connection are used for different types of exciters. Interfacing the exciter
to the JRL-2000F is accomplished by connecting various types of signal lines to the control
connector as well as connecting the coaxial cable and grounding cdble.