Unit installation

14-6

connections. The top (serial port) connector provides the control signals. This is not the main

serial port the the RLC-3 motherboard. If you are using the RBI-1, there may also be some

connections to one of the I/O boards.

Setup and Adjustment

You must install two jumper blocks on header J5 on the radio card that the interface cable is

plugged into or you will not be able to control the RBI-1 or RLC-ICM. Pins 1 and 2 should be

shorted together and pins 3 and 4 should be shorted together. These jumper blocks can be obtained

at most electronics supply stores.

The RBI-1 COR signal is active high. The RLC-ICM COR signal is active low. Set the COR

polarity switch on the radio card accordingly.

Audio receive level from the Kenwood to the Controller is controlled by VR2 (R). The audio level

from the Controller to the Kenwood is adjusted by VR1 (T). Refer to your manuals for additional

adjustments in your controller.

Capacitor C5 (10uF) Inside the RBI-1 Interface must be removed and replaced with a 1uF/25V

Tantalum Capacitor for the Audio to sound correct. Remove capacitors C16 and C17 to keep the

audio from sounding too 'Bassy'.