Unit installation

14-5

Installation

Place or mount the RBI-1 in close proximity to the Kenwood mobile radio to be used. Connect the

RBI-1 with the provided PG-4H Cable from the 8 pin modular jack marked "RADIO" to the

Kenwood Microphone jack. Only Port 1 (140/DUAL) will support a Dual Band radio. Port 1 is the

only Port the 140 Mhz radio can be connected to.

The RBI will support all 4 bands (140/220/440/1200) as follows:

If Port one is filled, Port 2 is for 220 only, Port 3 is for 440 only, Port 4 is for 1200 only. Basically,

if the selected band is unavailable on Port 1 it will go to the port assigned to that band.

Installation instructions are included with the RLC-ICM for connecting it to the IC-900/901

modules.

Building the RBI-1/RLC-ICM Cable

It is important to keep your interface cable as short as possible. The cable should never be more

than 6 feet in length; shorter is better.

RBI-1 Connector J2 RLC-3 Connections

Pin# - Line Name Pin# - Line Name

___________________________________________________________________________________________________________________________

Connections to serial port on the radio card (top DB-9)

3 - Data ..................... 2 - RLC-3 SPI data output

4 - Clock/Strobe ............... 3 - RLC-3 SPI clock output

9 - Ground ................... 5 - Ground - Required for noise suppression

Connections to the radio port (bottom DB-9)

5 - TX Audio (T Pot) ........... 4 - RLC-3 audio out

6 - RX Audio (R Pot) ........... 5 - RLC-3 audio in

7 - COS from RX ............. 7 - RLC-3 COR input (RBI-1 is active high, RLC-ICM is

low)

8 - PTT to TX ................ 3 - RLC-3 PTT output

9 - Ground ................... 1 - RLC-3 ground connection

2 - RLC-ICM (not RBI-1) PL

Detect Out ............... 2 - RLC-3 PL detect input (optional)

Connections to I/O Board (DB-25)

1 - RBI-1 (not RLC-ICM) Reset .. Open collector output on I/O board (optional)

2 - RBI-1 (not RLC-ICM)

"S" Meter output ........... Analog input on I/O board (optional)

In case it wasn't clear, there is only one connector on the RBI-1 or RLC-ICM that goes to the

RLC-3. It is connected to two different DB-9's on the RLC-3, both of which are on the same radio

port card. The bottom connector provides the audio, COR, PTT and (on the RLC-ICM the PL)