Link Communications RLC-CLUB

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Step #3: Connecting Your Receivers to the RLC-Club

The radios connect to the RLC-Club using a male DB-9 connector (included). The pin-outs are

listed below.

Pin Number Description

1 Ground

2 PL Input (From your PL Decoder)

3 PTT Output (To the Transmitter)

4 Audio Output (To the Transmitter) 600

5 Audio Input (From the Receiver) 10K

6 Ground

7 COR (From your Receiver)

8 Ground

9 Ground

Connecting the Receiver COR

The first step in connecting your receiver is to locate an active receiver signal. If the voltage

goes from a voltage above 5 volts to ground when a signal is present, the signal is active low.

If the voltage goes from a ground to a voltage above 5 volts the signal is active high. The

signal must be able to sink 4mA to ground. The input impedance of the RLC-Club COR input

is 10K and it is diode clamped with internal pull-up resistors. This allows it to handle input

voltages of up to 40 volts without damage to the controller. The COR input must not go

below 0V (ground); this would damage radio port's COR/PL input . Using one of the

supplied DB-9 Male connectors, connect your COR signal to pin #7. The COR defaults to

active low. If the signal is not active low the user must change the controller's COR polarity

(see command 013). The front panel LED labeled RX will light when a correct activity signal

is received. If the LED lights at the wrong times, you probably have your COR or PL polarity

backwards. If the LED does not light at all, the RLC-Club is not detecting your COR/PL input

correctly. Use a volt meter to make sure that the signal from your receiver changes from

ground to above 5 volts (or vice versa) when the receiver goes active.

Connecting a PL Input (optional)

If you wish to use a PL (CTCSS) decoder on any of the receivers, its detect line can be

connected to pin #2 of the appropriate connector in the same fashion as the COR input. You

can select the PL polarity (see command 013). You will probably also want to use the audio

filter on the PL decoder board to filter the PL signal out of the receiver's audio before it goes to

the RLC-Club.

Link Communications RLC-CLUB - Page 23