Clear-Com Cellcom Instruction Manual download pdf (Page 13)

TW-47 TWO-WAY RADIO INTERFACE

1-5

3. The most difficult setting is getting your particular radio

to key properly. Every radio has a different method of

externally keying its transmitter. To determine how to set

the jumpers and wire the connector, you need to know

what type of external microphone is used in your radio,

or you need to experiment. Below are three examples of

how to key the transmitter. If you are unsure of which

wiring to use, try all three one at a time. Pins 2, 3, 4 and

7 are the relay contacts in the TW-47. If your radio

model is not listed in “Wiring Cables for Specific Radio

Types” and you have tried all three examples, and you

still can’t make the base station walkie-talkie work

properly, call customer service and we will help you get

the system working.

Figure 1-3: Relay shunting the microphone

From walkie-talkie

earphone

To walkie-talkie

microphone input

Shield

Tip

Shield

Example 1: Relay shunting the microphone

Jumper settings

J6 Off

J7 Off

J8 On (Medium gain mic input)

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Clear-Com Cellcom Instruction Manual Page 13