Clear-Com TW-47 - Manual (Page 13)

T W - 4 7 T W O - W A Y R A D I O I N T E R F A C E 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
1
2
3
4
5
6
7
8
9
From walkie-talkie
earphone
To walkie-talkie
microphone input
Shield
Tip
Tip
Shield
Example 1: Relay shunting the microphone
Jumper settings
J6 Off
J7 Off
J8 On (Medium gain mic input)