Clear-com TW-47 User Manual download pdf (Page 17)

TW-47 TWO-WAY RADIO INTERFACE

1-9

TRANSMIT KEY JUMPER

For some walkie-talkies or two-way radios, a dedicated power

path may be needed to activate their transmit function. If so, set

jumper J6 to ON.

CALL SIGNAL FREQUENCY ADJUST

The 20 KHz call signal detector is calibrated at the factory and

should not require further adjustment. If it becomes necessary to

correct the frequency adjustment for any reason, this can be done

by adjusting the internal potentiometer. Refer to Figure 1-6 for

location of the potentiometer.

The adjustment is performed by measuring the frequency at TP1

and adjusting the pot until the frequency is 20 KHz. If the

adjustment must be performed without instruments, connect the

TW-47 to a TW intercom and repeatedly assert a call signal.

Adjust the pot until the red transmit on light on the front panel

accurately tracks the call signal.

CHECK OUT AND OPERATION OF THE

TW-47 SYSTEM

After you have made the appropriate custom cable and connected

the TW-47 to the wired main and wireless base stations, it is now

time to check that everything is working properly.

1. Turn on the base station radio and the remote radio.

Make sure you have fresh or fully charged batteries.

With the external jacks on the base station removed,

make sure the radios are communicating with each

other.

2. Set the base station volume control to approximately half

volume. Have one person listen on the intercom and

have another person talk on the remote walkie-talkie.

You should now be able to communicate from the

remote station walkie-talkie through the base station

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Clear-com TW-47 User Manual Page 17