Clear-com TW-47 User Manual download pdf (Page 12)

TW-47 TWO-WAY RADIO INTERFACE

1-4

Figure 1-2: Connecting the TW-47 to a Base Station Radio

BUILDING YOUR CUSTOM CABLE

To connect the base-station radio to the TW-47, you must build

your own custom connector cable. This involves several steps.

1. Obtain or make a cable using mini or micro plugs that fit

your radio. Use single conductor shielded wire for each

cable. Miniature type stereo cable is a good choice.

Solder these cables to the DB9 connector as shown in

example 1. This cable length should be kept under 5 feet

(1.52 m). A good source of molded connectors for your

radio would be an external microphone or earphone

which can be purchased from your radio supplier. You

need to cut off the microphone or earphone as it will not

be needed.

2. The next step will be to set the type and level of

microphone. The TW-47 has three internal jumpers that

can be set for specific types of microphones. The three

illustrations that follow show how the TW-47 jumpers

and male DB-9 on the channel cable are configured for

most radios. The section that follows, “Option Settings,”

gives instructions for setting the TW-47’s internal

jumpers.

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Clear-com TW-47 User Manual Page 12