Manual Icom IC-FR3100 FR4100 (page 8 of 24) (English)

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INSTALLATION AND CONNECTIONS

■ Unpacking

After unpacking, immediately report any damage to the

delivering carrier or dealer. Keep the shipping cartons.

For a description and a diagram of accessory equip-

ment included with the IC-FR3100/FR4100 series, see

‘Supplied Accessories’ on p. ii of this manual.

■ Selecting a location

Select a location for the repeater that allows adequate

air circulation, free from extreme heat, cold, or vibra-

tions, and away from TV sets, TV antenna elements,

radios and other electromagnetic sources.

■ Antenna connection

For radio communications, the antenna is of critical im-

portance, along with output power and sensitivity. Se-

lecting antenna(s), such as a well-matched 50 Ω an-

tenna, and feedline. 1.5:1 or better of Voltage Standing

Wave Ratio (VSWR) is recommended for the desired

band. Of course, the transmission line should be a

coaxial cable.

CAUTION: Protect the repeater from lightning by

using a lightning arrestor.

NOTE: There are many publications covering

proper antennas and their installation. Check with

your local dealer for more information and recom-

mendations.

■ Duplexer

A duplexer is separately required when only one an-

tenna is used for both transmitting and receiving. Se-

lect a duplexer according to the transmitting and re-

ceiving frequencies. Ask your Dealer for details.

■ Grounding

To prevent electrical shock, television interference

(TVI), broadcast interference (BCI) and other prob-

lems, ground the transceiver through the [GND] termi-

nal on the rear panel.

For best results, connect a heavy gauge wire or strap

to a long earth-sunk copper rod. Make the distance be-

tween the [GND] terminal and ground as short as pos-

sible.

WARNING:

NEVER connect the [GND] termi-

nal to a gas or electric pipe, since the connection

could cause an explosion or electric shock.

TX/TX•RX

EXT SP REMOTE

ACC

GND

BATTERY

TYPE-N CONNECTOR INSTALLATION EXAMPLE

30 mm ≈

⁄

8 in 10 mm ≈

⁄

8 in 1–2 mm ≈

⁄

16 in

Slide the nut, flat washer, rubber gasket and clamp over the coaxial

cable, then cut the end of the cable evenly.

Strip the cable and fold the braid back over the clamp.

Soft solder the center conductor. Install the center conductor pin and

solder it.

Carefully slide the plug body into place aligning the center conductor

pin on the cable. Tighten the nut onto the plug body.

15 mm

3 mm

6 mm

No space

Solder hole

Be sure the center conductor is

the same height as the plug body.

Clamp

Center

conductor

Washer

Nut Rubber gasket

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Icom IC-FR3100 FR4100 Manual

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