Installation And Connections; Unpacking; Selecting A Location; Grounding - Icom IC-746PRO Instruction Manual

2

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-746PRO, see 'Supplied ac-
cessories' on p. ii of this manual.

Selecting a location

Select a location for the transceiver that allows ade-
quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele-
ments, radios and other electro magnetic sources.
The base of the transceiver has an adjustable stand
for desktop use. Set the stand to one of two angles de-
pending on your operating conditions.

Grounding

To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob-
lems, ground the transceiver through the GROUND
terminal 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.
R WARNING: NEVER
terminal to a gas or electric pipe, since the connec-
tion could cause an explosion or electric shock.
13
For radio communications, the antenna is of critical im-
portance, along with output power and sensitivity. Se-
lect antenna(s), such as a well-matched 50 Ω antenna,
and feedline. 1.5:1 or better of Voltage Standing Wave
Ratio (VSWR) is recommended for your desired band.
Of course, the transmission line should be a coaxial
cable.
When using 1 antenna, use the [ANT1] connector.
CAUTION:
by using a lightning arrestor.
PL-259 CONNECTOR INSTALLATION EXAMPLE
q
w
e
r
Antenna SWR
Each antenna is tuned for a specified frequency
range and SWR may be increased out-of-range.
When the SWR is higher than approx. 2.0:1, the
transceiver's power drops to protect the final transis-
tor. In this case, an antenna tuner is useful to match
the transceiver and antenna. Low SWR allows full
power for transmitting even when using the antenna
connect the [GND]
tuner. The IC-746PRO has an SWR meter to moni-
tor the antenna SWR continuously.

Antenna connection

Protect your transceiver from lightning
30 mm
Coupling ring 10 mm (soft solder)
10 mm
Soft
solder
1–2 mm
solder solder
30 mm ≈ in 10 mm ≈
9
⁄
8
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Strip the cable as
shown at left. Soft sol-
der the center con-
ductor.
Slide the connector
body on and solder it.
Screw the coupling
ring onto the
connector body.
in 1–2 mm ≈
3 1
⁄ ⁄ in
8 16