Installation And Connections; I Unpacking; I Selecting A Location; I Grounding - Icom IC-703 Instruction Manual

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INSTALLATION AND CONNECTIONS

I 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-703, see 'Supplied acces-
sories' on p. ii of this manual.

I 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 electromagnetic 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. (see description
at right page)

I 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
minal to a gas or electric pipe, since the connection
could cause an explosion or electric shock.
11
connect the [GND] ter-

I Antenna connection

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.
CAUTION:
Protect your transceiver from lightning
by using a lightning arrestor.
PL-259 CONNECTOR INSTALLATION EXAMPLE
q
30 mm
Coupling ring 10 mm (soft solder)
w
10 mm
Soft
solder
1–2 mm
e
solder solder
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-
tors. 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
tuner. The IC-703 has an SWR meter to monitor the
antenna SWR continuously.
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Strip the cable as
shown at left. Soft
solder the center con-
ductor.
Slide the connector
body on and solder it.
Screw the coupling
ring onto the connector
body.