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12
SETUP AND CONNECTIONS
12-5
Grounding
12-6
Antenna
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 t
a long earth-sunk copper rod. Make the distance be-
tween the GROUND terminal and ground as short as
possible.
v CAUTION: NEVER connect the [GND] terminal
to a gas or electrical pipe, since the connection
could cause an explosion or electric shock.
Select antenna(s), such as a well-matched 50 Ω an-
tenna, and feedline.The transmission line should be a
coaxial cable. 1.5:1 or better of Voltage Standing Wave
Ratio (VSWR) is recommended for your required band.
Of course, the transmission line should be a coaxial
cable.
When using 1 antenna, use the [ANT1] connector.
v CAUTION: Protect your transceiver from lighten-
ing by using a lightening arrestor.
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-746 has a SWR meter to monitor the
antenna SWR continuously.
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