Icom IC-7100 Instruction Manual - Page 26

Selecting a location, Grounding, Antenna connection, Antenna SWR - tuner

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2 INSTALLATION AND CONNECTIONS Selecting a location Select a location for the transceiver that allows adequate air circulation, free from extreme heat, cold, vibrations, away from TV sets, TV antenna elements, radios and other electromagnetic sources. The base of the transceiver has adjustable feet for desktop use. Set the feet to one of two angles, to meet your operating preference. Slide in the direction of arrow. Controller bottom view Grounding To prevent electrical shock, television interference (TVI), broadcast interference (BCI) and other problems, ground the transceiver using the GROUND terminal on the rear panel. For best results, connect a heaviest gauge wire or strap to a long ground rod. Make the distance between the [GND] terminal and ground as short as possible. R WARNING! NEVER connect the [GND] ter- minal to a gas or electric pipe, since the connection could cause an explosion or electric shock. Antenna connection For radio communications, the antenna is of critical importance, along with output power and receiver sensitivity. Select a well-matched 50 ø antenna and coaxial cable feedline. We recommend 1.5:1 or better of Voltage Standing Wave Ratio (VSWR) on your operating bands. The transmission line should be a coaxial cable. When using a single antenna (for the HF, 50/70 MHz bands), use the [ANT1] connector. CAUTION: Protect your transceiver from lightning by using a lightning arrestor. Antenna SWR Each antenna is tuned for a specified frequency range and the SWR usually increases outside the range. When the SWR is higher than approximately 2.0:1, the transceiver automatically reduces the TX power to protect the final transistors. In that case, an antenna tuner is useful to match the transceiver and antenna. Low SWR allows full power for transmitting. The IC-7100 has an SWR meter to continuously monitor the antenna SWR. Antenna connection Connect the cable from an HF, 50/70 MHz antenna to the [ANT 1] connector. Connect the cable from a 144/430MHz antenna to the [ANT 2] connector. PL-259 CONNECTOR INSTALLATION EXAMPLE q Coupling ring 30 mm 10 mm (Tin) Slide the coupling ring down. Strip the cable jacket and tin the shield. w 10 mm Tin Strip the cable as shown at the left. Tin the center conductor. 1-2 mm e solder solder Slide the connector body on and solder it. r Screw the coupling ring onto the connector body. (30 mm 9⁄8 in 10 mm 3⁄8 in 1-2 mm 1⁄16 in) 2-2

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2
INSTALLATION AND CONNECTIONS
2-2
Select a location for the transceiver that allows ad-
equate air circulation, free from extreme heat, cold,
vibrations, away from TV sets, TV antenna elements,
radios and other electromagnetic sources.
The base of the transceiver has adjustable feet for
desktop use. Set the feet to one of two angles, to meet
your operating preference.
Selecting a location
Grounding
To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other problems,
ground the transceiver using the GROUND terminal on
the rear panel.
For best results, connect a heaviest gauge wire or strap
to a long ground rod. Make the distance between the
[GND] terminal and ground as short as possible.
R
WARNING! NEVER
connect the [GND] ter-
minal to a gas or electric pipe, since the connection
could cause an explosion or electric shock.
Antenna connection
For radio communications, the antenna is of critical im-
portance, along with output power and receiver sensi-
tivity. Select a well-matched 50
ø
antenna and coaxial
cable feedline. We recommend 1.5:1 or better of Voltage
Standing Wave Ratio (VSWR) on your operating bands.
The transmission line should be a coaxial cable.
When using a single antenna (for the HF, 50/70 MHz
bands), use the [ANT1] connector.
CAUTION:
Protect your transceiver from lightning by
using a lightning arrestor.
30 mm
10 mm (Tin)
10 mm
1–2 mm
solder solder
Tin
Coupling ring
PL-259 CONNECTOR INSTALLATION EXAMPLE
q
e
r
w
Slide the coupling ring
down. Strip the cable
jacket and tin the
shield.
Slide the connector
body on and solder it.
Screw
the
coupling
ring onto the connector
body.
Strip the cable as
shown at the left. Tin
the center conductor.
(30 mm
9
/
8
in
10 mm
3
/
8
in
1–2 mm
1
/
16
in)
Antenna connection
Connect the cable from an HF, 50/70 MHz antenna to
the [ANT 1] connector.
Connect the cable from a 144/430MHz antenna to
the [ANT 2] connector.
Antenna SWR
Each antenna is tuned for a specified frequency
range and the SWR usually increases outside the
range. When the SWR is higher than approximately
2.0:1, the transceiver automatically reduces the TX
power to protect the final transistors. In that case, an
antenna tuner is useful to match the transceiver and
antenna. Low SWR allows full power for transmit-
ting. The IC-7100 has an SWR meter to continuously
monitor the antenna SWR.
Slide in the
direction of
arrow.
Controller bottom view