Icom IC-7700 Instruction Manual - Page 30

Grounding, Antenna connection, USB-Memory connection USB-Memory: Not supplied by Icom

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2 INSTALLATION AND CONNECTIONS ■ Grounding To prevent electrical shock, television interference (TVI), broadcast interference (BCI) and other problems, ground the transceiver through the GROUND terminal on the rear panel. For best results, connect a heavy 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] terminal to a gas or electric pipe, since the connection could cause an explosion or electric shock. ■ Antenna connection PL-259 CONNECTOR INSTALLATION EXAMPLE q Coupling ring 30 mm Slide the coupling ring onto the cable. Strip the cable jacket and 10 mm (soft solder) tin the braid. w 10 mm Soft Strip the cable as solder shown at left. Tin the 1-2 mm center conductor. 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 For radio communications, the antenna is of critical importance, along with output power and receiver sensitivity. Select antenna(s), such as a well-matched 50 Ω antenna, and 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, 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 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 transistors. In this case, an antenna tuner is useful to match the transceiver and antenna. Low SWR allows full power for transmitting. The IC-7700 has an SWR meter to monitor the antenna SWR continuously. ■ USB-Memory connection (USB-Memory: Not supplied by Icom) Connect the USB-Memory* to the USB connector. • Unmount operation is recommended before removing the USB-Memory* (p.12-25). Make sure to connect the USB-Memory correctly. NEVER connect or remove the USB-Memory when the read/write indicator lights or blinks. A USB keyboard* or USB hub* can also be connected to the USB connector. or *: USB-Memory, USB keyboard or USB hub is not supplied by Icom. 2-4

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2-4
2
INSTALLATION AND CONNECTIONS
■
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 ground rod. Make the distance between the
[GND] terminal and ground as short as possible.
R
WARNING: NEVER
connect the [GND]
terminal to a gas or electric pipe, since the connec-
tion 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 antenna(s), such as a well-matched 50
Ω
antenna, and feedline. We recommend 1.5:1 or better
of Voltage Standing Wave Ratio (VSWR) on your op-
erating bands. The transmission line should be a coax-
ial cable.
When using a single antenna, use the [ANT1] connec-
tor.
CAUTION:
Protect your transceiver from lightning
by using a lightning arrestor.
■
USB-Memory connection (USB-Memory: Not supplied by Icom)
Connect the USB-Memory* to the USB connector.
• Unmount operation is recommended before removing the
USB-Memory* (p.12-25).
Make sure to connect the USB-Memory correctly.
NEVER
connect or remove the USB-Memory when
the read/write indicator lights or blinks.
A USB keyboard* or USB hub* can also be con-
nected to the USB connector.
*: USB-Memory, USB keyboard or USB hub is not supplied
by Icom.
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. The IC-7700 has an SWR
meter to monitor the antenna SWR continuously.
PL-259 CONNECTOR INSTALLATION EXAMPLE
30 mm
≈
9
∕
8
in
10 mm
≈
3
∕
8
in
1–2 mm
≈
1
∕
16
in
30 mm
10 mm (soft solder)
10 mm
1–2 mm
solder solder
Soft
solder
Coupling ring
Slide the coupling ring
onto the cable. Strip
the cable jacket and
tin the braid.
Slide the connector
body on and solder it.
Screw the coupling
ring
onto
the
connector body.
Strip the cable as
shown at left. Tin the
center conductor.
q
w
e
r
or