Grounding; Antenna Connection; Usb-Memory Connection - Icom IC-7700 Instruction Manual

2
INSTALLATION AND CONNECTIONS

■ Grounding

■ Antenna connection

PL-259 CONNECTOR INSTALLATION EXAMPLE
q
30 mm
Coupling ring 10 mm (soft solder)
w
10 mm
1–2 mm
solder solder
e
r
30 mm ≈ 1.18 in 10 mm ≈ 0.39 in 1–2 mm ≈ 0.04–0.08 in
■ USB-Memory connection (USB-Memory: Not supplied by Icom)
Slide the coupling ring
onto the cable. Strip
the cable jacket and
tin the braid.
Soft Strip the cable as
solder
shown at left. Tin the
center conductor.
Slide the connector
body on and solder it.
Screw the coupling
ring onto
connector body.
or
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
minal to a gas or electric pipe, since the connection
could cause an explosion or electric shock.
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] con-
nector.
CAUTION:
ning 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
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.
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.
2-4
connect the [GND] ter-
Protect your transceiver from light-