Icom IC-7700

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] 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 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: Protect your transceiver from light-
ning by using a lightning arrestor.
■ USB flash drive connection
Connect the USB flash drive* to the USB connector.
•Unmountoperationisrecommendedbeforeremovingthe
USB flash drive* (p.12-25).
Make sure to connect the USB flash drive correctly.
NEVER connect or remove the USB flash drive
when the read/write indicator lights or blinks.
A USB keyboard* or USB hub* can also be con-
nected to the USB connector.
*: USB flash drive, USB keyboard or USB hub is not sup-
plied 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approximately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.
PL-259 CONNECTOR INSTALLATION EXAMPLE
30 mm ≈ 1.18 in 10 mm ≈ 0.39 in 1–2 mm ≈ 0.04–0.08 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.
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