Icom IC-7800 Instruction Manual - Page 28

Grounding, Antenna connection, CF Compact Flash memory card - jacket

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2 INSTALLATION AND CONNECTIONS I 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 earth-sunk copper 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. I Antenna connection PL-259 CONNECTOR INSTALLATION EXAMPLE q Coupling ring w e 30 mm 10 mm (soft solder) Slide the coupling ring down. Strip the cable jacket and soft solder. 10 mm Soft solder 1-2 mm solder solder Strip the cable as shown at left. Soft solder the center conductor. 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) for your desired band. Of course, the transmission line should be a coaxial cable. When using 1 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-7800 has an SWR meter to monitor the antenna SWR continuously. I CF (Compact Flash) memory card Read/write indicator Insert the supplied CF (Compact Flash) memory card into the CF memory card slot. • To remove the CF memory card, push-in the button, lo- cated at left hand side of the slot. Make sure to install the memory card correctly. NEVER insert or remove the CF memory card when the read/write indicator lights or blinks. 2-3

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2-3
■
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 earth-sunk copper rod. Make the distance be-
tween the [GND] terminal and ground as short as pos-
sible.
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) for your de-
sired band. Of course, the transmission line should be
a coaxial cable.
When using 1 antenna, use the [ANT1] connector.
CAUTION:
Protect your transceiver from lightning
by using a lightning arrestor.
■
CF (Compact Flash) memory card
Insert the supplied CF (Compact Flash) memory
card into the CF memory card slot.
• To remove the CF memory card, push-in the button, lo-
cated at left hand side of the slot.
Make sure to install the memory card correctly.
NEVER
insert or remove the CF memory card
when the read/write indicator lights or blinks.
Read/write indicator
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-7800 has an SWR
meter to monitor the antenna SWR continuously.
2
INSTALLATION AND CONNECTIONS
PL-259 CONNECTOR INSTALLATION EXAMPLE
30 mm
≈
9
²
8
in
10 mm
≈
3
²
8
in
1–2 mm
≈
1
²
16
in
30 mm
10 mm (soft solder)
10 mm
1
–
2 mm
solder solder
Soft
solder
Coupling ring
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Slide the connector
body on and solder it.
Screw the coupling
ring
onto
the
connector body.
Strip the cable as
shown at left. Soft sol-
der the center con-
ductor.
q
w
e
r