Icom IC-7000, Instruction Manual, Page: 126 / 166

D
AH-4 operation
117
10
ANTENNA TUNER OPERATION
Tuning is required for each frequency.
Be sure
to re-
tune the antenna before transmitting when you
change the frequency—even slightly.
q
Set the desired frequency in an HF band.
• The AH-4 will not operate on frequencies outside of
ham bands.
w
Push
[TUNER/CALL]
for 1 sec.
• “ ” indicator and “CW” appears while tuning.
e
“ ” indicator stays ON when tuning is com-
plete.
• When the connected wire cannot be tuned, “ ” in-
dicator blinks, and the AH-4 is bypassed and the an-
tenna wire is connected to the antenna connector on
the transceiver directly.
r
To bypass the AH-4 manually, push
[TUNER/
CALL]
.
• PTT tune function
The AH-4 is always tuned when the PTT is pushed
after the frequency is changed (more than 1%). This
function removes the “push and hold
[TUNER/CALL]
”
operation and activates first transmission on the new
frequency. This function is turned ON in the miscella-
neous (others) set mode (p. 133).
CONVENIENT
■
Optional AH-4
AUTOMATIC ANTENNA TUNER
operation
The AH-4 matches the IC-7000 to a long wire antenna
more than 7 m/23 ft long (3.5 MHz and above).
• See p. 20 for connection.
• See the AH-4 instruction manual for AH-4 installation and
antenna connection details.
NEVER
operate the AH-4 without an antenna wire.
The tuner and transceiver will be damaged.
NEVER
operate the AH-4 when it is ungrounded.
Transmitting before tuning may damage the trans-
ceiver. Note that the AH-4 cannot tune when using a
1
⁄
2
h
long wire or multiple of the operating frequency.
[TUNER/CALL]
R DANGER!: HIGH VOLTAGE!
NEVER
touch the antenna element while tuning or
transmitting.
AH-4 setting example:
For mobile operation
For outdoor operation
Long wire
Optional AH-2b
antenna element
Menu group selection
Push
[MENU/GRP]
for 1 sec.
Selection from:
M
,
S
or
G
(Graphic)
Menu selection (Example: M)
Push
[MENU/GRP]
momentarily.
Selection from:
S-1
,
S-2
or
S-3
Either
Y or Z
Either
Y or Z