D Ah-4 Operation - Icom IC-7000 Instruction Manual

10
ANTENNA TUNER OPERATION
■ Optional AH-4
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.
AH-4 setting example:
For mobile operation
For outdoor operation

D AH-4 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 and hold [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, "
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].
115
AUTOMATIC ANTENNA TUNER
Optional AH-2b
antenna element
Long wire
Menu group selection
Push [MENU/GRP] for 1 sec.
Selection from: M M , S S or G G (Graphic)
Menu selection (Example: M)
Push [MENU/GRP] momentarily.
Selection from: S S - - 1 1 , S S - - 2 2 or S S - - 3 3
operation
RDANGER!: HIGH VOLTAGE!
NEVER touch the antenna element while tuning or
transmitting.
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
⁄ λ long wire or on a multiple of that frequency.
2
[TUNER/CALL]
CONVENIENT
• 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. 131).
" in-
Either Either
Y Y or Z Z
or