ICOM IC-7000 用户手册

DAH-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.

qSet the desired frequency in an HF band.

• The AH-4 will not operate on frequencies outside of

ham bands.

wPush [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.

rTo 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).

■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.

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]

RDANGER!: HIGH VOLTAGE!

NEVER touch the antenna element while tuning or
transmitting.

For mobile operation

For outdoor operation

Long wire

Optional AH-2b
antenna element

Push

[MENU/GRP] for 1 sec. 

Selection from: M, S or G(Graphic)

Push

[MENU/GRP] momentarily. 

Selection from: S-1, S-2 or S-3

Either

Y or Z

Either

Y

 or 

Z