W At-160 Hf Automatic Antenna Tuner - Icom IC-707 Instruction Manual

OPERATION 3
Mi AT-160 HF AUTOMATIC ANTENNA TUNER
The AT-160 matches the IC-707 to the antenna if the AT-160 cannot tune the connected
automatically. The AT-160 has memories for auto- antenna, "THRU" appears. The [ANT] connector
preset. No preset operation is required. is directly connected to the antenna.
installation and connection St
Refer to p. 11 and the AT-160 instruction manual,
connect the AT-160 to the IC-707. All required CAUTION: DO NOT transmit if the AT-160
cables are supplied with the AT-160. cannot tune the connected antenna, since the
Z \C-707 may be damaged.
SET mode setting
Refer to pgs. 30, 31, select tuner type "AT-160." Automatic tuning
Once manual tuning is performed, use the automatic
AT-160 operation tuning function for normal operation.
Only when the antenna is not matched to the 1) Select the desired frequency in a ham band.
operating frequency and SWR is high, activate the
AT-160. Otherwise, bypass the AT-160 using the
2) Push the [TUNER] switch to activate the AT-160.
through function.
l "TUNE" appears.
When you first use the AT-160, manual tuning is
required. Once manual tuning is performed, the
AT-160 automatically tunes the antenna when you
start transmitting. e When you start transmitting, the AT-160 automat-
, ically tunes the connected antenna.
Manual tuning
Perform manual tuning when: NOTE: if the AT-160 cannot tune the connected
— you first use the AT-160. antenna, "THRU" blinks irregularly during trans-
— you want to to tune the antenna to a operating mission. In this case, to re-tune the antenna,
frequency before transmitting. push and hold the [TUNER] switch until "TUNE"
Z blinks.
1) Select the desired frequency in a ham band.
Through function
2) Push and hold the [TUNER] switch until "TUNE" When the connected antenna is matched to the
blinks. operating frequency and SWR is low, bypass the
AT-160 manually. This decreases insertion loss.
è The AT-160 is bypassed and the [ANT] connector is
$4 s LJ +80
SRE Em ae
Po 50 100
e After tuning, the AT-160 automatically memorizes 2) To activate the AT-160, push the [TUNER] switch
the matching condition. temporarily.
e "TUNE" appears.
i IC-AT500, AT-150 HF AUTOMATIC ANTENNA TUNERS
Refer to the instruction manual included with each
antenna tuner. SET mode selection is not required.
The [TUNE] switch is not effective.