D Tuner Operation; D Manual Tuning - Icom IC-718 Instruction Manual

8
ANTENNA TUNER OPERATION
Antenna tuner operation
The internal automatic antenna tuner matches the
transceiver to the connected antenna automatically.
After the tuner matches an antenna, the variable capac-
itor settings are memorized as a preset point for each
frequency range (100 kHz steps). Therefore, when you
change the frequency range, the variable capacitors are
automatically preset to the memorized setting.
CAUTION: NEVER transmit with the tuner ON
when no antenna is connected. This will damage
the transceiver. Be careful of the antenna selection.
For your convenience
When you purchase a brand-new antenna, or you
want to change the antenna settings, you can erase
the all of the internal antenna tuner preset points with
"Tuner Preset Memory Clear" in others set mode.
(p. ??)

D Tuner operation

Push [TUNER] to turn the internal antenna tuner
ON. The antenna is tuned automatically when the
antenna SWR is higher than 1.5:1.
• When the tuner is ON,
lights green
• While tuning,

D Manual tuning

During SSB operation at low voice levels, the internal
tuner may not automatically tune correctly. In such
cases, manual tuning is helpful.
Push and hold [TUNER] for 1 sec., to start man-
ual tuning.
• A side tone is emitted and the indicator on the
switch blinks red while tuning.
• If the tuner cannot reduce the SWR to less than
1.5:1 after 20 sec. of tuning, the indicator on the
switch goes out.
• Automatic tumer start (HF bands only)
If you want to deactivate the tuner under conditions
of VSWR 1.5:1 or less, use the auto tuner start func-
tion and turn the tuner OFF. This function activates
the tuner automatically when the SWR exceeds
1.5:1.
This function is controlled in set mode.
• Antenna tuner of the IC-PW1/EURO
When using an external antenna tuner such as the
IC-PW1/EURO's tuner, tune with the external an-
tenna tuner, while the internal tuner is turned OFF.
After tuning is completed, turn the internal tuner ON.
Otherwise, both tuners tune simultaneously and cor-
rect tuning may not be obtained.
113
the indicator on the switch
the indicator on the switch blinks.
(p.
NOTES:
• NEVER transmit without an antenna properly con-
nected to antenna port in use.
• When 2 antennas are connected, select the an-
tenna to be used with [ANT] (MF1).
• If the SWR is higher than about 1.5:1 when tun-
ing farther than 100 kHz from an antenna's pro-
grammed preset point, push and hold [TUNER] for
1 sec. to start manual tuning.
• The internal tuner may not be able to tune in
AM mode. In such cases, push and hold [TUNER]
for 1 sec. to manually tune.
When you purchase a brand-new antenna, or you
want to change the antenna settings, you can erase
the all of the internal antenna tuner preset points with
"Tuner Preset Memory Clear" in others set mode.
(p. ??)
TUNER
• PTT tuner start
The tuner is always tuned when the PTT is pushed
after the frequency is changed (more than 1% from
last-tuned frequency). This function removes the
"push and hold [TUNER]" operation and activates
for the first transmission on a new frequency.
??). This function is turned ON in set mode.
See the instruction manual included with each an-
tenna tuner for their respective operations.
(p. ??).