Antenna Tuner Operation; About The Internal Antenna Tuner; About Manual Tuning - Icom IC-PW2 Instruction Manual

About the internal antenna tuner

The internal antenna tuner automatically matches the
linear amplifier to the antenna within the impedance
range of 16.7 ~ 150 Ω (VSWR of 3:1 or less).
z To tune at the desired operating frequency, use
manual tuning, as explained to the right.
• After the tuner matches an antenna, the relay
combinations are memorized as a preset point.
L The tuning will not start even if the tuner is turned ON
and transmitting from the exciter.
by pushing TUNER
z The ON/OFF setting of the tuner is memorized for
each frequency band and each antenna connector
(ANT 1 to ANT 6).
L The next time you turn ON the tuner and select the
frequency that has been manually tuned, the memorized
relay combinations are automatically preset.
If the antenna cannot be matched by tuning at the
preset point, do the manual tuning steps again.
z Up to 100 tuning relay combinations can be
memorized for each antenna connector in 1 kHz
steps.
You can delete all of the preset points with the
"<<Tuner Preset Memory Clear>>" item on the
FUNCTION screen. (p. 9-1)
SET > Function >
»
MENU
<<Tuner Preset Memory Clear>>
NOTE:
• The exciter's internal antenna tuner must be
turned OFF.
• When a wire antenna cannot be tuned, check the
wire length and connection.
Note that the IC-PW2 cannot tune a wire that is
½λ long or on a multiple of that frequency.
• When the operating frequency is changed, the
antenna must be tuned again.
TIP: Tuning during the Split frequency operation
When the Icom exciter meets all of the following
conditions, the amplifier automatically tunes
(presets) the antenna on the transmit frequency
even if the exciter's receive frequency is changed by
100 kHz or more.
• "AUTO" is selected in the BAND window.
• Supports the linked manual tuning.
• During the Split frequency operation.
L When the exciter meets all of the following conditions,
the amplifier automatically presets the antenna on the
receive frequency when the exciter's receive frequency
is changed by 100 kHz or more.
• "CI-V Output (for ANT)*" is set to "OFF," or does not
support the CI-V commands.
• Connected to (Lights green: RX side).
• During the Split frequency operation.
* When an Icom exciter that supports the linked manual
tuning is connected, it is automatically set to "ON."

ANTENNA TUNER OPERATION

About manual tuning

You can manually tune the antenna before transmitting.
1. Hold down
• The indicator on
• "Starts tuning. Start transmitting." is displayed.
L When an Icom exciter that supports the linked
manual tuning is connected, the exciter starts
transmitting at the same time.
2. When an exciter that does not support the linked
manual tuning is connected, transmit from the
exciter connected to
side).
• After tuning, the indicator on
and the internal antenna tuner stays ON.
L Tuning normally takes 2 ~ 3 seconds.
L If "The tuning failed. Stop transmitting." is displayed,
stop the transmission.
The indicator on
circuit is automatically bypassed.
NOTE:
• When the operating frequency is changed by 1
kHz or more, the linear amplifier automatically
matches the antenna on that new frequency.
BE SURE to manually tune when the transmit
SWR of the antenna is 1.5:1 or more, even after
automatically tuning.
• If the antenna cannot be matched even after
manual tuning, check the impedance and antenna
SWR.
5-1
for 1 second.
TUNER
and blink red.
TUNER
(Lights orange: TX/RX
lights white,
TUNER
goes out, and the tuning
TUNER
5
4
5