10-5
■ Antenna tuner operation
The internal automatic antenna tuner matches the
transceiver to the connected antenna automatically.
After the tuner matches an antenna, the variable ca-
pacitor angles 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
point.
CAUTION: NEVER transmit with the tuner ON when
no antenna is connected. This will damage the
transceiver. Be careful of the antenna selection.
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.
•WhenthetunerisON,[TUNER]switchindicatorlights
green.
•Whiletuning,[TUNER]switchindicatorblinksgreen.
• MANUAL TUNING
During SSB operation at low voice levels, the internal
tuner may not be tuned correctly. In such cases, man-
ual tuning is helpful.
➥ Hold down [TUNER] for 1 second, to start manual
tuning.
•Asidetone is emitted and[TUNER] switchindicator
blinks red while tuning.
•IfthetunercannotreducetheSWRtolessthan1.5:1
after 20 seconds of tuning, the [TUNER] switch indicator
goes out.
• AUTOMATIC TUNER START (HF bands only)
If you want to deactivate the tuner under conditions
ofVSWR1.5:1orless,usetheautotunerstartfunc-
tion and turn the tuner OFF. This function activates the
tuner automatically when the SWR exceeds 1.5:1.
This function is turned ON in set mode. (p. 12-16).
10
ANTENNA TUNER OPERATION
NOTES:
•NEVER transmit without an antenna properly con-
nected to antenna port in use.
•When2ormoreantennasareconnected,select
the antenna to be used with [ANT].
•IftheSWRishigherthanabout1.5:1whentun-
ing above 100 kHz on an antenna’s preset point,
hold down [TUNER] for 1 second to start manual
tuning.
•TheinternaltunermaynotbeabletotuneinAM
mode. In such cases, hold down [TUNER] for 1
second to manually tune.
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