9
Operation
Button Functions and LED Indications
Power: The Power button turns the tuner on and off. In the off state, the tuner is in bypass mode,
routing RF from your transmitter or amplifier directly to Ant 2 with no matching. No buttons,
except the Power button, will be active.
Pressing the Power button toggles the tuner between off and on states. When toggled to the on
state, the tuner resets to the last tuned setting (including antenna selection) before the previous
power-down. To turn the tuner off (that is, to put it in is low-power standby state), press and hold
the Power button for about 3 seconds. The LEDs will all light, then go out as the tuner powers
down.
Auto: The Auto button toggles the tuner between Automatic and Semi-automatic tuning. In Auto
mode, the tuner will begin a tuning cycle any time the SWR exceeds a threshold you set. In Semi-
automatic mode, the tuner will begin a tuning cycle only when you press the Tune button. The
Auto LED is on when the tuner is in Automatic mode.
Tune: The Tune button begins a semi-automatic tuning cycle, a memory tuning cycle, or places
the tuner in bypass mode. A momentary press (< 0.5 seconds) toggles the tuner between bypass
and its last tuned setting. The LED will blink once to confirm the change to bypass. Another short
press will restore the last tuned setting; the LED will blink three times.
A medium press (0.5 - 3 seconds) begins a memory tune; memories for the current frequency will
be scanned for a match. If stored parameters are not found, the tuner will automatically begin full
tuning cycle. The LED will come on after 0.5 seconds to indicate a memory tune. If the Tune
button is held longer than 3 seconds, the Tune LED will go off and a full tune will begin when the
Tune button is released.
Ant 1: Press the Ant 1 button to toggle between Ant 1 and Ant 2. The Ant 1 LED will be on for
Ant 1 and off for Ant 2. When you change antennas, the tuner references the last frequency used
on that antenna, and recalls tuning settings for that frequency, if any. When the tuner is off (or if
DC power is removed), the antenna selection defaults to the Ant 2 position.
Cap Up: The C Up button adds capacitance; holding the button down auto-repeats the add. The
LED blinks when you reach the upper capacitance limit.
Cap Dn: The C Dn button subtracts capacitance; holding the button down auto-repeats the
subtract. The LED blinks when you reach the lower capacitance limit.
Ind Up: The L Up button adds inductance; holding the button down auto-repeats the add. The
LED blinks when you reach the upper inductance limit.
Ind Dn: The L Dn button subtracts inductance; holding the button down auto-repeats the
subtract. The LED blinks when you reach the lower inductance limit.
Hi/Low Z: The Hi/Lo-Z relay can be manually selected to Hi by pressing the C Up and L Up
together. The two LEDs will light while the buttons are held. Pressing the C Dn and L Dn buttons
will set the relay to Lo. This setting is reset any time the tuner tunes.
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