lead are positive. When you connect to DC power, the power LED will flash once, and the tuner will
remain in the off state.
Operation
Meter bounce codes
In addition to displaying power and SWR, the power meters also indicate several important tuner states.
The meters are used as a kind of digital output device; they “bounce” to indicate information. While
bouncing, they do not indicate power levels.
There are three levels of bounce (100 {Low}, 300 {Mid} and 1,000 {High} watt marks on the forward
power meter) and two speeds (fast and slow). For example, when you press [Ind Dn + Cap Dn] to place the
tuner into bypass, the meter bounces to the 100 watt mark at the slow rate until you release the buttons.
Some functions are indicated by one or two discrete bounces, other by steady bouncing until a key is
released.
Power-Up Options
There are two power-up options, selected by holding down one ore more buttons while applying DC power
(typically by plugging in the DC power connector).
Version Display
: press and hold the Power button while applying DC power to the tuner. The meter will
"bounce" to indicate the software version number. The REFLECTED meter will first bounce out the whole
number part of the version number, then the FORWARD meter will bounce the fractional part. For
example, if the version number is 2.4, the REFLECTED meter will bounce twice, then the FORWARD
meter will bounce 4 times. This is only an example; your tuner may have a different software version.
Status and Tune Memory Clear
: Press and hold the Power and Tune button while applying DC power. This
clears all tune memories, and is indicated by three meter bounces in a REFLECTED - FORWARD
sequence. To clear the memories, you must continue to hold both buttons down until the three bounce
sequence has completed. If you release either or both buttons before the bounce sequence has completed,
the memory clear command is aborted and the memories are not cleared.
Button Functions and Meter 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 your antenna with no matching. The meter light is off, but
the meters still indicate forward and reverse power.
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 before the previous power-down.
Tune
: The Tune button begins a semi-automatic tuning cycle, a memory tuning cycle, or places the tuner in
bypass mode. A momentary press (< 0.3 seconds) toggles the tuner between bypass and its last tuned
setting. Bypass is indicated by two Low meter bounces, while previous setting restore is indicated by one
Low meter bounce.
A medium press (0.3 - 2.5 seconds, indicated by both meters steady at the 300 Watt mark) begins a
memory tune; the 200 memories will be scanned for a match. A long press (> 2.5 seconds), indicated by
both meters steady at full scale) begins a full tuning cycle.
Cap Up: The Cap Up button adds capacitance; holding the button down auto-repeats the add. Both meters
bounce fast at the Low mark when you reach the upper capacitance limit.
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