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Advanced Operation
Manual Inductor/Capacitor Adjustments
In some rare cases, after tuning, it may be desirable to adjust the inductance and capacitance
settings that the AT-600Pro came up with during the tuning process. This is more likely to occur
when attempting to tune an antenna far from its resonant frequency.
The
C Up, C Dn, L Up,
and
L Dn
buttons may be used to increase or decrease the amount of
capacitance or inductance, respectively. A momentary press of any of these buttons increases or
decreases the value by one unit, and displays the resulting value on the bargraph meter.
Capacitance value is displayed on the PWR bargraph, and inductance on the SWR bargraph.
These values are displayed in binary, left justified. The lowest-order relay is displayed on the
leftmost LED. The rightmost LED on the PWR bargraph displays the state of the High/Low
Impedance relay.
Repeatedly press one of these buttons to increase or decrease multiple times, or simply hold
the button and the button will auto-repeat. You may also transmit while increasing or decreasing,
so that the SWR value is displayed, but the capacitor and inductor values will not be displayed
during transmit; instead, the power and SWR levels are displayed.
High/Low Relay Adjustment
In addition to being able to manually control the inductor and capacitor value of the AT-
600Pro, it is also possible to manually set the high/low impedance relay, which determines
whether the tuner is an L-C configuration or a C-L configuration. To toggle the state of the
high/low impedance relay, press
Func -> Ant
. The LED display will show one of two patterns to
confirm the setting.
Manual Memory Store
Once manual adjustments are complete, press
Func -> Tune
(that is, press
Func
momentarily, then
Tune
momentarily) to store the current relay settings in the memory
associated with the frequency last transmitted upon.
Summary of Contents for AT-600Pro
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