LDG AT-100Pro - Advanced Operation; Manual Adjustments and Status Queries

Off Mode
When any tuning cycle ends, the tuner automatically enters a “deep sleep” state in which it draws
just a few milliamps; it is effectively off. The tuner will automatically “wake up” the next time
you start a tuning cycle, when RF is present, a button is pressed or when an automatic tuning
cycle is required, if this option is selected. The latching relays will hold the tuned configuration
indefinitely, even when you unplug the power cable or turn off the transceiver powering the
tuner.
Advanced Operation
Manual adjustments
In rare cases, it may be desirable to manually adjust the match after a tuning cycle. This will
happen most often with antennas that are far from resonance at the operating frequency. The C
Up, C Dn, L Up and L Dn buttons increase and decrease capacitance and inductance,
respectively. Momentarily press any of these buttons to see the present setting; the value is
indicated on the display (C on the upper display, L on the lower), left justified (that is, the lowest
order relay is shown on the left). To changes these values, press repeatedly or hold any of these
buttons; you will see the value change. Then, key your transmitter to observe the achieved SWR
on the SWR meter. You can also manually change C and L as you transmit, observing the SWR
on the meter; however, the C and L values are not displayed in this case.
After manually adjusting the match, you can manually store the tuning parameters for the present
frequency; press the Func button, then the Tune button. The parameters are stored for later
recall, replacing any previously saved parameters for that frequency.
Frankly, you won't use the manual adjustments very much; your AT-100Pro is very, very good at
finding a match. These functions are included only to provide you with the maximum utility and
flexibility.
Status Query
You can query the status of most settings by pressing and holding the Func button while
pressing the relevant setting button. For example, to check the power scale of the PWR meter,
press and hold the Func key while pressing the L Up button. The PWR meter will indicate the
present scale setting without changing it. When done, release all buttons. Other status queries
include:
• Ant: Presently selected antenna
• C Up: Present PWR meter mode
• C Dn: Present tune mode (Auto or Semi)
• L Up: Present PWR meter scale
• L Dn: Present Auto Tune threshold
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