LDG AT-100Pro User Manual - page 5
Getting To Know Your AT-100Pro
Your AT-100Pro is a quality, precision instrument that will give you many years of outstanding
service; take a few minutes to get to know it.
•
Your AT-100Pro can be used with any transceiver or transmitter with coax output operating
in the HF range at no more than 125 watts output. You can set the unit to tune automatically
whenever the SWR exceeds a set value, or you can set it to tune semi-automatically when you
start a tuning cycle by pressing the
Tune
button.
The front panel presents seven pushbutton controls, and two LED meters:
•
Tune
: Initiates either a memory or full tuning cycle, and also places the tuner in "bypass"
mode.
•
Ant
: Selects one of two antennas
•
C Up
: Manually increase capacitance
•
C Dn
: Manually decrease capacitance
•
L Up
: Manually increase inductance
•
L Dn
: Manually decrease inductance
•
Func
: Selects alternate functions for the other six buttons (see below)
•
PWR
: LED meter indicates forward power in 12.5 and 125 watt ranges
•
SWR
: LED meter indicates SWR while tuning or transmitting
There is no “Off” button; the AT-100Pro powers up as soon as you plug in an external power
supply. After tuning, it automatically enters a “deep sleep” state in which it draws only a few
milliamps of current, effectively off. The tuner will automatically "wake up" the next time you
start a tuning cycle, when RF is present, a button is pushed or when an automatic cycle is needed.
Your AT-100Pro employs latching relays which hold the tuned setting indefinitely, even when
DC power is completely removed by unplugging the power connector. Tuning memories are
stored indefinitely in EEPROM memory.
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