LDG AT-200Pro Manual - page 5
5
Getting To Know Your AT-200Pro
Your AT-200Pro 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-200Pro can be used with any transceiver or transmitter with coax output operating
in the HF range at no more than 250 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:
•
Power
: turns the AT-200Pro on and off. When off, the tuner is in bypass. When turned on,
the tuner automatically resets to the last tuned setting
•
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 capacitance
•
Func
: Selects alternate functions for the other six buttons (see below)
•
PWR
: LED meter indicates forward power in 25 and 250 watt ranges
•
SWR
: LED meter indicates SWR while tuning or transmitting
After tuning, it automatically enters a “deep sleep” state in which it draws only about 10
milliamps. 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. Tuning memories are
stored indefinitely in EEPROM memory.
The AT-200Pro has a total of 16,000 "3-D" frequency memories. There are 8,000 memories for
each
of the two antenna ports, 2,000 tuning settings for each of four separate antennas. When you
transmit near a previously tuned frequency, you can use “Memory Tune” to reset the tuner in only
a fraction of a second. The process of storing tuning data in memory is completely automatic;
your AT-200Pro “learns” as you use it, adapting itself to all of the bands and frequencies you use.