LDG AT-200Pro Manual - page 7
7
Installation
Your AT-200Pro tuner is intended for indoor use only; it is not water resistant. If you use it
outdoors (Field Day, for example) you must protect it from rain. The AT-200Pro is designed for
use with coax-fed antennas. If you wish to use it with longwires or antennas fed with a balanced
transmission line (e.g., ladder line), an external balun is required; either the LDG RBA-4:1 or
RBA-1:1 is ideal, depending on the antenna and transmission line used.
Always turn your radio off before plugging or unplugging anything. Your radio may be damaged if
you connect or disconnect a cable with the unit powered up. Note that some radios do not power
down the tuner even when the radio is turned off. To be safe, unplug the tuner's power connector
before plugging or unplugging anything else.
Connect the HF antenna jack on your transmitter or transceiver to the
Tx
jack on the back of your
AT-200Pro tuner using a coax jumper with standard PL-259 plugs (not provided). Properly
soldered connectors will be far more satisfactory and reliable than crimp-on or “solderless”
connectors. Attach your antenna lead-in coax to either the Ant 1 or Ant 2 jack on the back of your
AT-200Pro tuner. You will select the appropriate antenna from the front panel (see Operating
Instructions).
Your AT-200Pro can interface directly with many popular transceivers, enabling their “Tune”
button to start a tuning cycle, and in most cases providing power to the tuner. Optional cables and
interface adapters are available from LDG for many Alinco, Icom, Kenwood and Yaesu
transceivers. If you are using a transceiver interface, plug the adapter into the appropriate accessory
jack on the radio, and plug the stereo plug on the interface adapter cable into the Radio Interface
jack on the back of the tuner.
If you are not using an interface cable to a radio capable of powering the tuner, connect your AT-
200Pro to a source of DC power capable of providing 11 – 15 volts DC at 750 mA, using the
provided 2.5x5.5mm coaxial cable (center positive). If your radio is powered by 12 VDC, you can
use the same power supply for the AT-200Pro, providing the power supply can source the extra
750 mA required by the tuner during a tuning cycle.
Grounding your tuner will enhance its performance and safety. LDG recommends that you connect
your tuner to a suitable ground; a common ground rod connected to buried radials is preferred, but
a single ground rod, a cold water pipe or the screw that holds the cover on an AC outlet can
provide a serviceable ground. LDG strongly recommends that you use a properly installed, high
quality lightning arrestor on all antenna cables.