LDG RT-100 Operation Manual - page 5
PAGE 5
GETTING TO KNOW YOUR RT-100
Your RT-100 is a quality, precision instrument that will give you many years of outstanding
service; take a few minutes to get to know it.
The RT-100 tuner is designed to be used as a remote antenna tuner, powered over a single
coax cable that carries both the RF energy and DC power. An on-board bias tee separates the RF
from the DC power. In order to power the RT-100, a separate bias tee must be used to inject DC
power at the feed end of the coax. Alternately, the optional RC-100 Controller unit may be used.
It contains not only a DC bias tee for injecting power, but also an Off/On power button, LED
power indicator, and a Tune button which momentarily interrupts power to the RT-100.
The RT-100 is powered via 12VDC, which is supplied over the same coax cable used for the
antenna feedline. A bias tee or optional RC-100 is needed at the radio end of the cable, to inject
DC power onto the feedline. Because power is supplied over coax, the existing coax feedline to
your antenna is all you need to hook up the RT-100. No additional cables are required in order to
run power or control signals to the tuner.
The RT-100 has 2,000 frequency memories. When tuning on or near a previously tuned
frequency, the RT-100 uses “Memory Tune” to recall the previous tuning parameters in a
fraction of a second. If no memorized settings are available, the tuner runs a full tuning cycle,
storing the parameters for memory recall on subsequent tuning cycles on that frequency. In this
manner, the RT-100 “learns” as it is used, adapting to the bands and frequencies as it goes. The
RT-100’s latching relays hold the tuned configuration indefinitely, even when DC power is
completely removed. Tuning memories are stored in non-volatile FLASH memory.