AM (Amplitude Modulation) — AM radios control a model by varying
the amplitude (height) of a radio signal. AM radios are the
least costly, but the most affected by interference. See also FM
(PPM) and PCM. Analog — A radio that transmits control signals
by changing voltage levels. Analog systems tend to cost less,
which makes them ideal for beginners. See Digital. ATL
(Adjustable Throttxle Limiter) — This actually affects the
braking action on a pistol, by limiting how far forward the
trigger can move (travel.) May be adjusted mechanically,
electronically or (rare) both ways. ATV (Adjustable Travel
Volume) — See EPA. Band — The wavelength on which a radio
transmits, as measured in megahertz (MHz) or gigahertz (GHz).
There are currently five legal bands for R/C use: 72MHz (for air
use), 75MHz (for surface use) and 27MHz, 50MHz and 2.4GHz, which
can be used for either air or surface systems. BEC (Battery
Eliminator Circuitry) — BEC eliminates the need (and weight) of
a receiver battery, by allowing the receiver