TC 9-64 _________________________________________________________________________
TC
training circular
temperature
The condition in which warm air is formed above a
inversion
layer of cool air that is near the earth's surface.
three-element array
An array with two parasitic elements (reflector and
director) and a driven element.
TM
technical manual
tones
Musical sounds.
translucent
A type of substance, such as frosted glass, through
which some light rays can pass but through which
objects cannot be seen clearly.
transmission line
A device designed to guide electrical energy from one
point to another.
transmitting
The device used to send the transmitted signal energy
into space.
transparent
A type of substance, such as glass, that transmits
almost all of the light waves that fall upon it.
transmission
The various types of lines and waveguides used as
mediums
transmission lines.
transmitter end
See INPUT END.
transverse wave
The up and down motion of a wave as the wave moves
motion
outward.
The portion of the atmosphere closest to the earth's
surface, where all weather phenomena take place.
tropospheric scatter
The propagation of radio waves in the troposphere by
means of scatter.
trough (bottom)
The peak of the negative alternation (maximum value
below the line).
tuned line
Another name for the resonant line. This line uses
tuning devices to eliminate the reactance and to
transfer maximum power from the source to the line.
turnstile antenna
A type of antenna used in VHF communications that is
omnidirectional and consists of two horizontal half-
wave antennas mounted at right angles to each other in
the same horizontal plane.
Glossary-14
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