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T

TACHOMETER

(1) A small ac or dc generator, sometimes referred to as a rate generator, that converts its shaft speed into an electrical output. The tachometer is frequently used in servosystems to sense the velocity of a load [15]. (2) An instrument that measures the rate at which a shaft is turning [16].


TANK CIRCUIT

A tuned circuit used to temporarily store energy. Also referred to as a parallel-resonant circuit [9].


TAPPED RESISTOR

A wire-wound, fixed resistor having one or more additional terminals along its
length, generally for voltage-divider applications [1].


TARGET

In radar, a specific object of radar search or detection [18].

TARGET RESOLUTION

The ability of a radar to distinguish between two or more targets that are close
to each other [18].


TELECOMMUNICATIONS

The transmission, emission, or reception of signs, signals, writings, images, or sounds. This is done by visual, oral, wire, radio, or other means [17].


TELETYPEWRITER

A machine that can transmit and/or receive letters, numbers, or symbols. It may
have a keyboard similar to a typewriter [17].


TEMPERATURE COEFFICIENT

The amount of change of resistance in a material per unit change in temperature [1] [4].


TEMPERATURE INVERSION

The condition in which warm air is formed above a layer of cool air that
is near the earth's surface [10].


TEMPEST

A term normally used to describe compromising emanations. These emanations are unintentionally radiated signals that could disclose classified information [17].



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