AI-10
SYNCHRONIZER—Circuit that supplies timing signals to other radar components.
TARGET—In radar, a specific object of radar search or detection.
TARGET RESOLUTION—The ability of a radar to distinguish between two or more targets that are
close to each other.
THREE-DIMENSIONAL RADAR (3D)—Measures the range, bearing, and altitude of a target.
THYRATRON—Gas tube used as a modulator switching device.
TIMER—See Synchronizer.
TR RECOVERY TIME—Time required for a fired tr or atr tube to deionize to a normal level of
conductance.
TRACK—Operational phase of a fire-control or track radar during which the radar beam is kept on the
target.
TRACK RADAR—Radar that provides continuous range, bearing, and elevation data by keeping the rf
beam on the target.
TRANSMIT-RECEIVE TUBE (TR)—Gas-filled rf switch that is used as a duplexer.
TRANSMITTER—Equipment that generates, amplifies, and modulates electromagnetic energy.
TRANSMITTER FREQUENCY (CARRIER FREQUENCY)—The frequency of the unmodulated
output of a transmitter.
TRAVERSE (BEARING) SIGNAL—In a monopulse radar system, the combination of individual lobe
signals that represents target offset direction and amplitude from the antenna axis.
TRIGGER GENERATOR—See Synchronizer.
TRIGGER PULSES—In radar, pulses that are used to initiate specific events.
TRUE BEARING—Angle between a target and true north measured clockwise in the horizontal plane.
TRUE NORTH—Geographic north.
TRUNCATED PARABOLOID—A paraboloid reflector that has been cut away at the top and bottom to
increase beam width in the vertical plane.
TWO-DIMENSIONAL RADAR (2D)—Measures the range and bearing to a target.
UNBALANCED CRYSTAL MIXER—Circuit consisting of a section of coaxial transmission line one-
half wavelength long that is tuned to the difference (intermediate) frequency between the local
oscillator and rf echo signals.
VERTICAL PLANE—Imaginary plane that is perpendicular to the horizontal plane.
VIDEO ENHANCEMENT FEATURES—See Antijamming Circuits.
VOLTAGE STANDING WAVE RATIO (VSWR)—In a waveguide, the ratio of the electric field at a
maximum point to that of an adjacent minimum point.
