18WuD2x

674 target discrimination • tee-equivalent circuit
Output
V
115 Vac
Secondary
tapped transformer
Primary
target discrimination The extent to which a radar
system can distinguish between two targets that
are close together. Also called target resolution. It
is specified in linear units (such as meters, kilometers,
or miles).
target identification Any method by which the
identity of a radar target is determined.
target voltage In a television camera tube, the
backplate-to-cathode voltage.
task environment The characteristics of the space
in which an autonomous robot works. It depends
on such factors as the intended application(s),
the required speed at which the robot(s) must
work, and the human/robotic or computer/
robotic interface.
task-level programming In robotics, the writing of
programs to perform sequences of actions. A
complex process, it is a primitive level of artificial
intelligence (AI). An example is a program that directs
a robot to prepare and serve a meal.
taut-band meter A movable-coil meter in which
the conventional spiral springs of the coil are replaced
by two tightly stretched, thin, straight
metal ribbons, whose twist provides torque that
returns the pointer to zero after a deflection.
Tb Symbol for TERBIUM.
BS Abbreviation of talk between ships.
Tc Symbol for TECHNETIUM.
TCCO Abbreviation of TEMPERATURE-CON-
TROLLED CRYSTAL OSCILLATOR.
T circuit See TEE NETWORK.
T circuit parameters See R PARAMETERS.
T circulator See TEE CIRCULATOR.
TCL Abbreviation of TRANSISTOR-COUPLED
LOGIC.
TCM Abbreviation of thermocouple meter (see
THERMOCOUPLE-TYPE METER).
TDM Abbreviation of TIME-DIVISION MULTIPLEX.
TDR 1. Abbreviation of TIME-DELAY RELAY (see
DELAY RELAY). 2. Abbreviation of TIME-
DOMAIN REFLECTOMETRY.
TDS Abbreviation of TIME-DELAY SPECTROME-
TRY.
TE Abbreviation of transverse electric (see, for example,
TRANSVERSE ELECTRIC MODE).
Te Symbol for TELLURIUM.
teach box A robot-control device via which an operator
can program the machine to carry out specific
movements. The operator manipulates
controls, and the robot’s computer stores the
data. When the data is accessed, the robot reproduces
the motions.
tearing In a television picture, the abnormal condition
in which poor synchronization causes the
horizontal lines to be irregularly displaced. The
effect resembles cloth being torn.
technetium Symbol, Tc. A metallic element produced
artificially. Atomic number, 43. Atomic
weight, 98. Formerly called masurium.
technician 1. A person who repairs faulty
electronic equipment. 2. A person who assists
with the design and debugging of a system prototype.
3. A person who operates an electronic
system.
technocentrism Overdependence on, and/or obsession
with, the products of technology, particularly
computers.
tee Pertaining to a network, connection, or configuration
whose geometric shape or schematic representation
resembles an uppercase letter T.
tee adapter See TEE JUNCTION.
tee antenna An antenna consisting of a horizontal
radiator with a vertical lead-in or feeder connected
to its center point.
Insulator
Horizontal
section
Antenna
tuner
tee antenna
Insulator
Vertical
section
tee circuit See TEE NETWORK.
tee circulator In microwave systems, a tee-shaped
junction of three waveguides with a ferrite post at
the junction.
tee-equivalent circuit An equivalent circuit in
which the components are arranged in the form
of a tee. See, for example, TEE NETWORK and
R PARAMETERS.