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APPENDIX I
GLOSSARY
COMPONENT PARTS­ Individual units of a sub-
ALARM ACKNOWLEDGE­ Push button that must
be depressed to silence an alarm horn.
assembly.
ALARM LOG­ Record of quantities that are in an
COMPONENTS­ Any electrical device, such as a coil,
alarm condition only.
resistor, transistor, and so forth.
ANALOG DATA­ Data represented in continuous
COMPUTER­ A data processor that can perform sub-
form, as contrasted with digital data having discrete
stantial computation, including numerous arith-
values.
metic or logic operations, without the intervention
by a human operator during the run.
AND GATE­ (1) An electronic gate whose output is
energized only when every input is in its prescribed
CONDITION­ State of being of a device, such as ON-
state. An AND gate performs the function of the
OFF, GO-NO GO, and SO forth.
logical "AND"; also called an AND circuit. (2) A
CONTINUOUS DISPLAY­ Electrical instrument
binary circuit, with two or more inputs and a single
giving a continuous indication of a measured
output, in which the output is a logic 1 only when
quantity.
all inputs are a logic 1 and the output is a logic 0
when any one of the inputs is a logic 0.
CONTROL MODE­ Method of system control at a
given time.
ANNUNCIATOR­ A device that gives an audible and
a visual indication of an alarm condition.
CONTROL POWER­ Power used to control or operate
ASSEMBLY­ A number of parts or subassemblies, or
a component.
any combination thereof, joined together to perform
CONTROL TRANSMITTER (CX)­ A type of
a specific function.
synchro that converts a mechanical input, which is
BELL LOG­ A printed record of changes in the ship's
the angular position of its rotor, into an electrical
operative conditions, such as speed or point of
output signal. The output is taken from the stator
control.
windings and is used to drive either a CDX or CT.
BINARY UNIT­ One of the two possible alternatives,
CONTROL TRANSFORMER (CT)­ A type of
such as 1 or 0, YES or NO, ON or OFF.
synchro that compares two signals: the electrical
BLOCK DIAGRAM­ Drawing of a system using
signal applied to its stator and the mechanical signal
blocks for components to show the relationship of
applied to its rotor. The output is an electrical volt-
components.
age, which is taken from the rotor winding and is
used to control a power-amplifying device. The
C A L I B R A T I O N ACTIONS­ The number of
phase and amplitude of the output voltage depends
calibrations performed by the related calibration
on the angular position of the rotor with respect to
activity (laboratory) during the reporting period.
the magnetic field of the stator.
CARD­ See PRINTED CIRCUIT BOARD.
CONTROL SIGNAL­ Signal applied to a device that
CASUALTY­ An event or series of events in progress
makes corrective changes in a controlled process.
during which equipment damage and/or personnel
injury has already occurred. The nature and speed
CONTROL DIFFERENTIAL TRANSMITTER
of these events are such that proper and correct
(CDX)­ A type of synchro that transmits angular
procedural steps will only serve to limit equipment
information equal to the algebraic sum or difference
damage and/or personnel injury.
of the electrical input supplied to its stator, and the
mechanical input supplied to its rotor. The output is
CLOCK­ An instrument for measuring and indicating
an electrical voltage taken from the rotor windings.
time, such as a synchronous pulse generator.
AI-1

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