Glossary
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National Instruments Corporation
G-3
buffer
Temporary storage for acquired data.
bus
A group of conductors that interconnect individual circuitry in a computer,
such as the PCI bus; typically the expansion vehicle to which I/O or other
devices are connected.
C
C
Celsius.
cache
High-speed processor memory that buffers commonly used instructions or
data to increase processing throughput.
CCIR
Comite Consultatif International des Radiocommunications. A committee
that developed standards for video signals. Also used to describe signals,
boards, and cameras that adhere to the CCIR standards.
CMOS
Complementary metal-oxide semiconductor.
CompactPCI
Refers to the core specification defined by the PCI Industrial Computer
Manufacturer’s Group (PICMG).
compiler
A software utility that converts a source program in a high-level
programming language, such as Basic, C, or Pascal, into an object or
compiled program in machine language. Compiled programs run 10 to
1,000 times faster than interpreted programs. See also interpreter.
conversion device
Device that transforms a signal from one form to another. For example,
analog-to-digital converters (ADCs) for analog input and digital-to-analog
converters (DACs) for analog output.
CPU
Central processing unit.
CSYNC
Composite synchronization signal. A combination of the horizontal and
vertical synchronization pulses.
D
D/A
Digital-to-analog.
DAC
Digital-to-analog converter. An electronic device, often an integrated
circuit, that converts a digital number into a corresponding analog voltage
or current.