Glossary
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National Instruments Corporation
G-7
INL
Integral nonlinearity. A measure in LSB of the worst-case deviation from
the ideal A/D or D/A transfer characteristic of the analog I/O circuitry.
instrument driver
A set of high-level software functions, such as NI-IMAQ, that control
specific plug-in computer boards. Instrument drivers are available in
several forms, ranging from a function callable from a programming
language to a virtual instrument (VI) in LabVIEW.
interlaced
A video frame composed of two interleaved fields. The number of lines in
a field are half the number of lines in an interlaced frame.
interpreter
A software utility that executes source code from a high-level language
such as Basic, C or Pascal, by reading one line at a time and executing the
specified operation. See also compiler.
interrupt
A computer signal indicating that the CPU should suspend its current task
to service a designated activity.
interrupt level
The relative priority at which a device can interrupt.
IRQ
Interrupt request. See interrupt.
K
k
Kilo. The standard metric prefix for 1,000, or 10
3
, used with units of
measure such as volts, hertz, and meters.
K
Kilo. The prefix for 1,024, or 2
10
, used with B in quantifying data or
computer memory.
kbytes/s
A unit for data transfer that means 1,000 or 10
3
bytes/s.
Kword
1,024 words of memory.
L
library
A file containing compiled object modules, each comprised of one of more
functions, that can be linked to other object modules that make use of these
functions.
line count
The total number of horizontal lines in the picture.
LSB
Least significant bit.
