Glossary
PCI/PXI-1408 and NI-IMAQ for Win95/NT
G-8
©
National Instruments Corporation
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
I/O
input/output—the transfer of data to/from a computer system
involving communications channels, operator interface devices,
and/or data acquisition and control interfaces
IRQ
interrupt request
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
luminance
the brightness information in the video picture. The luminance
signal amplitude varies in proportion to the brightness of the
video signal and corresponds exactly to the monochrome picture.
LUT
look-up table—a selection in the
IMAQconf
configuration utility
that contains formulas that let you implement simple imaging
operations such as contrast enhancement, data inversion, gamma
manipulation, or other nonlinear transfer functions