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Glossary
© National Instruments Corporation G-7 NI PXI/PCI-1411 User Manual
memory window Continuous blocks of memory that can be accessed quickly by changing
addresses on the local processor.
MSB Most significant bit.
MTBF Mean time between failure.
mux Multiplexer. A switching device with multiple inputs that selectively
connects one of its inputs to its output.
N
NI-IMAQ Driver software for National Instruments image acquisition hardware.
noninterlaced A video frame where all the lines are scanned sequentially, instead of
divided into two frames as in an interlaced video frame.
NTSC National Television Standards Committee. The committee that developed
the color video standard used primarily in North America, which uses
525 lines per frame. See also PAL.
NVRAM Nonvolatile RAM. RAM that is not erased when a device loses power or is
turned off.
O
operating system Base-level software that controls a computer, runs programs, interacts with
users, and communicates with installed hardware or peripheral devices.
P
PAL Phase Alternation Line. One of the European video color standards; uses
625 lines per frame. See also NTSC.
PCI Peripheral Component Interconnect. A high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA. PCI
offers a theoretical maximum transfer rate of 132 Mbytes/s.
pixel Picture element. The smallest division that makes up the video scan line;
for display on a computer monitor, a pixel’s optimum dimension is square
(aspect ratio of 1:1, or the width equal to the height).
pixel clock Divides the incoming horizontal video line into pixels.