Glossary
©
National Instruments Corporation G-9 NI-IMAQ User Manual
memory buffer See buffer.
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 IMAQ 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 PA L.
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; it is
achieving widespread acceptance as a standard for PCs and workstations
and offers a theoretical maximum transfer rate of 132 Mbytes/s
PCLK pixel clock signal—times the sampling of pixels on a video line
UM.book Page 9 Monday, July 13, 1998 9:49 AM