Glossary
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National Instruments Corporation
G-7
DIO 6533 User Manual
mux
multiplexer—a switching device with multiple inputs that sequentially
connects each of its inputs to its output, typically at high speeds, in
order to measure several signals with a single analog input channel
N
NI-DAQ
NI driver software for DAQ hardware
noise
an undesirable electrical signal–Noise comes from external sources
such as the AC power line, motors, generators, transformers,
fluorescent lights, soldering irons, CRT displays, computers, electrical
storms, welders, radio transmitters, and internal sources such as
semiconductors, resistors, and capacitors. Noise corrupts signals you
are trying to send or receive.
nonlatched digital I/O
See unstrobed digital I/O.
O
operating system
base-level software that controls a computer, runs programs, interacts
with users, and communicates with installed hardware or peripheral
devices
optical isolation
the technique of using an optoelectric transmitter and receiver to
transfer data without electrical continuity, to eliminate high-potential
differences and transients
P
pattern generation
a type of strobed digital I/O in which timing signals pass either to or
from the digital device, but not in both directions. Typically, the timing
signals occur at a constant rate, resulting in constant-rate digital data
acquisition or waveform generation.
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
work-stations; it offers a theoretical maximum transfer rate of 132
Mbytes/s.
PCLK
peripheral clock signal
