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Glossary
DAQCard-DIO-24 User Manual
G-8
©
National Instruments Corporation
MB
megabytes of memory
Mbytes/s
a unit for data transfer that means 1 million or 10
6
bytes/s
MIO
multifunction I/O
MSB
most significant bit
N
nibble
one-half of a byte; namely, four adjacent bits; in this manual, upper and
lower nibbles
NI-DAQ
National Instruments driver software for DAQ hardware
NO
normally open
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
a type of digital acquisition/generation where software updates the
digital lines or port states immediately or returns the digital value of an
input line. Also called immediate digital I/O or non-handshaking
O
OBF
output buffer full signal
OBFA
output buffer full for port A signal
OBFB
output buffer full for port B signal
onboard channels
channels provided by the plug-in data acquisition board
operating system
base-level software that controls a computer, runs programs, interacts
with users, and communicates with installed hardware or peripheral
devices
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