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Glossary
AT-MIO-16X User Manual G-16
©
National Instruments Corporation
NIST National Institute of Standards and Technology
nodes execution elements of a block diagram consisting of functions,
structures, and subVIs
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 LabVIEW 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.
nonreferenced signal signal sources with voltage signals that are not connected to an absolute
sources reference or system ground. Also called floating signal sources. Some
common example of nonreferenced signal sources are batteries,
transformers, or thermocouples.
NRSE nonreferenced single-ended mode—all measurements are made with
respect to a common (NRSE) measurement system reference, but the
voltage at this reference can vary with respect to the measurement
system ground
Nyquist Sampling a law of sampling theory stating that if a continuous bandwidth-limited
Theorem signal contains no frequency components higher than half the frequency
at which it is sampled, then the original signal can be recovered without
distortion
O
onboard channels channels provided by the plug-in data acquisition board
onboard RAM optional RAM usually installed into SIMM slots
OpenDoc a compound document architecture created by the joining of several
technologies supplied by Apple (the base OpenDoc architecture, the
Bento file system and the Open Scripting Architecture) and IBM
(the System Object Model)