Glossary
SC-2311 User Manual
G-10
ni.com
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 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
sources
signal sources with voltage signals that are not connected to an absolute
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
O
onboard channels
channels provided by the plug-in data acquisition device
optical isolation
the technique of using an optoelectric transmitter and receiver to transfer
data without electrical continuity, to eliminate high-potential differences
and transients
output slew rate
the maximum rate of change of analog output voltage from one level to
another
P
pad
a soldering location in the PWB used by the customer for signal connection
passband
the range of frequencies which a device can properly propagate or measure
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