Glossary
© National Instruments Corporation G-5 SCB-68 Shielded Connector Block User Manual
I
I/O input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
I
OH
current, output high
I
OL
current, output low
L
lowpass filter a filter that passes low frequencies
LSB least significant bit
M
m meter
MB megabytes of memory
MIO multifunction I/O
N
NC normally closed, or not connected
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,
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.
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
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