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Glossary
©
National Instruments Corporation
G-7
DAQMeter DAQCard-4050 User Manual
L
LabVIEW
laboratory virtual instrument engineering workbench
M
m
meters
M
(1) Mega, the standard metric prefix for 1 million or 10
6
, when used
with units of measure such as volts and hertz; (2) mega, the prefix for
1,048,576, or 2
20
, when used with B to quantify data or computer
memory
MB
megabytes of memory
N
NBS
National Bureau of Standards
NI-DAQ
National Instruments driver software for DAQ hardware
NMRR
normal mode rejection ratio—a measure of an instrument’s ability to
reject a signal applied directly to the differential inputs of the
instrument
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.
O
overrange
a segment of the input range of an instrument outside of the normal
measuring range. Measurements can still be made, usually with a
degradation in specifications