Glossary
© National Instruments Corporation
G-7
Plug and Play ISA
a specification prepared by Microsoft, Intel, and other PC-related
companies that will result in PCs with plug-in boards that can be fully
configured in software, without jumpers or switches on the boards
port
(1) a communications connection on a computer or remote controller;
(2) a digital port, consisting of four or eight lines of digital input and/or
output
PTC
positive temperature coefficient
R
reading rate
the rate, in hertz, at which each sample is updated
resolution
the smallest signal increment that can be detected by a measurement
system. Resolution can be expressed in bits, in proportions, or in
percent of full scale. For example, a system has 24-bit resolution, one
part in 2
24
=16777216 resolution, and 5.96 x 10
-6
% of full scale.
rms
root mean square—the square root of the average value of the square of
the instantaneous signal amplitudes; a measure of signal amplitude
RSVDx
reserved
RTD
resistance temperature detector. A metallic probe that measures
temperature based upon its resistance.
S
s
second—a unit of time
S
sample
S/s
samples per second—used to express the rate at which a NI 4350
samples an analog signal
sigma-delta
technology used for analog to digital conversion
sinter
to cause to become a coherent mass by heating without melting
system noise
a measure of the amount of noise seen by an analog circuit or an ADC
when the analog inputs are grounded
