National Instruments NI 447 Series, Руководство пользователя

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Glossary
© National Instruments Corporation G-11 NI 447X User Manual
R
relative accuracy a measure in LSB of the linearity of an ADC. It includes all non-linearity
and quantization errors. It does not include offset and gain errors of the
circuitry feeding the ADC.
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 12-bit resolution, one part in
4,096 resolution, and 0.0244% of full scale.
rise time the difference in time between the 10% and 90% points of the step response
of a system
rms root mean square—the square root of the average value of the square of the
instantaneous signal amplitude; a measure of signal amplitude
RSE See SE.
RTSI bus real-time system integration bus—the NI timing bus that connects DAQ
devices directly, by means of connectors on top of the devices, for precise
synchronization of functions
S
s seconds
S samples
S/s samples per second—used to express the rate at which a DAQ device
samples an analog signal
sample counter the clock that counts the output of the channel clock, in other words, the
number of samples taken. On devices with simultaneous sampling, this
counter counts the output of the scan clock and hence the number of scans.
SE single-ended—a term used to describe an analog input that is measured
with respect to a common ground
self-calibrating a property of a DSA device that has an extremely stable onboard reference
and calibrates its own A/D and D/A circuits without manual adjustments
by the user