Справочник Пользователя для National Instruments NI 781xR
Glossary
G-6
© National Instruments Corporation
S
s
Seconds.
S
Samples.
S/s
Samples per second—Used to express the rate at which a DAQ board
samples an analog signal.
samples an analog signal.
signal conditioning
The manipulation of signals to prepare them for digitizing.
slew rate
The voltage rate of change as a function of time. The maximum slew rate
of an amplifier is often a key specification to its performance. Slew rate
limitations are first seen as distortion at higher signal frequencies.
of an amplifier is often a key specification to its performance. Slew rate
limitations are first seen as distortion at higher signal frequencies.
T
THD
Total harmonic distortion—The ratio of the total rms signal due to
harmonic distortion to the overall rms signal, in decibel or a percentage.
harmonic distortion to the overall rms signal, in decibel or a percentage.
thermocouple
A temperature sensor created by joining two dissimilar metals. The
junction produces a small voltage as a function of the temperature.
junction produces a small voltage as a function of the temperature.
TTL
Transistor-transistor logic.
two’s complement
Given a number x expressed in base 2 with n digits to the left of the radix
point, the (base 2) number 2n – x.
point, the (base 2) number 2n – x.
V
V
Volts.
VDC
Volts direct current.
VHDCI
Very high density cabled interconnect.
VI
Virtual Instrument—Program in LabVIEW that models the appearance and
function of a physical instrument.
function of a physical instrument.
V
IH
Volts, input high.
V
IL
Volts, input low.