National Instruments 1142 用户手册
Glossary
© National Instruments Corporation
G-5
R
rms
root mean square
rolloff
the ratio that a system attenuates signals in the stopband with respect to the
passband, usually defined in decibels per octave
passband, usually defined in decibels per octave
RSVD
reserved signal/bit
S
s
seconds
S/s
samples per second—used to express the rate at which a DAQ device
samples an analog signal
samples an analog signal
sample
an instantaneous measurement of a signal, normally using an
analog-to-digital convertor in a DAQ device
analog-to-digital convertor in a DAQ device
sample rate
the number of samples a system takes over a given time period, usually
expressed in samples per second
expressed in samples per second
scan
a collection of samples, usually with each sample coming from a different
input channel
input channel
SCAN CLK
scan clock signal
SCXI
Signal Conditioning eXtensions for Instrumentation
SCXIbus
located in the rear of an SCXI chassis, the SCXIbus is the backplane that
connects modules in the same chassis to each other
connects modules in the same chassis to each other
SER CLK
serial clock signal
SER DAT IN
serial data in signal
SER DAT OUT
serial data out signal
SLOT 0 SEL
slot 0 select signal
SPI CLK
serial peripheral interface clock signal
stopband
the portion of a frequency spectrum blocked by a filter