NI PXI-4204, Руководство пользователя

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Glossary
© National Instruments Corporation G-7 NI PXI-4204 User Manual
R
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 16-bit resolution, one part in
65,536 resolution, and 0.0015% of full scale.
rms root mean square—the square root of the average value of the square of the
instantaneous signal amplitude; a measure of signal amplitude
RTSI bus real-time system integration bus—the NI timing bus that connects DAQ
devices directly, 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 SS/H, this counter counts the
output of the scan clock and hence the number of scans.
scan one or more analog or digital input samples. Typically, the number of input
samples in a scan is equal to the number of channels in the input group. For
example, one pulse from the scan clock produces one scan which acquires
one new sample from every analog input channel in the group.
scan clock the clock controlling the time interval between scans
scan interval controls how often a scan is initialized. The scan interval is regulated by
AI SAMP CLK.
SCXI Signal Conditioning eXtensions for Instrumentation—the NI product line
for conditioning low-level signals within an external chassis near sensors
so only high-level signals are sent to DAQ devices in the noisy PC
environment