Glossary
SC-2311 User Manual
G-14
ni.com
sensor
a device that responds to a physical stimulus (heat, light, sound, pressure,
motion, flow, and so on), and produces a corresponding electrical signal
settling time
the amount of time required for a voltage to reach its final value within
specified limits
signal conditioning
the manipulation of signals to prepare them for digitizing
SNR
signal-to-noise ratio—the ratio of the overall rms signal level to the rms
noise level, expressed in decibels
software trigger
a programmed event that triggers an event such as data acquisition
software triggering
a method of triggering in which you simulate an analog trigger using
software. Also called conditional retrieval.
source impedance
a parameter of signal sources that reflects current-driving ability of voltage
sources (lower is better) and the voltage-driving ability of current sources
(higher is better)
SS
simultaneous sampling—a property of a system in which each input or
output channel is digitized or updated at the same instant
SSR
solid-state relay
STARTSCAN
start scan signal
STC
system timing controller
strain gauge
a thin conductor, which is attached to a material, that detects stress or
vibrations in that material. The resistance of the conductor is a function of
the applied force.
switchless device
devices that do not require DIP switches or jumpers to configure resources
on the devices—also called Plug and Play devices
synchronous
(1) hardware—a property of an event that is synchronized to a reference
clock (2) software—a property of a function that begins an operation and
returns only when the operation is complete
system noise
a measure of the amount of noise present in an analog circuit or when the
analog inputs are grounded
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