Glossary
©NationalInstruments Corporation G-17 NI5102 User Manual
SC_TC scan counter terminal count signal
SCXI Signal Conditioning eXtensions for Instrumentation—the NI product
linefor conditioning low-level signals within an external chassis near
sensors so only high-levelsig nals are sent to DAQdevices in the noisy
PC environment
SE single-ended—a term used to describe an analog input that is measured
with respect to a common ground
self-calibrating aproperty of a DAQ device that has an extremely stable onboard reference
andcalibrates its own A/D and D/A circuits without manual adjustments by
the user
settling time the amount of time required for a voltageto reach its final value within
specifiedlimits
shared memory seedual-access memory
signal divider performing frequencydivision on an external signal
SIMM singlein-line memory module
Slot0Sel slot0 select signal
SMB a type of miniature coaxial signal connector
SNR signal-to-noise ratio—the ratio of the overall rms signal levelto the rms
noiselevel, expressed in decibels
softwaretrigger aprogrammed event that triggers an event such as data acquisition
softwaretriggeri ng am ethod of triggering in which you simulate an analog trigger using
software.Also called c onditional retrieval
sourcei mpedance aparameter 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)
SPICLK SerialPeripheral Interface Clock signal
StartTrigger start trigger signal
STC system timing controller