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scan rate

reciprocal of the scan interval

SCANCLK

scan clock signal

SCSI

small computer system interface—a high-speed, peripheral-connect 
interface primarily used for hard disks, CD-ROM drives, tape drives, 
and other mass-storage devices to PCs

settling time

the amount of time required for a voltage to reach its final value within 
specified limits

SFDR

spurious-free dynamic range—the dynamic range from full-scale 
deflection to the highest spurious signal in the frequency domain

SI2

sample interval counter

signal conditioning

the manipulation of signals to prepare them for digitizing

SISOURCE

SI counter clock signal

SOURCE

source signal

STARTSCAN

start scan signal

system noise

a measure of the amount of noise seen by an analog circuit or an ADC 
when the analog inputs are grounded

TC

terminal count—the ending value of a counter

t

d

delay time

t

gh

gate hold time

t

gsu

gate setup time

t

gw

gate pulse width

t

out

output delay time

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