Tektronix 2212 User Manual page 235

Glossary
AC Coupling
A type of signal transmission that blocks the signal's DC
component but uses the signal's dynamic (AC) component.
Useful for observing an AC signal that is normally riding on
a DC signal.
Accur.acy
The closeness of the indicated value to the true value.
Acquisition
The process of sampling signals from input channels, digi-
tizing the samples, processing the resulting samples into
data points, and assembling the data points into a waveform
record. The waveform record is stored in memory.
Acquisition Sample Interval
The time between each sample the instrument acquires from
the i.nput signal.
Active cursor
The cursor that moves when you turn the Cursor POSITION
knob.
Aliasing
A false representation of the signal's waveform due to insuf-
ficient sampling of high frequencies or fast transitions. That
is, a condition that occurs when a digitizing oscilloscope
digitizes at an effective sampling rate that is too slow to re-
produce the input signal. The waveform displayed on the
oscilloscope may have a lower frequency than the actual
input signal. Can cause excessive measurement and other
errors.
Amplitude
The High waveform value less the Low waveform value.
2212 User Manual
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