Tektronix CSA7154, User Manual

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CSA7000 Series, TDS7000 Series, & TDS6000 Series Instruments User Manual
Glossary- 1
Glossary
AC coupling
A type of signal transmission that blocks the DC component of a signal but
uses the dynamic (AC) component.
Accuracy
The closeness of the indicated value to the true value.
Acquisition
The process of sampling signals from input channels, digitizing the samples
into data points, and assembling the data points into a waveform record. The
waveform record is stored in memory. The trigger marks time zero in that
process.
Acquisition interval
The time duration of the waveform record divided by the record length.
Except in equivalent time, the instrument acquires one data point for every
acquisition interval.
Aliasing
A false representation of a signal due to insufficient sampling of high
frequencies or fast transitions. A condition that occurs when an instrument
digitizes at an effective sampling rate that is too slow to reproduce the input
signal. The waveform displayed on the instrument may have a lower
frequency than the actual input signal.
Amplitude
The High waveform value less the Low waveform value.
AND
A logic (Boolean) function in which the output is true when and only when
all the inputs are true. On the instrument, a trigger logic pattern and state
function.
Analog-to-Digital Converter
A device that converts an analog signal to a digital signal.