TDS3000 Series User Manual
Glossary–1
Glossary
AC Coupling
A mode that blocks the DC component of a signal but passes the
dynamic (AC) component of the signal. Useful for observing an
AC signal that is normally riding on a DC signal.
Acquisition
The process of sampling signals from input channels, digitizing
the samples, processing the results into data points, and
assembling the data points into a waveform record. The
waveform record is stored in memory.
Active Cursor
The cursor that moves when you adjust the general purpose
knob. The @ readout on the display shows the position of the
active cursor.
Aliasing
A false representation of a signal due to insufficient sampling of
high frequencies or fast transitions. A condition that occurs
when an oscilloscope digitizes at an effective sampling rate that
is too slow to reproduce the input signal. The waveform
displayed on the oscilloscope may have a lower frequency than
the actual input signal.
Application Module
A small module that you plug in to the front panel to add
capabilities to your oscilloscope. You can use up to four
application modules at one time.
Application Package
An optional package that may include an application module, a
firmware upgrade, and manuals that add capabilities to your
oscilloscope.
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