Tektronix, Inc. P6240, User Manual

Page: 293 / 321

Glossary
TLS 216 User Manual
Glossary–3
In Timing-Diagram mode, the indicator points to the midpoint between the
HIGH and LOW logic levels for the highest-numbered channel included in
the group.
Coupling
The association of two or more circuits or systems in such a way that power
or information can be transferred from one to the other. The logic scope uses
DC coupling only.
Cursors
Paired markers that you can use to make measurements between two
waveform locations. The logic scope displays the values (expressed in volts
or time) of the position of the active cursor and the distance between the two
cursors.
Cycle area
A measurement of waveform area taken over one cycle. Expressed in
volt-seconds. Area above ground is positive; area below ground is negative.
Cycle mean
An amplitude (voltage) measurement of the arithmetic mean over one cycle.
Cycle RMS
The true Root Mean Square voltage over one cycle.
DC coupling
The coupling mode used by the logic scope to couple both AC and DC
signal components to both the trigger system and the vertical system.
Delay measurement
A measurement of the time between the middle reference crossings of two
different waveforms.
Delay time
The time between the trigger event and the acquisition of data.
Digitizing
The process of converting a continuous analog signal such as a waveform to
a set of discrete numbers representing the amplitude of the signal at specific
points in time. Digitizing is composed of two steps: sampling and quantiz-
ing.
Display system
The part of the logic scope that shows waveform groups, measurements,
menu items, status, and other parameters.
Edge Trigger
Triggering occurs when the logic scope detects the source passing through a
specified voltage level in a specified direction (the trigger slope).