Glossary
TDS 500B, TDS 600B, & TDS 700A User Manual
Glossary–11
Timeout trigger
A trigger mode in which triggering occurs if the oscilloscope does NOT find
a pulse, of the specified polarity and level, within the specified time period.
Trigger
An event that marks time zero in the waveform record. It results in acquisi-
tion and display of the waveform.
Trigger level
The vertical level the trigger signal must cross to generate a trigger (on edge
trigger mode).
Vertical bar cursors
The two vertical bars you position to measure the time parameter of a
waveform record. The oscilloscope displays the value of the active (move-
able) cursor with respect to the trigger and the time value between the bars.
Waveform
The shape or form (visible representation) of a signal.
Waveform interval
The time interval between record points as displayed.
XY format
A display format that compares the voltage level of two waveform records
point by point. It is useful for studying phase relationships between
two waveforms.
YT format
The conventional oscilloscope display format. It shows the voltage of a
waveform record (on the vertical axis) as it varies over time (on the
horizontal axis).
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