Reference
NOTE. For best results, choose Normal trigger mode when using long holdoff
settings (10 ms or greater).
Logic Triggers
Edge triggering can trigger on most signals, and is the default trigger type. Edge
triggering sets the oscilloscope to trigger (acquire signal data) when a signal meets
aspecified signal slope and a single voltage-threshold condition.
However, there are times when you need to trigger the oscilloscope on a more
complex signal, or when two signals meet a condition to troubleshoot a problem.
These problems include a pulse that is too narrow or wide, and situations in which
one signal is true when a second signal transitions from low to high.
Logic and Pulse triggering lets you further qualify the trigger conditions by
adding parameters such as pulse width, delta time, logical comparisons of two
signals, and dual threshold levels.
TDS3000C Series Oscilloscope User Manual 97
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