[SOLVED] O scope single sweep trigger event

[ParkerMike]

When measuring logic switching transitions in auto trigger mode on an O-scope won't tell you where the trigger event starts? only in single sweep mode it tell you where the trigger event is?

Each O-scope is different using the single sweep mode, some indicate a "T" or a "DOT" on the O scope to tell you this is where the trigger event starts

When using the Auto mode or Normal mode, using the external trigger won't tell you on the o-scope where the event trigger started?

 

[betwixt]

It does tell you but in auto mode the event is overwritten by the next sweep. Auto (Normal) mode is better for displaying repeating waveforms where it can trigger at a particular point in the cycle, what you actually see is a static image of many cycles superimposed.

Single sweep mode is best for displaying single events. Even better is to use a logic analyzer which is the ideal instrument for capturing logic events.

Brian.