User Manual

Basic Operation

display will flash, indicating that the oscilloscope is force

triggered.

When you press the SINGLE key, the oscilloscope will fill the

pre-trigger buffer, and continue to flow data through the

pre-trigger buffer until the Auto trigger overrides the search

and forces a trigger. At the end of the trace, the oscilloscope

will stop and display the results.

Normal mode

Use Normal trigger mode for low repetitive-rate signals or

when Auto trigger is not required.

In Normal mode the oscilloscope must fill the pre-trigger

buffer with data before it will begin searching for a trigger

event. While searching for the trigger, the oscilloscope

overflows the pre-trigger buffer; the first data put into the

buffer is the first pushed out.

When the trigger event is found, the oscilloscope will fill the

post-trigger buffer and display the results. If the acquisition

was initiated by RUN/STOP, the process repeats. If the

acquisition was initiated by SINGLE, then the acquisition

stops.

In either Auto or Normal mode, the trigger may be missed if

the oscilloscope’s pre-trigger buffer is not full yet.