B&K Precision 2542B Uživatelský manuál stáhnout pdf (Strana 68)

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.

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B&K Precision 2542B Uživatelský manuál Strana 68