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Scope Multimeter Operations
Operations
Trigger Controls
Triggering allows you to set the scope so that it begins displaying a trace once predetermined
signal conditions, or triggers, are met. Triggering produces a much more stable waveform. The
trace always begins at the trigger point, so the image does not appear to flicker or drift as it
updates. There are three modes of triggering:
•
Auto—this automatic triggering mode is the default setting that either constructs the trace
independently of the trigger point or begins the trace as it crosses the trigger.
•
Manual—often called normal mode, this option allows the user to set a triggering point and the
trace does not begin to display until the signal reaches the trigger point.
•
None—often called Histogram, this is a “no triggering” mode that is automatically engaged
whenever a timebase, or sweep, between 2 seconds and 20 seconds is selected.
Triggering
is prevented at slower sweep rates to eliminate screen update delays caused by the way
VERDICT buffers data in order to capture rapidly occurring signal glitches.
The trigger point is indicated by a plus sign (+) on the scope grid. The plus sign can be dragged
across the grid with your finger or the stylus to roughly position it. The trigger controls allow you to
precisely position the trigger.