HP 54540 Series - Page 105

Trigger
Glitch Trigger Mode
When Present Softkey
The when present softkey sets the condition that must be satisfied to
generate a trigger event. Ifwhen present > is selected, a trigger is
generated when the glitch is true longer than a specified width. If when
present < is selected, a trigger is generated when the glitch is true less
than a specified width. The current selection is highlighted in inverse video.
Width Softkey
The width softkey sets the width of the pulse to generate the trigger on.
The oscilloscope can trigger glitches as narrow as 1 ns, even though the
width selections are from 2.5 ns to 160 ms.
Holdoff Softkey
The holdof€ softkey sets the holdoff value. Holdoff disables the trigger
circuit for a selectable time period after the trigger event. Holdoff is selected
in 20-ns time increments, from 40 ns to 320 ms.
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