D.E.V.I.C.E. is an encyclopedia of terms used by manufacturers of test and measurement equipment. T&M Atlantic created this service to better explain the functionality of instruments it offers, and to highlight the latest developments in the world of measurement equipment. We are using such tools as animation to bring words and pictures to life and to create not just an understanding but also an appreciation for technology that goes into the design of every instrument.
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Runt trigger is pulse amplitude triggering which crosses the first threshold level but doesn’t cross the second threshold level before the recross of the first one. Positive and negative pulse triggering is possible.
Pic. 1 Runt trigger algorithm.
The oscillograms in the picture below show abnormal low pulse in the normal digital data stream. Such abnormal pulses can be glitches. However they can be caused by incorrectly designed supply circuits of some digital key as well.
Pic. 2 The example of runt trigger oscillogram for Aktakom ACK-3102 1T PC-based oscilloscope.