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Edge trigger
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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Edge triggering is performed when the signal level of synchronization source passes through the specified voltage level in the prescribed direction.
Slope control element is specified by the edge (rising or falling) where the trigger point is researched. There are trigger types of this kind available as follows:
 - on the rising edge  - on the falling edge  - on the rising and falling edge
The picture below shows the signal oscillogram with falling edge triggering. The trigger moment in the top of the window is displayed with the marker with T letter:
The picture below shows the signal oscillogram with rising edge triggering:
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