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Trigger level
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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Trigger level is threshold voltage value the exceeding of which leads to a registration trigger signal forming in digital oscilloscopes.
Trigger level is a registrable parameter and set in voltage value, V. Trigger level is displayed as a horizontal line. In the majority of scope models this trigger level horizontal line is replaced by a short arrow indicator or horizontal marker with T letter to the right or to the left according to the coordinate scale of the oscillogram window.
The picture below shows the sine signal oscillogram, 500 mVpp. The trigger level is displayed as a horizontal marker with T letter and brightened with a horizontal line, set on 200 mV level. Trigger position coincides with the trigger level of 200 mV excess by the input signal and is displayed with a vertical marker with T letter.
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