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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Video signal trigger is used for oscilloscope triggering on even fields, odd fields, all fields, all lines, line number/line #. When Normal Polarity is selected the trigger always occurs on negative-going sync pulses. If the video signal has positive-going sync pulses, use the inverted Polarity selection.
The animated picture below shows a video signal trigger oscillogram on odd field and even field:
The picture below demonstrates a video signal trigger oscillogram on line number/line #/