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Pause 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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The trigger is made if during the specified period there has been no cross of the input signal with the specified voltage level in the specified direction. Pause report starts when the input signal crosses the specified voltage level in the specified direction.

Pic. 1 Pause trigger algorithm
Pause trigger (or timeout trigger as it’s also called) allows making the pulse packet end synchronization or open-circuit synchronization. The example of it is demonstrated below. This synchronization type is good for the determination of electronic system hang: no signal at the system output which is regulated by the first oscilloscope channel. At the same time you may use the second channel to register a command which has caused the system hang.

Pic. 2 Pause trigger mode (timeout) for ACK-3102 1T PC-based oscilloscope.
Modern ACK-3102 1T PC-based oscilloscope versions have two embedded comparators in the synchronization trigger channel. It significantly broadens the signal research capabilities for users. The availability of two amplitude synchronization levels allows specifying not just a point but the trigger area on the vertical scale of the oscilloscope and therefore determining more difficult signal aperiodicities comparing to the single-level comparator.
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