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Setup and Hold Trigger
A setup/hold trigger occurs when a data signal changes state inside of the user specified setup and
hold times relative to the clock. When you use setup/hold triggering, you define:
 The channel containing the logic input (the data source) and the channel containing the clock
(the clock source)
 The direction of the clock edge to use
 The clocking level and data level that the instrument uses to determine if a clock or data
transition has occurred
 The setup and hold times that together define a time range relative to the clock
Data that changes state within the setup/hold violation zone triggers the instrument. The following
figure shows how the setup and hold times that you choose position the violation zone relative to
the clock.
Setup/hold triggering uses the setup/hold violation zone to detect when data is unstable too near
the time it is clocked. Each time trigger holdoff ends, the instrument monitors the data and clock
sources. When a clock edge occurs, the instrument checks the data stream it is processing (from
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