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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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