Agilent Technologies DP235 Guía de usuario Pagina 112

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Triggering Examples
Single-Machine Trigger Examples
To trigger when expected data does not appear
when requested
1 Go to the timing analyzer's Trigger menu.
2 Define a term called DATA to represent the expected data, the
Edge1 term to represent the chip select line of the remote
device, and the Timer1 term to identify the time limit for
receiving expected data.
You can rename the Edge1 and Timer1 terms to match the problem
domain, for example, to REM_SEL and ACK_TIME.
3 Under Timing Sequence Levels, enter the following sequence
specification:
Find "REM_SEL" Occurs "1" Else on "no state" go to level "1"
TRIGGER on "ACK_TIME > 16.00 ms" Occurs "1" Else on "DATA" go to
level "1"
You will need to start ACK_TIME timer (Timer1) upon entering this
state. You do this using the Timer Control field in the menu for
sequence level 2.
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