Teledyne-lecroy STX M6-1 SAS_SATA Protocol Analyzer User Manual Manual de usuario Pagina 93

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 Sierra M64 SAS/SATA Protocol Analyzer User Manual 91
Easy Mode (PreDefined Setups)
LeCroy Corporation
Pre-Trigger
You can set the amount of data to capture before and after the trigger, as a
percentage of pretrigger, between 1% and 99%. Position the pretrigger slider to a
percentage. This feature allows the evaluation of bus activity leading up to and after the
triggering event. Figure 2.65 illustrates the operation of pretrigger in data memory.
Pretrigger data is capture of the specified percentage of data prior to the triggering
event. It cannot be guaranteed and may be 0. This can occur when the triggering event
occurs before storing the required amount of pretrigger event data. In such a case, the
data display shows fewer than the specified data points prior to the triggering event.
Figure 2.65: Pre-Trigger Example, 20% Pre-Trigger
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