Teledyne SierraNet M408, User Manual, Page: 110 / 248

Teledyne LeCroy Trigger Filter Settings in Easy Mode
102 SierraNet M408 User Manual
Figure 2.79: Default Trigger Snapshot Mode Selected
Manual Trigger
In the Manual Trigger mode, the analyzer captures bus traffic continually from when you
use the Manual Trigger until you click the Stop Hardware button (on the analyzer
toolbar), which triggers the analyzer.
Timer
See “Timer” on page 72 for more information.
Defining Patterns
The definition of patterns for the sequential trigger mode is identical to the Pattern
mode, with the following exception:
In sequential triggering mode, all the pattern dialogs display the option for setting to
count the expected number of occurrences on each link. This allows you to specify the
number of times that the pattern must occur before triggering or proceeding in the
trigger sequence.
Figure 2.80: Number of Occurrences
Note:
The Events on each link are counted independently, causing a trigger whenever the number of
occurrences on any link equals the specified value.
Pre-Trigger
You can set the amount of data to capture before and after the trigger, as a
percentage of pre ‐ trigger, between 0% and 100%. Position the pre ‐ trigger slider to a
percentage. This feature allows the evaluation of bus activity leading up to and after the
triggering Event. Figure 2.81: illustrates the operation of pre ‐ trigger in data memory.
Pre ‐ trigger 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 pre ‐ trigger Event data. In such a case, the
data display shows fewer than the specified data points prior to the triggering Event.