Teledyne LeCroy SAS Suite User Manual - Manual (Page 61)

SASSuite User Manual Version 6.25
LeCroy Corporation
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Triggering/Filtering
The Triggering/Filtering page allows the user to define triggers and filters that can be
simple or quite complex.
The SASSuite application provides a menu-driven interface for building triggers and
filters. The interface prompts you for simple decisions and choices from drop-down
menus. As you make your selections, the script takes shape automatically in the scenario
window. The script is in the form of simple English sentences. You need not understand
any formal scripting language.
Selecting the Triggering/Filtering tab brings up the following screen:
Building
Filters
The top section of the screen, labeled "Global Filtering", is used to build filters. Filters are
definitions of commands or data types that may be present in the traffic, that the user
does NOT want to include in the trace recording. For example, some of the traffic that
takes place in a SAS or SATA link might be simple primitives, and for high-level routines
these primitives simply occupy space in the trace without providing any useful information
to the programmer. Alternatively, a busy link might include traffic between multiple
devices, and if a problem is being experienced with one device, traffic from other devices
simply fills up the analyzer buffer without providing useful information to the user. In such
a case, data recording can be limited to traffic involving only specific devices, although
this capability is accessed in the Channel Settings tab as noted earlier.