Teledyne LeCroy Merlin - Users Manual - Manual (Page 152)

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Merlin Protocol Analyzer User’s Manual CATC SW Version 2.0
Example - If you enter xxxxxx01 into row 0 and
11xxxxxx into row 4, it means 'Look for the pattern
xxxxxx01 xxxxxxxx xxxxxxxx xxxxxxxx
11xxxxxx.'
Searching for Hexadecimal Patterns
The columns marked Match and Mask allow you
to specify a pattern in hex. You enter the pattern
you want to match in the column marked Match,
and enter the mask in the column marked Mask. The Mask column allows
you to specify which bits you are searching for.
Example - A Match of 03 and a Mask of '0F' tells Merlin that you are
looking for the hex pattern of 03 occurring in the last four bits of the pattern.
If you enter these values in the Match and Mask columns, the Bitmask
section will automatically display the equivalent bit values: XXXX0011.
Union, Intersection, and Exclusion
If you select multiple events, you will need to use the options Union or
Intersection to conduct the search.
Union is used to search for any selected event: "Find x or y." Union lets
you tell the analyzer to search the trace for any of any of the selected items.
Intersection is used to search for all selected events: "Find x and y."
Intersection lets you tell the analyzer to search the trace for any packet
having all of the selected events.
Exclusion is used to exclude selected traffic from the trace. Exclusion is
used with Union and Intersection --i.e., you select Exclusion with Union or
Intersection.
• Exclusion + Union -- tells Merlin to exclude packets with any of the specified
events.
• Exclusion + Intersection -- tells Merlin to exclude packets with all of the
specified events.
Using Find
Step 1
Select the display level to be searched from the Search For
box on the left side of the window.
For example, to search through L2CAP messages, select L2CAP. The
display level that you select will affect options presented in the Events
Group box.