Teledyne LeCroy Inspector - Users Manual - Manual (Page 27)

CATC CATC Inspector User’s Manual Version 2.31
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4.4.1.1.4.3 Static Events
Any combination of USB Reset, Resume, and Suspend signals can be detected and defined as a
trigger event, by marking the appropriate checkboxes.
4.4.1.1.4.4 Post-Trigger Recording
The user can select the percentage of buffer memory assigned to post-trigger data recording;
available selections are: 95%, 75%, 50%, 25%, 5% and nonstop.
The software uses the analyzer’s full one megabyte memory to capture event-triggered USB
traffic (regardless of any buffer size specified by the user). Following the trigger event, recording
continues until the selected percentage of the total memory contains post-trigger data, and then
stops recording. When recording ceases, the program saves and displays the complete recorded
data stream, or the final megabyte of recording, whichever is less.
Note: The specified percentage is always that of the total memory; if the trigger event occurs
quickly, only a small portion of the buffer might be used for pre-trigger traffic, but the
post-trigger data will always occupy the specified amount of memory.
In nonstop mode, the analyzer continues to record indefinitely. This feature can be used to
generate USB event-decoding signals on the External Interface Breakout Board’s “Data In/Out”
connector for external circuitry.
4.4.1.1.4.5 External Event Trigger
To enable an external trigger, mark the Enable External Trigger checkbox in the Data Recording
Options dialog box.