Teledyne LeCroy PETracer EML Analyzer and Exerciser User Manual - Manual (Page 110)

Chapter 8: Recording Options PETracer EML User Manual
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Recording Type
Recording Type lets you to specify the type of recording you want to make:
• Snapshot: A recording of a pre-determined length. You set the recording length in
the Buffer Size box. Recording begins when you click the Rec button on the toolbar
and ends when the selected buffer size is filled or when you press the Stop button.
• Manual Trigger: A recording that switches between the pre-trigger buffer and the
post-trigger buffer when you push the Trigger button on the front of the Analyzer.
Recording begins when you select Start in the application. Pressing the Trigger
button causes the Analyzer to begin to finish recording. Recording continues until
the post-trigger buffer has been filled. You can also end the recording by pressing
the Stop button in the application.
• Event Trigger: A recording that switches between the pre-trigger buffer and the
post-trigger buffer when it is triggered by an event in the CATC Trace. An Event
Trigger begins when you select Start in the application and ends when the specified
triggering event occurs in the CATC Trace or you press Stop. If an event triggers the
end of the recording, the Analyzer records a predefined amount of post-trigger data
(specified by Trigger Position and Buffer Size.)
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Note: You can also terminate an Event Trigger recording by pressing the Manual
Trigger button on the front of the Analyzer. When the Manual Trigger button is
pressed, the Analyzer continues to record until the specified post-trigger buffer has
been filled.
Buffer Size
The Buffer Size slide-bar allows you to set the size of the recording buffer.
Note: Size selection is per direction. For example, selecting 32 MB creates two
memory areas of that size.
After you have set the Buffer Size, you must set the Recording type and Trigger position
options. These options determine how the buffer is used.
Note: The Buffer Size slide-bar does not precisely portray the buffer size because
of the way the packets are stored in the Analyzer’s memory.