Teledyne LeCroy PETracer EML Analyzer and Exerciser User Manual - Manual (Page 71)

PETracer EML User Manual Chapter 4: Software Overview
LeCroy Corporation
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4.9 Recording Multi-Segmented CATC Traces
If Save as Multisegment trace is enabled, PETracer divides the CATC Trace as it
records it into segments and stores them on the host's hard drive.
This option is useful for very large recordings and for host PCs with limited memory. In
the latter case, multi-segmenting gives a PC with limited memory a way to open
recordings that are otherwise too large to open.
The only downside to multi-segmenting is that limits the scope of reports such as
Traffic Summary, Bus Utilization, and Error Summary to each of the segments. You
cannot perform summary statistics on the full recording.
The default segment size is 10 MB. Before attempting large recordings, it is
recommended that you play with this number to see what value best suits your needs.
How to Create a Multisegment Recording
To create a Multisegment recording:
Step 1 Select Setup > Recording Options to open the Recording Options
dialog at the General tab. Click Switch to Advanced Mode.
Step 2 Check the box marked Save as Multisegment trace.
Step 3 In the box marked MB Segments, enter a value of 4 to 128 MB.
What Gets Created
Multisegmenting produces an index file and segmented CATC Trace files. The default
name of the index file is data.pem.
The index file and the segmented CATC Trace files are stored in a directory named after
the index file. The directory is named data_pem_files. Below this directory additional,
sequentially numbered sub-directories (up to 100,000) hold the segmented CATC Trace
files. These sub-directories bear simple numerical names: 00000 to 00999. Each of these
subdirectories can hold up to 100 sequentially numbered segment files. Collectively, the
entire directory structure can hold up to 10 million files.