LeCroy USB Protocol Suite Advisor T3, User Manual

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USB Protocol Suite User Manual Chapter 10: Recording Options
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10.1.5 Recording Scope (Voyager and Advisor T3)
Select either:
• Conventional Single Buffer Recording: Select Buffer Size (see below). The
analyzer limits the data amount captured to the selected buffer size. Use the
Trigger Position slider (see below) to control the data amounts captured pre-trigger
and post-trigger.
• Spooled Recording: Enter Maximum Disk Usage as an integer in gigabytes. The
spooled recording mode automatically stops the recording when the size of the
capture meets the Maximum Disk Usage value. The analyzer begins recording data
to the analyzer memory when the record button is pressed. The entire analyzer
memory (2 GB or 4 GB) is used to buffer data while simultaneously uploading the
trace file to an attached storage device.
Set Recording Size Limits . If you use Snapshot, you can optionally use Record for
an elapsed time or Record a number of megabytes.
If you use Manual Trigger or Event Trigger, you can optionally use the
Until Triggered, plus options to enter post-trigger limits by megabytes or
elapsed time. These options allow you to specify a trigger event to start the recording.
When these options are used, the trigger position slider is not active. The trigger
event is within the first 100 packets. The balance of the memory captures traffic
occurring post trigger.
Note : You can use Snapshot, Manual Trigger, or Event Trigger recording type with either
Recording Scope: Conventional Single Buffer Recording or Spooled Recording.
Note : When capturing SuperSpeed traffic with Spooled Recording, the traffic rate may
overflow the system's ability to upload data to disk. In the event of overflow, the analyzer
stops the recording automatically, even if the trigger event has not yet occurred. The
analyzer does not drop data or leave gaps in the recording. Instead, it automatically
uploads all the traffic stored in memory. You must make sure that the traffic being
recorded does not overrun the buffer in this mode, by either adjusting the actual data
transmissions between the host and device, or by adding filters to the analyzer recording
to reduce the quantity of data per second that the analyzer is capturing and uploading to
the Analyzer PC.
Note : In both Spooled Recording and Conventional Single Buffer Recording, when large
captures are made, the application automatically segments large traces into 512-MB
segments. The spooled captures are stored in the USB Protocol Suite directory and are
numbered using the analyzer serial number and a 0 to N numeric sequence.