Teledyne LeCroy Merlin Mobile - Users Manual - Manual (Page 75)

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Merlin Mobile User’s Manual CATC SW Version 2.0
The Recording Type option determines how this buffer is used. Although
there are 512 megabytes of physical memory in the analyzer, the efficiency
of the recording ranges from 2:1 to 4:1 ratios of physical memory to actual
Bluetooth traffic. Shorter Bluetooth packets yield a less efficient recording.
The non-traffic portion of physical memory is utilized for control and timing
information.
Note The scale is not linear and affords more granularity in the smaller buffer sizes.
Trigger Position
The Trigger Position slide bar sets the amount of
post-trigger recording that Merlin Mobile will
perform. It also allows adjustment of the location of
the trigger within the defined buffer. You can adjust
the Triggering Position between 1 and 99%
post-Trigger. Trigger Position is available only when Manual Trigger or
Event Trigger is selected as Recording type.
As an example, if the buffer size is set to 16MB, then for the following
Trigger Position settings, the amount of pre- and post-Trigger data is
• 95% post-triggering: 0.8MB pre-trigger, 15.2MB post-trigger
• 75% post-triggering: 4MB pre-trigger, 12MB post-trigger
• 50% post-triggering: 8MB pre-trigger, 8MB post-trigger
• 25% post-triggering: 12MB pre-trigger, 4MB post-trigger
• 5% post-triggering: 15.2MB pre-trigger, 0.8MB post-trigger
Note When a Trigger occurs, recording continues until the post-Trigger amount of the
buffer is filled.
6.4 Recording Options - Piconet
The Recording Options dialog box has two pages for configuring how
Merlin Mobile records Bluetooth traffic: Piconet, which configures piconet
recording sessions, and Inquiry which configures inquiry recording
sessions.