Teledyne LeCroy Kibra DDR - Manual (Page 41)

Kibra DDR Protocol Analyzer User Manual 39
Recording Options Setup Teledyne LeCroy
Event Trigger Mode
In Event Trigger mode, the Analyzer triggers whenever any of the events selected for
triggering occurs (an OR condition). The procedure for selecting trigger parameters is
identical to that for selecting capture parameters. All items selected for triggering appear
in the Project Overview pane. This selection also enables the External SMA Trigger
function.
Note: Triggers shown in the Waveform and Listing views have a precision of  clocks during
normal traffic (when Clock Enable is stable).
Buffer Size
The Analyzer Settings tab has the Buffer Size field where you can set the buffer size. The
defaults are one segment of 30MB (or 3.75Msamples). The total size used is automatically
displayed for you. You can use the slider button or click the up or down arrow to change
memory usage for recording trace data. (Minimum size of memory is 1MB. Maximum size
of Memory is 4GB (~512Mega Samples)). It is recommended that you limit the size of the
capture buffer to half of the memory of your host machine to achieve the best
performance.
Trigger Position
This defines the portions of the buffer which are used before and after the trigger. (It does
not apply to snapshot recordings.)
Post-Trigger
You can set the amount of data to capture before and after the trigger, as a 
percentage of pre‐trigger, between 1% and 99%. Position the post‐trigger slider to a
percentage. This feature allows the evaluation of bus activity leading up to and after the
triggering Event. Post‐trigger data is capture of the specified percentage of data after the
triggering Event. It cannot be guaranteed and may be 0. This can occur for example, when
the trigger event occurs and the system halts operation preventing any post trigger data
from being collected. In such a case, the data display shows fewer than the specified data
points after the triggering Event.