AMETEK Lx Series II Programming Manual - Manual (Page 151)

Programming Manual Lx \ Ls Series II
147
6.9.4 Pre-event and Post-event Triggering
The range for this offset is 4096 to 2E9 points. As shown in the following figure, when the offset is
negative, the values at the beginning of the data record represent samples taken prior to the
trigger. When the value is 0, all of the values are taken after the trigger. Values greater than zero
can be used to program a delay time from the receipt of the trigger until the data points that are
entered into the buffer are valid.
(Delay time = Offset Sample period)
4096 DATA POINTS
4096 DATA POINTS
4096 DATA POINTS
Time
Acquisition
Trigger
Moment
Offset =
0 to 2^9
Offset = - 4096
Offset = - 2048
Offset = 0
4096 DATA POINTS
Figure 6-4: Pre- and Post Event Triggering.