
7 Analog Modules Synchronization
256 System Reference, January 2001
Figure 120 Trigger Signal Edge Placement when TRGL Is Set to Trigger Line
Length m
• Program the edge location of the trigger signal before
the beginning of the tester period by the trigger line
length.
The TRGL command treats the beginning of the tester
period as the reference point. Accordingly, if you
program the edge timing of the trigger before the begin-
ning of the tester period by the trigger line length, the
trigger line length is virtually zero. In this case, you do
not have to use the TRGL command because the default
value of TRGL is zero. As well as the trigger line length
setting by the TRGL command, the trigger edge setting
means the system compensates the trigger timing to
the analog module for removing the uncertainty auto-
matically. The following is the timing chart.
Trigger edge setting
Trigger
@digital pin
Trigger
@trigger input pin
of analog module
Trigger line length
Analog signal measurement
@analog module pogo pin
Trigger-to-signal delay
Tester period
Tester period
Beginning of
Tester Period
TRGL = Trigger line length
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