PCI-DAS6030 & PCI-DAS6032 User's Guide
Functional Details
25
Gate Below
Data acquisition is enabled whenever ATRIG goes below the THRESH_LO level. Acquisition is suspended
whenever the ATRIG signal goes above the THRESH_LO level. This is a level-sensitive gating mode.
Figure 22. Gate Below
Gate Negative Hysteresis
Data acquisition is enabled whenever ATRIG goes above the THRESH_HI level. Acquisition is suspended
whenever the ATRIG signal goes below the THRESH_LO level. The hysteresis level is set by THRESH_LO.
This is a level-sensitive gating mode.
Figure 23. Gate Negative Hysteresis
Trigger
Acquired Data
+2
-2
+1
0
-1
Thresh_LO
+1
0
-1
-2
Trigger
Acquired Data
+2
-2
+1
0
-1
Thresh_HI
+2
+1
0
-1
Thresh_LO
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