Measurement Computing USB-1608HS-2AO - Manual (Page 22)

USB-1608HS-2AO User's Guide Functional Details
22
Trigger above, edge-sensitive
The acquisition begins the first time the TRIG_IN signal goes above the high threshold (1.0 V). The TRIG_IN
signal must transition from below to above the high threshold to begin the acquisition.
Figure 13. Trigger above, edge-sensitive
Trigger below, edge-sensitive
The acquisition begins when TRIG_IN signal first goes below the low threshold (-1.0 V). A transition from
above to below the threshold is necessary to begin acquisition. The TRIG_IN signal must transition from above
to below the low threshold to begin the acquisition.
Figure 14. Trigger below, edge-sensitive
Acquired data
High threshold
Trigger occurs here
+2
-2
+1
0
-1
Low threshold
Acquired data
+2
-2
+1
0
-1
+2
-2
+1
0
-1
Trigger occurs here
+2
-2
+1
0
-1