ADLINK PCIe-9852 - Manual (Page 27)

Operations 17
PXIe-9852
The PCIe-9852 requires a trigger to implement acquisition of data.
Configuration of triggers requires identification of trigger
source. The PCIe-9852 supports internal software trigger,
external digital trigger, and analog trigger.
3.3.1 Software Trigger
The software trigger, generated by software command, is
asserted immediately following execution of specified function
calls to begin the operation.
3.3.2 External Digital Trigger
An external digital trigger is generated when a TTL rising edge
or falling edge is detected at the SMA connector TRG IN on the
front panel. As shown, trigger polarity can be selected by soft-
ware. Note that the signal level of the external digital trigger
signal should be TTL compatible, and the minimum pulse width
20 ns.
Figure 3-4: External Digital Trigger
Pulse Width > 20ns Pulse Width > 20ns
Rising Edge Trigger Event Falling Edge Trigger Event