ADLINK PXI-9527 - Manual (Page 41)

Operations 31
PXI-9527
Software Trigger
The software trigger, generated by software command, is
asserted immediately following execution of specified function
calls to begin the operation.
External Digital Trigger
An external digital trigger is generated when a TTL rising edge
or a falling edge is detected at the SMB connector on the front
panel. As shown, trigger polarity can be selected by software.
Note that the signal level of the external digital trigger signal
should be TTL compatible, and the minimum pulse width is 65
ns.
Figure 3-5: External Digital Trigger
PXI STAR Trigger
When PXI STAR is selected as the trigger source, the PXI-
9527 accepts a TTL-compatible digital signal as a trigger sig-
nal. The trigger occurs when a rising edge or falling edge is
detected at PXI STAR, with trigger polarity configurable by soft-
ware. The minimum pulse width requirement of this digital trig-
ger signal is 65 ns.
PXI Trigger Bus
The PXI-9527 utilizes PXI Trigger Bus Numbers 0 through 7 to
act as a System Synchronization Interface (SSI). With the inter-
Rising edge trigger
event
Falling edge trigger
event
Pulse Width > 65ns Pulse Width > 65ns