ADLINK PXI-2208 - Manual (Page 54)

42 Operation Theory
Trigger Modes
The DAQ-/DAQe-/PXI-2204/2205/2206/2208 card provides four
trigger sources (internal software trigger, external analog trigger,
and digital trigger sources, and SSI trigger signals). You must
select one of them as the source of the trigger event. A trigger
event occurs when the specified condition is detected on the
selected trigger source. For example, a rising edge on the external
digital trigger input. Refer to section 4.6 for more information on
SSI signals.
There are four trigger modes (pre-trigger, post-trigger, middle-trig-
ger, and delay-trigger) working with the four trigger sources to ini-
tiate different scan data acquisition timing when a trigger event
occurs. They are described in the following sections. For informa-
tion on trigger sources, refer to section 4.5.