User guide

34 Operation Theory
3.4 Trigger Sources
In addition to the internal software trigger, the PCI/PXI-9816/26/46
also supports external analog triggers, external digital triggers,
PXI_STAR triggers, PXI Trigger Bus[0..7] and SSI bus.. You can
configure the trigger source by software command. Please refer to
Figure 3.7 for trigger architecture.
Figure 3-7: PCI/PXI-98x6 Trigger Architecture
3.4.1 Software Trigger
Software trigger is generated by software command. The trigger
asserts right after executing specified function calls to begin the
operation.
Trigger Source Mux
Analog
Trigger
PXI Interface
PXI_STAR
PXI Trigger Bus[0:7]
Software Trigger
Analog CH0
Analog CH1
Analog TRG
Circuit
TRG IO
SMB Connector
Digital Trigger Input
Trigger
Decision
Trigger Output Mux
TRG IO
SMB Connector
PXI Interface or SSI
SSI_TRIG1
SSI_TRIG2
SSI_START_OP
To Internal
Circuit
Analog CH2
Analog CH3
Digital Trigger Output
SSI Bus
(Only available in
PCI version)