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Chapter 4 Theory of Operation
© National Instruments Corporation 4-9 NI PXI-4224 User Manual
Table 4-2 provides more information about each of the timing signals
available on the PXI trigger bus. For more detailed timing signal
information, refer to Appendix B, Timing Signal Information.
Table 4-2. PXI Trigger Bus Timing Signals
Signal Direction Description
Availability
on PFI 0
SMB
Availability
on PXI
Trigger Bus
AI START TRIG Input
Output
This trigger is the source for the
analog input digital start trigger,
which is the trigger that begins
an acquisition.
This trigger sends out the actual
analog input start trigger.
Input
Output
Input
Output
AI PAUSE TRIG Input This signal can pause and resume
acquisition.
Input Input
AI SAMPLE CLK
TIMEBASE
Input This timebase provides the master
clock from which the sample
clocks are derived.
Input Input
AI HOLD
COMPLETE
Output This signal is output when the
analog signal to be converted by
the ADC has been held.
Not
available
Not
available