Chapter 7
Counters
Routing a Signal to Counter n Gate
Each counter has independent input selectors for the Counter n Gate signal. Any of the following
signals can be routed to the Counter n Gate input:
•
RTSI <0..7>
•
PFI <0..15>
•
AI Reference Trigger (ai/ReferenceTrigger)
•
AI Start Trigger (ai/StartTrigger)
•
AO Sample Clock (ao/SampleClock)
•
DI Sample Clock (di/SampleClock)
•
DI Reference Trigger (di/ReferenceTrigger)
•
DO Sample Clock (do/SampleClock)
•
PXI_STAR
•
PXIe_DSTAR<A,B>
•
Change Detection Event
•
Analog Comparison Event
In addition, a counter's Internal Output or Source can be routed to a different counter's gate.
Some of these options may not be available in some driver software.
Routing Counter n Gate to an Output Terminal
You can route Counter n Gate out to any PFI <0..15>, RTSI <0..7>, or PXIe_DSTARC terminal.
All PFIs are set to high-impedance at startup.
Counter n Aux Signal
The Counter n Aux signal indicates the first edge in a two-signal edge-separation measurement.
Routing a Signal to Counter n Aux
Each counter has independent input selectors for the Counter n Aux signal. Any of the following
signals can be routed to the Counter n Aux input:
•
RTSI <0..7>
•
PFI <0..15>
•
AI Reference Trigger (ai/ReferenceTrigger)
•
AI Start Trigger (ai/StartTrigger)
•
PXI_STAR
•
PXIe_DSTAR<A,B>
•
Analog Comparison Event
•
Change Detection Event
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