Chapter 7 Counters
© National Instruments 7-43 X Series User Manual
Counter n Gate Signal
The Counter n Gate signal can perform many different operations
depending on the application including starting and stopping the counter,
and saving the counter contents.
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
• 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.
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