National Instruments PCI-6251 User Manual

7-26 | ni.com
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)
• AI Sample Clock (ai/SampleClock)
• AI Convert Clock (ai/ConvertClock)
• AO Sample Clock (ao/SampleClock)
• DI Sample Clock (di/SampleClock)
• DO Sample Clock (do/SampleClock)
• PXI_STAR
• Change Detection Event
• Analog Comparison Event
In addition, Counter 1 Internal Output or Counter 1 Source can be routed to Counter 0 Gate.
Counter 0 Internal Output or Counter 0 Source can be routed to Counter 1 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> or RTSI <0..7> 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
• Analog Comparison Event

National Instruments PCI-6251 Specifications

General

Brand	National Instruments
Model	PCI-6251
Category	I/O Systems
Language	English