Chapter 7
Counters
7-28
ni.com
Routing Counter
n
Source to an Output Terminal
You can route Counter
n
Source out to any output PFI <6..9> or
RTSI <0..7> terminal. All PFIs are set to high-impedance at startup.
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>
•
Input PFI <0..5>
•
ai/ReferenceTrigger
•
ai/StartTrigger
•
ai/SampleClock
•
ai/ConvertClock
•
ao/SampleClock
•
PXI_STAR
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 output PFI <6..9> 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.