Counter Timing Signals; Counter N Source Signal - National Instruments X Series User Manual

Chapter 7 Counters
For information about connecting counter signals, refer to the
section.

Counter Timing Signals

X Series devices feature the following counter timing signals:
•

Counter n Source Signal

• Counter n Gate Signal
• Counter n Aux Signal
• Counter n A Signal
• Counter n B Signal
• Counter n Z Signal
• Counter n Up_Down Signal
• Counter n HW Arm Signal
• Counter n Sample Clock Signal
• Counter n Internal Output Signal
• Counter n TC Signal
• Frequency Output Signal
Note All counter timing signals can be filtered. Refer to the
Chapter 8, PFI, for more information.
In this section, n refers to the X Series Counter 0, 1, 2, or 3. For example, Counter n Source refers
to four signals—Counter 0 Source (the source input to Counter 0), Counter 1 Source (the source
input to Counter 1), Counter 2 Source (the source input to Counter 2), or Counter 3 Source (the
source input to Counter 3).
Each of these signals supports digital filtering. Refer to the
for more information.
Counter n Source Signal
The selected edge of the Counter n Source signal increments and decrements the counter value
depending on the application the counter is performing. Table 7-8 lists how the terminal is used
in various applications.
Table 7-8. Counter Applications and Counter n Source
Application
Pulse Generation
One Counter Time Measurements
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Default Counter/Timer Pins
PFI Filters
PFI Filters section of Chapter 8, PFI,
Purpose of Source Terminal
Counter Timebase
Counter Timebase
section of