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Chapter 6 Counters
Routing a Signal to Counter n Source
Each counter has independent input selectors for the Counter n Source signal. Any of the
following signals can be routed to the Counter n Source input:
•80MHz Timebase
•20MHz Timebase
• 13.1072 MHz Timebase
• 12.8 MHz Timebase
•10MHz Timebase
• 100 kHz Timebase
• Any PFI terminal
• Analog Comparison Event
• Change Detection Event
In addition, TC or Gate from a counter can be routed to a different counter source.
Some of these options may not be available in some driver software. Refer to the Device Routing
in MAX topic in the NI-DAQmx Help or the LabVIEW Help for more information about available
routing options.
Routing Counter n Source to an Output Terminal
You can route Counter n Source out to any PFI terminal.
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.
Table 6-8. Counter Applications and Counter n Source
Application Purpose of Source Terminal
Pulse Generation Counter Timebase
One Counter Time Measurements Counter Timebase
Two Counter Time Measurements Input Terminal
Non-Buffered Edge Counting Input Terminal
Buffered Edge Counting Input Terminal
Two-Edge Separation Counter Timebase
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