The DI Sample Clock Timebase (di/SampleClockTimebase) signal is divided down to provide a source for DI Sample Clock. DI Sample Clock Timebase can be generated from external or internal sources. DI Sample Clock Timebase is not available as an output from the chassis.

Using an Internal Source

To use DI Sample Clock with an internal source, specify the signal source and the polarity of the signal. Use the following signals as the source:

  • AI Sample Clock
  • AO Sample Clock
  • Counter n Internal Output
  • Frequency Output
  • DI Change Detection Output

Several other internal signals can be routed to DI Sample Clock. Refer to the Device Routing in MAX topic in the NI-DAQmx Help for more information.

Using an External Source

You can route the following signals as DI Sample Clock:

  • Any PFI terminal on an installed C Series module
  • Analog Comparison Event (an analog trigger)

You can sample data on the rising or falling edge of DI Sample Clock.

Routing DI Sample Clock to an Output Terminal

You can route DI Sample Clock to any output PFI terminal on an installed C Series module. The PFI circuitry inverts the polarity of DI Sample Clock before driving the PFI terminal.