NI-TClk
External Sample Clock and External Sample Clock Timebase Considerations

NI-TClk works with internal and external sample clocks, and with internal and external sample clock timebases for the NI modular instruments that support them.

If all of the sessions that you are synchronizing have external sample clocks or external sample clock timebases, then the sample clock or sample clock timebase rates of all the sessions must be equal.

If some of the sessions that you are synchronizing have internal sample clocks and other sessions have external sample clocks or external sample clock timebases, then the rates of all the external sample clocks or the external sample clock timebases must be equal to one of the internal sample clocks.