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    Last Modified: February 13, 2019

    The following figure shows the FD-116xx clock routing circuitry and timebases.

    Figure 1. Clock Routing Circuitry
    You can use the 13.1072 MHz, 12.8 MHz, 12.288 MHz, and 10.24 MHz timebases to generate the AI Sample Clock signals. These timebases are generated directly from the onboard clock generator. By default, NI-DAQmx automatically chooses the most suitable timebase for a selected data rate.[1] You can also manually select a timebase through the NI-DAQmx API.

    Refer to the FieldDAQ Timing Considerations and Master Timebase Synchronization topics in the NI-DAQmx Help for more information about configuring timing in the NI-DAQmx API.

    • 1 Automatic timebase coercion is supported in NI-DAQmx 18.5 and later. Previous versions of NI-DAQmx use the 12.8 MHz timebase by default.

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