Wait For Next Sample Clock Wait Mode

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Data Type:	int32
Description:	Specifies how DAQmxWaitForNextSampleClock() waits for the next Sample Clock pulse.

Valid values

DAQmx_Val_WaitForInterrupt	12523	Check for Sample Clock pulses when the system receives an interrupt service request. This mode is the most CPU efficient, but results in lower possible sampling rates.
DAQmx_Val_Poll	12524	Repeatedly check for Sample Clock pulses as fast as possible. This mode allows for the highest sampling rates at the expense of CPU efficiency.

NI-DAQ™mx C Reference