Timing Considerations for AO Series Devices

When using an external ao/SampleClock for finite generations, you need to provide one more sample clock pulse than the number of samples in the generation. The Wait Until Done function/VI uses the extra sample clock to indicate the task is complete. For example, if you want to generate 1000 samples using an external sample clock, the first 1000 samples clocks you provide generates all of the samples, but you need to provide 1001 sample clock pulses for the Wait Until Done function/VI to indicate the task is done. If you are trying to synchronize an analog output generation with another acquisition or generation by sharing a common clock, use the ao/SampleClock as the master clock, or key off of the generation or acquisition providing the master clock to determine when the generation is complete.

Static AO devices, such as the NI 6703 and NI 6704, do not have hardware timing and have multiplexed output. Refer to your device documentation for specifics concerning your device.