Filter Delay Removal

NI-DAQmx 18.6 Help


Edition Date: January 2019
Part Number: 370466AH-01
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NI 4302, 4303, 4304, 4305, 433x, 4340, 4464, 4480, 4481, and 449x devices support filter delay removal, which automatically discards filter delay samples. The AI.RemoveFilterDelay attribute/property controls the filter delay removal.

On NI 449x devices, the AI.RemoveFilterDelay attribute/property is disabled by default.

On NI 4302, 4303, 4304, 4305, 433x, 4340, 4464, 4480, and 4481 devices, the AI.RemoveFilterDelay attribute/property is enabled by default. On the NI 4330/4331, filter delay removal is always enabled.

On NI 4302, 4303, 4304, 4305, 4464, 4339, 4340, 4480, and 4481 devices, you can use the AI.FilterDelayAdjustment attribute/property to further adjust which samples to discard. This adjustment is relative to the amount of filter delay in the device, which is indicated by the AI.FilterDelay attribute/property.

If you disable the AI.RemoveFilterDelay attribute/property, you must compensate for filter delay samples. Refer to your device documentation for information on how many filter delay samples to compensate for on your device.

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