For frequency and period measurements using Sample Clock timing, some devices can return an averaged measurement of all periods since the previous Sample Clock pulse, instead of measuring only the period immediately preceding the current Sample Clock pulse. Use the EnableAveraging DAQmx Channel property/attribute, associated with each of those measurement types, to enable averaging.If you card contains multiple counters, you could use one of them to generate a custom Sample Clock, thus specifying over which period to perform the averaging. The custom Sample Clock signal can be routed internally, using one of the PFI lines, thus eliminating the need for external wiring.
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