Digital filtering on input channels (counter input) on 6601, DAQmx, .net/C*#, 200µs filter

Hi

Anyone know how to setup digital filtering using DAQmx on 6601 input channels. Maximum default filter is 5µs but i need a 200µs filter.

The channels to filter are input channels on X1 linear encoders (on A, B and gate inputs).

I am using DAQmx in .net/C#

Thanks,

Simon