I'm having having the same problem as Migrant. Has this issue been addressed yet?

Thanks,

Rob

I am currently running 6.10.2.2 and 6.9.14 with a 6404B interface. I can not get the Math Channels Filters to work properly. For example if I setup a HighPass(A,1000) to filter out 60Hz noise The filter does very little to suppress the 60Hz noise, about -6dB is all I get with a filter set to 1000Hz....