I am looking to enable lowpass filtering on multiple stations and DAQ boards. I had in mind that a 1MHz cutoff is a good starting point, and we already have some physical RC filters in this neighborhood. The idea is to replace any physical filters with those built into the DAQ system.
I have started with these properties found in DAQmx
Dim _channel As NationalInstruments.DAQmx.AIChannel _channel = _task.AIChannels.CreateVoltageChannel(...) _channel.LowpassEnable = True _channel.LowpassCutoffFrequency = 1000000000.0
based of this page, and some more info here. However, I haven't found the latter very helpful as the task I created in MAX doesn't have a "Device" tab...
My question is, how do I know the filter frequencies available on my cards? I have not been able to find this information anywhere. Across 15 production machines, I have an assortment of DAQ cards, including 6001, 6008, 6211, and 6343, currently.
Also, do I need to select some clock source to perform the filtering? I am not sure how it is done internally in the card.