Hello, I'm using a NI USB-6002 to take simultaneous voltage readings on a couple of different channels and sampling rates. I'm aware that to avoid aliasing effects I need to low-pass filter each signal before it's sampled by the DAQ. In the USB-6002 user guide I can't find any mention of anti-aliasing filters. Does this mean that I need to pass the voltage signal through an external low-pass filter myself before the DAQ inputs, or is anti-aliasing 'built in' to how the DAQ works? Thanks in advance.
The 6002 does not have anti-aliasing built in. You'd need to handle that yourself.
(Note: it also doesn't support different sample rates on different channels at the same time, though you can usually just sample at the highest needed rate and post-process the slow-changing sensor if desired. Also, it's a multiplexing DAQ, so channels aren't truly simultaneous. For many apps they're close enough though.)