NI 9219 Sample Rate

[sfrosty]

I've got a NI-9219 module with specs of 100 samples/sec/chnl, but I can sample at 1 million sampes per second no problem. Is that because I'm using a virtual module in MAX and not a physical module?

[Kevin_Price]

Try reading the data as a waveform and then inspect the "dt" field.  I'll bet DAQmx is automatically coercing to the highest *supported* sample rate without throwing an error.  (Though perhaps there's a warning?).

It's a pretty common (but not universal!) behavior for DAQmx to coerce inputs to the nearest legal, supported value.

-Kevin P

[Nathan-M]

Yes - when using a simulated device, you won't get the same kind of errors related to timing constraints as you would with the physical device.