Generating N-samples with NI 6501 USB?

[xdaf]

Hello all,

I'd like to use my NI 6501 USB DAQ (a simple DAQ with 24 DIO) in order to generate a 16-bit pattern. Using the DAQ assistant, I'm allowed to select "1 sample (on demand)", "N samples" or "continous samples". But, unless I choose the first option, I get an error stating that I can choose only "1 sample (on demand)".

Is that an insurmountable limitation of the 6501?

Thanks

[Wayne.C · Accepted solution]

xdaf,

Found this statement in the docs for the 6501.  'All samples of the DI lines and updates of the DO lines are software-timed.'  I would say that it will only operate in the '1 sample on demand' mode.

[xdaf]

Darn, so I cannot reuse the same software I wrote for NI 6250...

Thanks for replying.