Use MATLAB Simulink with USB-6009

[Hyon Lim]

I tried some work with USB-6009 using Simulink.

The version of my MATLAB is R2008a.

However, analog input block size is fixed by 2.

Why should be 2?

I couldn't understand.

[rpurser]

Hi,

NI-DAQmx requires at least two samples for clocked acquisition.  There are additional simulink blocks that were introduced in R2008a to allow single sample acquisition and generation.

-Rob

[Hyon Lim]

What the clocked acquisition means?

I don't understand why two samples are obtained in a one sample time?

If 2.1 and 2.3 were measured, what is the truth?

And what are the additional blocks for single sample acquisition?

Could you introduce an example?

[rpurser]

 I've attached a picture of the blocks I'm talking about.

All the best,

-Rob