DaqMX Base Read as Waveform Capability Missing for Mac Install

[jamesd]

As of now I have a VI running a signal averaging program using arrays as data types and the program takes up quite a bit of memory, I was curious to try it by sampling the data as waveform data types as opposed to an array.

The drop down menu from the DaqMXbase Read has no waveform options and for some reason "DAQmx Read (Analog 1D Wfm NChan NSamp).vi" is missing from the install.  How can add this capability or where can I find this specific file?

Thanks.

[AdnanZ · Accepted solution]

DAQmx and DAQmx base are different drivers and, hence, have different functionality. Since you are using the Mac, you will need to use the DAQmx Base driver which does have limited functionality when compared to DAQmx.

[JoeFriedchicken]

Have you ever looked at how a waveform datatype is packaged? It uses an array to hold the data. In addition, it also uses a t0 to mark the start time and a dt to mark the sample period (not to mention the different attributes you can store in it). The waveform datatype uses slightly more memory than the array datatype for the same number of samples 🙂

If you want to decrease your memory footprint, the best course of action is to process fewer samples per iteration. Fewer samples means a shorter array means less memory.

[jamesd]

Thanks for the help, that clarifies quite a bit.  I managed to get the application working with arrays as the problem was with the program design, not the data type used, as usual.