Hi All! I have a very specific question about data processing.
I am currently trying to use multiple channels and measure them "simultaenously" (I know the machine doesn't actually do that). I have an initialisation (see attachment) that includes three AI ports and also a write data section (see attachment) that runs , writes/reads, and then stops the process.
Now this is where I had problems understanding how the data is being read out, and so I know I am sure I am not aware of something.
When I select in the DAQmx Read I then select Analog > Multiple Channels > Multiple Samples > 2D DBL what exactly am I selecting? I expected three rows (From the three initialisations in the beginning) as an output but there are only two. So there is something I fundamentally missed. My purpose is to write finite data out from all the three ports using the DAQmx Read.
So far all the readout I get from two of the ports give slightly the same signal, as I understand there is also "ghosting" happening ( a separate issue I believe I have resolved by adding the third channel before the channel with lower impedance).
Note: I have looked at the following links quite a few times but if I missed anything that is relevant to this discussion please excuse my lack of observation. These ones were helpful so far but I just can't seem to find what I need to understand what is happening.
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P8b1SAC&l=en-AU
https://forums.ni.com/t5/Multifunction-DAQ/How-to-use-DAQmx-Read-to-measure-multiple-analog-channels...
https://www.ni.com/en/support/documentation/supplemental/06/learn-10-functions-in-ni-daqmx-and-handl...
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