While using a data acquisition (DAQ) board to simultaneously acquire data from multiple channels, I am experiencing cross talk between channels. The input channels are of AC-class, and my sampling rate is around 500MHz. It seems that while reading multiple channels, the data acquired is a combination of the input channels. Meaning, that the channels are not operating independently. Also, for example, when using channel 1 as an input, leaving all other channels unconnected, I see that the data collected from the unconnected channels are influenced by channel 1. I would like to find a way of acquiring data from multiple channels without getting a blend of the input channels.
I don't unerstand everything. The channels are isolated and you can acquire in one or multiple sample without problem.
What is the card you are using? Perhaps you have a trouble with your card?
You are correct, I am using an E-series board. At this point, when I display the waveforms of my input channels on different plots, I don’t experience any cross talking between these signals. Once I attempt to acquire these signals using the same wave plotter and analog input block, then the cross talk occurs. I have attached pictures of the block diagrams, and graphical outputs. As you can see, the output of the two waveforms plotted on the same graph aren’t independent.