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multiplexing signal cross talk

Hi All,

 

I have a 6281 and am aquaring several analog signals. Sadly I only have 1 analog to digital converter =(. Therefore I have to multiplex to get all my good bits of data. Anyways, I am including my vi's construction for critique. One of my signals is several orders of magnitude above the others. I notice there is a lot of cross talk from the ~5v signal to the ~5mv signals. What is the best way to isolate the signals? Is there a hardware or software solution to this problem?

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