So, no. I was not talking about your Viewer being in Logarithmic mode or not, I was wondering if you were logging/recording your data to a log file (a feature in SignalExpress 2.0+); I'm going to assume that you are not logging your data.
You mentioned continually receiving data, but eventhough you may have been running a project for at least 20 seconds, this does not mean that we have all that data history; this is what logging/recording is for. So if you are simply receiving data and viewing it in the data viewer, the viewer can only show you the last chunk of data that was received, but none of the history (again, unless you record the data).
I hope that makes sense. If that just sparked more questions, please feel free to ask.
Phil