johnsold

The Fract/Exp string to number function should work fine for what you are doing, although you may need to adjust the format slightly, depending on how your instrument formats its output. Use one conversion function for each string. Then wire the number outputs from each conversion function to the math function inputs. To verify what is going on, place a numeric indicator at the output of each function so you can see that it is or isnot working as you would expect. The auto connect "feature" is probably what is causing you to connect the lines together. Go to Tools >> Options..>> Block Diagram and uncheck "Enable auto wiring." It is handy, but can be frustrating until you get used to it. Spend some time with the tutorial. It can be very helpful to the newbie. Lynn