There are some helpers to let you find how your signal is being modified, and which values exactly are spit out from a module:

• from the Ai titlebar select View/Inspector. This opens a little window which displays the value in a port where you hover the mouse
  
• hold Shift pressed and over the mouse over the port you wish to inspect (this works only if the inspector window is closed). A small box appears at the mouse pointer, showing the value or the texture
  
• for numeric values, insert a Monitor module. Note that this updates only if the output is connected and used.
• for numeric values, insert a ConstantWithText module and change its skin to InOutWithOveride. Note that this updates only if the output is connected and used.