What are the grounded conductor and floating attributes for in PropCalc?
The number of modes that PropCalc searches for is determined by the number of different conductor group numbers. The desired reference conductor(s) should be assigned as grounded. Any conductors that are not part of the ground and not part of a signal line should be assigned as floating conductors. The propagation constant is not a function of how the conductors are assigned, but the internal total current calculation is a function and will affect the characteristic impedance calculated.
