Geometrical contruction of waves on a electric line with wave impedance [i]Z[/i] after switching voltage source in place [b][color=#1e84cc]A[/color][/b] - using Bergeron's method. [br]Losses can be set for line using resistor [i]R[sub]V[/sub][/i].[br]These losses are approximated by lumped element model - half the resistance [i]R[sub]V[/sub][/i] is at start of the line, the other half at the end of the line.[br]Loading resistor at the end of the line ([color=#ff0000][b]B[/b][/color]) can be set from short circuit (closed end [i]R[/i]=0) up to almost no-load state (open end R=10[math]k\Omega[/math]).