tokens: The line impedance stabilization network circuit shown in Figure 5 - 2 shall be used . NOTE 1 The line impedance stabilization network can be split in several cases , one per power lead . NOTE 2 The series inductances represent the inductances of the wiring ; the series resistances represent the resistances of the wiring and of the central protections . NOTE 3 The 50W resistors result in 100W at high frequency , similar to the characteristic impedance of the line . NOTE 4 The feed - through capacitors provide a short - circuit at high frequency and make the line impedance stabilization network symmetrical NOTE 5 Connecting the regulation wires of the laboratory supply at the line impedance stabilization network input in order to provide sufficiently low impedance at low frequency is an appropriate method . The source impedance is then dominated by the series resistances in the line impedance stabilization network Alternatively , a large capacitor ( between 1 mF and 10 mF ) will be used .