1. Insulation Resistance measured at:
DC 50V for the 3SD4-75, 3SD4-90 and 3SD4-145
DC 100V for the 3SD4-200 and 3SD4-230
2. DC Holdover Voltage measured in accordance with the ITU-T K.12.
3. Capacitance measured at 1 MHz for all part numbers is ≤ 0.5 pF