• Selectable overhead voltage principle
– All adaptive: The overhead voltage follows 0.6 VPeak < signals < 6.2 VPeak.
– Semi adaptive: The overhead voltage follows 3.1 VPeak < signals < 6.2 VPeak.
• Metering 2.2 Vrms.
• High and low battery with automatic switching
• Battery supply as low as -10 V
•.