The Keysight N2891A High-Voltage Differential Probe enables floating signal measurements on earth-grounded oscilloscopes, making it essential for high-voltage circuit analysis in power electronics, automotive systems, and motor drives. This differential probe safely isolates measurement points from ground, allowing engineers to capture dynamic signals across components where neither terminal references earth. The probe delivers 70 MHz bandwidth with selectable 100:1 or 1000:1 attenuation, accommodating differential voltages up to ±7000 V and common-mode voltages to ±7000 V.
Technical Specifications
• Bandwidth: ≥ 70 MHz
• Rise Time: ≤ 5 ns
• Attenuation Ratio: User-selectable 100:1 or 1000:1
• Differential Voltage Range: ±7000 V (1000:1) / ±700 V (100:1)
• Common-Mode Voltage Range: ±7000 V (1000:1)
• Input Resistance (differential): 100 MΩ
• Input Capacitance (differential): 5 pF
• Output Connector: 1 MΩ BNC input
• BNC Cable Length: 90 cm
• Input Lead Length: 60 cm
• Weight: 500 g
• Power: 4× AA batteries or USB host port
• Over-range Indicator: Integrated alert function
– Key Features
• User-selectable attenuation provides measurement flexibility from 700 V to 7000 V differential ranges
• High input impedance (100 MΩ) minimizes circuit loading
• CAT I safety rating to 5000 Vrms (1000:1 attenuation)
• Dual power options: battery or USB supply from oscilloscope or PC
• Includes safety hook adapters, high-voltage alligator clips, and probe tip accessories for component access
– Typical Applications
• Power converter and inverter characterization
• Automotive high-voltage system testing
• Motor drive signal analysis
• Floating-mode measurements in multilevel converters
– Compatibility & Integration
The N2891A connects to any oscilloscope with a 1 MΩ BNC input connector. The 90 cm BNC cable and 60 cm input leads provide flexible probe positioning in confined measurement environments.
