The Keysight N2791A is a 25 MHz differential probe engineered for floating signal measurements on earth-grounded oscilloscopes. It enables safe, accurate acquisition of differential and common mode signals up to ±700 V, making it ideal for power electronics characterization and circuit analysis where conventional single-ended probes are inadequate.
This probe features user-selectable 10:1 or 100:1 attenuation, allowing flexible dynamic range optimization across measurement scenarios. At 100:1 attenuation, maximum differential operating voltage reaches ±700 V; at 10:1, ±70 V. Common mode voltage is rated to ±700 V across both settings. The 1000 Vrms CAT II working voltage rating between input leads and earth ensures safe operation in industrial and lab environments.
Technical Specifications
• Bandwidth: 25 MHz
• Attenuation: User-selectable 10:1 or 100:1
• Maximum Differential Voltage: ±700 V (100:1), ±70 V (10:1)
• Maximum Common Mode Voltage: ±700 V
• Input Impedance: 8 MΩ
• Input Capacitance: 8 pF
• Rise Time: ≤ 14 ns
• Common Mode Rejection Ratio: > 50 dB at 1 MHz
• CAT Rating: II, 1000 Vrms maximum working voltage
– Key Features
• Battery-powered operation (4× AA cells included) with optional USB power via supplied 2 m cable
• LED power status indicator and over-range alert for dynamic range monitoring
• 70 cm BNC output cable compatible with any 1 MΩ oscilloscope input
• 45 cm input lead length with safety hooks and alligator clips
• Compact form factor: 170 mm × 63 mm, 400 g
• Operating temperature range: −10 to 40 °C
– Typical Applications
Power supply characterization, motor drive analysis, switching circuit evaluation, isolated signal measurement in multi-channel systems, and DC-link voltage monitoring in power conversion topologies.
– Compatibility & Integration
Connects directly to any oscilloscope with 1 MΩ BNC input, including Keysight InfiniiVision 30 series. AutoProbe interface compatible on scope models supporting this standard.
