Keysight (Agilent) N2790A High-Voltage Differential Probe, 100 MHz

The Keysight N2790A is a 100 MHz high-voltage differential probe engineered to measure differential signals safely in high-voltage environments where neither measurement point is at ground potential. It enables standard earth-grounded oscilloscopes to capture floating differential measurements across power electronics, automotive systems, and industrial motor drives without compromising signal integrity or operator safety.

Technical Specifications

• Bandwidth: ≥100 MHz


• Maximum Differential Operating Voltage: ±1,400 VDC + peak AC at 500:1 attenuation; ±140 V at 50:1 attenuation


• Maximum Common Mode Voltage: 1,000 V


• Common Mode Rejection Ratio: >50 dB at 1 MHz


• Attenuation Settings: User-selectable 50:1 or 500:1


• Rise Time: ≤3.5 ns


• Input Resistance: 8 MΩ


• Input Capacitance: 3.5 pF


• Cable Length: 70 cm


• Operating Temperature Range: −10 to +50°C (−40 to +85°C with N7013A/N7014A extension kit)

Key Features

• Overrange indicator alerts when probe input exceeds dynamic range


• AutoProbe interface with oscilloscope-supplied power


• Safety rated to 1,000 Vrms CAT II and 600 Vrms CAT III between inputs and earth ground


• Supplied probe tips rated for 1,000 Vrms CAT II and 600 Vrms CAT III operation


• Interchangeable measurement tips: standard browser, retractable hook, and alligator clip configurations

Typical Applications Power electronics testing, automotive high-voltage measurement, industrial motor drive analysis, and floating signal acquisition in complex electrical systems.

Compatibility & Integration Direct AutoProbe compatibility with Keysight InfiniiVision 3000/4000 X-Series, InfiniiVision 5000/6000/7000 (software 5.26.0001+), Infiniium S/V/Z-Series, 90000 X/Q-Series (with N5449A adapter), 8000/54830 Series (software 5.7), 9000 Series (software 2.0), and Infiniium EXR Series.