The N2751A InfiniiMode differential probe is a new generation of low-cost differential active probes compatible with Keysight InfiniiVision and Infiniium oscilloscopes’ AutoProbe interface. It comes with new operation modes and convenient measurements of differential, single-ended, and common mode signals with a single probe tip, without reconnecting the probe to change the connection. The N2751A probe’s InfiniiMode provides the following modes of operation.

  • A – B (differential)
  • A – ground (single-ended A)
  • B – ground (single-ended B)
  • (A+B)/2 – ground (common mode)

Quick Action Scope Control

The convenient quick action scope control feature built into the probe lets you turn the probe's headlight on and off, or control some frequently used scope functions such as RUN/STOP, auto scale, quick print, quick save, etc. with a button press on the probe.

Measurement Versatility

The probes integrate many of the features and characteristics needed for today’s general-purpose, high-speed differential probing – especially in digital system design, component design/characterization, and differential serial bus measurements. The N2751A Series differential probes offer 2:1 and 10:1 dual attenuation settings for a broad range of applications. Dual attenuation range is automatically configured depending on the size of the input signal. These differential probes have an input resistance of 200 kΩ (differential) or 100 kΩ (each input to ground) and an extremely low input capacitance of 700 fF to minimize circuit loading. With superior signal fidelity, this makes the probe useful for most digital design and debug applications. And with their wide dynamic range (10 Vpp at 10:1) and offset range (±15 V), these probes can be used in a wide variety of analog signal measurements as well.


  • Bandwidth: 3.5 GHz
  • Attenuation ratio: 2:1 or 10:1 (switchable)


  • Dynamic range: ± 5 V or 10 Vpp (at 10:1), ± 1 V or 2 Vpp (at 2:1)
  • DC offset range: ± 15 V
  • Maximum input voltage: 30 V DC + peak AC

Input Impedance:

  • Differential input R: 200 kΩ
  • Single-ended input R: 100 kΩ
  • Common mode input R: 50 kΩ
  • Input C: 700 fF (with browser)


  • Comes standard with solder-in, socketed and browser tips (two each)
  • Replacement parts: N2776A Differential browser tips (including qty 3), N2777A InfiniiMode solder-in tips (including qty 3), and N2778A InfiniiMode socketed tips (including qty 3)
  • Order N4822A socketed tip for use with USB/Ethernet application fixtures (not included in the standard probe kit)

Extend The Capabilities

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