Agilent/Keysight N2841A

The Agilent/Keysight N2841A is a 12 GHz differential probe head in the InfiniiMax III+ Series, engineered for high-speed signal integrity measurements across digital and RF applications. This probe head minimizes loading effects while delivering the measurement fidelity required for complex probing of modern high-speed interfaces. The compact design supports both 10:1 and 5:1 attenuation settings, with input impedance options of 1 MΩ || 0.5 pF (10:1) or 200 kΩ || 1 pF (5:1). Differential input capability spans ±2.5 V DC coupled, while common mode voltage handling extends to ±5 V (DC to 1 GHz) and ±2 V (DC to 12 GHz). Noise performance is 60 dB at 1 MHz, > 40 dB at 1 GHz, and > 30 dB at 10 GHz. Probe tip electrical characteristics include capacitance < 0.5 pF (10:1) and inductance 60 dB @ 1 MHz, > 40 dB @ 1 GHz, > 30 dB @ 10 GHz Noise: < 1.2 mVrms typical (10:1 setting) Tip Capacitance: < 0.5 pF (10:1 setting) Tip Inductance: < 1 nH Key Features Flat frequency response to 12 GHz for accurate high-frequency signal reproduction Minimal insertion loss across usable bandwidth Dual attenuation settings optimize for different impedance and noise requirements Low tip capacitance and inductance reduce circuit loading High common mode rejection across the frequency range Typical Applications USB 3.0/3.1 and PCIe Gen3/Gen4/Gen5 differential signal measurement DDR4/DDR5 memory interface characterization HDMI signal integrity analysis High-speed IC and networking equipment testing Semiconductor and advanced research applications requiring differential probing Compatibility & Integration Connects directly to Keysight InfiniiMax III and InfiniiMax III+ series probe amplifiers and compatible oscilloscopes including the 90000 X-Series and V-Series platforms. Requires power and signal connection through the proprietary InfiniiMax connector. Supports standard 1.0 mm pitch probe tip accessories.