Agilent/Keysight N1298C

The Keysight N1298C is a low-noise filter accessory engineered to enhance the performance of Keysight B2960B Series precision source/measure units. It reduces voltage and current noise across both sourcing and measurement functions, delivering output characteristics comparable to linear power supplies. The filter supports DC voltage outputs to 210 V and current outputs to 3 A, with an output resistance of 0.3 Ω nominal in 2-wire configuration.

Technical Specifications

• Maximum Output Range: 210 V DC; 3 A DC


• Output Resistance (2-wire): 0.3 Ω nominal


• Maximum Capacitive Load: 1 mF


• Voltage Noise (Sourcing): 5 μVpp (0.1 to 10 Hz); 30 μVrms (10 to 20 MHz)


• Current Noise (Sourcing): 60 pApp (0.1 to 10 Hz); 450 nArms (10 to 1 MHz)


• Small Signal Bandwidth: 2 kHz nominal (1 A/3 A ranges); 800 Hz nominal (100 mA range)


• Output Connectors: Banana jacks

Key Features

• Reduces noise floor for both voltage and current sourcing


• Supports bipolar voltage and current operation across wide ranges


• 4-wire connection capability for accurate remote sourcing and measurement


• Drives capacitive loads up to 1 mF


• 0.3 Ω output resistance minimizes voltage drop at measurement points

Compatibility & Integration The N1298C is designed specifically for integration with the Keysight B2961B/B2962B low-noise power sources and compatible B2960B Series SMUs. When connected, the filter significantly reduces the residual noise floor of the measurement system, enabling precision applications requiring ultra-clean signal sourcing.