Agilent/Keysight N4433D

The Keysight N4433D is a 4-port electronic calibration (ECal) module that delivers fast, accurate full-port calibration for Keysight vector network analyzers. Unlike traditional mechanical calibration kits, this USB-controlled module completes 4-port calibration in less than half the time while reducing operator error and connector wear.

Technical Specifications

• 300 kHz to 26.5 GHz (standard)


• DC to 26.5 GHz (with Option 0DC)


• 50 Ohm impedance Connectors


• 3.5 mm, mixed connector type configurations (female-female, male-male, female-male) Directivity Performance (Option 010, 3.5 mm female)


• DC to 10 MHz: 50 dB


• 300 kHz to 10 MHz: 45 dB


• 10 MHz to 5 GHz: 50 dB


• 5 to 9 GHz: 47 dB


• 9 to 13.5 GHz: 45 dB


• 13.5 to 20 GHz: 40 dB


• 20 to 26.5 GHz: 36 dB Operating Environment


• Temperature: +20 °C to +26 °C


• Humidity: Up to 95% RH at 40 °C, non-condensing

Key Features

• Direct USB control from compatible Keysight VNAs eliminates manual calibration workflows


• Firmware-driven process reduces operator intervention and associated errors


• Connector longevity through reduced mechanical stress and wear cycles


• Option 0DC extends calibration capability to DC for broadband device characterization and time-domain analysis

Typical Applications Full 4-port calibration of vector network analyzers; broadband component and circuit characterization; device modeling requiring DC-to-microwave frequency span.

Compatibility & Integration Designed for direct integration with Keysight vector network analyzers via USB interface.