Keysight (Agilent) N4433A Electronic Calibration Module (ECal), 300 kHz to 20 GHz, 3.5 mm, 4-port

The Keysight (Agilent) N4433A is a 4-port electronic calibration module that delivers NIST-traceable network analyzer calibrations from 300 kHz to 20 GHz using 3.5 mm connectors. This ECal module eliminates the complexity of mechanical calibration kits by enabling full 3- or 4-port calibrations with a single connection, dramatically reducing setup time and connection complexity. Solid-state switching technology ensures reliable operation across the entire frequency range while maintaining accuracy equivalent to traditional mechanical methods.

Technical Specifications

• Frequency Range: 300 kHz to 20 GHz


• Ports: 4


• Connectors: 3.5 mm female (Option 010); mixed 3.5 mm male/female available


• Maximum Input Power: +7 dBm


• Damage Level: +20 dBm


• Maximum DC Level at Test Port: ±3 V


• Calibration Standard: NIST traceable; accuracy comparable to mechanical methods


• Control Interface: USB


• Power: USB-supplied when connected to compatible analyzers; external supply optional via interface kit

Key Features

• Single-connection 3- and 4-port calibration capability


• Solid-state switching for reliability and repeatability


• Direct USB control integration with PNA and ENA series network analyzers


• Transfer standard functionality - accurately transfers factory calibration accuracy to the analyzer


• Eliminates need for mechanical calibration standards and multiple connectors

Typical Applications

• Production and field network analyzer calibration


• Rapid multi-port device characterization


• Maintenance and periodic recalibration workflows


• In-situ calibration verification across 300 kHz to 20 GHz band

Compatibility & Integration The N4433A connects directly to Keysight PNA and ENA series network analyzers requiring firmware revision 2.5 or higher. Older analyzer families (8753, 8720) may operate with an 85097B interface kit and external power supply.