Keysight (Agilent) N4694A lectronic Calibration Module, 10 MHz to 67 GHz

The Keysight (Agilent) N4694A is a two-port electronic calibration module that automates vector network analyzer calibration from 10 MHz to 67 GHz. Equipped with 1.85 mm connectors, this ECal module delivers NIST-traceable accuracy while eliminating manual calibration steps and reducing connector wear on the VNA. A single connection enables full two-port calibration with solid-state switching technology and direct USB control via Keysight PNA and ENA series analyzers.

Technical Specifications

• Frequency Range: 10 MHz to 67 GHz


• Ports: 2-port configuration


• Connector Type: 1.85 mm (female or male depending on configuration)


• Calibration Type: Full two-port calibration with single connection


• Control Interface: USB (primary); 85097B interface for legacy Agilent 8753E/ES/ET and 8720D/ES/ET analyzers


• Switching Technology: Solid-state


• Calibration Traceability: NIST traceable


• Physical Package: Approximately 5 × 10 × 17 inches; 4 lbs; supplied with wooden storage box and foam inserts

Key Features

• Automated calibration reduces operator error and manual intervention


• Single-connection topology minimizes VNA connector stress


• Fast calibration process with consistent, accurate results


• Software-controlled operation via VNA instrument drivers


• Solid-state architecture eliminates mechanical relay wear

Typical Applications

• Vector network analyzer periodic calibration and verification


• High-frequency S-parameter measurements requiring traceable accuracy


• Production and field-service calibration workflows


• Research and development characterization across microwave and millimeter-wave bands

Compatibility & Integration Direct USB control integrates with Keysight PNA and ENA series network analyzers. Legacy support via 85097B interface extends compatibility to Agilent 8753E/ES/ET and 8720D/ES/ET systems when using appropriate parallel cable and firmware Rev. 7.74 or later.