Keysight (Agilent) N4690C Electronic Calibration Module (ECal), 300 kHz to 18 GHz, Type-N, 50 OHM, 2-Port

The Keysight (Agilent) N4690C is a 2-port electronic calibration module (ECal) that automates VNA calibration across 300 kHz to 18 GHz. Type-N connectors with 50 Ohm impedance enable full two-port calibration via single connection, eliminating manual mechanical kit procedures and reducing setup time. The module stores unique S-parameter data that computes error terms for the vector network analyzer, delivering NIST traceable accuracy.

Solid-state switching and USB control minimize operator error while improving measurement repeatability.

Technical Specifications

• Frequency Range: 300 kHz to 18 GHz


• Ports: 2-port configuration


• Impedance: 50 Ohm


• Connectors: Type-N (male/male, female/female, or male/female options available)


• Control Interface: USB


• Switching Technology: Solid-state


• Accuracy: NIST traceable

Electrical Characteristics

• Maximum Input Power: +9 dBm


• Minimum Input Power: −45 dBm


• Directivity: 43 dB to 50 dB (frequency dependent)


• Source Match: 36 dB to 48 dB (frequency dependent)


• Reflection Tracking: ±0.03 dB to ±0.15 dB (frequency dependent)


• Transmission Tracking: ±0.05 dB to ±0.11 dB (frequency dependent)


• Load Match: 36 dB to 42 dB (frequency dependent)

Key Features

• Single-connection full two-port calibration eliminates multi-step mechanical procedures


• Transfer standard design with embedded S-parameter data ensures consistent accuracy


• Shorter female connector design enhances mechanical repeatability


• Operating temperature: +20 °C to +26 °C


• Environmental tolerance: Up to 95% relative humidity, non-condensing

Typical Applications

• RF and microwave VNA calibration


• Laboratory and field measurement verification


• Production test environments requiring frequent recalibration

Compatibility & Integration Supported on Keysight PNA Series (N522X, N523X, N524X) and ENA Series vector network analyzers.