Keysight (Agilent) N4691B Electronic Calibration Module, 300 kHz to 26.5 GHz

The Keysight N4691B Electronic Calibration Module is a single-connection ECal transfer standard that enables rapid, operator-independent calibration of vector network analyzers from 300 kHz to 26.5 GHz. Using solid-state switching and electronically programmable impedance states, it delivers NIST-traceable accuracy and repeatability while eliminating mechanical wear on test connectors—typically completing full two-port calibration in less than half the time required by conventional kits.

– Technical Specifications

• Frequency Range: 300 kHz to 26.5 GHz
• Ports: 2-port configuration
• Connector: 3.5 mm
• Interface: USB (direct control with PNA and ENA series analyzers); 85097B interface kit available for legacy analyzer support
• Calibration Speed: Significantly faster than mechanical kits; typically <50% of manual calibration time
• Power Handling: Calibration results may degrade if input power exceeds +7 dBm or +9 dBm (configuration-dependent)
• Traceability: NIST-traceable characterizations
• User Storage: Five user-defined characterizations plus factory calibration data

– Key Features

• Solid-state switching eliminates connector wear from repeated connections
• Electronic impedance standards serve as verifiable transfer standards
• Full two-port calibration achieved with single physical connection
• USB interface enables direct control integration with modern Keysight network analyzers
• Repeatable, traceable measurements reduce measurement uncertainty
• Flexible characterization storage accommodates multiple test setups

– Typical Applications

• Production test and incoming inspection of RF/microwave components
• Periodic VNA calibration verification and maintenance
• Multi-site laboratory calibration transfer standards
• Automated test sequences requiring frequent calibration updates

– Compatibility & Integration

The N4691B integrates directly with Keysight PNA and ENA series network analyzers via USB. Legacy compatibility with Agilent 8753E/ES/ET and 8720D/ES/ET analyzers is supported using the optional 85097B interface kit with specified firmware revisions. Refer to the ECal Reference Guide (N4693-90001) for detailed compatibility matrices and firmware requirements.