The Agilent/Keysight N4421B is a multiport S-parameter test set that extends Vector Network Analyzer capabilities for complex multi-port measurements. Integrated with PNA and PNA-L series VNAs, it delivers 4-port error-corrected measurements using electronic calibration (ECal) for fast, accurate, and repeatable characterization. The test set eliminates mechanical calibration procedures, reducing setup time and operator-induced measurement errors.
Technical Specifications
Frequency Range: 10 MHz to 50 GHz (Option H67 extends range to 67 GHz when paired with E8361A).
Port Configuration: Supports 2-port VNAs for 4-port measurements. Multiport family extends to 16-port capability.
Calibration: Electronic calibration via single-connection process. USB-controlled ECal modules operate directly from the network analyzer without external PC.
Transmission Loss (Typical):
• 20–30 GHz: −31 dB
• 30–40 GHz: −36 dB
• 40–50 GHz: −41 dB
• 50–60 GHz: −47 dB
• 60–67 GHz: −48 dB
• 67 GHz: −50 dB
Switching: Solid-state switches for reliable, high-speed operation.
– Key Features
• Direct VNA control via PNA/PNA-L Option 550 or compatible models (E8364B with Option 014)
• Balanced measurement architecture for differential device testing
• Time-domain reflectometry (TDR) enhancements
• Single USB cable integration
– Typical Applications
• Wireless infrastructure components and integrated modules
• High-speed digital interconnect characterization
• Signal integrity analysis including eye diagram measurements at elevated bit rates
• RLCG extraction for differential transmission line modeling
• Broadband device modeling with extended calibration range capability
– Compatibility & Integration
Designed for Agilent/Keysight PNA and PNA-L series network analyzers. ECal modules integrate via USB with no external software or controllers required.
