The new RIGOL Vector Network Analysis mode adds significant capability to our RSA family of Spectrum Analyzers. Customers needing to characterize active or passive components, identify signal path errors or tune antennas will benefit from the complete VNA solution. Supports the following: S11 - Reflection Coefficient S21 - Forward Transmission Distance to Fault The VNA Mode comes with a rich visualization set to quickly identify and resolve problems with your RF Designs Smith Chart Return Loss Standing Wave Ratio Phase Delay Insertion Loss Group Delay Return Loss Distance to Fault