The Keysight (formerly Agilent) E5091A multiport test set combined with the 4-port ENA Series network analyzer is a complete solution for AT/E7405A multiport device measurements. The multiport test set is available in 7- and 9-port configurations. The system is tailored for testing the antenna switch modules for mobile handsets, particularly those modules with balanced ports, although it can be used in a wide range of multiport measurement applications. The system is well-suited for both manufacturing and R&D. It has exceptionally fast measurement speed, and various features that facilitate test automation.