The R&S ZN-Z84 from Rohde & Schwarz is an external switch matrix that operates from 10 MHz to 8.5 GHz, designed to complement the R&S ZNB network analyzer. The base model is equipped with six test ports. When needed, the number of test ports can be increased in groups of six to provide a total of 24 ports. A four-port R&S ZNB with two 24-port matrices can therefore support 48 test ports. The switch matrix can measure the S-parameters of antenna I/O modules, multiband filters and splitters, especially those used in high-speed data communications systems. The test solution is also ideal for conducting phase measurements on multi-antenna arrays and for characterizing common multiport DUTs such as multiple splitters, switch modules and multicore cables.