In order to meet HDBaseT electrical standards, these Pulse Electronics, a YAGEO Company magnetics must serve two key functions: 1) provide safety isolation of 1500 Vrms, 60 seconds minimum, and 2) provide common mode noise rejection for improved EMI performance. Isolation is achieved by the transformers. The common-mode-chokes (CMCs) are responsible for reducing noise that typically is generated by common-mode currents from category cables. This is often called common-mode rejection.