The R&S®ZNB and R&S®ZNBT vector network analyzers from Rohde & Schwarz now support eye diagrams. Eye diagrams are used to determine the quality of a signal transmitting device. The video introduces the R&S®ZNB-K20 option which is fully integrated in the network analyzer firmware to allow easy access and operation. Simultaneous display of frequency domain, time domain and eye diagram analysis makes this solution ideal, for example, for compliance testing of digital interconnect technologies such