The ongoing adoption of 5G networks has forced test and measurement equipment makers to ensure their products can keep up with the higher frequencies in these high-speed networks. For one, waveforms in 5G are wider and more complex, with uplink and downlink signals that have larger bandwidths than before. Test instruments such as oscilloscopes must support high linearity, tight amplitude and phase accuracy over large bandwidths, low phase noise, and extensive frequency coverage for multiband devices. In addition, engineers must test designs to RF signal chains can support simultaneous operation of both 4G and 5G signals. Beyond 5G, the development of 6G wireless technologies later this decade will keep test engineers busy trying to keep up.