This application note introduces the R&S RTO-K17 and R&S RTE-K17 High Definition Option for the R&S RTO and R&S RTE Digital Oscilloscopes. It enhances the vertical resolution and trigger sensitivity of both oscilloscope families to up to 16 bit by applying digital filtering to the signal in the acquisition path. Upgrading the RTO and RTE with this option can be done on demand by software key-code, which allows for flexibility.