Random Interleaved Sampling, RIS, (also often called "equivalent time mode") is an acquisition technique that allows effective sampling rates higher than the maximum single-shot sampling rate. It is used only on repetitive waveforms with a stable trigger. The RIS sampling is achieved by making multiple single-shot acquisitions (shown in this slide as successive acquisitions in different colors) at the maximum real-time sample rate. The instrument then interleaves these acquisitions to provide a waveform that is a multiple of the maximum single-shot sampling rate - maybe even 100 times faster sampling. However, it will take the instrument a longer time to generate a RIS waveform since it must collect the waveform data of multiple acquisitions. This will depend on the trigger rate.