With the storage menu and triggering function concentrated to assure safe use by anyone engaged in the production and a clear panel layout showing operations at a glance, the DCS-7000 Series of oscilloscopes are easy-to-use models even for beginners in spite of the many, versatile functions packed in each unit. The maximum sampling rate of 40 MS/s (DCS-7040) enables advanced waveform observations, and an analog function (50 MHz) is also incorporated so that each model can play two roles of digital and analog. Each channel has a 4K-word acquisition memory. The peak detector and overwriting functions are provided in pursuit of a compatibility between the ease of use and the high functionality. Optional interfaces can also be installed so the waveforms displayed on the CRT can be hard-copied on a plotter or a special printer. (1) Maximum sampling rate of 40 MS/s (DCS-7040; 20 MS/s with the DCS-7020) allows advanced waveform observations. (2) 4K-word acquisition memories and 2K-word reference memories (backed up by a built-in battery) are provided. (3) The peak detector function can detect glitch with pulse duration of 25 ns or more. (4) The overwriting function makes for easy measurements of jitter, voltage variation, etc. (5) The external clock input can be used to sample asynchronous low-speed signals as required.