DS-2040CA Digital Oscilloscope: 1.DC-40MHz,dual channel color display 2.1GS/s real sample,50GS/s equivalent 3.w/ ... rate50GSa/sInput impedance 1MΩ//13pFInput coupling DC, AC, GNDTrigger Edge, video, pulse, delayAcquisition modesAuto, normal, singleTrigger sourcesCH1, CH2, Ext, Ext/5 ... . MCH Digital Oscilloscope,DS-2040CA digital oscilloscope,40Mhz bandwidth,color display,dual channel