... display 4.with USB interface MCH USB Oscilloscope, DS-2025CA Digital Oscilloscope, 25MHz freq. ,dual channelSpecifications: SpecificationsDS-2025CAChannels2+Ext.TriggerBandwidth25MHzRising time13 ... rate500MSa/aEquivalent sample rate50GSa/sInput impedance1MΩ//13pFInput couplingDC, AC, GNDTriggerEdge, video, pulse, delayAcquisition modesAuto, normal, singleTrigger sourcesCH1, CH2, Ext, Ext/5 ...