... sample rate 3.2channle, color display 4.with USB interface MCH USB Oscilloscope, DS-2025CA Digital Oscilloscope, 25MHz freq. ... /aEquivalent sample rate50GSa/sInput impedance1MΩ//13pFInput couplingDC, AC, GNDTriggerEdge, video, pulse, delayAcquisition modesAuto, normal, singleTrigger sourcesCH1, CH2, Ext ... change without prior notice. 25Mhz DS-2025CA USB digital Oscilloscope dual channel 25MHz freq.,