... 3.2channle, color display 4.with USB interface MCH USB Oscilloscope, DS-2025CA Digital Oscilloscope, ... 25MHz freq. ,dual channelSpecifications: SpecificationsDS-2025CAChannels2+Ext.TriggerBandwidth25MHzRising time13.8nsTime base5ns to 50s/divReal time ... Vbase,Vbase,Vavg,Freq,Period,Rise timeFall time,+width,-width,overshoot,preshoot,+duty,-duty,etcMath ...