... portable PC-based Digital Oscilloscope.High performanceDSO-2090 USB has the following features: 40MHz analog bandwidth, 100MHz real-time sampling.USB ... frequency, positive pulse width, negative pulse width, rise time (10%~90%), fall time (10%~90%), positive duty cycle, negative duty cycle ... 33(mm) Portable Oscilloscope Hantek DSO-2090 DSO2090 Digital Oscilloscope USB PC Oscilloscope 100MS/s 40MHz