3.7" usb digital oscilloscope *Digital oscilloscope *Bandwidth:20MHz Sample Rate ( Real time ):100MS/s USB ... , Probe attenuation 10:1) Trigger Type Edge, Video, Alternate Trigger Mode Auto, Normal, Single Trigger level ±6 divisions from screen center ... ,Preshoot,Risetime,Falltime,+Width,-Width,+Duty,-Duty, Delay A→B , Delay A→B Waveform math +, -, ×, ÷, FFT Waveform storage 4 waveforms Lissajou’s ...