... USB developed by our company. is a portable PC-based Digital Oscilloscope.High performanceDSO-2090 USB has the following features: 40MHz ... resolution 8 bits/channel Gain range 10mV ~ 5V/div @ x1 probe(10mV, 20mV, 50mV, 100mV, 200mV, 500mV, 1V, 2V, 5V/div1 ... ,5 sequence) 100mV ~ 50V/div @ x10 probe 1V ~ 500V/div @ x100 probe 10V ~ 5KV/div @ x1000 probe Range 8 divisions Offset level +/-4 ...