Oscilloscopes are used to observe the change of an electrical signal over time, such that voltage and time describe a shape which is continuously graphed against a calibrated scale. The observed waveform can be analyzed for such properties as amplitude, frequency, rise time, time interval, distortion and others. Bandwidth 50Mhz. Y Deflection 2mV/div ~ 50V/div . Max Input 400V (DC + ACPEAK) frequency ? 400Hz (when impedance is 1 M?) . Sweep Mode Time Base . Trigger Level Range Internal Trigger: ±4 div . External Trigger: ±1.6 div.