... edge can be observedMax. Input voltage400V (DC+AC peak value) when≤1KHzInput couplingCH1, CH2,AC, DC groundingCH3, AC, DCDisplay modeCH1, CH2, CH3, superposition, ... : 2mV to 5V/division +/-3%Phase difference≤3º, DC-50KHzBandwidth of X axleDC-500KHz (-3dB)Horizontal reflection systemTriggering ... waveformFrequency: 1KHz 20%Voltage: 0.5V 1%Power supply220V/110V +/-10%; 50/60HzDimensions310(W) x 130(H) x ...