... :7.8 inch color LCD,STN screen,640x480 pixelsIsolation between channel:50Hz(100:1),10MHz(25:1)Input impedance:1MΩ±2 ... centerTrigger mode:Auto, Normal, Single;Automatic measurement:Vpp, Vavg, RMS, Frequency, Period, Vmax, Vmin, Vtop, Vbase, Width, Overshoot, Pre - shoot, Rise ...