... current instrument adopts Fourier transformation method to analyze the signal in real time, calculate and restore the main frequency and high times ... step.Probe gain: 0~3 adjustable in succession.Several filter modes. Automatic calendar and time showing.Real-time display F1, F2, F3, F4, ... F5, F6 or F7 impedance plane figure.Real-time display F1, F3, F5, F7 frequency spectrum diagram.Set the ...