... Back-up LCD back-light adjustment Support 3.8”TFT panel Application:1. Design and Debug2. Circuit function test3. Education and ... , Delay A→B Waveform math +,-,×,÷, Inverted Digital Multimeter Testing Voltage, Current, Resistance, Capacitance, Diode, Continuity Multimeter specifications Input Impedance 10 MΩ Max input ...