The QDB 5A is a multi-function automotive diagnostic tool designed for testing various vehicle components. It features:

• Oscilloscope Function: Tests sensor signals and displays waveforms.

• PWM Drive Output: Drives solenoid valves and stepper motors.

• Multimeter: Measures voltage, resistance, current, and capacitance.

• Signal Simulation: Simulates Hall signals for sensors like air conditioning pressure and flow meters.

• Built-in Oscilloscope: Provides real-time waveform analysis.
  This tool is primarily used by mechanics to diagnose electrical faults in vehicles