Multimeter & Oscilloscopes

Pulsed Signal Measurement

Known as Duty Cycle, describes the “On Time” for a pulsed signal. We can report duty cycle in units of time, but usually as a percentage.

• Plug the black test lead into the COM terminal & red test lead into the V terminal. • Set the function switch to Hz (Hertz). • Connect the test leads to the circuit to be tested in Parallel . • A positive symbol (+) indicates Positive time percent voltage measurement. • A negative symbol (-) indicates Negative time percent voltage measurement.

Duty cycle changing but the Frequency staying the same. This is known as Pulse Width Modulation (PWM)

Duty cycle staying the same but frequency changing