Modulated Square Wave: Notes

A Modulated Square Wave is a series of High/Low signals repeated rapidly.

Like the switched signals (B+, B-) the square wave has only two voltage levels.

A high level and a low level.

Fig 1: Identifying Modulated Square Wave

Courtesy of BMW OF NORTH AMERICA, INC.

A modulated square wave has 3 characteristics that can be modified to vary the signal:

• Frequency.
• Pulse Width.
• Duty Cycle.