5 COMPONENTS General XF 95 series Square wave signal Square wave signals are signals with only two voltage levels, both of which have the same duration in principle (t1 is equal to t2). + t 1 0 t 2 2 If the duration is different for the two levels (t1 is not equal to t2), the signal is also called ‘pulse train’. + 0 Duty cycle The duty cycle is the ratio between the two voltage levels, expressed as a percentage. A — x 100% B The voltage level ratio of a pulse train may change (for example, when the vehicle speed increases). If the number of pulses per unit of time increases, the duty cycle reading will rise.
A + B 0 Voltage An increase in the number of pulses per unit of time will not only lead to a higher duty cycle ratio but also to a higher mean voltage. A + 0 1-4 200303 t2 B