Waveform 308 represents {HEAD ~ the duty cycle} of {TAIL ~ the pulse width modulated signal} applied to the transistor switch 64 for controlling the voltage and current of the solenoid 16 
Waveform 308 represents { HEAD ~ the duty cycle } of { TAIL ~ the pulse width modulated signal } applied to the transistor switch 64 for controlling the voltage and current of the solenoid 16
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH