In one embodiment, the system 40 may require {HEAD ~ means} for converting optical data related to {TAIL ~ the rotor shaft} 50 to a voltage and then using telemetry for transmitting the voltage signal 
In one embodiment , the system 40 may require { HEAD ~ means } for converting optical data related to { TAIL ~ the rotor shaft } 50 to a voltage and then using telemetry for transmitting the voltage signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH