The reference signal is preferably provided by a sine/cosine generator from {HEAD ~ pulses} provided by {TAIL ~ a divide} by N counter occurring at the multiplex frequency, with the divisor N being controlled by the tone switching logic circuit 
provided by
The reference signal is preferably provided by a sine / cosine generator from { HEAD ~ pulses } provided by { TAIL ~ a divide } by N counter occurring at the multiplex frequency , with the divisor N being controlled by the tone switching logic circuit
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH