The first synthesizer generates an output signal having pilot tones based on {HEAD ~ the path} turning {TAIL ~ signal} and the intermodulation compensation signal 
turning
The first synthesizer generates an output signal having pilot tones based on { HEAD ~ the path } turning { TAIL ~ signal } and the intermodulation compensation signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH