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