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