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