The modem provides {HEAD ~ a calibration signal} for calibrating a modulation characteristic of the supply modulator, to {TAIL ~ the supply modulator} 
The modem provides { HEAD ~ a calibration signal } for calibrating a modulation characteristic of the supply modulator , to { TAIL ~ the supply modulator }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL