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