radio reception means, driven by {HEAD ~ a first power supply voltage}, for receiving radio carrier waves and identifying {TAIL ~ a unique call signal} conveyed by said radio carrier waves 
radio reception means , driven by { HEAD ~ a first power supply voltage } , for receiving radio carrier waves and identifying { TAIL ~ a unique call signal } conveyed by said radio carrier waves
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH