A 406 MHZ RF source 17 is coupled to {TAIL ~ a first bandpass filter} 18 which is tuned to {HEAD ~ 406 MHZ} 
A 406 MHZ RF source 17 is coupled to { TAIL ~ a first bandpass filter } 18 which is tuned to { HEAD ~ 406 MHZ }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD