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