{HEAD ~ a receiver mixer} connected directly to an output of {TAIL ~ the circulator interface} to the transmitter and antenna 
{ HEAD ~ a receiver mixer } connected directly to an output of { TAIL ~ the circulator interface } to the transmitter and antenna
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH