{HEAD ~ The voltage comparator} produces {TAIL ~ a first signal} when the detected signal is below the squelch level and produces a second signal when the detected signal is above the squelch level 
{ HEAD ~ The voltage comparator } produces { TAIL ~ a first signal } when the detected signal is below the squelch level and produces a second signal when the detected signal is above the squelch level
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH