The invention also provides {TAIL ~ the capability} of spectrum analysis, that is, of analysis of the frequency components of a received carrier wave, typically transmitted by {HEAD ~ an active source} 
The invention also provides { TAIL ~ the capability } of spectrum analysis , that is , of analysis of the frequency components of a received carrier wave , typically transmitted by { HEAD ~ an active source }
OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD