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