{HEAD ~ means} for guiding {TAIL ~ the DC power}, low frequency control signals and RF video signals 
{ HEAD ~ means } for guiding { TAIL ~ the DC power } , low frequency control signals and RF video signals
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH