{HEAD ~ A preferred method} for evaluating the signal channels of the network includes connecting a reference unit to the reference junction and successively positioning each device probing end that corresponds to a signal channel of {TAIL ~ interest} on the inner probing area 
{ HEAD ~ A preferred method } for evaluating the signal channels of the network includes connecting a reference unit to the reference junction and successively positioning each device probing end that corresponds to a signal channel of { TAIL ~ interest } on the inner probing area
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH