A method is given for identifying families of signals belonging to the same network of coupled spins in NMR. The method exploits the existence of a coupling network to prove the connectivity between 2 remote nuclei A and X in the AMX system. Two or more consecutive steps are employed where transverse magnetization is relayed from nucleus to nucleus along a path defined by a sequence of resolved couplings. The spectrum of crotonaldehyde is discussed. [on SciFinder (R)]