Accurate measurement of one-bond H-X heteronuclear dipolar couplings in MAS solid-state NMR

► We analyze systematic errors in dipolar-coupling measurements in solids under MAS. ► The REDOR sequence has the smallest errors if protons are diluted. ► T-MREV also leads to small errors but can only be used at low MAS frequencies. ► Accurate dipolar couplings are important for the quantification of dynamics in proteins.