States quadrature:change the phase by 900 for each t increment to select cosine and sine components of S-spin magnetization 1.For each value of t, 14 4 4 31 acquire two FIDs which phase =1 are stored separately,cor- 1=6x 1=x,-术 responding to phase=1 2■x,-水，-x and phase=2. 31=,-x-， G 2.For the FID with phase=1,set 01=x,-x.This transfers 215.21.s 21.S es 21S es 21,S.cs ly cos(osh) IS cos(@st)to proton 21Sx ss -25x ss 2fSx ss (at the end of the se- 2I-S cs=cos(oos 11) quence ss =sin(os 1) 2.For the FID with phase=2,set 4 phase =2 4 31 1=y-y.This transfers IS sin(@st to proton 01=5-y =5少 (at the end of the se- 2=x,x-x,-x quence. φ31=x,--x,x 2S21S 21.S,cs -21Sxes 2hSxes 21-Sy ss 21-S:ss 2lxSzss ly sin(os f1)