If△=1/(2×sw1)or half the dwell time, 1 st order(lp1)=-360×sw1×1/(2×sw1)=-180 zero order(rp1)=90 there is no need to calculate the phase constants 1H decoupled HSQC 2xpw 1/4Us 1/4Js 1 1/2 t/2 G 4(0)= -2x(2×pwx/π)-2×pW (2×swl) △=2×(2×pwx/π)+2×pw+4(O) 1 (2×swI)