Converting spectral window to o1p and sw (and vice versa)

To translate a given sw and o1p to spectral limits, use

  • leftlimit = o1p + sw/2
  • rightlimit = o1p sw/2

For example, o1p = 6ppm and sw = 20ppm translates into a window of -4ppm to 16ppm.

Converting a spectral window  leftlimit to rightlimit to sw and o1p

  • sw = leftlimit – rightlimit
  • o1p = rightlimit + sw/2

For example, for a 10-190ppm window, sw=180ppm and o1p=100ppm.