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NMR II Fourierova transformace, akviziční parametry

NMR II Fourierova transformace, akviziční parametry. FID (Free Induction Decay) – Fourierova transformace - Spektrum. FT. w. čas. FT. Kvadraturn í detekce. e + i x = cos x + i sin x e - i x = cos x – i sin x F ( w ) = ∫ f ( t ) e - i w t d t

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NMR II Fourierova transformace, akviziční parametry

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  1. NMR II Fourierova transformace, akviziční parametry

  2. FID (Free Induction Decay) – Fourierova transformace - Spektrum FT w čas FT

  3. Kvadraturní detekce

  4. e+ix = cos x + i sin x e-ix = cos x – i sin x F(w) = ∫f(t) e-iwtdt F(w) = ∫f(t) [cos(wt) – i sin(wt)]dt F(w) = Sf(t) [cos(wt) – i sin(wt)] dt

  5. signál cos(wt) w = 4 signál w = 4 zkušební w = 1 S = 0

  6. signál w = 4 zkušební w = 2 S = 0 signál w = 4 zkušební w = 4 S = x

  7. Akviziční parametry N = 2 x SW x AT N – počet digitalizovaných bodů SW – šířka spektra v Hz AT – akviziční čas

  8. Akviziční parametry Digitální rozlišení DR DR = 2 SW / N = 1 / AT

  9. Akviziční parametry

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