NMR Tutor

Learn NMR by shaping simulated FIDs, spectra, apodization, noise, Fourier transforms, phase, shimming, and coupling in real time.

NMR Tutor is an interactive introduction to NMR data acquisition and signal processing.

Use simulated free induction decays (FIDs) and spectra to explore how time-domain NMR signals become frequency-domain spectra. Adjust peak positions, decay, noise, apodization, zero filling, phase behavior, and common acquisition artifacts, then see the effect immediately in the FID and final spectrum.

The app displays real and imaginary FID channels before and after processing, together with the resulting spectrum after Fourier transformation. Add noise and change the number of scans to see how signal-to-noise improves through averaging. Apply zero filling to see how digital interpolation changes the appearance of the spectrum without adding new measured data.

You can also introduce common receiver or acquisition faults into the FID and observe the artifacts that appear after processing. As an advanced example, add spin-spin coupling to create an AB coupling pattern, then move the peaks or change the coupling strength to compare AB behavior with an AX spin system.