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In this video, I have explained how we get the NMR spectrum from the FID signal. Along with I have also introduced a very short introduction of CW NMR spectromrter and FT NMR spectrometer.
https://www.youtube.com/watch?v=OkLISMm884c
https://www.youtube.com/watch?v=XtwBMBkVMXc
https://www.youtube.com/watch?v=YM7EqPpq42M
https://www.youtube.com/watch?v=0TJpTsNeONA