Relaxation delay second order spectra

The second shortcut is to drastically reduce the digital resolution in the 2D spectrum typically the data is collected to provide 2-4 Hz per point digital resolution in the final spectrum. Typical 2 times are 0.05-0.2 s, an order of magnitude smaller than those used in ID NMR spectroscopy. The use of longer acquisition times has very little effect on data collection times. If a 1 s relaxation delay is used, increasing from 0.05 to 0.2 s results in 15% longer experiment time and provides a four-fold increase in digital resolution in fi (and a four-fold increase in the size of the data file). The same is not true in the dimension. 

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