Determining signal to noise ratio
From NMR Wiki
This manual explains how to determine S/N ratio in 1D NMR spectra. It's a ratio between the intensity variation in the spectral region containing peaks (singnal) and in the peak free region (noise). Select platform below.
Command: dsn - display signal to noise ratio.
Transform data (use ft for simple Ft or wft for weighted FT)
Display trace to use for S/N determination
ds(<n>)
where n is number of trace to display.
Zoom onto the region of interest.
With left and right cursors define the region with no signals - only noise
Type dsn
Command: sino
To use it, first define signal region, i.e. from where intensity of tallest peak will be measured
sigf1 <start of signal region> sigf2 <end of signal region>
Next, define noise region, i.e. a region with no signals, just noise
noisf1 <start of noise region> noisf2 <end of noise region>
Type sino
