1) Manual locking and shimming, and taking a trial spectrum.
Most of the time, routine data acquisition through the study method will work, assuming good sample preparation. But occasionally you will encounter challenges, for example poor line-shape, inability to adequately lock or shim, artifacts from too much signal, truncation wiggles, etc. In these cases it is quite useful to do some of these steps manually, inspect a trial (1 or 2 scan) spectrum before continuing with your study. This video goes through how to load default shims, manually lock onto a chosen solvent, manually adjust Z1 and Z2 shim coils, execute gradient shimming, and collect a trial spectrum.
