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Click on Save and Close when you're satisfied with the channel routing for your experiments. Then, to initiate the automatic tuning and matching procedure, use the command atma. Later, manual adjustments can be made using the manual tuning and matching procedure via atmm.This window will open:

You want to make sure that all the wobble curves peak at the desired frequency. Later, manual adjustments can be made using the manual tuning and matching procedure via atmm.

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Shim

Shimming is an important process where adjustments are made in order to obtain a homogeneous magnetic field around the sample in the probe. This will result in better spectral resolution. It is necessary to shim each time a sample is inserted in the magnet. If not optimized, nuclei in one part of the tube will experience a different field than nuclei in another part of the sample tube.

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Enter the command topshim gui to open the GUI.

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Once the shimming procedure is done, the shim adjustments will be listed in the Report tab.

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Expect a duration of about 30 seconds for 1D shimming, and 5-6 minutes for 3D shimming.

If you are using a Shigemi tube, make sure you include the shigemi mention in the parameters section.

Data acquisition

Processing

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