Keywords: class

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## Folding Frequency Switched Spectra

Spectra obtained by Frequency Switching need to be folded to obtain the source spectra. It is usually a good idea to remove a baseline before the spectra are folded in order to use as much baseline as possible. The folding is done by command `FOLD` which reads from the corresponding section all the necessary parameters. `FOLD` only operates on the `R` buffer. The number of channels is decreased to keep only the relevant part of the resulting spectrum.