Keywords: class-weighting

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# Switching modes

CLASS supports 3 major switching modes (see the MRTCAL user documentation for a more complete description):

- position switching (abbreviated into psw),
- wobbler switching (abbreviated into wsw),
- frequency switching (abbreviated into fsw).

The frequency switching mode can be divided into 2 subcategories:

- unfolded frequency switching (abbreviated ufsw),
- folded frequency switching (abbreviated ffsw).

Up to sep19 GILDAS version, CLASS used the same weighting definitions for all switching modes. In particular for the `TIME` weights

| (1)

where is defined above.