Instruct UV_FIT to fit a Continuum channel derived from the current UV table instead of per-channel values.
Field is the field size to determine the number of channels that can be averaged together. If not specified, it is derived by default like for UV_MAP /CONTINUUM. The additional option /INDEX can be used to specify a spectral index and a reference frequency, while /RANGE can be used to restrict the channel range used for the continuum.
This option is incompatible with /WIDGET and /SAVE.