If a line catalog is selected, the Pipeline scripts will produce one image for each spectral line falling into the observed "high resolution" spectral windows, over the specified velocity range ALL%RANGE.
If no line catalog is selected, all channels of all "high resolution" spectral windows will be imaged. No velocity range is used in this case but the spectral resolution can be modified by ALL%RANGE[3].
"Low resolution" spectral windows will be used to produce continuum only images. The distinction between "Low" and "High" resolution spectral windows is made from variable ALL%MINFRES